Android 《系统广播》

一.接收系统的分钟广播

TimeReceiver.java

package com.xian.app.broadcast.receiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import java.util.Date;
public class TimeReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if(intent !=null){
            Log.i("xian","接收到一个分钟广播"+new Date().toString());
        }
    }
}

Activity.java

//...省略
@Override
protected void onStart() {
	super.onStart()
   /****注册分钟接收广播器****/
        timeReceiver = new TimeReceiver();
        IntentFilter timeFilter = new IntentFilter(Intent.ACTION_TIME_TICK);
        registerReceiver(timeReceiver,timeFilter);
        /****注册分钟接收广播器****/
}
@Override
protected void onStop() {
        super.onStop();
        unregisterReceiver(timeReceiver);
    }
//省略

二、震动广播

StockReceiver.java

public class StockReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i("xian","Vibrator ***************");
        if(intent !=null &&intent.getAction().equals(MainActivity.BROADCAST_SHOCK)){
            //从系统服务中获取震动管理器
            Vibrator vb = (Vibrator)context.getSystemService(Context.VIBRATOR_SERVICE);
            vb.vibrate(500);
        }
    }
}

触发代码

Intent intent = new Intent(BROADCAST_SHOCK);
//8.0后必须制定setComponent方法指定接收器的完整路径
ComponentName componentName = new ComponentName(this,"com.xian.app.broadcast.receiver.StockReceiver");
intent.setComponent(componentName);
sendBroadcast(intent);

静态注册与权限 AndroidManifest.xml

    <uses-permission android:name="android.permission.VIBRATE" />
    <receiver android:name=".receiver.StockReceiver"
              android:exported="true">
              <intent-filter>
                <action android:name="com.xian.app.broadcast.shock" />
              </intent-filter>
    </receiver>