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MainActivity如下:

package cn.testhomekey;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.content.IntentFilter;/** * Demo描述: * 利用广播监听设备的HOME和RECENT_APPS键被按下 *  * 参考资料: * http://blog.csdn.net/imyfriend/article/details/8293399 * Thank you very much */public class MainActivity extends Activity {    private HomeKeyBroadcastReceiver mHomeKeyBroadcastReceiver;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);	}    @Override    protected void onStart() {    	super.onStart();    	mHomeKeyBroadcastReceiver=new HomeKeyBroadcastReceiver();    	IntentFilter intentFilter=new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);    	this.registerReceiver(mHomeKeyBroadcastReceiver,intentFilter);    }	@Override	protected void onDestroy() {		if (mHomeKeyBroadcastReceiver!=null) {			this.unregisterReceiver(mHomeKeyBroadcastReceiver);		}		super.onDestroy();	}}

package cn.testhomekey;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;public class HomeKeyBroadcastReceiver extends BroadcastReceiver {	private final String SYSTEM_REASON = "reason";	//Home键	private final String SYSTEM_HOME_KEY = "homekey";	//最近使用的应用键	private final String SYSTEM_RECENT_APPS = "recentapps";	@Override	public void onReceive(Context context, Intent intent) {		String action = intent.getAction();		if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {			String systemReason = intent.getStringExtra(SYSTEM_REASON);			if (systemReason != null) {				if (systemReason.equals(SYSTEM_HOME_KEY)) {					System.out.println("按下HOME键");				} else if (systemReason.equals(SYSTEM_RECENT_APPS)) {					System.out.println("按下RECENT_APPS键");				}			}		}	}}

Manifest.xml如下:

main.xml如下:

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