Android中BroadCast與Activity之間的通訊

標籤：broadcast   broadcastreceiver   android開發   通訊   activity   

在看本文之前，如果你對於Android的廣播機制不是很瞭解，建議先行閱讀我轉載的一篇博文：圖解 Android 廣播機制。

由於本案例比較簡單，故直接在此貼出代碼，不做過多的闡述。

先上效果：

MainActivity的代碼如下：

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將軍 * */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();}//在銷毀時要與廣播解除綁定@Overrideprotected void onDestroy() {unregisterReceiver(mMessageReceiver);super.onDestroy();}public MessageReceiver mMessageReceiver;public static String ACTION_INTENT_RECEIVER = "com.gc.broadcast.receiver";/** * 動態註冊廣播 */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的代碼如下：

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將軍 * */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", "測試Broadcast與Activity之間的通訊");context.sendBroadcast(mIntent);}}

案例工程目錄如下：

在AndroidManifest中靜態註冊MyBroadCast廣播，代碼如下：

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

轉載請註明出處：http://blog.csdn.net/android_jiangjun/article/details/39928243

Android中BroadCast與Activity之間的通訊