How to set ImageView and TextView in OnPostMethod of AsyncClass - android-layout

Question

I want to set image and text in imageview and textview in the OnPostMethod of AsyncClass, like I am doing some network operations in "do in background" method, and on a particular response I just want to populate imageviews and textviews with particular images and texts.
Can someone tell me how to set image in OnPostMethod. I wonder if someone can tell me the mistake I am making in the following code
public class testing_async extends Activity {
private ProgressDialog progressDialog;
String s;
ImageView im;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.testing_async);
new GetCategoryList().execute(s);
im = (ImageView) findViewById(R.id.im1);
}
//
// THE AsyncTask Class for GetCategoryList....
//
class GetCategoryList extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// showDialog(progress_bar_type);
progressDialog = ProgressDialog.show(testing_async.this, "",
"Loading...");
}
#Override
protected String doInBackground(String... f_url) {
/*
* LinearLayout layout = new LinearLayout(testing_async.this);
* layout = new LinearLayout(testing_async.this);
* layout.setLayoutParams(new ViewGroup.LayoutParams(
* ViewGroup.LayoutParams.FILL_PARENT,
* ViewGroup.LayoutParams.FILL_PARENT));
*
* RelativeLayout inner_layout = new
* RelativeLayout(testing_async.this); inner_layout = new
* RelativeLayout(testing_async.this); layout.setLayoutParams(new
* ViewGroup.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT,
* ViewGroup.LayoutParams.FILL_PARENT));
*
* ImageView im = new ImageView(testing_async.this);
* im.setImageResource(R.drawable.logo_background);
* RelativeLayout.LayoutParams layoutParams90 = new
* RelativeLayout.LayoutParams( 225, 250); layoutParams90.leftMargin
* = 45; layoutParams90.topMargin = 45;
* im.setLayoutParams(layoutParams90); inner_layout.addView(im);
* layout.addView(inner_layout);
*/
return null;
}
protected void onProgressUpdate(String... progress) {
}
#Override
protected void onPostExecute(String file_url) {
im.setBackgroundResource(R.drawable.back);
progressDialog.dismiss();
}
}
}

Answer 1

Context mContext;
ImageView im;
public GetCategoryList(Context context, ImageView myIm) {
this.mContext = context;
this.im = myIml;
}
Add the custom constructor above to your async task. This way you have a context and a reference to your imageView. It will be needed in order to get the resource.
Second, all the commented code should be placed inside "onCreate".
Finally, you can assign a drawable to your imageView using
im.setBackgroundResource(mContext.getResources().getDrawable(R.drawable.bBack));
Hope this helps.
P.S. NEVER change layout in "doInBackground". Your app will crash.

Answer 2

if you are setting image
then you have to give im.setBackgroundResource(R.drawable.bBack);
you are setting id not image in your code.