How can I detect user pressing Home button in Android

  I have used below code. But its not working.

@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		switch (keyCode) {
		case KeyEvent.KEYCODE_HOME:		

Toast.makeText(getApplicationContext(), "Home button pressed", Toast.LENGTH_SHORT).show();

			return true;		
		}
		return super.onKeyDown(keyCode, event);
	}
Last updated:12/9/2015 10:03:00 PM

1 Answers

Manoj Pandey
Manoj Pandey

The Home button is a very dangerous button to override and, because of that, Android will not let you override its behavior the same way you do the BACK button.

Use below code to find home button press.

Create class HomeWatcher class.

package com.example.test;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;

public class HomeWatcher {

	static final String TAG = "hg";
	private Context mContext;
	private IntentFilter mFilter;
	private OnHomePressedListener mListener;
	private InnerRecevier mRecevier;

	public HomeWatcher(Context context) {
		mContext = context;
		mFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
	}

	public void setOnHomePressedListener(OnHomePressedListener listener) {
		mListener = listener;
		mRecevier = new InnerRecevier();
	}

	public void startWatch() {
		if (mRecevier != null) {
			mContext.registerReceiver(mRecevier, mFilter);
		}
	}

	public void stopWatch() {
		if (mRecevier != null) {
			mContext.unregisterReceiver(mRecevier);
		}
	}

	class InnerRecevier extends BroadcastReceiver {
	final String SYSTEM_DIALOG_REASON_KEY = "reason";
	final String SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS = "globalactions";
	final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";
	final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";

		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();
			if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
		String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
		if (reason != null) {
			Log.e(TAG, "action:" + action + ",reason:" + reason);
				if (mListener != null) {
		if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
					mListener.onHomePressed();
		} else if (reason.equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {
					mListener.onHomeLongPressed();
						}
					}
				}
			}
		}
	}

	public interface OnHomePressedListener {
		public void onHomePressed();

		public void onHomeLongPressed();
	}
}

Now call on your activity


HomeWatcher mHomeWatcher = new HomeWatcher(this);
mHomeWatcher.setOnHomePressedListener(new OnHomePressedListener() {
			@Override
			public void onHomePressed() {
				// do something here...
				
			}

			@Override
			public void onHomeLongPressed() {
			}
		});
		mHomeWatcher.startWatch();


Answer