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
- 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);
- }
- });
- }
- }
- 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
