扩展文件下载示例未显示完整进度 [英] Expansion file download sample not showing full progress
问题描述
当前，我正在准备一个演示，以将Expansion File包含到已开发的项目中. 我已遵循此教程.
Currently I am preparing a demo for including Expansion File into a developed project. I have followed this Tutorial.
经过很多努力，我能够运行演示应用程序，但是在显示下载数据的进度时遇到问题.
After a lot of struggle I am able to run the demo application but having issues in displaying progress for downloaded data.
我已在play store上上传了obb文件，该文件为 1,060,024字节，并且在磁盘大小上为 1,060,864字节.
I have uploaded obb file on play store which is 1,060,024 bytes and on disk size is 1,060,864 bytes.
以下是我认为可能会出现问题的代码段.
following is code snippet where I think problem can be.
private static final XAPKFile[] xAPKS = { new XAPKFile(true,6,1060024L) };
void validateXAPKZipFiles() {
AsyncTask<Object, DownloadProgressInfo, Boolean> validationTask = new AsyncTask<Object, DownloadProgressInfo, Boolean>() {
@Override
protected void onPreExecute() {
mDashboard.setVisibility(View.VISIBLE);
mCellMessage.setVisibility(View.GONE);
mStatusText.setText(R.string.text_verifying_download);
mPauseButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mCancelValidation = true;
}
});
mPauseButton.setText(R.string.text_button_cancel_verify);
super.onPreExecute();
}
@Override
protected Boolean doInBackground(Object... params) {
for (XAPKFile xf : xAPKS) {
String fileName = Helpers.getExpansionAPKFileName(
MainActivity.this, xf.mIsMain, xf.mFileVersion);
if (!Helpers.doesFileExist(MainActivity.this, fileName,
xf.mFileSize, true)) {
return false;
}
fileName = Helpers.generateSaveFileName(MainActivity.this,
fileName);
ZipResourceFile zrf;
byte[] buf = new byte[1024 * 256];
try {
zrf = new ZipResourceFile(fileName);
ZipEntryRO[] entries = zrf.getAllEntries();
/**
* First calculate the total compressed length
*/
long totalCompressedLength = 0;
for (ZipEntryRO entry : entries) {
totalCompressedLength += entry.mCompressedLength;
}
float averageVerifySpeed = 0;
long totalBytesRemaining = totalCompressedLength;
long timeRemaining;
/**
* Then calculate a CRC for every file in the Zip file,
* comparing it to what is stored in the Zip directory.
* Note that for compressed Zip files we must extract
* the contents to do this comparison.
*/
for (ZipEntryRO entry : entries) {
if (-1 != entry.mCRC32) {
long length = entry.mUncompressedLength;
CRC32 crc = new CRC32();
DataInputStream dis = null;
try {
dis = new DataInputStream(
zrf.getInputStream(entry.mFileName));
long startTime = SystemClock.uptimeMillis();
while (length > 0) {
int seek = (int) (length > buf.length ? buf.length
: length);
dis.readFully(buf, 0, seek);
crc.update(buf, 0, seek);
length -= seek;
long currentTime = SystemClock
.uptimeMillis();
long timePassed = currentTime
- startTime;
if (timePassed > 0) {
float currentSpeedSample = (float) seek
/ (float) timePassed;
if (0 != averageVerifySpeed) {
averageVerifySpeed = SMOOTHING_FACTOR
* currentSpeedSample
+ (1 - SMOOTHING_FACTOR)
* averageVerifySpeed;
} else {
averageVerifySpeed = currentSpeedSample;
}
totalBytesRemaining -= seek;
timeRemaining = (long) (totalBytesRemaining / averageVerifySpeed);
Log.e("Remaining Size is :: ",
" "
+ (totalCompressedLength - totalBytesRemaining));
this.publishProgress(new DownloadProgressInfo(
totalCompressedLength,
totalCompressedLength
- totalBytesRemaining,
timeRemaining,
averageVerifySpeed));
}
startTime = currentTime;
if (mCancelValidation)
return true;
}
if (crc.getValue() != entry.mCRC32) {
Log.e(Constants.TAG,
"CRC does not match for entry: "
+ entry.mFileName);
Log.e(Constants.TAG, "In file: "
+ entry.getZipFileName());
return false;
}
} finally {
if (null != dis) {
dis.close();
}
}
}
}
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
return true;
}
@Override
protected void onProgressUpdate(DownloadProgressInfo... values) {
onDownloadProgress(values[0]);
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(Boolean result) {
if (result) {
mDashboard.setVisibility(View.VISIBLE);
mCellMessage.setVisibility(View.GONE);
mStatusText.setText(R.string.text_validation_complete);
mPauseButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
mPauseButton.setText(android.R.string.ok);
} else {
mDashboard.setVisibility(View.VISIBLE);
mCellMessage.setVisibility(View.GONE);
mStatusText.setText(R.string.text_validation_failed);
mPauseButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
mPauseButton.setText(android.R.string.cancel);
}
super.onPostExecute(result);
}
};
validationTask.execute(new Object());
}
我不使用补丁文件，仅使用主文件.
I am not using patch file , using only main file.
每次下载数据时，它都会显示如下所示的随机进度
Every time I download data it shows random progress as below
实际上，它正在下载完整数据，但无法验证完整数据.以下是打印剩余字节进行验证时的logcat条目.
And in actual its downloading full data but can not verify full data.Following is the logcat entries when printing remaining bytes to verify.
11-08 12:22:12.205:E/剩余大小为::( 20326):46804 11-08 12:22:13.370:E/剩余大小为::( 20326):99054 11-08 12:22:13.460:E/剩余大小为::( 20326):203827 11-08 12:22:14.035:E/剩余大小为::( 20326):465971 11-08 12:22:14.115:E/剩余大小为::( 20326):728115 11-08 12:22:14.155:E/剩余大小为::( 20326):813899 11-08 12:22:14.270:E/剩余大小为::( 20326):850970 11-08 12:22:14.295:E/剩余大小为::( 20326):868781 11-08 12:22:14.320:E/剩余大小为::( 20326):1041595
11-08 12:22:12.205: E/Remaining Size is ::(20326): 46804 11-08 12:22:13.370: E/Remaining Size is ::(20326): 99054 11-08 12:22:13.460: E/Remaining Size is ::(20326): 203827 11-08 12:22:14.035: E/Remaining Size is ::(20326): 465971 11-08 12:22:14.115: E/Remaining Size is ::(20326): 728115 11-08 12:22:14.155: E/Remaining Size is ::(20326): 813899 11-08 12:22:14.270: E/Remaining Size is ::(20326): 850970 11-08 12:22:14.295: E/Remaining Size is ::(20326): 868781 11-08 12:22:14.320: E/Remaining Size is ::(20326): 1041595
我无法确定问题所在，如果有人遇到该问题，那将是很大的帮助.
I am not able to identify the issue , if any body has face the issue it would be great help.
谢谢.
推荐答案
这里的问题是，总大小是根据压缩文件中的条目计算的，这导致压缩文件中文件的大小未压缩.并且进度是在相同的基础上显示的.
The problem here is, the total size is being calculated on the entries within the zipped file, which is resulting in uncompressed size of the files within the zipped file. And the progress is being displayed on the basis of the same.
-
第一种解决方案是，要检查扩展文件的可用性，请保持检查在应用程序中的状态，但要进行计算，请提供原始大小. 正在对zip文件库中的压缩条目进行计算，如有可能，请进行相应的修改. (我没有尝试过这种解决方案.)
First solution is that for checking expansion file availability, keep the check as it is in your app, but for calculation supply the original size. The calculations are being done for zipped entries in zip file library, modify it accordingly, if possible. (I have not tried this solution.)
第二个是，以不压缩文件夹内文件的方式压缩文件.在这种情况下，您无需执行任何操作，但是缺点是用户必须下载更大的文件.
Second one is, compress the files in a way that files inside the folder are uncompressed. In this case you will have nothing to do, but drawback will be that user has to download a bit larger size of file.
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