PDFファイルのダウンロード中にWebサイトから元のファイル名を取得したいのですが、名前を変更せずに、SD / Android / Data /（MyAPP）/Filesディレクトリに同じ名前で保存します。今のところ、私はそれを探すときにファイル名がどうあるべきか、そしてダウンロード中にそれを何として保存するかをアンドロイドに伝えなければなりません。これを変更して元の名前として保存する簡単な方法はありますか？ありがとう
private void startDownload() {
String isFileThere = Environment.getExternalStorageDirectory()
+ "/Android/Data/" + getApplicationContext().getPackageName()
+ "/files/xxxxxxxx.pdf";
File f = new File(isFileThere);
if (f.exists()) {
mProgressDialog.setProgress(0);
showPdf();
} else {
DownloadFile downloadFile = new DownloadFile();
downloadFile
.execute(url);
}
}
class DownloadFile extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.show();
}
@Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
mProgressDialog.setProgress(progress[0]);
}
@Override
protected String doInBackground(String... aurl) {
try {
URL url = new URL(aurl[0]);
URLConnection connection = url.openConnection();
connection.connect();
int fileLength = connection.getContentLength();
int tickSize = 2 * fileLength / 100;
int nextProgress = tickSize;
Log.d(
"ANDRO_ASYNC", "Lenght of file: " + fileLength);
InputStream input = new BufferedInputStream(url.openStream());
String path = Environment.getExternalStorageDirectory()
+ "/Android/Data/"
+ getApplicationContext().getPackageName() + "/files";
File file = new File(path);
file.mkdirs();
File outputFile = new File(file, "xxxxxxxx.pdf");
OutputStream output = new FileOutputStream(outputFile);
byte data[] = new byte[1024 * 1024];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
if (total >= nextProgress) {
nextProgress = (int) ((total / tickSize + 1) * tickSize);
this.publishProgress((int) (total * 100 / fileLength));
}
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
mProgressDialog.setProgress(0);
mProgressDialog.dismiss();
} catch (Exception e) {
}
return null;
}
{
}
@Override
protected void onPostExecute(String unused) {
File file = new File(Environment.getExternalStorageDirectory()
+ "/Android/Data/"
+ getApplicationContext().getPackageName()
+ "/files/" + "xxxxxxxx.pdf");
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
try {
startActivity(intent);
} catch (ActivityNotFoundException e) {
Toast.makeText(atcChoice.this,
"No PDF viewer is available, please download one from Play store",
Toast.LENGTH_LONG).show();
}
}
}