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修复网络很差时下载文件不完整的bug

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This commit is contained in:
lyy
2016-06-01 20:57:22 +08:00
parent 259d9f6ed9
commit 71d70f6d66
4 changed files with 111 additions and 112 deletions
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153
downloadutil/src/main/java/com/arialyy/downloadutil/DownLoadUtil.java
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@ -15,7 +15,6 @@ import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Properties;
/**
* Created by lyy on 2015/8/25.
* 下载工具类
@ -23,7 +22,7 @@ import java.util.Properties;
public class DownLoadUtil {
private static final String TAG = "DownLoadUtil";
//下载监听
private IDownloadListener mListener;
private DownloadListener mListener;
/**
* 线程数
*/
@ -40,10 +39,11 @@ public class DownLoadUtil {
boolean isNewTask = true;
private int mCancelNum = 0;
private int mStopNum = 0;
public DownLoadUtil() {
}
public DownloadListener getListener(){
return mListener;
}
/**
* 获取当前下载位置
*
@ -52,25 +52,21 @@ public class DownLoadUtil {
public long getCurrentLocation() {
return mCurrentLocation;
}
public boolean isDownloading() {
return isDownloading;
}
/**
* 取消下载
*/
public void cancelDownload() {
isCancel = true;
}
/**
* 停止下载
*/
public void stopDownload() {
isStop = true;
}
/**
* 多线程断点续传下载文件，暂停和继续
*
@ -99,7 +95,7 @@ public class DownLoadUtil {
}
} catch (Exception e) {
e.printStackTrace();
mListener.onFail();
failDownload("下载失败，记录文件被删除");
return;
}
new Thread(new Runnable() {
@ -111,13 +107,13 @@ public class DownLoadUtil {
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Charset", "UTF-8");
conn.setConnectTimeout(TIME_OUT);
conn.setConnectTimeout(TIME_OUT * 4);
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
conn.setRequestProperty("Accept", "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
conn.connect();
int len = conn.getContentLength();
if (len < 0) { //网络被劫持时会出现这个问题
mListener.onFail();
failDownload("下载失败，网络被劫持");
return;
}
int code = conn.getResponseCode();
@ -136,13 +132,16 @@ public class DownLoadUtil {
isNewTask = true;
} else {
for (int i = 0; i < THREAD_NUM; i++) {
if(pro.getProperty(dFile.getName() + "_record_" + i) == null){
if (pro.getProperty(dFile.getName() + "_record_" + i) == null) {
Object state = pro.getProperty(dFile.getName() + "_state_" + i);
if (state != null && Integer.parseInt(state + "") == 1) {
continue;
}
isNewTask = true;
break;
}
}
}
int blockSize = fileLength / THREAD_NUM;
SparseArray<Thread> tasks = new SparseArray<>();
int[] recordL = new int[THREAD_NUM];
@ -165,7 +164,6 @@ public class DownLoadUtil {
}
mListener.onComplete();
isDownloading = false;
System.gc();
return;
}
continue;
@ -180,6 +178,8 @@ public class DownLoadUtil {
startL = r;
recordL[rl] = i;
rl++;
}else {
isNewTask = true;
}
if (isNewTask) {
recordL[rl] = i;
@ -205,20 +205,21 @@ public class DownLoadUtil {
}
}
} else {
Log.e(TAG, "下载失败，返回码：" + code);
isDownloading = false;
System.gc();
mListener.onFail();
failDownload("下载失败，返回码：" + code);
}
} catch (IOException e) {
Log.e(TAG, "下载失败【downloadUrl:" + downloadUrl + "】\n【filePath:" + filePath + "】" + Util.getPrintException(e));
isDownloading = false;
mListener.onFail();
failDownload("下载失败【downloadUrl:" + downloadUrl + "】\n【filePath:" + filePath + "】" + Util.getPrintException(e));
}
}
}).start();
}
private void failDownload(String msg){
Log.e(TAG, msg);
isDownloading = false;
stopDownload();
mListener.onFail();
System.gc();
}
/**
* 多线程下载任务类,不能使用AsyncTask来进行多线程下载，因为AsyncTask是串行执行的，这种方式下载速度太慢了
*/
@ -226,14 +227,13 @@ public class DownLoadUtil {
private static final String TAG = "DownLoadTask";
private DownloadEntity dEntity;
private String configFPath;
public DownLoadTask(DownloadEntity downloadInfo) {
this.dEntity = downloadInfo;
configFPath = dEntity.context.getFilesDir().getPath() + "/temp/" + dEntity.tempFile.getName() + ".properties";
}
@Override
public void run() {
long currentLocation = 0;
try {
Log.d(TAG, "线程_" + dEntity.threadId + "_正在下载【" + "开始位置 : " + dEntity.startLocation + "，结束位置：" + dEntity.endLocation + "】");
URL url = new URL(dEntity.downloadUrl);
@ -242,10 +242,10 @@ public class DownLoadUtil {
conn.setRequestProperty("Range", "bytes=" + dEntity.startLocation + "-" + dEntity.endLocation);
conn.setRequestMethod("GET");
conn.setRequestProperty("Charset", "UTF-8");
conn.setConnectTimeout(TIME_OUT);
conn.setConnectTimeout(TIME_OUT * 4);
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
conn.setRequestProperty("Accept", "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
conn.setReadTimeout(2000); //设置读取流的等待时间,必须设置该参数
conn.setReadTimeout(TIME_OUT * 24); //设置读取流的等待时间,必须设置该参数
InputStream is = conn.getInputStream();
//创建可设置位置的文件
RandomAccessFile file = new RandomAccessFile(dEntity.tempFile, "rwd");
@ -254,17 +254,15 @@ public class DownLoadUtil {
byte[] buffer = new byte[1024];
int len;
//当前子线程的下载位置
long currentLocation = dEntity.startLocation;
currentLocation = dEntity.startLocation;
while ((len = is.read(buffer)) != -1) {
if (isCancel) {
Log.d(TAG, "++++++++++ thread_" + dEntity.threadId + "_cancel ++++++++++");
break;
}
if (isStop) {
break;
}
//把下载数据数据写入文件
file.write(buffer, 0, len);
synchronized (DownLoadUtil.this) {
@ -275,7 +273,6 @@ public class DownLoadUtil {
}
file.close();
is.close();
if (isCancel) {
synchronized (DownLoadUtil.this) {
mCancelNum++;
@ -284,7 +281,6 @@ public class DownLoadUtil {
if (configFile.exists()) {
configFile.delete();
}
if (dEntity.tempFile.exists()) {
dEntity.tempFile.delete();
}
@ -296,7 +292,6 @@ public class DownLoadUtil {
}
return;
}
//停止状态不需要删除记录文件
if (isStop) {
synchronized (DownLoadUtil.this) {
@ -313,7 +308,6 @@ public class DownLoadUtil {
}
return;
}
Log.i(TAG, "线程【" + dEntity.threadId + "】下载完毕");
writeConfig(dEntity.tempFile.getName() + "_state_" + dEntity.threadId, 1 + "");
mListener.onChildComplete(dEntity.endLocation);
@ -323,25 +317,44 @@ public class DownLoadUtil {
if (configFile.exists()) {
configFile.delete();
}
mListener.onComplete();
isDownloading = false;
mListener.onComplete();
System.gc();
}
} catch (MalformedURLException e) {
e.printStackTrace();
isDownloading = false;
mListener.onFail();
synchronized (DownLoadUtil.this) {
try {
String location = String.valueOf(currentLocation);
writeConfig(dEntity.tempFile.getName() + "_record_" + dEntity.threadId, location);
failDownload("下载链接异常");
} catch (IOException e1) {
e1.printStackTrace();
}
}
} catch (IOException e) {
Log.e(TAG, "下载失败【" + dEntity.downloadUrl + "】" + Util.getPrintException(e));
isDownloading = false;
mListener.onFail();
synchronized (DownLoadUtil.this) {
try {
String location = String.valueOf(currentLocation);
writeConfig(dEntity.tempFile.getName() + "_record_" + dEntity.threadId, location);
failDownload("下载失败【" + dEntity.downloadUrl + "】" + Util.getPrintException(e));
} catch (IOException e1) {
e1.printStackTrace();
}
}
} catch (Exception e) {
Log.e(TAG, "获取流失败" + Util.getPrintException(e));
isDownloading = false;
mListener.onFail();
synchronized (DownLoadUtil.this) {
try {
String location = String.valueOf(currentLocation);
writeConfig(dEntity.tempFile.getName() + "_record_" + dEntity.threadId, location);
failDownload("获取流失败" + Util.getPrintException(e));
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
}
/**
* 将记录写入到配置文件
*
@ -354,8 +367,6 @@ public class DownLoadUtil {
Util.saveConfig(configFile, pro);
}
}
/**
* 子线程下载信息类
*/
@ -368,7 +379,6 @@ public class DownLoadUtil {
long endLocation;
File tempFile;
Context context;
public DownloadEntity(Context context, long fileSize, String downloadUrl, File file, int threadId, long startLocation, long endLocation) {
this.fileSize = fileSize;
this.downloadUrl = downloadUrl;
@ -380,5 +390,56 @@ public class DownLoadUtil {
}
}
public static class DownloadListener implements IDownloadListener {
}
@Override
public void onResume(long resumeLocation) {
}
@Override
public void onCancel() {
}
@Override
public void onFail() {
}
@Override
public void onPreDownload(HttpURLConnection connection) {
}
@Override
public void onProgress(long currentLocation) {
}
@Override
public void onChildComplete(long finishLocation) {
}
@Override
public void onStart(long startLocation) {
}
@Override
public void onChildResume(long resumeLocation) {
}
@Override
public void onStop(long stopLocation) {
}
@Override
public void onComplete() {
}
}
}

61
downloadutil/src/main/java/com/arialyy/downloadutil/DownloadListener.java
View File

@ -1,61 +0,0 @@
package com.arialyy.downloadutil;
import com.arialyy.downloadutil.inf.IDownloadListener;
import java.net.HttpURLConnection;
/**
* 下载监听
*/
public class DownloadListener implements IDownloadListener {
@Override
public void onResume(long resumeLocation) {
}
@Override
public void onCancel() {
}
@Override
public void onFail() {
}
@Override
public void onPreDownload(HttpURLConnection connection) {
}
@Override
public void onProgress(long currentLocation) {
}
@Override
public void onChildComplete(long finishLocation) {
}
@Override
public void onStart(long startLocation) {
}
@Override
public void onChildResume(long resumeLocation) {
}
@Override
public void onStop(long stopLocation) {
}
@Override
public void onComplete() {
}
}