CODEWITHSUNDEEP
androidandroid-layoutandroid-dialog
Eternal Learner
Eternal Learner

Reputation: 2632

What makes a dialog displayable?

I have a very simple dialog defined as:

import android.app.AlertDialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;

public class MyDialog{

  private String promptReply = null; // local variable to return the prompt reply value

  public String showAlert(String ignored, Context ctx)
  {
    LayoutInflater li = LayoutInflater.from(ctx);
    View view = li.inflate(R.layout.promptdialog, null);

    AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
    builder.setTitle("Dialog Title");
    builder.setView(view);

    builder.setPositiveButton("OK", (myActivity)ctx);
    builder.setNegativeButton("Cancel", (myActivity)ctx);

    AlertDialog ad = builder.create();

    ad.show();
    return "dummystring";    
  }
}

And when I try to display it in onCreate() after calling setContentView() for the activity's main layout, the dialog simply doesn't show:

MyDialog dialog = new MyDialog();
dialog.showAlert("Why isn't this shown???", this);

On the other hand, if I place the same exact call before calling setContentView() for the activity's main layout, the dialog shows just fine.

My question is why?

Why is the order critical in this case?

What am I missing?

Upvotes: 3

Views: 149

Answers (1)

Rahul garg
Rahul garg

Reputation: 9362

In your code to inflate view, use something like this:

View layout = inflater.inflate(R.layout.promptdialog,
                           (ViewGroup) findViewById(R.id.layout_root));

where layout_root is the id of top level layout of your custom dialog.

Upvotes: 2

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