Android Home键、锁屏键监听

一、代码实现如下

/**
 * @author 郭翰林
 * @date 2018/10/31 0031 10:04
 * 注释: 锁屏按钮和Home键监听
 */
public class ScreenBroadcastReceiver extends BroadcastReceiver {
    private static volatile ScreenBroadcastReceiver instance;
    private boolean isReceiver;

    /**
     * 注释：获取单例
     * 时间：2018/10/31 0031 14:46
     * 作者：郭翰林
     *
     * @return
     */
    public static ScreenBroadcastReceiver getInstance() {
        synchronized (ScreenBroadcastReceiver.class) {
            if (instance == null) {
                instance = new ScreenBroadcastReceiver();
            }
            return instance;
        }
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
            UmsAgent.postHistoryLog(SysApplication.getInstance());
        }
    }

    /**
     * 注释：注册屏幕监听广播
     * 时间：2018/10/31 0031 10:05
     * 作者：郭翰林
     */
    public void registerScreenReceive(Context context) {
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
        if (!isReceiver) {
            isReceiver = true;
            context.registerReceiver(instance, filter);
        }
    }

    /**
     * 注释：取消注册屏幕监听广播
     * 时间：2018/10/31 0031 10:05
     * 作者：郭翰林
     */
    public void unregisterScreenReceive(Context context) {
        if (isReceiver && instance != null) {
            isReceiver = false;
            context.unregisterReceiver(instance);
        }
    }
}

二、使用方式

 ScreenBroadcastReceiver.getInstance().registerScreenReceive(SysApplication.getInstance());

这里有几个注意点:

• Context传递applicationcontext，因为是单例，避免内存释放不了，引起不必要的BUG
• 只需在应用启动页的onCreate()方法中使用调用一次即可
• unregisterScreenReceive()反注册可调可不调，调用一次之后监听取消，再次调用registerScreenReceive()方法开启监听。