Broadcast Receiver的静态注册&动态注册

Broadcast Receiver有两种注册方式,一是静态注册,一是动态注册;二者在实现方法上不尽相同,使用场景也随之不同;

静态注册的Broadcat会从application启动开始就一直常驻监听,直到application消亡;

动态注册较之前者会比较灵活,可动态地在需要监听的地方加注册,但要注意在不需要时调用unregister,取消注册。

静态注册实现方法:
直接在AndroidManifest.xml中注册过滤器

<receiver android:name=".receiver.BootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>

            <intent-filter android:priority="1000" >
                <action android:name="android.intent.action.MEDIA_MOUNTED" />
                <data android:scheme="file" />
            </intent-filter>
        </receiver>

然后在BootReceiver.java监听类中处理监听结果

public class BootReceiver extends BroadcastReceiver{
@Override
    public void onReceive(Context context, Intent intent) {

        Log.e(TAG, "onReceive:"+intent.getAction());
        // TODO Something
    }
}

动态注册实现方法:

定义监听类

BroadcastReceiver alarmReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e(TAG, intent.getAction());
        if(intent.getAction().equals("com.android.deskclock.ALARM_ALERT")) {
        //TODO

        }
    }
};

定义过滤器

IntentFilter filter = new IntentFilter();
// 闹钟响起时触发com.android.deskclock.ALARM_ALERT 
filter.addAction("com.android.deskclock.ALARM_ALERT");

注册

registerReceiver(alarmReceiver, filter);    

取消注册

unregisterReceiver(alarmReceiver);

其间注意是否需要在AndroidManifest.xml中添加相应的监听权限。

    原文作者:Dulcie_y
    原文地址: https://blog.csdn.net/yuanzihui/article/details/50751590
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
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