Android中BroadCast与Activity之间的通信

在看本文之前，如果你对于Android的广播机制不是很了解，建议先行阅读我转载的一篇博文：图解 Android 广播机制。

由于本案例比较简单，故直接在此贴出代码，不做过多的阐述。

先上效果截图：

MainActivity的代码如下：

package com.gc.testbroadcasedemo;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;/** *  * @author Android将军 * */public class MainActivity extends Activity {private Button mButton;private TextView mTextView;public static String ACTION_INTENT_TEST = "com.gc.broadcase.test";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mTextView = (TextView) findViewById(R.id.message_tv);mButton = (Button) findViewById(R.id.send_btn);mButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent mIntent = new Intent(ACTION_INTENT_TEST);sendBroadcast(mIntent);}});registerMessageReceiver();}//在销毁时要与广播解绑@Overrideprotected void onDestroy() {unregisterReceiver(mMessageReceiver);super.onDestroy();}public MessageReceiver mMessageReceiver;public static String ACTION_INTENT_RECEIVER = "com.gc.broadcast.receiver";/** * 动态注册广播 */public void registerMessageReceiver() {mMessageReceiver = new MessageReceiver();IntentFilter filter = new IntentFilter();filter.addAction(ACTION_INTENT_RECEIVER);registerReceiver(mMessageReceiver, filter);}public class MessageReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubif (intent.getAction().equals(ACTION_INTENT_RECEIVER)) {mTextView.setText(intent.getStringExtra("message"));}}}}

MyBroadCast的代码如下：

package com.gc.testbroadcasedemo;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.util.Log;/** *  * @author Android将军 * */public class MyBroadCast extends BroadcastReceiver{public MyBroadCast(){Log.v("BROADCAST_TAG", "MyBroadCast");}@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubLog.v("BROADCAST_TAG", "onReceive");Bundle bundle = intent.getExtras();if(intent.getAction().equals(MainActivity.ACTION_INTENT_TEST)){processCustomMessage(context, bundle);}}//send msg to MainActivityprivate void processCustomMessage(Context context, Bundle bundle) {Intent mIntent=new Intent(MainActivity.ACTION_INTENT_RECEIVER);mIntent.putExtra("message", "测试Broadcast与Activity之间的通信");context.sendBroadcast(mIntent);}}

案例工程目录如下：

在AndroidManifest中静态注册MyBroadCast广播，代码如下：

 <receiver android:name=".MyBroadCast">            <intent-filter >                <action android:name="com.gc.broadcase.test"/>            </intent-filter>        </receiver>

转载请注明出处： http://blog.csdn.net/android_jiangjun/article/details/39928243

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