我在我的应用程序中显示下载文件的进度对话框，但如果用户需要取消下载，那么他将不得不按下后退按钮，然后它将弹出带有两个按钮的警报对话框。问题是我必须双击警报对话框的按钮，然后只关闭警报对话框。建议我任何解决方案。
这是和平的代码供您参考..
@Override
protected Dialog onCreateDialog(int id)
{
switch (id)
{
case progress_bar_type:
pDialog = new ProgressDialog(this);
pDialog.setMessage("Downloading file. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setMax(100);
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialog.setCancelable(true);
pDialog.show();
pDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if(keyCode == KeyEvent.KEYCODE_BACK){
running = false;
/*Intent intent = new Intent(context, NewDialog.class);
startActivity(intent);*/
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
alertDialog.setIcon(R.drawable.ic_launcher);
alertDialog.setTitle("Ariisto");
alertDialog.setMessage("Do you Want to Cancel the Download ?");
alertDialog.setCancelable(true);
alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
File externalFile = new File(Environment.getExternalStorageDirectory(),"downloadedfile.pdf");
externalFile.delete();
pDialog.dismiss();
running = false;
Log.d("External File", "DELETED");
pDialog.setProgress(0);
count = 2;
}
});
alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
new DownloadFileFromURL().execute(file_url);
running = true;
count = 0;
}
});
AlertDialog alert = alertDialog.create();
alert.show();
}
return false;
}
});