How to set button options programmatically

Question

I am trying to add a few buttons to a layout like this:

for( int i = 0; i < 10; i++ ) { Button button = new Button( this ); button.setText( "" + i ); ( ( LinearLayout )dialog.findViewById( R.id.Buttons ) ).addView( button ); } 

My problem is how can I do this programmatically for all buttons:

 <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:textSize="32dip" /> 

I am looking at LayoutParams, but it does not look complete. For example, how do I set textSize to 32 dip?

Answer 1

Set your attributes with the following code:

 LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); button.setLayoutParams(params); button.setGravity(Gravity.CENTER_HORIZONTAL); button.setTextSize(32); 

If you want to specify text size units, use:

 button.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 32); 

Answer 2

LayoutParams refers to the parent ViewGroup that will contain the view. Therefore, in your case, this is LinearLayout , so you need to create parameters for this. This is what I am talking about:

 LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); lp.weight = 1f; Button button = new Button(this); button.setLayoutParams(lp); button.setText("" + i); ((LinearLayout)dialog.findViewById(R.id.Buttons)).addView(button); 

Answer 3

Use LayoutParams for height, width and gravity with

 LinearLayout.LayoutParams (int width, int height) 

where you can use WRAP_CONTENT for ints.

Then for the last two there is Button.setGravity() and Button.setTextSize() .

Hope this helps.

Answer 4

You would use the LayoutParams object for layout options and use the setTextSize () from the Button class to set the text size.

You can set gravity with setGravity () .

Answer 5

TextSize is not part of the layout options. To set textSize you must

 button.setTextSize(32);