Question

I have a problem with a custom dialog implemented as below:

    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);

    dialogBuilder.setTitle("Title");
    dialogBuilder.setMessage("Message");

    LinearLayout layout = new LinearLayout(this);
    layout.setOrientation(LinearLayout.VERTICAL);
    layout.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);

    // Set an EditText view to get user input
    EditText input = new EditText(this);
    input.setHeight(LayoutParams.WRAP_CONTENT);
    input.setWidth(LayoutParams.MATCH_PARENT);
    layout.addView(input);

    TextView text = new TextView(this);
    text.setText("show some text here");
    text.setHeight(LayoutParams.WRAP_CONTENT);
    text.setWidth(LayoutParams.MATCH_PARENT);
    //text.setHeight(50);
    //text.setWidth(150);
    text.setVisibility(TextView.VISIBLE);
    layout.addView(text);

    Button btn = new Button(this);
    btn.setText("Button");
    btn.setHeight(LayoutParams.WRAP_CONTENT);
    btn.setWidth(LayoutParams.WRAP_CONTENT);
    layout.addView(btn);

    dialogBuilder.setView(layout);
    dialogBuilder.setPositiveButton("Ok", null);

    AlertDialog myDialog = dialogBuilder.create();
    myDialog.show();

The problem is that the TextView text doesn’t show up in the dialog if I set its width and height as in the code above. It only appears if I hard code the properties (the two commented lines), but that’s not the desired behavior.

Also, although the Button has the width set as WRAP_CONTENT, it is as big as the screen.

Could someone please point out what I’m doing wrong here?

Answer 1

You should use setLayoutParams() and not setHeight() and setWidth()

Replace

text.setHeight(LayoutParams.WRAP_CONTENT);
text.setWidth(LayoutParams.MATCH_PARENT);

With this

text.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));

EDIT:
About the Button use :

btn.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

It works to me…

EDIT 2:
If you use text.setHeight(LayoutParams.WRAP_CONTENT); it is equal to text.setHeight(-2); so your textView will be -2 pixel height and won’t be visible… on the other hands Buttons and other that uses a ninepatch image won’t get smaller than the ninepatch itself.