Android Intent发送广播消息实例详解

String UNIQUE_STRING="edu.hrbeu.BroadcastReceiverDemo";
Intent intent=new Intent(UNIQUE_STRING);
intent.putExtra("key1","value1");
intent.putExtra("key2","value2");
sendBroadcast(intent);

public class MyBroadcastReceiver extends BroadcastReceiver{
 @Override
 public void onReceive(Context context,Intent intent){
 //TODO: React to the Intent received.
 }
}

botton.setOnClickListener(new OnClickListener()){
  public void onClick(View view){
   Intent intent=new Intent("edu.hrbeu.BroadcastReceiverDemo");
   intent.putExtra("message",entryText.getText().toString());
   sendBroadcast(intent);
  }
 }};

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="edu.hrbeu.BroadcastReceiverDemo">

 <application
  android:allowBackup="true"
  android:icon="@mipmap/ic_launcher"
  android:label="@string/app_name"
  android:supportsRtl="true"
  android:theme="@style/AppTheme">
  <activity
   android:name=".BroadcastReceiverDemo"
   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=".MyBroadcastReceiver">
   <intent-filter>
   <action android:name="edu.hrbeu.BroadcastReceiverDemo"/>
   </intent-filter>
  </receiver>
 </application>

</manifest>

public class MyBroadcastReceiver extends BroadcastReceiver{
 @Override
 public void onReceive(Context context,Intent intent){
 String msg=intent.getStringExtra("message");
 Toast.makeText(context,msg,Toast.LENGTH_SHORT).show();
 }
}