Android BroadcastReceiver 发送有序广播

普通广播（Normal Broadcast）：

一，优缺点：和有序广播的优缺点相反！

二，发送广播的方法：sendBroadcast()

有序广播（Ordered Broadcast）：

一，优缺点

优点：1，按优先级的不同，优先Receiver可对数据进行处理，并传给下一个Receiver

2，通过abortBroadcast可终止广播的传播

缺点：效率低

二，发送广播的方法：sendOrderedBroadcast()

三，优先接收到Broadcast的Receiver可通过setResultExtras(Bundle)方法将处理结果存入Broadcast中，

下一个Receiver 通过 Bundle bundle=getResultExtras(true)方法获取上一个 Receiver传来的数据

程序效果：点击按钮，两个Receiver接收同一条广播，在logcat中打印出数据（按照Receiver的优先顺序，Receiver2先，Receiver1后）

Manifest

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

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.song"

    android:versionCode=""

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:label="@string/app_name"

            android:name=".C48_BroadcastActivity" >

            <intent-filter >

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

            <!--优先级的设定 MyReceiver2大于MyReceiver1，优先级的范围-~ -->

        </activity>

        <receiver android:name=".MyReceiver1">

            <intent-filter android:priority="">

                <action android:name="com.song.123"/>

            </intent-filter>

        </receiver>

        <receiver android:name=".MyReceiver2">

            <intent-filter android:priority="">

                <action android:name="com.song.123"/>

            </intent-filter>

        </receiver>

    </application>

</manifest>

主Activity

package com.song;

//发送广播，bundle绑上key为a的数据

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class C48_BroadcastActivity extends Activity {

    /** Called when the activity is first created. */

    Button button;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        button=(Button)findViewById(R.id.button);

        button.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                Intent intent=new Intent("com.song.123");

                Bundle bundle=new Bundle();

                bundle.putString("a", "aaa");

                intent.putExtras(bundle);

                //有序广播

                sendOrderedBroadcast(intent, null);

            }

        });

    }

}

Receiver2

package com.song;

//优先接到广播，bundle绑上key为b的数据

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

public class MyReceiver2 extends BroadcastReceiver{

    @Override

    public void onReceive(Context context, Intent intent) {

        // TODO Auto-generated method stub

        System.out.println("receiver2");

//        context.getSystemService(name);

        Bundle bundle=intent.getExtras();

        bundle.putString("b", "bbb");

        System.out.println("a="+bundle.get("a"));

        setResultExtras(bundle);

        //切断广播

//        abortBroadcast();

    }

}

Receiver1

package com.song;

//接收从receiver2传来的广播，包含key为a和b的数据

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

public class MyReceiver1 extends BroadcastReceiver{

    @Override

    public void onReceive(Context context, Intent intent) {

        // TODO Auto-generated method stub

        System.out.println("receiver1");

        //要不要接受上一个广播接收器receiver2传来的的数据

        Bundle bundle=getResultExtras(true);

        System.out.println("a="+bundle.getString("a")+",b="+bundle.getString("b"));

    }

}

程序效果

巴特西

Android BroadcastReceiver 发送有序广播

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