Error:(3, 30) error: package android.support.v7.app does not exist
Error:(10, 31) error: package android.support.v4.view does not exist
Error:(13, 35) error: cannot find symbol class ActionBarActivity
Error:(17, 13) error: cannot find symbol class GestureDetectorCompat
Error:(21, 9) error: cannot find symbol variable super
Error:(22, 9) error: cannot find symbol method setContentView(int)
Error:(24, 35) error: cannot find symbol method findViewById(int)
Error:(25, 36) error: cannot find symbol class GestureDetectorCompat
Error:(19, 5) error: method does not override or implement a method from a supertype
Error:(88, 16) error: cannot find symbol variable super
Error:(85, 5) error: method does not override or implement a method from a supertype
Error:(94, 9) error: cannot find symbol method getMenuInflater()
Error:(91, 5) error: method does not override or implement a method from a supertype
Error:(110, 16) error: cannot find symbol variable super
Error:(98, 5) error: method does not override or implement a method from a supertype
Error:Execution failed for task ':app:compileDebugJava'.

> Compilation failed; see the compiler error output for details.
Please help.