intent广播

 1 import android.app.Activity;
 2 import android.content.Intent;
 3 import android.os.Bundle;
 4 import android.view.View;
 5 import android.widget.Button;
 6 
 7 public class FirstActivity extends Activity {
 8 
 9     @Override
10     protected void onCreate(Bundle savedInstanceState) {
11         super.onCreate(savedInstanceState);
12         setContentView(R.layout.firstactivity_layout);// 设置页面布局
13         Button button = (Button) findViewById(R.id.button);// 通过ID值获得按钮对象
14         button.setOnClickListener(new View.OnClickListener() {// 为按钮增加单击事件监听器
15             public void onClick(View v) {
16                 String str = "this.is.the.first.broadcast";//将此字符串作为识别广播的标识符
17                 Intent intent = new Intent(str);// 创建Intent对象
18                 intent.putExtra("message","this is my first message with broadcast");
19                 sendBroadcast(intent);
20             }
21         });
22     }
23 }

 1 import android.app.Activity;
 2 import android.content.BroadcastReceiver;
 3 import android.content.Context;
 4 import android.content.Intent;
 5 import android.os.Bundle;
 6 import android.widget.Toast;
 7 
 8 public class SecondActivity extends BroadcastReceiver {//接收广播要继承BroadcastReceiver
 9 
10     @Override
11     public void onReceive(Context context, Intent intent) {//重写onReceive方法
12         // TODO Auto-generated method stub
13         String msg = intent.getStringExtra("message");//获取key为message里面的字符串的值
14         Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
15     }
16 }

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3     package="com.mingrisoft"
 4     android:versionCode="1"
 5     android:versionName="1.0" >
 6 
 7     <uses-sdk android:minSdkVersion="15" />
 8 
 9     <application
10         android:icon="@drawable/ic_launcher"
11         android:label="@string/app_name" >
12         <activity android:name=".FirstActivity" > <!--发送广播方的类名-->
13             <intent-filter >
14                 <action android:name="android.intent.action.MAIN" />
15                 <category android:name="android.intent.category.LAUNCHER" />
16             </intent-filter>
17         </activity> 
18              
19             <receiver android:name=".SecondActivity"><!--接收广播方的类名 -->
20                 <intent-filter>
21                     <action android:name="this.is.the.first.broadcast"/><!--只接受带该字符串的intent广播-->        
22                             <!--这与发送方（最上面的第一段代码）在初始化intent时作为参数的字符串是一致的-->
23                 </intent-filter>
24              </receiver>
25              
26      </application>
27 </manifest>