Android 多线程下载+UI进度条刷新

package com.comdosoft.qxg; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Timer; import java.util.TimerTask; import com.comdosoft.pojo.DownViewPojo; import android.app.Activity; import android.app.DownloadManager; import android.app.DownloadManager.Request; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.webkit.MimeTypeMap; import android.widget.Button; import android.widget.LinearLayout; import android.widget.ProgressBar; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; public class Qixueguan_appActivity extends Activity { private static int MB_SIZE = 1024 * 1024; private static int KB_SIZE = 1024; private LinearLayout mLinearLayout; private DownloadManager downloadManager; private List<DownViewPojo> mDownViewList = new ArrayList<DownViewPojo>(); private List<String> mUrlList = new ArrayList<String>(); private List<Map<String, Object>> mData; private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); int msgId = msg.what; switch (msgId) { case 1: DownViewPojo dv = mDownViewList.get(msg.getData().getInt( "index")); dv.getPb().setMax(msg.arg2); dv.getPb().setProgress(msg.arg1); dv.getSize().setText( getFileSize(msg.arg1) + "/" + getFileSize(msg.arg2)); dv.getPro().setText(msg.arg1 * 100 / msg.arg2 + "%"); if (msg.arg1 == msg.arg2) { Toast.makeText(getApplicationContext(), "文件" + msg.getData().getInt("index") + "下载完成", 0) .show(); dv.getBn().setText("已下载"); dv.getTimer().cancel(); } break; } } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); initData(); } private void initData() { downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); mLinearLayout = (LinearLayout) findViewById(R.id.mLinearLayout); mUrlList.add("http://music.baidu.com/data/music/file?link=http://zhangmenshiting.baidu.com/data2/music/44804430/733833686400256.mp3?xcode=b6941d7fea0365339abd5bdf376d47f3959a2ceab6004476"); mUrlList.add("http://music.baidu.com/data/music/file?link=http://zhangmenshiting.baidu.com/data2/music/35468028/2355901379365261320.mp3?xcode=bf64667c54c02224b9ce27303f1db07269eae4df0fb501ff"); mUrlList.add("http://music.baidu.com/data/music/file?link=http://zhangmenshiting.baidu.com/data2/music/57129486/2658981379350861256.mp3?xcode=39cb9a27958605ddf9dd2bec60984cad0d620aa2c069e25d"); for (int i = 0; i < mUrlList.size(); i++) { initView(i); } } public void initView(final int index) { LayoutInflater inflater = LayoutInflater.from(this); RelativeLayout relativeLayout = (RelativeLayout) inflater.inflate( R.layout.item, null); TextView pro = (TextView) relativeLayout.findViewById(R.id.downPro); TextView size = (TextView) relativeLayout.findViewById(R.id.downSize); ProgressBar pb = (ProgressBar) relativeLayout.findViewById(R.id.downPb); Button bn = (Button) relativeLayout.findViewById(R.id.downBn); DownViewPojo dv = new DownViewPojo(pro, size, pb, bn); mDownViewList.add(dv); bn.setOnClickListener(new OnClickListener() { public void onClick(View v) { downCourse(index); } }); mLinearLayout.addView(relativeLayout); } public void downCourse(final int index) { // 开始下载 Uri resource = Uri.parse(mUrlList.get(index)); DownloadManager.Request request = new DownloadManager.Request(resource); request.setAllowedNetworkTypes(Request.NETWORK_MOBILE | Request.NETWORK_WIFI); request.setAllowedOverRoaming(false); // 设置文件类型 MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton(); String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap .getFileExtensionFromUrl(mUrlList.get(index))); request.setMimeType(mimeString); // 在通知栏中显示 request.setShowRunningNotification(false); request.setVisibleInDownloadsUi(false); // sdcard的目录下的download文件夹 request.setDestinationInExternalPublicDir("/download/", index + ".mp3"); final long id = downloadManager.enqueue(request); Timer t = new Timer(); mDownViewList.get(index).setTimer(t); t.schedule(new TimerTask() { @Override public void run() { // 保存id int[] bytesArr = getBytesAndStatus(id); Bundle bundle = new Bundle(); bundle.putInt("index", index); Message msg = handler.obtainMessage(1, bytesArr[0], bytesArr[1], bytesArr[2]); msg.setData(bundle); handler.sendMessage(msg); }; }, 0, 1000); } public int[] getBytesAndStatus(long downloadId) { int[] bytesAndStatus = new int[] { -1, -1, 0 }; DownloadManager.Query query = new DownloadManager.Query() .setFilterById(downloadId); Cursor c = null; try { c = downloadManager.query(query); if (c != null && c.moveToFirst()) { bytesAndStatus[0] = c .getInt(c .getColumnIndexOrThrow(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR)); bytesAndStatus[1] = c .getInt(c .getColumnIndexOrThrow(DownloadManager.COLUMN_TOTAL_SIZE_BYTES)); bytesAndStatus[2] = c.getInt(c .getColumnIndex(DownloadManager.COLUMN_STATUS)); } } finally { if (c != null) { c.close(); } } return bytesAndStatus; } public String getFileSize(long size) { if (size <= 0) { return "0M"; } if (size >= MB_SIZE) { return ((((double) (size * 100 / MB_SIZE)) / 100) + "M"); } else if (size >= KB_SIZE) { return (((double) (size * 100 / KB_SIZE)) / 100 + "K"); } else { return size + "B"; } } }