To build TalkBack sources you will need: 1) Download android sdk from https://developer.android.com/sdk/installing/index.html?pkg=tools 2) Set ANDROID_HOME to the path of Android sdk folder 3) Open Android SDK manager and install - Tools/Android SDK Build-tools 22.0.1 - Android 6.0 (API 23) - Extras/Android Support Repository - Extras/Google Repository TalkBack uses gradle as build system. Here are commands to build, install and test the project from command line: 1) Assemble debug and release apks: ./gradlew assemble 2) Assemble only debug apk: ./gradlew assembleDebug 3) Install debug apk on connected device: ./gradlew installDebug 4) Run instrumentation tests: ./gradlew instrumentationTest 5) Run robolectric tests: ./gradlew test