home键监听点击

来源：互联网发布：电脑摄像头全屏软件编辑：程序博客网时间：2024/06/03 05:34
首先感谢http://www.android-study.com/jichuzhishi/558.html 提供
HomeWatcher.java 类：封装了HOME点击事件的广播接收者、注册广播接收者方法以及设置了两个回调接口方法。


   /**
 * Home键监听封装
 */
public class HomeWatcher {
 
    static final String TAG = "HomeWatcher";
    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 HomeWatcher(Context context) {
        mContext = context;
        mRecevier = new InnerRecevier();
        mFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
    }
 
    /**
     * 设置监听
     * @param listener
     */
    public void setOnHomePressedListener(OnHomePressedListener listener) {
        mListener = listener;
    }
 
    /**
     * 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);
        }
    }
 
    /**
     * 广播接收者
     */
    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) {
                    L.i(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();
                        }
                    }
                }
            }
        }
    }
}






好，下面就是这个类在你要监听HOME事件的Activity中的使用方法：

  public class MyActivity extends Activity implements OnHomePressedListener{
     
    private HomeWatcher mHomeWatcher;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    @Override
    protected void onResume() {
        super.onResume();
        mHomeWatcher = new HomeWatcher(this);
        mHomeWatcher.setOnHomePressedListener(this);
        mHomeWatcher.startWatch();
    }
 
    @Override
    protected void onPause() {
        super.onPause();
        mHomeWatcher.setOnHomePressedListener(null);
        mHomeWatcher.stopWatch();
    }
 
    @Override
    public void onHomePressed() {
        // TODO 点击HOME键时 要做的事情
    }
 
    @Override
    public void onHomeLongPressed() {
        // TODO 长按HOME键时 要做的事情
    }
}
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