Android监听Home键实例详解

2020-04-11 10:48:48

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本文实例讲述了Android监听Home键的方法。分享给大家供大家参考，具体如下：

将到android中Home键的监听，很多人第一反应时重写相应Activity的onKeyDown()方法，监听当按下的键的keyCode为KEYCODE_HOME时，进行自己的相应的处理。如：

@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {  if (keyCode == KeyEvent.KEYCODE_HOME) {    stopService(mIntentService);    return true;  }  return super.onKeyDown(keyCode, event);}

但是这样的监听是不能监听到HOME键的。这样的方法只能监听到BACK,MENU键。那么怎么监听Home键了？

1.新建一个监听Home键的Listener

public class HomeListener {  static final String TAG = "HomeListener";  private Context mContext;  private IntentFilter mFilter;  private OnHomePressedListener mListener;  private InnerRecevier mRecevier;  // 回调接口  public interface OnHomePressedListener {    public void onHomePressed();    public void onHomeLongPressed();  }  public HomeListener(Context context) {    mContext = context;    mFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);  }  /**   * 设置监听   *   * @param listener   */  public void setOnHomePressedListener(OnHomePressedListener listener) {    mListener = listener;    mRecevier = new InnerRecevier();  }  /**   * 开始监听，注册广播   */  public void startWatch() {    if (mRecevier != null) {      mContext.registerReceiver(mRecevier, mFilter);    }  }  /**   * 停止监听，注销广播   */  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)) {              // 短按home键              mListener.onHomePressed();            } else if (reason                .equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {              // 长按home键              mListener.onHomeLongPressed();            }          }        }      }    }  }}

2.在使用的类的onCreate方法中注册Home键的监听

/*** 注册Home键的监听*/private void registerHomeListener() {    mHomeWatcher = new HomeListener(this);    mHomeWatcher.setOnHomePressedListener(new OnHomePressedListener() {      @Override      public void onHomePressed() {        //TODO 进行点击Home键的处理        Log.i("xsl", "0000000000000");        stopService(mIntentService);      }      @Override      public void onHomeLongPressed() {        //TODO 进行长按Home键的处理        Log.i("xsl", "0000000000000");      }    });    mHomeWatcher.startWatch();}

3.在使用的类的onPause方法中停止监听