How to disable the home key

Question

I want to lock the screen. I want to disable the home key and use only the return key. How to do it?

Answer 1

Use this method to disable the Home key in android

@Override public void onAttachedToWindow() { this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); super.onAttachedToWindow(); } 

Answer 2

I found a way to tackle the HOME key. For your application, set the manifest as

 <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.HOME" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.MONKEY"/> 

Your application is now an alternative Launcher application.

Use adb and disable launcher application using package manager

 pm disable com.android.launcher2 

Now pressing the Home key will always remain on one screen.

Answer 3

This solution only works with 3.x.

Well, that should have been a difficult question. But here is a way to crack it.

Cancel the method below in your activity,

 @Override public void onAttachedToWindow() { super.onAttachedToWindow(); this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); } 

And now handle a key event like this,

 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if(keyCode == KeyEvent.KEYCODE_HOME) { Log.i("Home Button","Clicked"); } if(keyCode==KeyEvent.KEYCODE_BACK) { finish(); } return false; } 

Answer 4

Add this code to the MainActivity class:

 Timer timer; MyTimerTask myTimerTask; @Override protected void onResume() { super.onResume(); if (timer != null) { timer.cancel(); timer = null; } } @Override protected void onPause() { if (timer == null) { myTimerTask = new MyTimerTask(); timer = new Timer(); timer.schedule(myTimerTask, 100, 100); } super.onPause(); } private void bringApplicationToFront() { KeyguardManager myKeyManager = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE); if( myKeyManager.inKeyguardRestrictedInputMode()) return; Log.d("TAG", "====Bringging Application to Front===="); Intent notificationIntent = new Intent(this, MainActivity.class); notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP); PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); try { pendingIntent.send(); } catch (PendingIntent.CanceledException e) { e.printStackTrace(); } } public void onBackPressed() { // do not call super onBackPressed. } class MyTimerTask extends TimerTask { @Override public void run() { bringApplicationToFront(); } } 

This is not a lock for the home button, but the user cannot switch to another application for a long time (more than 100 milliseconds), maybe this is what you want.

Answer 5

To disable the home button, try the following:

 @Override public void onAttachedToWindow() { this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); super.onAttachedToWindow(); } 

The problem with the notification bar turned off can be solved by hiding the notification bar, as here:

 public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.xxxx); getWindow().addFlags(LayoutParams.FLAG_FULLSCREEN); .... } 

or set a full-screen theme for your activity or application in the manifest:

 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"