目前我正在准备一个将扩展文件包含到开发项目中的演示。我已按照本教程进行操作。
经过一番努力，我能够运行演示应用程序，但在显示下载数据的进度时遇到问题。
我已经在 Play Store 上传了1,060,024 字节的 obb 文件，磁盘大小为1,060,864 字节。
以下是我认为可能出现问题的代码片段。
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());
}
我没有使用补丁文件，只使用主文件。
每次我下载数据时，它都会显示随机进度，如下所示
而实际上它下载完整数据但无法验证完整数据。以下是打印剩余字节时的logcat条目以验证。
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/剩余尺寸是 ::(20326): 203827 11-08 12:22:14.035: E/剩余尺寸是 ::(20326): 465971 11-08 12:22:14.115: E/剩余尺寸是 :: (20326): 728115 11-08 12:22:14.155: E/剩余大小是 ::(20326): 813899 11-08 12:22:14.270: E/剩余大小是 ::(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
我无法确定问题，如果任何机构遇到问题，那将是很大的帮助。
提前致谢。