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.youkuaiyun.com/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;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
	
		button = (Button) findViewById(R.id.button);
		button.setOnClickListener(new OnClickListener() {

			@Override
			public 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() {
			
			@Override
			public 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;
	
	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}

	@Override
	public 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();

	@Override
	public 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 {
		@Override
		public void onReceive(Context context, Intent intent) {
			// 接收到Service发送的广播信息，得到数据，更新UI
			progress = 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dinglin_87@163.com，或者留言！谢谢