getActionBar returns null

[AmirF194]

Hi, Please help me ! I run this code in other app it work fine but i add some library in my project i get this "Unfortunately,app has stopped"

final ActionBar mActionBar =getSupportActionBar(); assert mActionBar != null; // it crash here mActionBar.setDisplayShowHomeEnabled(false); mActionBar.setDisplayShowTitleEnabled(false); LayoutInflater mInflater = LayoutInflater.from(this); final View actionBar = mInflater.inflate(R.layout.main, null); mActionBar.setCustomView(actionBar); mActionBar.setDisplayShowCustomEnabled(true); ((Toolbar) actionBar.getParent()).setContentInsetsAbsolute(0, 0); final BoomMenuButton leftBmb = (BoomMenuButton) actionBar.findViewById(R.id.action_bar_left_bmb); leftBmb.setButtonEnum(ButtonEnum.Ham); leftBmb.setAutoBoom(true); leftBmb.setAutoHide(true); leftBmb.setDelay(100); leftBmb.setHideDelay(200); leftBmb.setPiecePlaceEnum(PiecePlaceEnum.HAM_6); leftBmb.setButtonPlaceEnum(ButtonPlaceEnum.HAM_6);

10-11 13:58:25.971 16433-16433/com.example.sharif.boomtest E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.sharif.boomtest, PID: 16433 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.sharif.boomtest/com.example.sharif.boomtest.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3320) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3416) at android.app.ActivityThread.access$1100(ActivityThread.java:230) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1822) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:7409) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object reference at com.example.sharif.boomtest.MainActivity.StartingMenu(MainActivity.java:82) at com.example.sharif.boomtest.MainActivity.onCreate(MainActivity.java:77) at android.app.Activity.performCreate(Activity.java:6904) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3267) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3416)  at android.app.ActivityThread.access$1100(ActivityThread.java:230)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1822)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:148)  at android.app.ActivityThread.main(ActivityThread.java:7409)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 

[gcantoni]

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