我想下载此pdf文件
https://scholar.najah.edu/sites/default/files/book/dllt-lhwy-wlrmz-fy-lfwlklwr-lshby.pdf
我正在使用此代码下载pdf文件,它适用于许多文件,但在上面的pdf文件中失败
public void downloadFile(@NonNull String urlStr, @NonNull String fullFilePath,
@NonNull DownloadListener downloadListener) {
cancelStatus = false;
InputStream is = null;
File ffPath = null;
FileOutputStream fos = null;
try {
downloadListener.onProgress(0);
URL url = new URL(urlStr);
URLConnection conexion = url.openConnection();
conexion.setReadTimeout(2000000);
conexion.setRequestProperty("User-Agent", "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_8; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.0.249.0 Safari/532.5");
System.setProperty("http.agent", "");
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
if (lenghtOfFile <= 0) lenghtOfFile = 1;
is = url.openStream();
ffPath = new File(fullFilePath);
fos = new FileOutputStream(ffPath);
int count = 0;
long total = 0;
int progress = 0;
byte data[] = new byte[1024];
while ((count = is.read(data)) != -1) {
if (cancelStatus == true) {
break;
}
total += count;
int progress_temp = (int) total * 100 / lenghtOfFile;
if (progress != progress_temp) {
progress = progress_temp;
downloadListener.onProgress(progress >= 0 && progress <= 100 ? progress : 0);
}
fos.write(data, 0, count);
cancelStatus = downloadListener.onPacketDownloaded(total, lenghtOfFile);
}
if (is != null) is.close();
if (fos != null) fos.close();
if (lenghtOfFile <= 1) {
downloadListener.onComplete();
} else if (ffPath.length() < lenghtOfFile) {
if (cancelStatus) {
downloadListener.onCancel();
} else {
downloadListener.onError();
}
} else if (ffPath.length() >= lenghtOfFile) {
downloadListener.onComplete();
}
if (cancelStatus == true) {
if (ffPath != null) ffPath.delete();
}
} catch (MalformedURLException e) {
try {
if (is != null) is.close();
if (fos != null) fos.close();
} catch (IOException e1) {
e1.printStackTrace();
}
if (ffPath != null) ffPath.delete();
downloadListener.onError();
// TODO Auto-generated catch block
e.printStackTrace();
} catch (FileNotFoundException e) {
try {
if (is != null) is.close();
if (fos != null) fos.close();
} catch (IOException e1) {
e1.printStackTrace();
}
if (ffPath != null) ffPath.delete();
downloadListener.onError();
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
try {
if (is != null) is.close();
if (fos != null) fos.close();
} catch (IOException e1) {
e1.printStackTrace();
}
if (ffPath != null) ffPath.delete();
downloadListener.onError();
// TODO Auto-generated catch block
e.printStackTrace();
}
}
问题是count = is.read(data)
返回-1并在一个循环后从while
循环中断,文件大约345 kb
请帮忙
答案 0 :(得分:0)
/ ** *使用的下载文件也下载文件并保存到手机中 * * @param fileURL包含文件网址 * @param fileName包含文件名 * /
public void DownloadFile(String fileURL, String fileName) {
try {
String RootDir = Environment.getExternalStorageDirectory()
+ File.separator + "Cards List";
File RootFile = new File(RootDir);
RootFile.mkdir();
// File root = Environment.getExternalStorageDirectory();
java.net.URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
FileOutputStream f = new FileOutputStream(new File(RootFile,
fileName + " abc " + ".pdf"));
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
Log.d("Error....", e.toString());
}
} // used to download the file from server
class ProgressBack extends AsyncTask<String, Void, Void> {
ProgressDialog PD;
@Override
protected void onPreExecute() {
super.onPreExecute();
PD = ProgressDialog.show(MainActivity.this, null, "Please Wait ...", true);
PD.setCancelable(true);
}
@Override
protected Void doInBackground(String... params) {
DownloadFile("https://scholar.najah.edu/sites/default/files/book/dllt-lhwy-wlrmz-fy-lfwlklwr-lshby.pdf",
"Cards List"); // calling DownloadFile
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
PD.dismiss();
Toast.makeText(MainActivity.this, "Download Completed", Toast.LENGTH_SHORT).show();
}
}