实例介绍
【实例简介】
【实例截图】
【核心代码】
package example.filedownload;
import java.io.File;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import example.filedownload.pub.DownloadMgr;
import example.filedownload.pub.DownloadTask;
import example.filedownload.pub.DownloadTaskListener;
/**
* AsyncTask HttpURLConnection (多线程断点)
* @author SuetMing
* 2011-11-22
*/
public class FileDownloadActivity extends ListActivity {
/** Called when the activity is first created. */
private static final String TAG = "FileDownloadActivity";
private static final int MSG_START_DOWNLOAD = 1;
private static final int MSG_STOP_DOWNLOAD = 2;
private static final int MSG_PAUSE_DOWNLOAD = 3;
private static final int MSG_CONTINUE_DOWNLOAD = 4;
private static final int MSG_INSTALL_APK = 5;
private static final int MSG_CLOSE_ALL_DOWNLOAD_TASK = 6;
private DownloadMgr mgr;
private DownloadTask tasks[];
// private DownloadTask tasks[];
// private DownloadMgr tasks[];
private ListAdapter adapter;
private DownloadTaskListener downloadTaskListener = new DownloadTaskListener() {
@Override
public void updateProcess(DownloadTask mgr) {
// TODO Auto-generated method stub
for(int i = 0; i < Utils.url.length; i ) {
if (Utils.url[i].equalsIgnoreCase(mgr.getUrl())) {
FileDownloadActivity.this.updateDownload(i,mgr);
}
}
}
@Override
public void finishDownload(DownloadTask mgr) {
for(int i = 0; i < Utils.url.length; i ) {
if (Utils.url[i].equalsIgnoreCase(mgr.getUrl())) {
Button btnStart = (Button)adapter.viewList.get(i).findViewById(R.id.btn_start);
Button btnPause = (Button)adapter.viewList.get(i).findViewById(R.id.btn_pause);
Button btnStop = (Button)adapter.viewList.get(i).findViewById(R.id.btn_stop);
Button btnContinue = (Button)adapter.viewList.get(i).findViewById(R.id.btn_continue);
btnStart.setVisibility(0);
btnPause.setVisibility(8);
btnStop.setVisibility(8);
btnContinue.setVisibility(8);
Log.i("TEST", "" mgr.getTotalSize() " " mgr.getTotalTime() " " mgr.getDownloadSpeed());
FileDownloadActivity.this.installAPK(i);
// Log.v(null, "Test threadNum:" Downloader.THREADNUM
// " totalSize:" mgr.getTotalSize()
// " totalTIme:" mgr.getTotalTime()
// " speed:" mgr.getDownloadSpeed()
// );
// if (Downloader.THREADNUM <= 30) {
// Downloader.THREADNUM = 5;
// startDownload(i);
// }
}
}
}
@Override
public void preDownload() {
// TODO Auto-generated method stub
Log.i(TAG,"preDownload");
}
@Override
public void errorDownload(int error) {
// TODO Auto-generated method stub
Log.i(TAG,"errorDownload");
}
};
private Runnable runnable = new Runnable() {
@Override
public void run() {
while (!Utils.isNetworkAvailabel(FileDownloadActivity.this)) {
Toast.makeText(FileDownloadActivity.this, "网络已断开", Toast.LENGTH_LONG);
Message msg = new Message();
msg.what = MSG_CLOSE_ALL_DOWNLOAD_TASK;
handler.sendMessage(msg);
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
};
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_START_DOWNLOAD:
startDownload(msg.arg1);
break;
case MSG_STOP_DOWNLOAD:
stopDownload(msg.arg1);
break;
case MSG_PAUSE_DOWNLOAD:
pauseDownload(msg.arg1);
break;
case MSG_CONTINUE_DOWNLOAD:
continueDownload(msg.arg1);
break;
case MSG_INSTALL_APK:
Button btnStart = (Button)adapter.viewList.get(msg.arg1).findViewById(R.id.btn_start);
Button btnPause = (Button)adapter.viewList.get(msg.arg1).findViewById(R.id.btn_pause);
Button btnStop = (Button)adapter.viewList.get(msg.arg1).findViewById(R.id.btn_stop);
Button btnContinue = (Button)adapter.viewList.get(msg.arg1).findViewById(R.id.btn_continue);
btnStart.setVisibility(0);
btnPause.setVisibility(8);
btnStop.setVisibility(8);
btnContinue.setVisibility(8);
installAPK(msg.arg1);
break;
case MSG_CLOSE_ALL_DOWNLOAD_TASK:
for(int i = 0; i < Utils.url.length; i ) {
if (tasks[i] != null) {
// tasks[i].pause();
}
}
break;
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
adapter = new ListAdapter(this);
setListAdapter(adapter);
// tasks = new DownloadMgr[Utils.url.length];
// tasks = new DownloadTask[Utils.url.length];
tasks = new DownloadTask[Utils.url.length];
handler.post(runnable);
}
public void updateDownload(int viewPos,DownloadTask mgr) {
View convertView = adapter.getView(viewPos, getListView(), null);
ProgressBar pb = (ProgressBar)convertView.findViewById(R.id.progressBar);
pb.setProgress((int) mgr.getDownloadPercent());
TextView view = (TextView) convertView.findViewById(R.id.progress_text_view);
view.setText( ""
(int) mgr.getDownloadPercent() "%" " "
mgr.getDownloadSpeed() "kbps" " "
Utils.size(mgr.getDownloadSize()) "/" Utils.size(mgr.getTotalSize()));
// Log.i(TAG,viewPos " " (int) tasks[viewPos].getDownloadPercent());
}
public synchronized void startDownload(int viewPos) {
if (!Utils.isSDCardPresent()) {
Toast.makeText(this, "未发现SD卡", Toast.LENGTH_LONG);
return;
}
if (!Utils.isSdCardWrittenable()) {
Toast.makeText(this, "SD卡不能读写", Toast.LENGTH_LONG);
return;
}
// if (mgr == null) {
// mgr = new DownloadMgr(this, "umeng", downloadTaskListener);
// mgr.start();
// }
//
// mgr.post(Utils.url[viewPos]);
File file = new File(Utils.APK_ROOT Utils.getFileNameFromUrl(Utils.url[viewPos]));
if (file.exists()) file.delete();
try {
tasks[viewPos] = new DownloadTask(this,
Utils.url[viewPos],
Utils.APK_ROOT,
downloadTaskListener);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
tasks[viewPos].execute();
// if (!Utils.isSDCardPresent()) {
// Toast.makeText(this, "未发现SD卡", Toast.LENGTH_LONG);
// return;
// }
//
// if (!Utils.isSdCardWrittenable()) {
// Toast.makeText(this, "SD卡不能读写", Toast.LENGTH_LONG);
// return;
// }
//
// if (tasks[viewPos] != null) {
// tasks[viewPos].pause();
// }
//
// File file = new File(Utils.APK_ROOT Utils.getFileNameFromUrl(Utils.url[viewPos]));
// if (file.exists()) file.delete();
// // 更新记录
//
// tasks[viewPos] = new DownloadMgr(
// Utils.url[viewPos],
// Utils.APK_ROOT Utils.getFileNameFromUrl(Utils.url[viewPos]),
// getSharedPreferences(TAG,Context.MODE_PRIVATE),
// downloadListener);
// tasks[viewPos].clearDownloadRecord();
// tasks[viewPos].start();
}
public synchronized void pauseDownload(int viewPos) {
if (tasks[viewPos] != null) {
tasks[viewPos].onCancelled();
}
// if (mgr != null) {
// mgr.pause();
// }
}
public synchronized void stopDownload(int viewPos) {
File file = new File(Utils.APK_ROOT Utils.getFileNameFromUrl(Utils.url[viewPos]));
if (file.exists()) file.delete();
if (tasks[viewPos] != null) {
// tasks[viewPos].pause();
}
tasks[viewPos] = null;
}
public synchronized void continueDownload(int viewPos) {
// tasks[viewPos].start();
// startDownload(viewPos);
tasks[viewPos] = null;
try {
tasks[viewPos] = new DownloadTask(this,
Utils.url[viewPos],
Utils.APK_ROOT,
downloadTaskListener);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
tasks[viewPos].execute();
}
public void installAPK(int viewPos) {
if (tasks[viewPos] != null) {
tasks[viewPos] = null;
}
Utils.installAPK(FileDownloadActivity.this, Utils.url[viewPos]);
// Intent intent = new Intent(FileDownloadActivity.this, ImageActivity.class);
// intent.putExtra("url", viewPos);
// startActivity(intent);
}
private class ListAdapter extends BaseAdapter {
private Context context;
public List<View> viewList = new ArrayList<View>();
public ListAdapter(Context context) {
this.context = context;
}
@Override
public int getCount() {
return Utils.url.length;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (position < viewList.size()) {
return viewList.get(position);
}
if (convertView == null) {
convertView = View.inflate(this.context, R.layout.list_item, null);
viewList.add(convertView);
Button btnStart = (Button)convertView.findViewById(R.id.btn_start);
Button btnPause = (Button)convertView.findViewById(R.id.btn_pause);
Button btnStop = (Button)convertView.findViewById(R.id.btn_stop);
Button btnContinue = (Button)convertView.findViewById(R.id.btn_continue);
btnStart.setVisibility(0);
btnPause.setVisibility(8);
btnStop.setVisibility(8);
btnContinue.setVisibility(8);
btnStart.setOnClickListener(new BtnListener(position));
btnPause.setOnClickListener(new BtnListener(position));
btnStop.setOnClickListener(new BtnListener(position));
btnContinue.setOnClickListener(new BtnListener(position));
}
return convertView;
}
private class BtnListener implements View.OnClickListener {
int viewPos;
public BtnListener(int pos) {
this.viewPos = pos;
}
@Override
public void onClick(View v) {
Message message;
switch(v.getId()) {
case R.id.btn_continue:
{
message = new Message();
message.what = MSG_CONTINUE_DOWNLOAD;
message.arg1 = viewPos;
handler.sendMessage(message);
Button btnStart = (Button)viewList.get(viewPos).findViewById(R.id.btn_start);
Button btnPause = (Button)viewList.get(viewPos).findViewById(R.id.btn_pause);
Button btnStop = (Button)viewList.get(viewPos).findViewById(R.id.btn_stop);
Button btnContinue = (Button)viewList.get(viewPos).findViewById(R.id.btn_continue);
// 设置按钮控件的可见性 0 可见，4 不占位不可见 ，8 占位不可见
btnStart.setVisibility(8);
btnPause.setVisibility(0);
btnStop.setVisibility(8);
btnContinue.setVisibility(8);
}
break;
case R.id.btn_pause:
{
message = new Message();
message.what = MSG_PAUSE_DOWNLOAD;
message.arg1 = viewPos;
handler.sendMessage(message);
Button btnStart = (Button)viewList.get(viewPos).findViewById(R.id.btn_start);
Button btnPause = (Button)viewList.get(viewPos).findViewById(R.id.btn_pause);
Button btnStop = (Button)viewList.get(viewPos).findViewById(R.id.btn_stop);
Button btnContinue = (Button)viewList.get(viewPos).findViewById(R.id.btn_continue);
btnStart.setVisibility(8);
btnPause.setVisibility(8);
btnStop.setVisibility(8);
btnContinue.setVisibility(0);
}
break;
case R.id.btn_start:
{
message = new Message();
message.what = MSG_START_DOWNLOAD;
message.arg1 = viewPos;
handler.sendMessage(message);
Button btnStart = (Button)viewList.get(viewPos).findViewById(R.id.btn_start);
Button btnPause = (Button)viewList.get(viewPos).findViewById(R.id.btn_pause);
Button btnStop = (Button)viewList.get(viewPos).findViewById(R.id.btn_stop);
Button btnContinue = (Button)viewList.get(viewPos).findViewById(R.id.btn_continue);
btnStart.setVisibility(8);
btnPause.setVisibility(0);
btnStop.setVisibility(8);
btnContinue.setVisibility(8);
}
break;
case R.id.btn_stop:
{
message = new Message();
message.what = MSG_STOP_DOWNLOAD;
message.arg1 = viewPos;
handler.sendMessage(message);
Button btnStart = (Button)viewList.get(viewPos).findViewById(R.id.btn_start);
Button btnPause = (Button)viewList.get(viewPos).findViewById(R.id.btn_pause);
Button btnStop = (Button)viewList.get(viewPos).findViewById(R.id.btn_stop);
Button btnContinue = (Button)viewList.get(viewPos).findViewById(R.id.btn_continue);
btnStart.setVisibility(0);
btnPause.setVisibility(0);
btnStop.setVisibility(8);
btnContinue.setVisibility(8);
}
break;
}
}
}
}
}
好例子网口号：伸出你的我的手 — 分享！
小贴士
感谢您为本站写下的评论，您的评论对其它用户来说具有重要的参考价值，所以请认真填写。
- 类似“顶”、“沙发”之类没有营养的文字，对勤劳贡献的楼主来说是令人沮丧的反馈信息。
- 相信您也不想看到一排文字/表情墙，所以请不要反馈意义不大的重复字符，也请尽量不要纯表情的回复。
- 提问之前请再仔细看一遍楼主的说明，或许是您遗漏了。
- 请勿到处挖坑绊人、招贴广告。既占空间让人厌烦，又没人会搭理，于人于己都无利。
关于好例子网
本站旨在为广大IT学习爱好者提供一个非营利性互相学习交流分享平台。本站所有资源都可以被免费获取学习研究。本站资源来自网友分享，对搜索内容的合法性不具有预见性、识别性、控制性，仅供学习研究，请务必在下载后24小时内给予删除，不得用于其他任何用途，否则后果自负。基于互联网的特殊性，平台无法对用户传输的作品、信息、内容的权属或合法性、安全性、合规性、真实性、科学性、完整权、有效性等进行实质审查；无论平台是否已进行审查，用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二与二十三条之规定，若资源存在侵权或相关问题请联系本站客服人员，点此联系我们。关于更多版权及免责申明参见 版权及免责申明
网友评论
我要评论