今天跟大家一起分享下android开发中比较难的一个环节,可能很多人看到这个标题就会感觉头很大,的确如果没有良好的编码能力和逻辑思维,这块是很难搞明白的,前面2次总结中已经为大家分享过有关技术的一些基本要领,我们先一起简单回顾下它的基本原理。
http://blog.csdn.net/shimiso/article/details/6763664 android 多线程断点续传下载 一
http://blog.csdn.net/shimiso/article/details/6763986 android 多线程断点续传下载 二
什么是多线程下载?
多线程下载其实就是迅雷,BT一些下载原理,通过多个线程同时和服务器连接,那么你就可以榨取到较高的带宽了,大致做法是将文件切割成N块,每块交给单独一个线程去下载,各自下载完成后将文件块组合成一个文件,程序上要完成做切割和组装的小算法
什么是断点续传?
断点续传,就是当我们下载未结束时候,退出保存下载进度,当下次打开继续下载的时接着上次的进度继续下载,不用每次下载都重新开始,那么有关断点续传的原理和实现手段,可参考我以前的一篇总结http://blog.csdn.net/shimiso/article/details/5956314 里面详细讲解http协议断点续传的原理,务必要看懂,否则你无法真正理解本节代码
怎么完成多线程断点续传?
将两者合二为一需要程序记住每个文件块的下载进度,并保存入库,当下载程序启动时候你需要判断程序是否已经下载过该文件,并取出各个文件块的保存记录,换算出下载进度继续下载,在这里你需要掌握java多线程的基本知识,handler的使用,以及集合,算法,文件操作等基本技能,同时还要解决sqlite数据库的同步问题,因为它是不太怎么支持多线程操作的,控制不好经常会出现库被锁定的异常,同时在android2.3以后就不能activity中直接操作http,否则你将收到系统送上的NetworkOnMainThreadException异常,在UI体验上一定记住要使用异步完成,既然大致思路已经清楚,下面我们开始分析程序:
依赖:
apply plugin: 'com.android.application'apply plugin: 'org.greenrobot.greendao' // apply plugin需要添加的插件android { compileSdkVersion 26 defaultConfig { applicationId "com.bwie.duoloadding" minSdkVersion 19 targetSdkVersion 26 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } }}//对greendao的设置greendao { schemaVersion 1 daoPackage 'com.bwie.yue2'//设置DaoMaster、DaoSession、Dao包名 targetGenDir 'src/main/java'//设置DaoMaster、DaoSession、Dao目录即在什么目录下生成}dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'com.android.support:appcompat-v7:26.1.0' implementation 'com.android.support.constraint:constraint-layout:1.0.2' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.1' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1' compile 'org.greenrobot:greendao:3.2.0' // add library 需要添加的依赖添加}
权限
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.bwie.duoloadding"> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <application android:name="com.bwie.yue2.MyApplication" android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application></manifest>
User类:
@Entity//表示这个实体类一会会在数据库中生成对应的表public class User { @Id private Long id; private Integer thread_id; private Integer start_pos; private Integer end_pos; private Integer compelete_size; private String url;
通过builder-》make module 'module名'生成Usedao,DaoMaster,daosession
数据库操作要借助单例和同步,来保证线程的执行顺序,以免多个线程争相抢用sqlite资源导致异常出现
- package cn.demo.Dao;
-
- import java.util.ArrayList;
- import java.util.List;
-
- import android.content.Context;
- import android.database.Cursor;
- import android.database.sqlite.SQLiteDatabase;
- import cn.demo.DBHelper.DBHelper;
- import cn.demo.entity.DownloadInfo;
-
-
-
-
-
public class Dao { private static Dao dao = null; private Context context; private Dao(Context context) { this.context = context; } public static Dao getInstance(Context context) { if (dao == null) { dao = new Dao(context); } return dao; } /** * 查看数据库中是否有数据 */ public synchronized boolean isHasInfors(String urlstr) { int count = -1; Cursor cursor = null; try { List<User> list1 = MyApplication.userDao.queryBuilder().where(UserDao.Properties.Url.eq(urlstr)).list(); count = list1.size(); } catch (Exception e) { e.printStackTrace(); } finally { if (null != cursor) { cursor.close(); } } return count == 0; } /** * 保存 下载的具体信息 */ public synchronized void saveInfos(List<DownloadInfo> infos) { try { for (DownloadInfo info : infos) { User user = new User(null, info.getThreadId(), info.getStartPos(), info.getEndPos(), info.getCompeleteSize(), info.getUrl()); MyApplication.userDao.insert(user); } } catch (Exception e) { e.printStackTrace(); } } /** * 得到下载具体信息 */ public synchronized List<DownloadInfo> getInfos(String urlstr) { List<DownloadInfo> list = new ArrayList<DownloadInfo>(); String sql = "select thread_id, start_pos, end_pos,compelete_size,url from download_info where url=?"; List<User> list1 = MyApplication.userDao.queryBuilder().where(UserDao.Properties.Url.eq(urlstr))/*.build()*/.list(); for (User user : list1) { DownloadInfo infoss = new DownloadInfo( user.getThread_id(), user.getStart_pos(), user.getEnd_pos(), user.getCompelete_size(), user.getUrl()); list.add(infoss); } return list; } /** * 更新数据库中的下载信息 */ public synchronized void updataInfos(int threadId, int compeleteSize, String urlstr) { User user = MyApplication.userDao.queryBuilder() .where(UserDao.Properties.Thread_id.eq(threadId), UserDao.Properties.Url.eq(urlstr)).build().unique(); user.setCompelete_size(compeleteSize); MyApplication.userDao.update(user); } /** * 下载完成后删除数据库中的数据 */ public synchronized void delete(String url) { MyApplication.userDao.deleteAll(); }
单例模式
package com.bwie.yue2;import android.app.Application;/** * Created by T_baby on 17/11/22. */public class MyApplication extends Application { public static UserDao userDao; @Override public void onCreate() { super.onCreate(); DaoMaster.DevOpenHelper devOpenHelper = new DaoMaster.DevOpenHelper(this, "lenvess.db", null); DaoMaster daoMaster = new DaoMaster(devOpenHelper.getWritableDb()); DaoSession daoSession = daoMaster.newSession(); userDao = daoSession.getUserDao(); }}适配器:
- package cn.demo.download;
-
- import java.util.List;
- import java.util.Map;
-
- import android.content.Context;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.view.ViewGroup;
- import android.widget.BaseAdapter;
- import android.widget.Button;
- import android.widget.TextView;
-
-
-
-
- public class DownLoadAdapter extends BaseAdapter{
-
- private LayoutInflater mInflater;
- private List<Map<String, String>> data;
- private Context context;
- private OnClickListener click;
-
- public DownLoadAdapter(Context context,List<Map<String, String>> data) {
- this.context=context;
- mInflater = LayoutInflater.from(context);
- this.data=data;
- }
- public void refresh(List<Map<String, String>> data) {
- this.data=data;
- this.notifyDataSetChanged();
- }
- public void setOnclick(OnClickListener click) {
- this.click=click;
- }
-
-
- @Override
- public int getCount() {
- return data.size();
- }
-
- @Override
- public Object getItem(int position) {
- return data.get(position);
- }
-
- @Override
- public long getItemId(int position) {
- return position;
- }
-
- @Override
- public View getView(final int position, View convertView, ViewGroup parent) {
- final Map<String, String> bean=data.get(position);
- ViewHolder holder = null;
- if (convertView == null) {
- convertView = mInflater.inflate(R.layout.list_item, null);
- holder = new ViewHolder();
- holder.resouceName=(TextView) convertView.findViewById(R.id.tv_resouce_name);
- holder.startDownload=(Button) convertView.findViewById(R.id.btn_start);
- holder.pauseDownload=(Button) convertView.findViewById(R.id.btn_pause);
- convertView.setTag(holder);
- } else {
- holder = (ViewHolder) convertView.getTag();
- }
- holder.resouceName.setText(bean.get("name"));
- return convertView;
- }
- public OnClickListener getClick() {
- return click;
- }
- public void setClick(OnClickListener click) {
- this.click = click;
- }
- private class ViewHolder {
- public TextView resouceName;
- public Button startDownload;
- public Button pauseDownload;
- }
-
- }
注意子线程不要影响主UI线程,灵活运用task和handler,各取所长,保证用户体验,handler通常在主线程中有利于专门负责处理UI的一些工作
- package cn.demo.download;
-
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
-
- import android.app.ListActivity;
- import android.os.AsyncTask;
- import android.os.Bundle;
- import android.os.Handler;
- import android.os.Message;
- import android.view.View;
- import android.widget.Button;
- import android.widget.LinearLayout;
- import android.widget.LinearLayout.LayoutParams;
- import android.widget.ProgressBar;
- import android.widget.TextView;
- import android.widget.Toast;
- import cn.demo.entity.LoadInfo;
- import cn.demo.service.Downloader;
-
- public class MainActivity extends ListActivity {
-
- private static final String URL = "http://download.haozip.com/";
-
- private static final String SD_PATH = "/mnt/sdcard/";
-
- private Map<String, Downloader> downloaders = new HashMap<String, Downloader>();
-
- private Map<String, ProgressBar> ProgressBars = new HashMap<String, ProgressBar>();
-
-
-
- private Handler mHandler = new Handler() {
- public void handleMessage(Message msg) {
- if (msg.what == 1) {
- String url = (String) msg.obj;
- int length = msg.arg1;
- ProgressBar bar = ProgressBars.get(url);
- if (bar != null) {
-
- bar.incrementProgressBy(length);
- if (bar.getProgress() == bar.getMax()) {
- LinearLayout layout = (LinearLayout) bar.getParent();
- TextView resouceName=(TextView)layout.findViewById(R.id.tv_resouce_name);
- Toast.makeText(MainActivity.this, "["+resouceName.getText()+"]下载完成!", Toast.LENGTH_SHORT).show();
-
- layout.removeView(bar);
- ProgressBars.remove(url);
- downloaders.get(url).delete(url);
- downloaders.get(url).reset();
- downloaders.remove(url);
-
- Button btn_start=(Button)layout.findViewById(R.id.btn_start);
- Button btn_pause=(Button)layout.findViewById(R.id.btn_pause);
- btn_pause.setVisibility(View.GONE);
- btn_start.setVisibility(View.GONE);
- }
- }
- }
- }
- };
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- showListView();
- }
-
- private void showListView() {
- List<Map<String, String>> data = new ArrayList<Map<String, String>>();
- Map<String, String> map = new HashMap<String, String>();
- map.put("name", "haozip_v3.1.exe");
- data.add(map);
- map = new HashMap<String, String>();
- map.put("name", "haozip_v3.1_hj.exe");
- data.add(map);
- map = new HashMap<String, String>();
- map.put("name", "haozip_v2.8_x64_tiny.exe");
- data.add(map);
- map = new HashMap<String, String>();
- map.put("name", "haozip_v2.8_tiny.exe");
- data.add(map);
- DownLoadAdapter adapter=new DownLoadAdapter(this,data);
- setListAdapter(adapter);
-
- }
-
-
-
- public void startDownload(View v) {
-
- LinearLayout layout = (LinearLayout) v.getParent();
- String resouceName = ((TextView) layout.findViewById(R.id.tv_resouce_name)).getText().toString();
- String urlstr = URL + resouceName;
- String localfile = SD_PATH + resouceName;
-
- String threadcount = "4";
- DownloadTask downloadTask=new DownloadTask(v);
- downloadTask.execute(urlstr,localfile,threadcount);
-
- };
- class DownloadTask extends AsyncTask<String, Integer, LoadInfo>{
- Downloader downloader=null;
- View v=null;
- String urlstr=null;
- public DownloadTask(final View v){
- this.v=v;
- }
- @Override
- protected void onPreExecute() {
- Button btn_start=(Button)((View)v.getParent()).findViewById(R.id.btn_start);
- Button btn_pause=(Button)((View)v.getParent()).findViewById(R.id.btn_pause);
- btn_start.setVisibility(View.GONE);
- btn_pause.setVisibility(View.VISIBLE);
- }
- @Override
- protected LoadInfo doInBackground(String... params) {
- urlstr=params[0];
- String localfile=params[1];
- int threadcount=Integer.parseInt(params[2]);
-
- downloader = downloaders.get(urlstr);
- if (downloader == null) {
- downloader = new Downloader(urlstr, localfile, threadcount, MainActivity.this, mHandler);
- downloaders.put(urlstr, downloader);
- }
- if (downloader.isdownloading())
- return null;
-
- return downloader.getDownloaderInfors();
- }
- @Override
- protected void onPostExecute(LoadInfo loadInfo) {
- if(loadInfo!=null){
-
- showProgress(loadInfo, urlstr, v);
-
- downloader.download();
- }
- }
-
- };
-
-
-
- private void showProgress(LoadInfo loadInfo, String url, View v) {
- ProgressBar bar = ProgressBars.get(url);
- if (bar == null) {
- bar = new ProgressBar(this, null, android.R.attr.progressBarStyleHorizontal);
- bar.setMax(loadInfo.getFileSize());
- bar.setProgress(loadInfo.getComplete());
- ProgressBars.put(url, bar);
- LinearLayout.LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT, 5);
- ((LinearLayout) ((LinearLayout) v.getParent()).getParent()).addView(bar, params);
- }
- }
-
-
-
- public void pauseDownload(View v) {
- LinearLayout layout = (LinearLayout) v.getParent();
- String resouceName = ((TextView) layout.findViewById(R.id.tv_resouce_name)).getText().toString();
- String urlstr = URL + resouceName;
- downloaders.get(urlstr).pause();
- Button btn_start=(Button)((View)v.getParent()).findViewById(R.id.btn_start);
- Button btn_pause=(Button)((View)v.getParent()).findViewById(R.id.btn_pause);
- btn_pause.setVisibility(View.GONE);
- btn_start.setVisibility(View.VISIBLE);
- }
- }
这是一个信息的实体,记录了一些字典信息,可以认为是一个简单bean对象- package cn.demo.entity;
-
-
-
- public class DownloadInfo {
- private int threadId;
- private int startPos;
- private int endPos;
- private int compeleteSize;
- private String url;
- public DownloadInfo(int threadId, int startPos, int endPos,
- int compeleteSize,String url) {
- this.threadId = threadId;
- this.startPos = startPos;
- this.endPos = endPos;
- this.compeleteSize = compeleteSize;
- this.url=url;
- }
- public DownloadInfo() {
- }
- public String getUrl() {
- return url;
- }
- public void setUrl(String url) {
- this.url = url;
- }
- public int getThreadId() {
- return threadId;
- }
- public void setThreadId(int threadId) {
- this.threadId = threadId;
- }
- public int getStartPos() {
- return startPos;
- }
- public void setStartPos(int startPos) {
- this.startPos = startPos;
- }
- public int getEndPos() {
- return endPos;
- }
- public void setEndPos(int endPos) {
- this.endPos = endPos;
- }
- public int getCompeleteSize() {
- return compeleteSize;
- }
- public void setCompeleteSize(int compeleteSize) {
- this.compeleteSize = compeleteSize;
- }
-
- @Override
- public String toString() {
- return "DownloadInfo [threadId=" + threadId
- + ", startPos=" + startPos + ", endPos=" + endPos
- + ", compeleteSize=" + compeleteSize +"]";
- }
- }
- package cn.demo.entity;
-
-
-
- public class LoadInfo {
- public int fileSize;
- private int complete;
- private String urlstring;
- public LoadInfo(int fileSize, int complete, String urlstring) {
- this.fileSize = fileSize;
- this.complete = complete;
- this.urlstring = urlstring;
- }
- public LoadInfo() {
- }
- public int getFileSize() {
- return fileSize;
- }
- public void setFileSize(int fileSize) {
- this.fileSize = fileSize;
- }
- public int getComplete() {
- return complete;
- }
- public void setComplete(int complete) {
- this.complete = complete;
- }
- public String getUrlstring() {
- return urlstring;
- }
- public void setUrlstring(String urlstring) {
- this.urlstring = urlstring;
- }
- @Override
- public String toString() {
- return "LoadInfo [fileSize=" + fileSize + ", complete=" + complete
- + ", urlstring=" + urlstring + "]";
- }
- }
这是一个核心类,专门用来处理下载的
- package cn.demo.service;
-
- import java.io.File;
- import java.io.InputStream;
- import java.io.RandomAccessFile;
- import java.net.HttpURLConnection;
- import java.net.URL;
- import java.util.ArrayList;
- import java.util.List;
-
- import android.content.Context;
- import android.os.AsyncTask;
- import android.os.Handler;
- import android.os.Message;
- import android.util.Log;
- import cn.demo.Dao.Dao;
- import cn.demo.entity.DownloadInfo;
- import cn.demo.entity.LoadInfo;
-
- public class Downloader {
- private String urlstr;
- private String localfile;
- private int threadcount;
- private Handler mHandler;
- private int fileSize;
- private Context context;
- private List<DownloadInfo> infos;
- private static final int INIT = 1;
- private static final int DOWNLOADING = 2;
- private static final int PAUSE = 3;
- private int state = INIT;
-
- public Downloader(String urlstr, String localfile, int threadcount,
- Context context, Handler mHandler) {
- this.urlstr = urlstr;
- this.localfile = localfile;
- this.threadcount = threadcount;
- this.mHandler = mHandler;
- this.context = context;
- }
-
-
-
- public boolean isdownloading() {
- return state == DOWNLOADING;
- }
-
-
-
-
-
- public LoadInfo getDownloaderInfors() {
- if (isFirst(urlstr)) {
- Log.v("TAG", "isFirst");
- init();
- int range = fileSize / threadcount;
- infos = new ArrayList<DownloadInfo>();
- for (int i = 0; i < threadcount - 1; i++) {
- DownloadInfo info = new DownloadInfo(i, i * range, (i + 1)* range - 1, 0, urlstr);
- infos.add(info);
- }
- DownloadInfo info = new DownloadInfo(threadcount - 1,(threadcount - 1) * range, fileSize - 1, 0, urlstr);
- infos.add(info);
-
- Dao.getInstance(context).saveInfos(infos);
-
- LoadInfo loadInfo = new LoadInfo(fileSize, 0, urlstr);
- return loadInfo;
- } else {
-
- infos = Dao.getInstance(context).getInfos(urlstr);
- Log.v("TAG", "not isFirst size=" + infos.size());
- int size = 0;
- int compeleteSize = 0;
- for (DownloadInfo info : infos) {
- compeleteSize += info.getCompeleteSize();
- size += info.getEndPos() - info.getStartPos() + 1;
- }
- return new LoadInfo(size, compeleteSize, urlstr);
- }
- }
-
-
-
-
- private void init() {
- try {
- URL url = new URL(urlstr);
- HttpURLConnection connection = (HttpURLConnection) url.openConnection();
- connection.setConnectTimeout(5000);
- connection.setRequestMethod("GET");
- fileSize = connection.getContentLength();
-
- File file = new File(localfile);
- if (!file.exists()) {
- file.createNewFile();
- }
-
- RandomAccessFile accessFile = new RandomAccessFile(file, "rwd");
- accessFile.setLength(fileSize);
- accessFile.close();
- connection.disconnect();
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
-
-
-
- private boolean isFirst(String urlstr) {
- return Dao.getInstance(context).isHasInfors(urlstr);
- }
-
-
-
-
- public void download() {
- if (infos != null) {
- if (state == DOWNLOADING)
- return;
- state = DOWNLOADING;
- for (DownloadInfo info : infos) {
- new MyThread(info.getThreadId(), info.getStartPos(),
- info.getEndPos(), info.getCompeleteSize(),
- info.getUrl()).start();
- }
- }
- }
-
- public class MyThread extends Thread {
- private int threadId;
- private int startPos;
- private int endPos;
- private int compeleteSize;
- private String urlstr;
-
- public MyThread(int threadId, int startPos, int endPos,
- int compeleteSize, String urlstr) {
- this.threadId = threadId;
- this.startPos = startPos;
- this.endPos = endPos;
- this.compeleteSize = compeleteSize;
- this.urlstr = urlstr;
- }
- @Override
- public void run() {
- HttpURLConnection connection = null;
- RandomAccessFile randomAccessFile = null;
- InputStream is = null;
- try {
- URL url = new URL(urlstr);
- connection = (HttpURLConnection) url.openConnection();
- connection.setConnectTimeout(5000);
- connection.setRequestMethod("GET");
-
- connection.setRequestProperty("Range", "bytes="+(startPos + compeleteSize) + "-" + endPos);
-
- randomAccessFile = new RandomAccessFile(localfile, "rwd");
- randomAccessFile.seek(startPos + compeleteSize);
-
- is = connection.getInputStream();
- byte[] buffer = new byte[4096];
- int length = -1;
- while ((length = is.read(buffer)) != -1) {
- randomAccessFile.write(buffer, 0, length);
- compeleteSize += length;
-
- Dao.getInstance(context).updataInfos(threadId, compeleteSize, urlstr);
-
- Message message = Message.obtain();
- message.what = 1;
- message.obj = urlstr;
- message.arg1 = length;
- mHandler.sendMessage(message);
- if (state == PAUSE) {
- return;
- }
- }
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
-
- public void delete(String urlstr) {
- Dao.getInstance(context).delete(urlstr);
- }
-
- public void pause() {
- state = PAUSE;
- }
-
- public void reset() {
- state = INIT;
- }
- }
以下是些xml文件
item布局
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content">
- <LinearLayout
- android:orientation="horizontal"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_marginBottom="5dip">
- <TextView
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_weight="1"
- android:id="@+id/tv_resouce_name"/>
- <Button
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_weight="1"
- android:text="下载"
- android:id="@+id/btn_start"
- android:onClick="startDownload"/>
- <Button
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_weight="1"
- android:text="暂停"
- android:visibility="gone"
- android:id="@+id/btn_pause"
- android:onClick="pauseDownload"/>
- </LinearLayout>
- </LinearLayout>
main布局
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:id="@+id/llRoot">
- <ListView android:id="@android:id/list"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- </ListView>
- </LinearLayout>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="cn.demo.download"
- android:versionCode="1"
- android:versionName="1.0">
-
- <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="8" />
- <uses-permission android:name="android.permission.INTERNET"/>
- <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
- <application android:label="@string/app_name"
- android:icon="@drawable/ic_launcher"
- android:theme="@style/AppTheme">
- <activity
- android:name=".MainActivity"
- android:label="@string/app_name" >
- <intent-filter>
- <action android:name="android.intent.action.MAIN" />
- <category android:name="android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
- </application>
-
- </manifest>
运行效果如下
源码下载地址
http://blog.csdn.net/shimiso/article/details/49450551 android 多线程断点续传下载 四-模仿下载助手
转载请标明出处 http://blog.csdn.net/shimiso