Android中Broadcast

前一段时间，听说过android的广播，这段时间经过研究终于可以写出一个Demo

首先新建一个android工程项目

在BroadCastActivity.java中

package com.mypack;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 BroadCastActivity extends Activity {private Button sendbtn;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);sendbtn=(Button)this.findViewById(R.id.button1);sendbtn.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stub
                send();}});}public void send(){Intent intent=new Intent("android.intent.action.MY_BROADCAST");//标记作用的，广播接收器通过匹配"android.intent.action.MY_BROADCAST"接收发送的消息，在AndroidMainfest.xml中进行过滤匹配intent.putExtra("msg","chen liang");//发送的消息this.sendBroadcast(intent);//发送广播
    }
}

MyReceiver.java相当于接收器里面写成

package com.mypack;import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.View;public class MyReceiver extends BroadcastReceiver{private static final String TAG="MyReciver";@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubString msg=intent.getStringExtra("msg");//接收信息
        Log.i(TAG,msg);}
}

另外还要对广播进行注册，要说到注册有静态注册和动态注册两种方式，在这里我说的是静态注册
静态注册是在AndroidMainfest.xml中进行的

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.mypack"android:versionCode="1"android:versionName="1.0" ><uses-sdk android:minSdkVersion="7" /><applicationandroid:icon="@drawable/ic_launcher"android:label="@string/app_name" ><activityandroid:name=".BroadCastActivity"android:label="@string/app_name" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><receiver  android:name=".MyReceiver"><intent-filter><action android:name="android.intent.action.MY_BROADCAST"></action><category android:name="android.intent.category.DEFAULT"></category></intent-filter></receiver></application></manifest>

主要就是    <receiver  android:name=".MyReceiver">
            <intent-filter>
                <action android:name="android.intent.action.MY_BROADCAST"></action>
                <category android:name="android.intent.category.DEFAULT"></category>
            </intent-filter>
        </receiver>

这样就OK了

运行程序后

点击按钮后

OK