public int copy(InputStream input, RandomAccessFile out)
throws IOException, NetworkErrorException {
if (input == null || out == null) {
return -1;
}
byte[] buffer = new byte[BUFFER_SIZE];
BufferedInputStream in = new BufferedInputStream(input, BUFFER_SIZE);
if (DEBUG) {
Log.v(TAG, "length" + out.length());
}
int count = 0, n = 0;
long errorBlockTimePreviousTime = -1, expireTime = 0;
try {
out.seek(out.length());
while (!interrupt) {
n = in.read(buffer, 0, BUFFER_SIZE);
if (n == -1) {
break;
}
out.write(buffer, 0, n);
count += n;
/*
* check network
*/
if (!NetworkUtils.isNetworkAvailable(context)) {
throw new NetworkErrorException("Network blocked.");
}
if (networkSpeed == 0) {
if (errorBlockTimePreviousTime > 0) {
expireTime = System.currentTimeMillis() - errorBlockTimePreviousTime;
if (expireTime > TIME_OUT) {
throw new ConnectTimeoutException("connection time out.");
}
} else {
errorBlockTimePreviousTime = System.currentTimeMillis();
}
} else {
expireTime = 0;
errorBlockTimePreviousTime = -1;
}
}
} finally {
client.close(); // must close client first
client = null;
out.close();
in.close();
input.close();
}
return count;
}
public void setData(String url, String speed, String progress, String isPaused) {
if (hasInited) {
HashMap<Integer, String> item = getItemDataMap(url, speed, progress, isPaused);
titleText.setText(NetworkUtils.getFileNameFromUrl(item.get(KEY_URL)));
speedText.setText(speed);
if (TextUtils.isEmpty(progress)) {
progressBar.setProgress(0);
} else {
progressBar.setProgress(Integer.parseInt(item.get(KEY_PROGRESS)));
}
}
}
public void bindTask(DownloadTask task) {
if (hasInited) {
titleText.setText(NetworkUtils.getFileNameFromUrl(task.getUrl()));
speedText.setText(
task.getDownloadSpeed()
+ "kbps | "
+ task.getDownloadSize()
+ " / "
+ task.getTotalSize());
progressBar.setProgress((int) task.getDownloadPercent());
if (task.isInterrupt()) {
onPause();
}
}
}
public void setData(HashMap<Integer, String> item) {
if (hasInited) {
titleText.setText(NetworkUtils.getFileNameFromUrl(item.get(KEY_URL)));
speedText.setText(item.get(KEY_SPEED));
String progress = item.get(KEY_PROGRESS);
if (TextUtils.isEmpty(progress)) {
progressBar.setProgress(0);
} else {
progressBar.setProgress(Integer.parseInt(progress));
}
if (Boolean.parseBoolean(item.get(KEY_IS_PAUSED))) {
onPause();
}
}
}
private long download()
throws NetworkErrorException, IOException, FileAlreadyExistException, NoMemoryException {
if (DEBUG) {
Log.v(TAG, "totalSize: " + totalSize);
}
/*
* check net work
*/
if (!NetworkUtils.isNetworkAvailable(context)) {
throw new NetworkErrorException("Network blocked.");
}
/*
* check file length
*/
client = AndroidHttpClient.newInstance("DownloadTask");
httpGet = new HttpGet(url);
response = client.execute(httpGet);
totalSize = response.getEntity().getContentLength();
if (!(response.getStatusLine().getStatusCode() == 200)) {
throw new NetworkErrorException("statusCode is not 200");
}
if (file.exists() && totalSize == file.length()) {
if (DEBUG) {
Log.v(null, "Output file already exists. Skipping download.");
}
throw new FileAlreadyExistException("Output file already exists. Skipping download.");
} else if (tempFile.exists()) {
httpGet.addHeader("Range", "bytes=" + tempFile.length() + "-");
previousFileSize = tempFile.length();
client.close();
client = AndroidHttpClient.newInstance("DownloadTask");
response = client.execute(httpGet);
if (DEBUG) {
Log.v(TAG, "File is not complete, download now.");
Log.v(TAG, "File length:" + tempFile.length() + " totalSize:" + totalSize);
}
}
/*
* check memory
*/
long storage = StorageUtils.getAvailableStorage();
if (DEBUG) {
Log.i(null, "storage:" + storage + " totalSize:" + totalSize);
}
if (totalSize - tempFile.length() > storage) {
throw new NoMemoryException("SD card no memory.");
}
/*
* start download
*/
outputStream = new ProgressReportingRandomAccessFile(tempFile, "rw");
publishProgress(0, (int) totalSize);
InputStream input = response.getEntity().getContent();
int bytesCopied = copy(input, outputStream);
if ((previousFileSize + bytesCopied) != totalSize || totalSize == -1 || interrupt) {
throw new IOException("Download incomplete: " + bytesCopied + " != " + totalSize);
}
if (DEBUG) {
Log.v(TAG, "Download completed successfully.");
}
return bytesCopied;
}