Remove app from recent apps programmatically

Add New Activity:

 public class ExitActivity extends Activity{  
   @Override protected void onCreate(Bundle savedInstanceState){  
     super.onCreate(savedInstanceState);  
     if(android.os.Build.VERSION.SDK_INT >= 21){  
       finishAndRemoveTask();  
     }  
     else{  
       finish();  
     }  
   }  
   public static void exitApplicationAnRemoveFromRecent(Context mContext){  
     Intent intent = new Intent(mContext, ExitActivity.class);  
     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS | Intent.FLAG_ACTIVITY_NO_ANIMATION);  
     mContext.startActivity(intent);  
   }  
 }  

Now exit from other Activity:

 @Override  
 public void onBackPressed() {  
  ExitActivity.exitApplicationAnRemoveFromRecent(mContext);  
  super.onBackPressed();  
 }  

Disclaimer: Hiren Patel (http://stackoverflow.com/questions/13385289/remove-app-from-recent-apps-programmatically)