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
[html] view plain copy <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.song" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" /> <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-1000~1000 --> </activity> <receiver android:name=".MyReceiver1"> <intent-filter android:priority="200"> <action android:name="com.song.123"/> </intent-filter> </receiver> <receiver android:name=".MyReceiver2"> <intent-filter android:priority="1000"> <action android:name="com.song.123"/> </intent-filter> </receiver> </application> </manifest> 主Activity
[java] view plain copy 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 [java] view plain copy 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
[java] view plain copy 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 相关资源：python入门教程(PDF版)
