Android

• How to list the avds available on the computer

  $ANDROID_HOME/emulator/emulator -list-avds

• How to start an avd

  $ANDROID_HOME/emulator/emulator -avd <avd-name>

• What is the default location of the develop app built for Android in gradle

  ./build/outputs/apk/develop/debug/app.apk

• What is the default location of the test app (using Espresso)

  ./build/outputs/apk/androidTest/develop/debug/app.apk

• How to run single instrumentation test class (-q is for quiet). For multiple classes, they can be comma-separated

  ./gradlew -q -Pandroid.testInstrumentationRunnerArguments.class=<full classpath>#<test name> <app>:connected<Variant Name>AndroidTest

• How to run a single instrumentation test (-q is for quiet)

  ./gradlew -q -Pandroid.testInstrumentationRunnerArguments.class=<full classpath> <app>:connected<Variant Name>AndroidTest

• How to run an instrumented test using adb

  ./gradlew install<Variant Name>AndroidTest

  adb shell am instrument -w -e class com.example.MyInstrumentationTest#testFoo com.example.test/android.support.test.runner.AndroidJUnitRunner

• How to list all dependencies for an app

  ./gradlew app:dependencies

  For more insights:

  ./gradlew :app:dependencyInsight --configuration compile --dependency <name>

  ./gradlew :app:dependencyInsight --configuration testCompile --dependency <name>

  ./gradlew :app:dependencyInsight --configuration androidTestCompile --dependency <name>

• How to compile and run a dex file directly on an Android phone

  javac <file.java>
  java <classname>
  dx –dex –output=<file.dex> <file.class>
  adb push <file.dex> </data/local/tmp>
  adb shell dalvikvm –cp </data/local/tmp><file.dex> <classname>