android监听Home键

一、使用注册广播监听home键、多任务键

class InnerRecevier extends BroadcastReceiver {

  final String SYSTEM_DIALOG_REASON_KEY = "reason";
 
  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 (Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action)) {
    String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
    if (reason != null) {
     if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
      Toast.makeText(MainActivity.this, "Home键被监听", Toast.LENGTH_SHORT).show();
     } else if (reason.equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {
      Toast.makeText(MainActivity.this, "多任务键被监听", Toast.LENGTH_SHORT).show();
     }
    }
   }
  }
｝

在Activity中的onCreate()方法中注册广播，代码如下：

@Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
 
  //创建广播
  InnerRecevier innerReceiver = new InnerRecevier();
  //动态注册广播
  IntentFilter intentFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
  //启动广播
  registerReceiver(innerReceiver, intentFilter);
 }