ホームボタンをタップした際のイベントを取得しちゃる

HomeButtonReceiverActivity.java

public class HomeButtonReceiverActivity extends Activity {

  private HomeButtonReceiver mHomeButtonReceiver;
  private IntentFilter mIntentFilter;

  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
  
      //TODO ホームボタン押された時の Receiver の登録
      mHomeButtonReceiver = new HomeButtonReceiver();
      mIntentFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
  }
  
  @Override
  public void onResume() {
      super.onResume();
      
      //TODO ホームボタン押された時の Receiver の登録
      this.registerReceiver(mHomeButtonReceiver, mIntentFilter);
  }
  
  //TODO
  private class HomeButtonReceiver extends BroadcastReceiver {
      @Override
      public void onReceive(Context context, Intent intent) {
  
          Toast.makeText(getApplicationContext(), "ホームボタンが押されました", Toast.LENGTH_LONG).show();
      }
  }
}