Question

我需要帮助，我的DIALOG_DOWNLOAD_PROGRESS总是在onPreExecute（）上显示100％（第二次下载尝试）。如何从第二次尝试下载的0％开始。需要帮助。感谢

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
    case DIALOG_DOWNLOAD_PROGRESS:
        mProgressDialog = new ProgressDialog(this);
        mProgressDialog.setMessage("Downloading file..");
        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        mProgressDialog.setCancelable(true);
        mProgressDialog.show();
        return mProgressDialog;
    default:

        return null;
    }
}

类DownloadFileAsync扩展了AsyncTask {

@Override
protected void onPreExecute() {
    super.onPreExecute();
    showDialog(DIALOG_DOWNLOAD_PROGRESS);
}

...

}
protected void onProgressUpdate(String... progress) {
     Log.d("ANDRO_ASYNC",progress[0]);
     mProgressDialog.setProgress(Integer.parseInt(progress[0]));

}

@Override
protected void onPostExecute(String unused) {
    dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
}

Answer 1

因为onCreateDialog只被调用一次来创建对话框，所以你必须重置onPrepareDialog中的对话框，每次在显示对话框之前调用该对话框。

@Override
protected void onPrepareDialog(int id, Dialog dialog, Bundle args) 
    if (id == DIALOG_DOWNLOAD_PROGRESS)
        mProgressDialog.setProgress(0);
}

Answer 2

protected Dialog onCreateDialog(int id){

        switch(id){

            case 0:

                _progressDialog = new ProgressDialog(null);


                _progressDialog.setTitle("Downloading files..");

                _progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

                _progressDialog.setButton(DialogInterface.BUTTON_POSITIVE, "Hide", new DialogInterface.OnClickListener() {



                @Override

                public void onClick(DialogInterface dialog, int which) {

                        Log.d(TAG, "hide");

                    }

                });

                _progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {

                        @Override

                    public void onClick(DialogInterface dialog, int which) {

                        Log.d(TAG, "cancel");

                        cancelLoad();

                    }

                        private void cancelLoad() {
                            // TODO Auto-generated method stub

                        }

                });

        }

        return _progressDialog;

    }

DIALOG DOWNLOAD PROGRESS在第二次下载尝试时始终显示100％

2 个答案: