Showing a Progress dialog using DialogFragment in Android

ProgressDialogFragment.java

public class ProgressDialogFragment extends DialogFragment {

	public static LoadingDialogFragment newInstance() {
		ProgressDialogFragment frag = new ProgressDialogFragment ();
		return frag;
	}

	@Override
	public Dialog onCreateDialog(Bundle savedInstanceState) {

		final ProgressDialog dialog = new ProgressDialog(getActivity());
		dialog.setMessage(getString(R.string.loading_text));
		dialog.setIndeterminate(true);
		dialog.setCancelable(false);

		// Disable the back button
		OnKeyListener keyListener = new OnKeyListener() {

			@Override
			public boolean onKey(DialogInterface dialog, int keyCode,
					KeyEvent event) {
				
				if( keyCode == KeyEvent.KEYCODE_BACK){					
					return true;
				}
				return false;
			}

		
		};
		dialog.setOnKeyListener(keyListener);
		return dialog;
	}

}

"public static LoadingDialogFragment newInstance() {" must be changed to "ProgressDialogFragment"

onKey method body could be simplified to return keyCode == KeyEvent.KEYCODE_BACK;

to make it uncancellable you can use

this.setCancelable(false);

instead of

// Disable the back button
OnKeyListener keyListener = new OnKeyListener() { 
  @Override
  public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
   ...
  } 
};
dialog.setOnKeyListener(keyListener);

also dialog.setCancelable(false); is useless

Agreed with Sash0k, shortens code just go setCancelable(false);

Should also call dialog.setCanceledOnTouchOutside(false), otherwise user can dismiss it

Added an updated gist with the fixes above.
1- "public static LoadingDialogFragment newInstance() {" must be changed to "ProgressDialogFragment".
2- We use this.setCancelable(false); to make it uncancellable rather than the OnKeyListener and add this as an option when creating a new instance.
3- An option to set a message when creating an instance.
...

https://gist.github.com/hegazy/796ba03d98b9ee68fab1