Create android unit test for android app

• Locate the class you wish to test, press Shift + Ctrl + T.
• In the newly shown menu, choose Create New Test.
• In Test library , choose JUnit 4.
• Name the Class name.
• Press OK.
• Choose destination directory, such as app\src\androidTest\....
• Press OK.
• Remove possible unnecessary newly generated directories.
• In app level build.gradle , such as app\build.gradle, add necessary dependencies. Such as:

    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:23.1.0'
    compile 'com.android.support:support-annotations:23.1.1'
    testCompile 'junit:junit:4.12'
    androidTestCompile 'com.android.support:support-annotations:23.1.1'
    androidTestCompile 'com.android.support.test:runner:0.5'
    androidTestCompile 'com.android.support.test:rules:0.5'
    androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'

• Solve possible dependency conflicts.
• In the newly created java test file, Alt + Insert to generate new method automatically.