发送有序广播_击按钮发送有序广播:“mybroadcast”,自定义三个广播接收器,并设置接收器的优先级

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/stitch_one"
    tools:context="com.example.broadcast.MainActivity">
 
    <Button
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:onClick="send"
        android:layout_marginTop="50dp"
        android:layout_marginLeft="110dp"
        android:textSize="20sp"
        android:text="发送有序广播"
        />
 
</RelativeLayout>

package com.example.broadcast;
 
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();
        intent.setAction("Intercept_Stitch");
        sendOrderedBroadcast(intent,null);
    }
 
 
}

MyBroadcastReceiverOne，
MyBroadcastReceiverTwo，
MyBroadcastReceiverThree不同的接收者打印不同的提示信息。
广播接收者MyBroadcastReceiverOne的代如下：
package com.example.broadcast;
 
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
 
public class MyBroadcastReceiverOne extends BroadcastReceiver {
 
    @Override
    public void onReceive(Context context, Intent intent) {
       Log.i("MyBroadcastReceiverOne","自定义的广播接收者One，接收到了广播事件");
 
    }
}

广播接收者MyBroadcastReceiverTwo的代如下：
package com.example.broadcast;
 
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
 
public class MyBroadcastReceiverTwo extends BroadcastReceiver {
 
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i("MyBroadcastReceiverTwo","自定义的广播接收者Two，接收到了广播事件");
        
    }
}


广播接收者MyBroadcastReceiverThree的代如下：
package com.example.broadcast;
 
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
 
public class MyBroadcastReceiverThree extends BroadcastReceiver {
 
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i("MyBroadcastReceiverThree","自定义的广播接收者Three，接收到了广播事件");
    }
}

三个广播接收者创建成功之后，需要在清单文件中注册他们并为它们制定不同的优先级，集体代码如下所示：
<receiver
            android:name=".MyBroadcastReceiverOne"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="1000">
                <action android:name="Intercept_Stitch" />
            </intent-filter>
        </receiver>
        <receiver
            android:name=".MyBroadcastReceiverTwo"
            android:enabled="true"
            android:exported="true" >
            <intent-filter android:priority="200">
                <action android:name="Intercept_Stitch" />
            </intent-filter>
        </receiver>
 
 
        <receiver
            android:name=".MyBroadcastReceiverThree"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="600">
                <action android:name="Intercept_Stitch" />
            </intent-filter>
        </receiver>

3、运行程序拦截有序广播

修改MyBroadcastReceiverTwo如下，观察结果，你又可以得出什么结论？

package com.example.broadcast;
 
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
 
public class MyBroadcastReceiverTwo extends BroadcastReceiver {
 
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i("MyBroadcastReceiverTwo","自定义的广播接收者Two，接收到了广播事件");
        abortBroadcast();
        Log.i("MyBroadcastReceiverTwo","自定义的广播接收者Two，广播被我终结啦");
    }
}

结果：

结论：abortBroadcast()语句用于终止有序广播，当程序执行完该句后，广播事件将会终结，不会再向下传递。

MyBroadcastReceiverTwo的代如下：