案例——有序广播

<?xml version="1.0" encoding="utf-8"?>

package bzu.edu.cn.guangbo;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void send(View view)
{
Intent intent=new Intent();
//定义广播的事件类型
intent.setAction("Intercept_Stitch");
//发送广播
sendOrderedBroadcast(intent,null);

}
}

package bzu.edu.cn.guangbo;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class MyBroadcastReceiverOne extends BroadcastReceiver {
public MyBroadcastReceiverOne() {
}

@Override
public void onReceive(Context context, Intent intent) {
// TODO: This method is called when the BroadcastReceiver is receiving
// an Intent broadcast.
//throw new UnsupportedOperationException("Not yet implemented");
Log.i("MyBroadcastReceiverOne","自定义的广播者one，接收到了广播事件");

}

}

package bzu.edu.cn.guangbo;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class MyBroadcastReceiverTwo extends BroadcastReceiver {
public MyBroadcastReceiverTwo() {
}

@Override
public void onReceive(Context context, Intent intent) {
// TODO: This method is called when the BroadcastReceiver is receiving
// an Intent broadcast.
//throw new UnsupportedOperationException("Not yet implemented");
Log.i("MyBroadcastReceiverTwo","自定义的广播者two，接收到了广播事件");

}
}

package bzu.edu.cn.guangbo;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class MyBroadcastReceiverThree extends BroadcastReceiver {
public MyBroadcastReceiverThree() {
}

@Override
public void onReceive(Context context, Intent intent) {
// TODO: This method is called when the BroadcastReceiver is receiving
// an Intent broadcast.
//throw new UnsupportedOperationException("Not yet implemented");
Log.i("MyBroadcastReceiverThree","自定义的广播者three，接收到了广播事件");
}
}

<?xml version="1.0" encoding="utf-8"?>

输出这样的顺序，是因为在清单文件中的

android:priority="600"

属性，值越大，越先输出。

问题2：若将广播接收者MyBroadcastReceiverTwo优先级同样设置为1000，并将MyBroadcastReceiverTwo注册在MyBroadcastOne前面，再来运行程序，观察结果，你能得出什么结论？

清单文件中 android:priority="1000" 

属性值一样时，哪一个先注册，则先输出哪一个

问题3：修改MyBroadcastReceiverTwo如下，观察结果。

把android:priority="1000"此属性值比MyBroadcastReceiverTwo低的

以及晚于它注册的广播全都拦截了。