Android开发之BroadcastReceiver用法实例分析

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="com.example.test" 
  android:versionCode="1" 
  android:versionName="1.0" > 
  <uses-sdk 
    android:minSdkVersion="8" 
    android:targetSdkVersion="16" />
  <application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme" >
    <activity 
      android:name="com.example.broadcast.BroadcastReceiverActivity" 
      android:label="@string/app_name_bc" >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" >
        </action>
        <category android:name="android.intent.category.LAUNCHER" >
        </category>
      </intent-filter>
    </activity>
    <receiver android:name="com.example.broadcast.HelloBroadReciever" >
      <intent-filter>
        <action android:name="comz.test.printlog" >
        </action>
      </intent-filter>
    </receiver>
  </application>
</manifest>

package com.example.broadcast;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import com.example.test.R;
public class BroadcastReceiverActivity extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button b1 = (Button) findViewById(R.id.broadcastBtn);
    b1.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        Log.e("mason", "here");
        // 定义一个intent
        Intent intent = new Intent().setAction("comz.test.printlog")
            .putExtra("info", "here is your info.");
        // 广播出去
        sendBroadcast(intent);
      }
    });
  }
}

package com.example.broadcast;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class HelloBroadReciever extends BroadcastReceiver {
  // 如果接收的事件发生
  @Override
  public void onReceive(Context context, Intent intent) {
    Log.e("mason", "on receive");
    if (intent.getAction().equals("comz.test.printlog")) {
      Log.e("mason", intent.getStringExtra("info"));
    }
  }
}