Android监听Home键实例详解

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：

@override
public 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

mhomewatcher.stopwatch();

更多关于android相关内容感兴趣的读者可查看本站专题：《android开发入门与进阶教程》、《android资源操作技巧汇总》、《android视图view技巧总结》及《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。