Calling a dialog activity to the map activity

Question

I'm working on a Campus Map App. The Map Activity is on the Main Activity, however, I have a different activity for the Custom Dialog. I always get this custom dialog.

When in fact I want it to appear like this.

I have this code for this Activity

public class AdminActivity extends FragmentActivity{

  public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(AdminActivity.this);
    builder.setTitle(R.string.layers)
           .setItems(R.array.layer_options, new DialogInterface.OnClickListener(){
               public void onClick(DialogInterface dialog, int which) {
               // The 'which' argument contains the index position
               // of the selected item
           }
    });
    return builder.create();
  }

  @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_main);

    Dialog dialog=onCreateDialog(savedInstanceState);
    dialog.show();
    }
}

And this code is a part from the main activity where I'm going to call the dialog..

@Override
public boolean onOptionsItemSelected(MenuItem item){
AdminDialog adminDialog;
  switch(item.getItemId()){
    case R.id.about:
        Intent aboutUs = new Intent("com.android.cmumap.ABOUT");
        startActivity(aboutUs);
        break;
    case R.id.search:

        break;
    case R.id.layers:
        adminDialog= new AdminDialog();
        adminDialog.show(getFragmentManager(), "custom-tag-goes-here");
        break;
  }
  return false;
}

How do I achieve calling the map activity for my AdminActivity? Thank You.

Answer 1

Your class should subclass DialogFragment, not FragmentActivity. Be sure to @Override the onCreateDialog(...) method. You can also get rid of your onCreate(...) method as that is not needed with a DialogFragment.

To display the DialogFragment, instead of using an Intent like you would for an Activity, do the following from your map activity. Note that I renamed your class because now it is not an Activity but rather a Dialog:

adminDialog= new AdminDialog();
adnimDialog.show(getFragmentManager(), "custom-tag-goes-here");

Answer 2

Thanks to Sir Nathan Walters

This is for the AdminDialog Activity for the Custom Dialog..

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;

public class AdminDialog extends DialogFragment{

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle(R.string.layers)
           .setItems(R.array.layer_options, new DialogInterface.OnClickListener(){
               public void onClick(DialogInterface dialog, int which) {
               // The 'which' argument contains the index position
               // of the selected item
           }
    });
    return builder.create();
}
}

And I have this for the main activity where the dialog is called..

AdminDialog adminDialog;

adminDialog= new AdminDialog();
adminDialog.show(getFragmentManager(), "custom-tag-goes-here");