Question

Now I am doing an Android application.In my application I have to get the data from json page.This operation is taking time delay.So I have to show a progressbar until the fetching process is completed.I used the following code to show progressbar.

 public void onCreate(Bundle savedInstanceState) {
//somecode
ProgressDialog progressBar = new ProgressDialog(this);
     progressBar.setCancelable(true);
      progressBar.setMessage("Loading");
      progressBar.show();
      Thread thread = new Thread(this);
      thread.start();

}
 public void run() {
    flag=GetFixtureDetailsJsonFunction();
    handler.sendEmptyMessage(0);
}
protected boolean GetFixtureDetailsJsonFunction() {
//json parsing code
return true
}
private Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        if (flag==true) {
            progressBar.dismiss();
        }


    }
};

Using this code I am getting exception.android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

Answer 1

AsyncTask is best way for getting response from xml or database. try like this,

private class DownloadQuestion extends AsyncTask<String, Void, String> 
    {           

        @Override
        protected void onPreExecute() 
        {

            pd = ProgressDialog.show(Activity_SplashScreen.this, "","Please wait...", true,false);                    

            super.onPreExecute();
        }

        @Override
        protected String doInBackground(String... urls) 
        {
            //Write background code here Code 
            return "";
        }

        @Override
        protected void onPostExecute(String response1) 
        {
            //Some Code.....

            if (pd != null && pd.isShowing())
                pd.dismiss();

        }
    }