Lint Report

Overview

	Correctness
7	GradleDependency: Obsolete Gradle Dependency
1	GradleDynamicVersion: Gradle Dynamic Version
	Security
1	AllowBackup: AllowBackup/FullBackupContent Problems
	Performance
1	AnnotationProcessorOnCompilePath: Annotation Processor on Compile Classpath
4	ObsoleteSdkInt: Obsolete SDK_INT Version Check
1	Overdraw: Overdraw: Painting regions more than once
78	UnusedResources: Unused resources
	Usability:Icons
1	IconMissingDensityFolder: Missing density folder
	Productivity
2	KtxExtensionAvailable: KTX Extension Available
	Accessibility
1	ContentDescription: Image without `contentDescription`
	Internationalization
3	HardcodedText: Hardcoded text
	Disabled Checks (37)

Obsolete Gradle Dependency

../../build.gradle:33: A newer version of androidx.appcompat:appcompat than 1.0.0 is available: 1.2.0

 30 }
 31 
 32 dependencies {
 33     implementation 'androidx.appcompat:appcompat:1.0.0'                                             
 34     implementation 'com.google.android.material:material:1.0.0'
 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'

../../build.gradle:34: A newer version of com.google.android.material:material than 1.0.0 is available: 1.3.0

 31 
 32 dependencies {
 33     implementation 'androidx.appcompat:appcompat:1.0.0'
 34     implementation 'com.google.android.material:material:1.0.0'                                     
 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'

../../build.gradle:35: A newer version of androidx.constraintlayout:constraintlayout than 1.1.3 is available: 2.0.4

 32 dependencies {
 33     implementation 'androidx.appcompat:appcompat:1.0.0'
 34     implementation 'com.google.android.material:material:1.0.0'
 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'                               
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'

../../build.gradle:36: A newer version of androidx.navigation:navigation-fragment than 2.0.0-rc02 is available: 2.3.5

 33     implementation 'androidx.appcompat:appcompat:1.0.0'
 34     implementation 'com.google.android.material:material:1.0.0'
 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'                             
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'

../../build.gradle:37: A newer version of androidx.navigation:navigation-ui than 2.0.0-rc02 is available: 2.3.5

 34     implementation 'com.google.android.material:material:1.0.0'
 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'                                   
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 40     compileOnly 'org.projectlombok:lombok:1.18.20'

../../build.gradle:38: A newer version of androidx.test.ext:junit than 1.1.1 is available: 1.1.2

 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'                                       
 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 40     compileOnly 'org.projectlombok:lombok:1.18.20'
 41     annotationProcessor 'org.projectlombok:lombok:1.18.20'

../../build.gradle:39: A newer version of androidx.test.espresso:espresso-core than 3.1.0 is available: 3.3.0

 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'                          
 40     compileOnly 'org.projectlombok:lombok:1.18.20'
 41     annotationProcessor 'org.projectlombok:lombok:1.18.20'
 42     implementation "androidx.core:core-ktx:+"

GradleDependency Correctness Warning Priority 4/10

Gradle Dynamic Version

../../build.gradle:42: Avoid using + in version numbers; can lead to unpredictable and unrepeatable builds (androidx.core:core-ktx:+)

 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 40     compileOnly 'org.projectlombok:lombok:1.18.20'
 41     annotationProcessor 'org.projectlombok:lombok:1.18.20'
 42     implementation "androidx.core:core-ktx:+"                                                       
 43     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 44 }
 45 repositories {

Using + in dependencies lets you automatically pick up the latest available version rather than a specific, named version. However, this is not recommended; your builds are not repeatable; you may have tested with a slightly different version than what the build server used. (Using a dynamic version as the major version number is more problematic than using it in the minor version position.)
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "GradleDynamicVersion" as explained in the Suppressing Warnings and Errors section.

GradleDynamicVersion Correctness Warning Priority 4/10

AllowBackup/FullBackupContent Problems

../../src/main/AndroidManifest.xml:10: On SDK version 23 and up, your app data will be automatically backed up and restored on app install. Consider adding the attribute android:fullBackupContent to specify an @xml resource which configures which files to backup. More info: https://developer.android.com/training/backup/autosyncapi.html

  7          ACCESS_COARSE_LOCATION instead. -->
  8     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
  9 
 10     <application                                                                                    
 11         android:allowBackup="true"
 12         android:icon="@mipmap/ic_launcher"
 13         android:label="@string/app_name"

The allowBackup attribute determines if an application's data can be backed up and restored. It is documented at https://developer.android.com/reference/android/R.attr.html#allowBackup

By default, this flag is set to true which means application data can be backed up and restored by the OS. Setting allowBackup="false" opts the application out of being backed up and so users can't restore data related to it when they go through the device setup wizard.

Allowing backups may have security consequences for an application. Currently adb backup allows users who have enabled USB debugging to copy application data off of the device. Once backed up, all application data can be read by the user. adb restore allows creation of application data from a source specified by the user. Following a restore, applications should not assume that the data, file permissions, and directory permissions were created by the application itself.

To fix this warning, decide whether your application should support backup, and explicitly set android:allowBackup=(true|false)".

If not set to false, and if targeting API 23 or later, lint will also warn that you should set android:fullBackupContent to configure auto backup.

More info:

Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "AllowBackup" as explained in the Suppressing Warnings and Errors section.

AllowBackup Security Warning Priority 3/10

Annotation Processor on Compile Classpath

../../build.gradle:40: Add annotation processor to processor path using annotationProcessor instead of compileOnly

 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 40     compileOnly 'org.projectlombok:lombok:1.18.20'                                                  
 41     annotationProcessor 'org.projectlombok:lombok:1.18.20'
 42     implementation "androidx.core:core-ktx:+"
 43     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

This dependency is identified as an annotation processor. Consider adding it to the processor path using annotationProcessor instead of including it to the
compile path.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "AnnotationProcessorOnCompilePath" as explained in the Suppressing Warnings and Errors section.

AnnotationProcessorOnCompilePath Performance Warning Priority 8/10

Obsolete SDK_INT Version Check

../../src/main/res/drawable-v21: This folder configuration (v21) is unnecessary; minSdkVersion is 26. Merge all the resources in this folder into drawable.
../../src/main/res/drawable-v24: This folder configuration (v24) is unnecessary; minSdkVersion is 26. Merge all the resources in this folder into drawable.
../../src/main/res/mipmap-anydpi-v26: This folder configuration (v26) is unnecessary; minSdkVersion is 26. Merge all the resources in this folder into mipmap-anydpi.
../../src/main/res/values-v23: This folder configuration (v23) is unnecessary; minSdkVersion is 26. Merge all the resources in this folder into values.

This check flags version checks that are not necessary, because the minSdkVersion (or surrounding known API level) is already at least as high as the version checked for.

Similarly, it also looks for resources in -vNN folders, such as values-v14 where the version qualifier is less than or equal to the minSdkVersion, where the contents should be merged into the best folder.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "ObsoleteSdkInt" as explained in the Suppressing Warnings and Errors section.

ObsoleteSdkInt Performance Warning Priority 6/10

Overdraw: Painting regions more than once

../../src/main/res/layout/chat_fragment.xml:5: Possible overdraw: Root element paints background @color/white with a theme that also paints a background (inferred theme is @style/Theme.BlueChatRoom2)

  2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     android:layout_width="match_parent"
  4     android:layout_height="match_parent"
  5     android:background="@color/white"                                                               
  6     android:focusableInTouchMode="true"
  7     android:clickable="true"
  8     android:focusable="true"

Overdraw Performance Warning Priority 3/10

Unused resources

../../src/main/res/drawable/button_background.xml:2: The resource R.drawable.button_background appears to be unused

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <shape xmlns:android="http://schemas.android.com/apk/res/android"                                   
 3     android:shape="rectangle">
 4     <solid android:color="@android:color/transparent"/>
 5     <corners android:radius="35dp" />

../../src/main/res/layout/chat_fragment.xml:2: The resource R.layout.chat_fragment appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"                          
  3     android:layout_width="match_parent"
  4     android:layout_height="match_parent"
  5     android:background="@color/white"

../../src/main/res/drawable/circular_background.xml:2: The resource R.drawable.circular_background appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <shape                                                                                              
  3     xmlns:android="http://schemas.android.com/apk/res/android"
  4     android:shape="oval">

../../src/main/res/values/colors.xml:7: The resource R.color.teal_700 appears to be unused

  4     <color name="purple_500">#FF6200EE</color>
  5     <color name="purple_700">#FF3700B3</color>
  6     <color name="teal_200">#FF03DAC5</color>
  7     <color name="teal_700">#FF018786</color>                                                        
  8     <color name="black">#FF000000</color>
  9     <color name="colorPrimary">#AEDBFF</color>
 10     <color name="colorPrimaryDark">#AEDBFF</color>

../../src/main/res/values/colors.xml:8: The resource R.color.black appears to be unused

  5     <color name="purple_700">#FF3700B3</color>
  6     <color name="teal_200">#FF03DAC5</color>
  7     <color name="teal_700">#FF018786</color>
  8     <color name="black">#FF000000</color>                                                           
  9     <color name="colorPrimary">#AEDBFF</color>
 10     <color name="colorPrimaryDark">#AEDBFF</color>
 11     <color name="colorAccent">#673AB7</color>

../../src/main/res/values/colors.xml:9: The resource R.color.colorPrimary appears to be unused

  6     <color name="teal_200">#FF03DAC5</color>
  7     <color name="teal_700">#FF018786</color>
  8     <color name="black">#FF000000</color>
  9     <color name="colorPrimary">#AEDBFF</color>                                                      
 10     <color name="colorPrimaryDark">#AEDBFF</color>
 11     <color name="colorAccent">#673AB7</color>
 12     <color name="colorPrimaryText">#212121</color>

../../src/main/res/values/colors.xml:10: The resource R.color.colorPrimaryDark appears to be unused

  7     <color name="teal_700">#FF018786</color>
  8     <color name="black">#FF000000</color>
  9     <color name="colorPrimary">#AEDBFF</color>
 10     <color name="colorPrimaryDark">#AEDBFF</color>                                                  
 11     <color name="colorAccent">#673AB7</color>
 12     <color name="colorPrimaryText">#212121</color>
 13     <color name="colorPrimaryLightDark">#AEDBFF</color>

../../src/main/res/values/colors.xml:11: The resource R.color.colorAccent appears to be unused

  8     <color name="black">#FF000000</color>
  9     <color name="colorPrimary">#AEDBFF</color>
 10     <color name="colorPrimaryDark">#AEDBFF</color>
 11     <color name="colorAccent">#673AB7</color>                                                       
 12     <color name="colorPrimaryText">#212121</color>
 13     <color name="colorPrimaryLightDark">#AEDBFF</color>
 14     <color name="colorSecondaryText">#757575</color>

../../src/main/res/values/colors.xml:12: The resource R.color.colorPrimaryText appears to be unused

  9     <color name="colorPrimary">#AEDBFF</color>
 10     <color name="colorPrimaryDark">#AEDBFF</color>
 11     <color name="colorAccent">#673AB7</color>
 12     <color name="colorPrimaryText">#212121</color>                                                  
 13     <color name="colorPrimaryLightDark">#AEDBFF</color>
 14     <color name="colorSecondaryText">#757575</color>
 15     <color name="light">#DDDDDD</color>

../../src/main/res/values/colors.xml:13: The resource R.color.colorPrimaryLightDark appears to be unused

 10     <color name="colorPrimaryDark">#AEDBFF</color>
 11     <color name="colorAccent">#673AB7</color>
 12     <color name="colorPrimaryText">#212121</color>
 13     <color name="colorPrimaryLightDark">#AEDBFF</color>                                             
 14     <color name="colorSecondaryText">#757575</color>
 15     <color name="light">#DDDDDD</color>
 16     <color name="white">#FFFFFF</color>

../../src/main/res/values/colors.xml:14: The resource R.color.colorSecondaryText appears to be unused

 11     <color name="colorAccent">#673AB7</color>
 12     <color name="colorPrimaryText">#212121</color>
 13     <color name="colorPrimaryLightDark">#AEDBFF</color>
 14     <color name="colorSecondaryText">#757575</color>                                                
 15     <color name="light">#DDDDDD</color>
 16     <color name="white">#FFFFFF</color>
 17     <color name="transparent">#00ffffff</color>

../../src/main/res/values/colors.xml:15: The resource R.color.light appears to be unused

 12     <color name="colorPrimaryText">#212121</color>
 13     <color name="colorPrimaryLightDark">#AEDBFF</color>
 14     <color name="colorSecondaryText">#757575</color>
 15     <color name="light">#DDDDDD</color>                                                             
 16     <color name="white">#FFFFFF</color>
 17     <color name="transparent">#00ffffff</color>
 18     <color name="grey">#BDBDBD</color>

../../src/main/res/values/colors.xml:16: The resource R.color.white appears to be unused

 13     <color name="colorPrimaryLightDark">#AEDBFF</color>
 14     <color name="colorSecondaryText">#757575</color>
 15     <color name="light">#DDDDDD</color>
 16     <color name="white">#FFFFFF</color>                                                             
 17     <color name="transparent">#00ffffff</color>
 18     <color name="grey">#BDBDBD</color>
 19     <color name="blueDefault">#AEDBFF</color>

../../src/main/res/values/colors.xml:17: The resource R.color.transparent appears to be unused

 14     <color name="colorSecondaryText">#757575</color>
 15     <color name="light">#DDDDDD</color>
 16     <color name="white">#FFFFFF</color>
 17     <color name="transparent">#00ffffff</color>                                                     
 18     <color name="grey">#BDBDBD</color>
 19     <color name="blueDefault">#AEDBFF</color>
 20     <color name="blueSecondary">#def0ff</color>

../../src/main/res/values/colors.xml:18: The resource R.color.grey appears to be unused

 15     <color name="light">#DDDDDD</color>
 16     <color name="white">#FFFFFF</color>
 17     <color name="transparent">#00ffffff</color>
 18     <color name="grey">#BDBDBD</color>                                                              
 19     <color name="blueDefault">#AEDBFF</color>
 20     <color name="blueSecondary">#def0ff</color>
 21     <color name="abGreen">#00ff8b</color>

../../src/main/res/values/colors.xml:19: The resource R.color.blueDefault appears to be unused

 16     <color name="white">#FFFFFF</color>
 17     <color name="transparent">#00ffffff</color>
 18     <color name="grey">#BDBDBD</color>
 19     <color name="blueDefault">#AEDBFF</color>                                                       
 20     <color name="blueSecondary">#def0ff</color>
 21     <color name="abGreen">#00ff8b</color>
 22     <color name="bbGreen">#3ce699</color>

../../src/main/res/values/colors.xml:20: The resource R.color.blueSecondary appears to be unused

 17     <color name="transparent">#00ffffff</color>
 18     <color name="grey">#BDBDBD</color>
 19     <color name="blueDefault">#AEDBFF</color>
 20     <color name="blueSecondary">#def0ff</color>                                                     
 21     <color name="abGreen">#00ff8b</color>
 22     <color name="bbGreen">#3ce699</color>
 23     <color name="blueForButtons">#023e8a</color>

../../src/main/res/values/colors.xml:21: The resource R.color.abGreen appears to be unused

 18     <color name="grey">#BDBDBD</color>
 19     <color name="blueDefault">#AEDBFF</color>
 20     <color name="blueSecondary">#def0ff</color>
 21     <color name="abGreen">#00ff8b</color>                                                           
 22     <color name="bbGreen">#3ce699</color>
 23     <color name="blueForButtons">#023e8a</color>
 24 </resources>

../../src/main/res/values/colors.xml:22: The resource R.color.bbGreen appears to be unused

 19     <color name="blueDefault">#AEDBFF</color>
 20     <color name="blueSecondary">#def0ff</color>
 21     <color name="abGreen">#00ff8b</color>
 22     <color name="bbGreen">#3ce699</color>                                                           
 23     <color name="blueForButtons">#023e8a</color>
 24 </resources>

../../src/main/res/values/colors.xml:23: The resource R.color.blueForButtons appears to be unused

 20     <color name="blueSecondary">#def0ff</color>
 21     <color name="abGreen">#00ff8b</color>
 22     <color name="bbGreen">#3ce699</color>
 23     <color name="blueForButtons">#023e8a</color>                                                    
 24 </resources>

../../src/main/res/layout/content_main.xml:2: The resource R.layout.content_main appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     xmlns:app="http://schemas.android.com/apk/res-auto"
  4     xmlns:tools="http://schemas.android.com/tools"
  5     android:layout_width="match_parent"

../../src/main/res/drawable/dashed_background.xml:2: The resource R.drawable.dashed_background appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <shape xmlns:android="http://schemas.android.com/apk/res/android"                                   
  3     android:shape="line">
  4     <stroke
  5         android:color="@color/light"

../../src/main/res/values/dimens.xml:2: The resource R.dimen.fab_margin appears to be unused

  1 <resources>
  2     <dimen name="fab_margin">16dp</dimen>                                                           
  3     <dimen name="titleTextSize">21sp</dimen>
  4     <dimen name="buttonHeight">55dp</dimen>
  5     <dimen name="large_32_margin">32dp</dimen>

../../src/main/res/values/dimens.xml:3: The resource R.dimen.titleTextSize appears to be unused

  1 <resources>
  2     <dimen name="fab_margin">16dp</dimen>
  3     <dimen name="titleTextSize">21sp</dimen>                                                        
  4     <dimen name="buttonHeight">55dp</dimen>
  5     <dimen name="large_32_margin">32dp</dimen>
  6     <dimen name="large_6_margin">50dp</dimen>

../../src/main/res/values/dimens.xml:4: The resource R.dimen.buttonHeight appears to be unused

  1 <resources>
  2     <dimen name="fab_margin">16dp</dimen>
  3     <dimen name="titleTextSize">21sp</dimen>
  4     <dimen name="buttonHeight">55dp</dimen>                                                         
  5     <dimen name="large_32_margin">32dp</dimen>
  6     <dimen name="large_6_margin">50dp</dimen>
  7     <dimen name="large_label_margin">8dp</dimen>

../../src/main/res/values/dimens.xml:5: The resource R.dimen.large_32_margin appears to be unused

  2     <dimen name="fab_margin">16dp</dimen>
  3     <dimen name="titleTextSize">21sp</dimen>
  4     <dimen name="buttonHeight">55dp</dimen>
  5     <dimen name="large_32_margin">32dp</dimen>                                                      
  6     <dimen name="large_6_margin">50dp</dimen>
  7     <dimen name="large_label_margin">8dp</dimen>
  8     <dimen name="large_dash_margin">35dp</dimen>

../../src/main/res/values/dimens.xml:6: The resource R.dimen.large_6_margin appears to be unused

  3     <dimen name="titleTextSize">21sp</dimen>
  4     <dimen name="buttonHeight">55dp</dimen>
  5     <dimen name="large_32_margin">32dp</dimen>
  6     <dimen name="large_6_margin">50dp</dimen>                                                       
  7     <dimen name="large_label_margin">8dp</dimen>
  8     <dimen name="large_dash_margin">35dp</dimen>
  9     <dimen name="message_height_min">48dp</dimen>

../../src/main/res/values/dimens.xml:7: The resource R.dimen.large_label_margin appears to be unused

  4     <dimen name="buttonHeight">55dp</dimen>
  5     <dimen name="large_32_margin">32dp</dimen>
  6     <dimen name="large_6_margin">50dp</dimen>
  7     <dimen name="large_label_margin">8dp</dimen>                                                    
  8     <dimen name="large_dash_margin">35dp</dimen>
  9     <dimen name="message_height_min">48dp</dimen>
 10     <dimen name="message_bubble_min_height">25dp</dimen>

../../src/main/res/values/dimens.xml:8: The resource R.dimen.large_dash_margin appears to be unused

  5     <dimen name="large_32_margin">32dp</dimen>
  6     <dimen name="large_6_margin">50dp</dimen>
  7     <dimen name="large_label_margin">8dp</dimen>
  8     <dimen name="large_dash_margin">35dp</dimen>                                                    
  9     <dimen name="message_height_min">48dp</dimen>
 10     <dimen name="message_bubble_min_height">25dp</dimen>
 11     <dimen name="chat_bubble_left_margin">16dp</dimen>

../../src/main/res/values/dimens.xml:9: The resource R.dimen.message_height_min appears to be unused

  6     <dimen name="large_6_margin">50dp</dimen>
  7     <dimen name="large_label_margin">8dp</dimen>
  8     <dimen name="large_dash_margin">35dp</dimen>
  9     <dimen name="message_height_min">48dp</dimen>                                                   
 10     <dimen name="message_bubble_min_height">25dp</dimen>
 11     <dimen name="chat_bubble_left_margin">16dp</dimen>
 12     <dimen name="chat_bubble_right_margin">32dp</dimen>

../../src/main/res/values/dimens.xml:10: The resource R.dimen.message_bubble_min_height appears to be unused

  7     <dimen name="large_label_margin">8dp</dimen>
  8     <dimen name="large_dash_margin">35dp</dimen>
  9     <dimen name="message_height_min">48dp</dimen>
 10     <dimen name="message_bubble_min_height">25dp</dimen>                                            
 11     <dimen name="chat_bubble_left_margin">16dp</dimen>
 12     <dimen name="chat_bubble_right_margin">32dp</dimen>
 13     <dimen name="chat_message_padding">12dp</dimen>

../../src/main/res/values/dimens.xml:11: The resource R.dimen.chat_bubble_left_margin appears to be unused

  8     <dimen name="large_dash_margin">35dp</dimen>
  9     <dimen name="message_height_min">48dp</dimen>
 10     <dimen name="message_bubble_min_height">25dp</dimen>
 11     <dimen name="chat_bubble_left_margin">16dp</dimen>                                              
 12     <dimen name="chat_bubble_right_margin">32dp</dimen>
 13     <dimen name="chat_message_padding">12dp</dimen>
 14     <dimen name="chat_bubble_top_margin">16dp</dimen>

../../src/main/res/values/dimens.xml:12: The resource R.dimen.chat_bubble_right_margin appears to be unused

  9     <dimen name="message_height_min">48dp</dimen>
 10     <dimen name="message_bubble_min_height">25dp</dimen>
 11     <dimen name="chat_bubble_left_margin">16dp</dimen>
 12     <dimen name="chat_bubble_right_margin">32dp</dimen>                                             
 13     <dimen name="chat_message_padding">12dp</dimen>
 14     <dimen name="chat_bubble_top_margin">16dp</dimen>
 15 </resources>

../../src/main/res/values/dimens.xml:13: The resource R.dimen.chat_message_padding appears to be unused

 10     <dimen name="message_bubble_min_height">25dp</dimen>
 11     <dimen name="chat_bubble_left_margin">16dp</dimen>
 12     <dimen name="chat_bubble_right_margin">32dp</dimen>
 13     <dimen name="chat_message_padding">12dp</dimen>                                                 
 14     <dimen name="chat_bubble_top_margin">16dp</dimen>
 15 </resources>

../../src/main/res/values/dimens.xml:14: The resource R.dimen.chat_bubble_top_margin appears to be unused

 11     <dimen name="chat_bubble_left_margin">16dp</dimen>
 12     <dimen name="chat_bubble_right_margin">32dp</dimen>
 13     <dimen name="chat_message_padding">12dp</dimen>
 14     <dimen name="chat_bubble_top_margin">16dp</dimen>                                               
 15 </resources>

../../src/main/res/drawable-xhdpi/ic_circle_connected.png: The resource R.drawable.ic_circle_connected appears to be unused

xhdpi	xxhdpi	xxxhdpi

../../src/main/res/drawable-xhdpi/ic_circle_connecting.png: The resource R.drawable.ic_circle_connecting appears to be unused

xhdpi	xxhdpi	xxxhdpi

../../src/main/res/drawable-xhdpi/ic_circle_red.png: The resource R.drawable.ic_circle_red appears to be unused

xhdpi	xxhdpi	xxxhdpi

../../src/main/res/drawable-xhdpi/ic_send.png: The resource R.drawable.ic_send appears to be unused

xhdpi	xxhdpi	xxxhdpi

../../src/main/res/drawable-xhdpi/ic_send_depri.png: The resource R.drawable.ic_send_depri appears to be unused

xhdpi	xxhdpi	xxxhdpi

../../src/main/res/navigation/nav_graph.xml:2: The resource R.navigation.nav_graph appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <navigation xmlns:android="http://schemas.android.com/apk/res/android"                              
  3     xmlns:app="http://schemas.android.com/apk/res-auto"
  4     xmlns:tools="http://schemas.android.com/tools"
  5     android:id="@+id/nav_graph"

../../src/main/res/layout/received_layout.xml:2: The resource R.layout.received_layout appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"                          
  3     android:layout_width="wrap_content"
  4     android:layout_height="wrap_content"
  5     android:layout_marginEnd="@dimen/chat_bubble_right_margin"

../../src/main/res/layout/recycler_view_item.xml:2: The resource R.layout.recycler_view_item appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"                            
  3               xmlns:tools="http://schemas.android.com/tools"
  4               android:orientation="vertical"
  5               android:padding="8dp"

../../src/main/res/layout/recyclerview_single_item.xml:2: The resource R.layout.recyclerview_single_item appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"                            
  3     android:layout_width="match_parent"
  4     android:layout_height="wrap_content"
  5     android:background="?attr/selectableItemBackground"

../../src/main/res/drawable/rounded_background.xml:2: The resource R.drawable.rounded_background appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <shape xmlns:android="http://schemas.android.com/apk/res/android">                                  
  3     <solid android:color="#FFFFFF" />
  4     <stroke
  5         android:width="2dp"

../../src/main/res/drawable/rounded_chat_received_background.xml:2: The resource R.drawable.rounded_chat_received_background appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <shape xmlns:android="http://schemas.android.com/apk/res/android">                                  
  3     <solid android:color="@color/colorAccent" />
  4     <stroke
  5         android:width="2dip"

../../src/main/res/drawable/rounded_chat_sent_background.xml:2: The resource R.drawable.rounded_chat_sent_background appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <shape xmlns:android="http://schemas.android.com/apk/res/android">                                  
  3     <solid android:color="@color/white" />
  4     <stroke
  5         android:width="1dip"

../../src/main/res/drawable-v21/selectable_background.xml:2: The resource R.drawable.selectable_background appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <ripple xmlns:android="http://schemas.android.com/apk/res/android"                                  
  3     android:color="@color/colorAccent">
  4     <item android:id="@android:id/mask">
  5         <shape android:shape="rectangle">

../../src/main/res/drawable-v21/selectable_background_rounded.xml:2: The resource R.drawable.selectable_background_rounded appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <ripple xmlns:android="http://schemas.android.com/apk/res/android"                                  
  3     android:color="@color/colorAccent">
  4     <item android:id="@android:id/mask">
  5         <shape android:shape="oval">

../../src/main/res/layout/sent_layout.xml:2: The resource R.layout.sent_layout appears to be unused

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <RelativeLayout                                                                                     
  3     xmlns:android="http://schemas.android.com/apk/res/android"
  4     android:orientation="vertical"
  5     android:layout_width="match_parent"

NOTE: 28 results omitted.

UnusedResources Performance Warning Priority 3/10

Missing density folder

../../src/main/res: Missing density variation folders in src/main/res: drawable-hdpi, drawable-mdpi

Icons will look best if a custom version is provided for each of the major screen density classes (low, medium, high, extra-high, extra-extra-high). This lint check identifies folders which are missing, such as drawable-hdpi.

Low density is not really used much anymore, so this check ignores the ldpi density. To force lint to include it, set the environment variable ANDROID_LINT_INCLUDE_LDPI=true. For more information on current density usage, see https://developer.android.com/about/dashboards

More info: https://developer.android.com/guide/practices/screens_support.html

To suppress this error, use the issue id "IconMissingDensityFolder" as explained in the Suppressing Warnings and Errors section.

IconMissingDensityFolder Icons Usability Warning Priority 3/10

KTX Extension Available

../../build.gradle:36: Add suffix -ktx to enable the Kotlin extensions for this library

 33     implementation 'androidx.appcompat:appcompat:1.0.0'
 34     implementation 'com.google.android.material:material:1.0.0'
 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'                             
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'

../../build.gradle:37: Add suffix -ktx to enable the Kotlin extensions for this library

 34     implementation 'com.google.android.material:material:1.0.0'
 35     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 36     implementation 'androidx.navigation:navigation-fragment:2.0.0-rc02'
 37     implementation 'androidx.navigation:navigation-ui:2.0.0-rc02'                                   
 38     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
 39     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 40     compileOnly 'org.projectlombok:lombok:1.18.20'

Android KTX extensions augment some libraries with support for modern Kotlin language features like extension functions, extension properties, lambdas, named parameters, coroutines, and more.

In Kotlin projects, use the KTX version of a library by replacing the dependency in your build.gradle file. For example, you can replace androidx.fragment:fragment with androidx.fragment:fragment-ktx.

More info: https://developer.android.com/kotlin/ktx

To suppress this error, use the issue id "KtxExtensionAvailable" as explained in the Suppressing Warnings and Errors section.

KtxExtensionAvailable Productivity Information Priority 4/10

Image without contentDescription

../../src/main/res/layout/chat_fragment.xml:64: Empty contentDescription attribute on image

 61                 android:layout_width="32dp"
 62                 android:layout_height="32dp"
 63                 android:layout_gravity="center"
 64                 android:contentDescription="TODO"                                                   
 65                 android:src="@drawable/ic_send_depri" />
 66 
 67         </FrameLayout>

Non-textual widgets like ImageViews and ImageButtons should use the contentDescription attribute to specify a textual description of the widget such that screen readers and other accessibility tools can adequately describe the user interface.

Note that elements in application screens that are purely decorative and do not provide any content or enable a user action should not have accessibility content descriptions. In this case, just suppress the lint warning with a tools:ignore="ContentDescription" attribute.

Note that for text fields, you should not set both the hint and the contentDescription attributes since the hint will never be shown. Just set the hint. See https://developer.android.com/guide/topics/ui/accessibility/apps#special-cases
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "ContentDescription" as explained in the Suppressing Warnings and Errors section.

ContentDescription Accessibility Warning Priority 3/10

Hardcoded text

../../src/main/res/layout/chat_fragment.xml:40: Hardcoded string "Escreva algo...", should use @string resource

 37                 android:layout_marginEnd="60dp"
 38                 android:layout_weight="5"
 39                 android:background="#00FFFFFF"
 40                 android:hint="Escreva algo..."                                                      
 41                 android:inputType="textLongMessage"
 42                 android:textColorHint="#BDBDBD"
 43                 android:textSize="15sp"

../../src/main/res/layout/chat_fragment.xml:64: Hardcoded string "TODO", should use @string resource

 61                 android:layout_width="32dp"
 62                 android:layout_height="32dp"
 63                 android:layout_gravity="center"
 64                 android:contentDescription="TODO"                                                   
 65                 android:src="@drawable/ic_send_depri" />
 66 
 67         </FrameLayout>

../../src/main/res/layout/fragment_first.xml:13: Hardcoded string " ", should use @string resource

 10         android:id="@+id/textview_first"
 11         android:layout_width="wrap_content"
 12         android:layout_height="wrap_content"
 13         android:text=" "                                                                            
 14         app:layout_constraintBottom_toTopOf="@id/button_first"
 15         app:layout_constraintEnd_toEndOf="parent"
 16         app:layout_constraintStart_toStartOf="parent"

HardcodedText Internationalization Warning Priority 5/10

Disabled Checks

One or more issues were not run by lint, either because the check is not enabled by default, or because it was disabled with a command line flag or via one or more lint.xml configuration files in the project directories.

AppLinksAutoVerifyError

Disabled By: Default

Ensures that app links are correctly set and associated with website.

More info: https://g.co/appindexing/applinks

To suppress this error, use the issue id "AppLinksAutoVerifyError" as explained in the Suppressing Warnings and Errors section.

AppLinksAutoVerifyWarning

Disabled By: Default

Ensures that app links are correctly set and associated with website.

More info: https://g.co/appindexing/applinks

To suppress this error, use the issue id "AppLinksAutoVerifyWarning" as explained in the Suppressing Warnings and Errors section.

BackButton

Disabled By: Default

According to the Android Design Guide,

"Other platforms use an explicit back button with label to allow the user to navigate up the application's hierarchy. Instead, Android uses the main action bar's app icon for hierarchical navigation and the navigation bar's back button for temporal navigation."
This check is not very sophisticated (it just looks for buttons with the label "Back"), so it is disabled by default to not trigger on common scenarios like pairs of Back/Next buttons to paginate through screens.

More info: https://material.io/design/

To suppress this error, use the issue id "BackButton" as explained in the Suppressing Warnings and Errors section.

ConvertToWebp

Disabled By: Default

The WebP format is typically more compact than PNG and JPEG. As of Android 4.2.1 it supports transparency and lossless conversion as well. Note that there is a quickfix in the IDE which lets you perform conversion.

Launcher icons must be in the PNG format.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "ConvertToWebp" as explained in the Suppressing Warnings and Errors section.

DalvikOverride

Disabled By: Default

The Dalvik virtual machine will treat a package private method in one class as overriding a package private method in its super class, even if they are in separate packages.

If you really did intend for this method to override the other, make the method protected instead.

If you did not intend the override, consider making the method private, or changing its name or signature.

Note that this check is disabled be default, because ART (the successor to Dalvik) no longer has this behavior.
To suppress this error, use the issue id "DalvikOverride" as explained in the Suppressing Warnings and Errors section.

DuplicateStrings

Disabled By: Default

Duplicate strings can make applications larger unnecessarily.

This lint check looks for duplicate strings, including differences for strings where the only difference is in capitalization. Title casing and all uppercase can all be adjusted in the layout or in code.

More info: https://developer.android.com/reference/android/widget/TextView.html#attr_android:inputType

To suppress this error, use the issue id "DuplicateStrings" as explained in the Suppressing Warnings and Errors section.

EasterEgg

Disabled By: Default

An "easter egg" is code deliberately hidden in the code, both from potential users and even from other developers. This lint check looks for code which looks like it may be hidden from sight.
To suppress this error, use the issue id "EasterEgg" as explained in the Suppressing Warnings and Errors section.

ExpensiveAssertion

Disabled By: Default

In Kotlin, assertions are not handled the same way as from the Java programming language. In particular, they're just implemented as a library call, and inside the library call the error is only thrown if assertions are enabled.

This means that the arguments to the assert call will always be evaluated. If you're doing any computation in the expression being asserted, that computation will unconditionally be performed whether or not assertions are turned on. This typically turns into wasted work in release builds.

This check looks for cases where the assertion condition is nontrivial, e.g. it is performing method calls or doing more work than simple comparisons on local variables or fields.

You can work around this by writing your own inline assert method instead:

@Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
inline fun assert(condition: () -> Boolean) {
    if (_Assertions.ENABLED && !condition()) {
        throw AssertionError()
    }
}

In Android, because assertions are not enforced at runtime, instead use this:

inline fun assert(condition: () -> Boolean) {
    if (BuildConfig.DEBUG && !condition()) {
        throw AssertionError()
    }
}

To suppress this error, use the issue id "ExpensiveAssertion" as explained in the Suppressing Warnings and Errors section.

FieldGetter

Disabled By: Default

Accessing a field within the class that defines a getter for that field is at least 3 times faster than calling the getter. For simple getters that do nothing other than return the field, you might want to just reference the local field directly instead.

NOTE: As of Android 2.3 (Gingerbread), this optimization is performed automatically by Dalvik, so there is no need to change your code; this is only relevant if you are targeting older versions of Android.

More info: https://developer.android.com/training/articles/perf-tips#internal_get_set

To suppress this error, use the issue id "FieldGetter" as explained in the Suppressing Warnings and Errors section.

GoogleAppIndexingApiWarning

Disabled By: Default

Adds URLs to get your app into the Google index, to get installs and traffic to your app from Google Search.

More info: https://g.co/AppIndexing/AndroidStudio

Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "GoogleAppIndexingApiWarning" as explained in the Suppressing Warnings and Errors section.

GoogleAppIndexingWarning

Disabled By: Default

Adds URLs to get your app into the Google index, to get installs and traffic to your app from Google Search.

More info: https://g.co/AppIndexing/AndroidStudio

Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "GoogleAppIndexingWarning" as explained in the Suppressing Warnings and Errors section.

IconExpectedSize

Disabled By: Default

There are predefined sizes (for each density) for launcher icons. You should follow these conventions to make sure your icons fit in with the overall look of the platform.

More info: https://material.io/design/iconography/

To suppress this error, use the issue id "IconExpectedSize" as explained in the Suppressing Warnings and Errors section.

ImplicitSamInstance

Disabled By: Default

Kotlin's support for SAM (single accessor method) interfaces lets you pass a lambda to the interface. This will create a new instance on the fly even though there is no explicit constructor call. If you pass one of these lambdas or method references into a method which (for example) stores or compares the object identity, unexpected results may happen.
To suppress this error, use the issue id "ImplicitSamInstance" as explained in the Suppressing Warnings and Errors section.

InvalidPackage

Disabled By: Default

This check scans through libraries looking for calls to APIs that are not included in Android.

When you create Android projects, the classpath is set up such that you can only access classes in the API packages that are included in Android. However, if you add other projects to your libs/ folder, there is no guarantee that those .jar files were built with an Android specific classpath, and in particular, they could be accessing unsupported APIs such as java.applet.

This check scans through library jars and looks for references to API packages that are not included in Android and flags these. This is only an error if your code calls one of the library classes which wind up referencing the unsupported package.
To suppress this error, use the issue id "InvalidPackage" as explained in the Suppressing Warnings and Errors section.

KotlinPropertyAccess

Disabled By: Default

For a method to be represented as a property in Kotlin, strict “bean”-style prefixing must be used.

Accessor methods require a ‘get’ prefix or for boolean-returning methods an ‘is’ prefix can be used.

More info: https://android.github.io/kotlin-guides/interop.html#property-prefixes

To suppress this error, use the issue id "KotlinPropertyAccess" as explained in the Suppressing Warnings and Errors section.

LambdaLast

Disabled By: Default

To improve calling this code from Kotlin,
parameter types eligible for SAM conversion should be last.

More info: https://android.github.io/kotlin-guides/interop.html#lambda-parameters-last

To suppress this error, use the issue id "LambdaLast" as explained in the Suppressing Warnings and Errors section.

LintImplPsiEquals

Disabled By: Default

You should never compare two PSI elements for equality with equals;
use isEquivalentTo(PsiElement) instead.
To suppress this error, use the issue id "LintImplPsiEquals" as explained in the Suppressing Warnings and Errors section.

LintImplUnexpectedDomain

Disabled By: Default

This checks flags URLs to domains that have not been explicitly whitelisted for use as a documentation source.
To suppress this error, use the issue id "LintImplUnexpectedDomain" as explained in the Suppressing Warnings and Errors section.

LogConditional

Disabled By: Default

The BuildConfig class provides a constant, DEBUG, which indicates whether the code is being built in release mode or in debug mode. In release mode, you typically want to strip out all the logging calls. Since the compiler will automatically remove all code which is inside a if (false) check, surrounding your logging calls with a check for BuildConfig.DEBUG is a good idea.

If you really intend for the logging to be present in release mode, you can suppress this warning with a @SuppressLint annotation for the intentional logging calls.
To suppress this error, use the issue id "LogConditional" as explained in the Suppressing Warnings and Errors section.

MangledCRLF

Disabled By: Default

On Windows, line endings are typically recorded as carriage return plus newline: \r\n.

This detector looks for invalid line endings with repeated carriage return characters (without newlines). Previous versions of the ADT plugin could accidentally introduce these into the file, and when editing the file, the editor could produce confusing visual artifacts.

More info: https://bugs.eclipse.org/bugs/show_bug.cgi?id=375421

To suppress this error, use the issue id "MangledCRLF" as explained in the Suppressing Warnings and Errors section.

MinSdkTooLow

Disabled By: Default

The value of the minSdkVersion property is too low and can be incremented without noticeably reducing the number of supported devices.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "MinSdkTooLow" as explained in the Suppressing Warnings and Errors section.

NegativeMargin

Disabled By: Default

Margin values should be positive. Negative values are generally a sign that you are making assumptions about views surrounding the current one, or may be tempted to turn off child clipping to allow a view to escape its parent. Turning off child clipping to do this not only leads to poor graphical performance, it also results in wrong touch event handling since touch events are based strictly on a chain of parent-rect hit tests. Finally, making assumptions about the size of strings can lead to localization problems.
To suppress this error, use the issue id "NegativeMargin" as explained in the Suppressing Warnings and Errors section.

NewerVersionAvailable

Disabled By: Default

This detector checks with a central repository to see if there are newer versions available for the dependencies used by this project. This is similar to the GradleDependency check, which checks for newer versions available in the Android SDK tools and libraries, but this works with any MavenCentral dependency, and connects to the library every time, which makes it more flexible but also much slower.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "NewerVersionAvailable" as explained in the Suppressing Warnings and Errors section.

NoHardKeywords

Disabled By: Default

Do not use Kotlin’s hard keywords as the name of methods or fields.
These require the use of backticks to escape when calling from Kotlin.
Soft keywords, modifier keywords, and special identifiers are allowed.

For example, Mockito’s when function requires backticks when used from Kotlin:

val callable = Mockito.mock(Callable::class.java)
Mockito.`when`(callable.call()).thenReturn(/* … */)

More info: https://android.github.io/kotlin-guides/interop.html#no-hard-keywords

To suppress this error, use the issue id "NoHardKeywords" as explained in the Suppressing Warnings and Errors section.

PermissionImpliesUnsupportedChromeOsHardware

Disabled By: Default

The <uses-permission> element should not require a permission that implies an unsupported Chrome OS hardware feature. Google Play assumes that certain hardware related permissions indicate that the underlying hardware features are required by default. To fix the issue, consider declaring the corresponding uses-feature element with required="false" attribute.

More info: https://developer.android.com/topic/arc/manifest.html#implied-features

Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "PermissionImpliesUnsupportedChromeOsHardware" as explained in the Suppressing Warnings and Errors section.

Registered

Disabled By: Default

Activities, services and content providers should be registered in the AndroidManifest.xml file using <activity>, <service> and <provider> tags.

If your activity is simply a parent class intended to be subclassed by other "real" activities, make it an abstract class.

More info: https://developer.android.com/guide/topics/manifest/manifest-intro.html

To suppress this error, use the issue id "Registered" as explained in the Suppressing Warnings and Errors section.

RequiredSize

Disabled By: Default

All views must specify an explicit layout_width and layout_height attribute. There is a runtime check for this, so if you fail to specify a size, an exception is thrown at runtime.

It's possible to specify these widths via styles as well. GridLayout, as a special case, does not require you to specify a size.
To suppress this error, use the issue id "RequiredSize" as explained in the Suppressing Warnings and Errors section.

SelectableText

Disabled By: Default

If a <TextView> is used to display data, the user might want to copy that data and paste it elsewhere. To allow this, the <TextView> should specify android:textIsSelectable="true".

This lint check looks for TextViews which are likely to be displaying data: views whose text is set dynamically. This value will be ignored on platforms older than API 11, so it is okay to set it regardless of your minSdkVersion.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "SelectableText" as explained in the Suppressing Warnings and Errors section.

StopShip

Disabled By: Default

Using the comment // STOPSHIP can be used to flag code that is incomplete but checked in. This comment marker can be used to indicate that the code should not be shipped until the issue is addressed, and lint will look for these. In Gradle projects, this is only checked for non-debug (release) builds.

In Kotlin, the TODO() method is also treated as a stop ship marker; you can use it to make incomplete code compile, but it will throw an exception at runtime and therefore should be fixed before shipping releases.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "StopShip" as explained in the Suppressing Warnings and Errors section.

SyntheticAccessor

Disabled By: Default

A private inner class which is accessed from the outer class will force the compiler to insert a synthetic accessor; this means that you are causing extra overhead. This is not important in small projects, but is important for large apps running up against the 64K method handle limit, and especially for libraries where you want to make sure your library is as small as possible for the cases where your library is used in an app running up against the 64K limit.
To suppress this error, use the issue id "SyntheticAccessor" as explained in the Suppressing Warnings and Errors section.

TypographyQuotes

Disabled By: Default

Straight single quotes and double quotes, when used as a pair, can be replaced by "curvy quotes" (or directional quotes). This can make the text more readable.

Note that you should never use grave accents and apostrophes to quote, `like this'.

(Also note that you should not use curvy quotes for code fragments.)

More info: https://en.wikipedia.org/wiki/Quotation_mark

Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "TypographyQuotes" as explained in the Suppressing Warnings and Errors section.

UnknownNullness

Disabled By: Default

To improve referencing this code from Kotlin, consider adding
explicit nullness information here with either @NonNull or @Nullable.

You can set the environment variable
ANDROID_LINT_NULLNESS_IGNORE_DEPRECATED=true
if you want lint to ignore classes and members that have been annotated with
@Deprecated.

More info: https://android.github.io/kotlin-guides/interop.html#nullability-annotations

To suppress this error, use the issue id "UnknownNullness" as explained in the Suppressing Warnings and Errors section.

UnpackedNativeCode

Disabled By: Default

This app loads native libraries using System.loadLibrary().

Consider adding android:extractNativeLibs="false" to the <application> tag in AndroidManifest.xml. Starting with Android 6.0, this will make installation faster, the app will take up less space on the device and updates will have smaller download sizes.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "UnpackedNativeCode" as explained in the Suppressing Warnings and Errors section.

UnsupportedChromeOsHardware

Disabled By: Default

The <uses-feature> element should not require this unsupported Chrome OS hardware feature. Any uses-feature not explicitly marked with required="false" is necessary on the device to be installed on. Ensure that any features that might prevent it from being installed on a Chrome OS device are reviewed and marked as not required in the manifest.

More info: https://developer.android.com/topic/arc/manifest.html#incompat-entries

Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "UnsupportedChromeOsHardware" as explained in the Suppressing Warnings and Errors section.

UnusedIds

Disabled By: Default

This resource id definition appears not to be needed since it is not referenced from anywhere. Having id definitions, even if unused, is not necessarily a bad idea since they make working on layouts and menus easier, so there is not a strong reason to delete these.

The unused resource check can ignore tests. If you want to include resources that are only referenced from tests, consider packaging them in a test source set instead.

You can include test sources in the unused resource check by setting the system property lint.unused-resources.include-tests=true, and to exclude them (usually for performance reasons), use lint.unused-resources.exclude-tests=true.
Note: This issue has an associated quickfix operation in Android Studio and IntelliJ IDEA.
To suppress this error, use the issue id "UnusedIds" as explained in the Suppressing Warnings and Errors section.

ValidActionsXml

Disabled By: Default

Ensures that an actions XML file is properly formed
To suppress this error, use the issue id "ValidActionsXml" as explained in the Suppressing Warnings and Errors section.

WrongThreadInterprocedural

Disabled By: Default

Searches for interprocedural call paths that violate thread annotations in the program. Tracks the flow of instantiated types and lambda expressions to increase accuracy across method boundaries.

More info: https://developer.android.com/guide/components/processes-and-threads.html#Threads

To suppress this error, use the issue id "WrongThreadInterprocedural" as explained in the Suppressing Warnings and Errors section.

Suppressing Warnings and Errors

Lint errors can be suppressed in a variety of ways:

1. With a @SuppressLint annotation in the Java code
2. With a tools:ignore attribute in the XML file
3. With a //noinspection comment in the source code
4. With ignore flags specified in the build.gradle file, as explained below
5. With a lint.xml configuration file in the project
6. With a lint.xml configuration file passed to lint via the --config flag
7. With the --ignore flag passed to lint.

To suppress a lint warning with an annotation, add a @SuppressLint("id") annotation on the class, method or variable declaration closest to the warning instance you want to disable. The id can be one or more issue id's, such as "UnusedResources" or {"UnusedResources","UnusedIds"}, or it can be "all" to suppress all lint warnings in the given scope.

To suppress a lint warning with a comment, add a //noinspection id comment on the line before the statement with the error.

To suppress a lint warning in an XML file, add a tools:ignore="id" attribute on the element containing the error, or one of its surrounding elements. You also need to define the namespace for the tools prefix on the root element in your document, next to the xmlns:android declaration:
xmlns:tools="http://schemas.android.com/tools"

To suppress a lint warning in a build.gradle file, add a section like this:

android {
    lintOptions {
        disable 'TypographyFractions','TypographyQuotes'
    }
}

Here we specify a comma separated list of issue id's after the disable command. You can also use warning or error instead of disable to change the severity of issues.

To suppress lint warnings with a configuration XML file, create a file named lint.xml and place it at the root directory of the module in which it applies.

The format of the lint.xml file is something like the following:

<?xml version="1.0" encoding="UTF-8"?>
<lint>
    <!-- Ignore everything in the test source set -->
    <issue id="all">
        <ignore path="\*/test/\*" />
    </issue>

    <!-- Disable this given check in this project -->
    <issue id="IconMissingDensityFolder" severity="ignore" />

    <!-- Ignore the ObsoleteLayoutParam issue in the given files -->
    <issue id="ObsoleteLayoutParam">
        <ignore path="res/layout/activation.xml" />
        <ignore path="res/layout-xlarge/activation.xml" />
        <ignore regexp="(foo|bar)\.java" />
    </issue>

    <!-- Ignore the UselessLeaf issue in the given file -->
    <issue id="UselessLeaf">
        <ignore path="res/layout/main.xml" />
    </issue>

    <!-- Change the severity of hardcoded strings to "error" -->
    <issue id="HardcodedText" severity="error" />
</lint>

To suppress lint checks from the command line, pass the --ignore flag with a comma separated list of ids to be suppressed, such as:
$ lint --ignore UnusedResources,UselessLeaf /my/project/path

For more information, see https://developer.android.com/studio/write/lint.html#config