Activity与Service通信之BroadcastReceive

本例可以实现，一个Activity中点击下载，然后再另一个Activity中显示下载进度。

源码地址：http://download.csdn.net/detail/dinglin_87/4337700

1.第一个Activity

package com.progress;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class ShowActivity extends Activity {Button button, button2;private int progress = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);button = (Button) findViewById(R.id.button);button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// 在这里启动服务Intent intent = new Intent();intent.putExtra("progress", progress);intent.setClass(ShowActivity.this, DownloadService.class);startService(intent);}});button2 = (Button) findViewById(R.id.button2);button2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent inte = new Intent();inte.setClass(ShowActivity.this, Z_ActivityServiceActivity.class);startActivity(inte);}});}}

2、启动的模拟下载的Service

package com.progress;import android.app.Service;import android.content.Intent;import android.os.IBinder;import android.util.Log;public class DownloadService extends Service {private int progress;@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onStart(Intent intent, int startId) {super.onStart(intent, startId);Log.i("DownloadService", "onStart方法");// 得到Activity中传递过来的数据progress = intent.getIntExtra("progress", 0);// 创建一个线程，每隔一秒向Activity发送一个广播，并将progress的新值发送出去new Thread() {public void run() {while (progress < 100) {progress = progress + 1;Intent intent = new Intent();intent.putExtra("serviceProgress", progress);// 设置发送广播的类型，可以随便写一个intent.setAction("com.gufengxiachen.service");sendBroadcast(intent);try {sleep(1000);} catch (Exception e) {e.printStackTrace();}}}}.start();}}

3.启动第二个Activity

package com.progress;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.widget.ProgressBar;public class Z_ActivityServiceActivity extends Activity {private ProgressBar progressBar;private int progress = 0;private MyBroadcastReceiver myBroadcastReceiver = new MyBroadcastReceiver();@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.s);progressBar = (ProgressBar) findViewById(R.id.progressBar);progressBar.setMax(100);// 注册广播接收器IntentFilter filter = new IntentFilter();// 设置接收广播的类型，这里要和Service里设置的类型匹配，还可以在AndroidManifest.xml文件中注册filter.addAction("com.gufengxiachen.service");this.registerReceiver(myBroadcastReceiver, filter);}// 定义一个广播接收器class MyBroadcastReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {// 接收到Service发送的广播信息，得到数据，更新UIprogress = intent.getIntExtra("serviceProgress", 0);progressBar.setProgress(progress);}}}

大功告成，这个功能我纠结了好几天，终于有些进展，还不是很完善！哪位可以再扩展一下，可以实现点击多个“下载”之后，另一个界面可以显示多个进度！如果有Demo请发送至[e-mail]，或者留言！谢谢