CODEWITHSUNDEEP
androidbutton
user1438128
user1438128

Reputation: 533

How to set the width of a button in dp during runtime in android?

I have an android application. There are a lot of buttons in it but these buttons are created during runtime. If i set the width button.setwidth(300) it will set the width to 300px. I want the width to be set in dp. Is there any way around?

Upvotes: 3

Views: 5486

Answers (3)

Ricardo Simmus
Ricardo Simmus

Reputation: 334

Android doen't have separate method for setting button's dimensions in dp. You have to:

//Find screen density scale factor
final float scale = getContext().getResources().getDisplayMetrics().density;
myButton.setWidth((int)(100 * scale));
myButton.setHeight((int)(50 * scale));

Upvotes: 2

Christine
Christine

Reputation: 5575

There's no setWidth(300dp). The workaround is to get the display size, and adjust the 300px variable accordingly.

I must say that there's probably a better way to create a nice layout. Have you tried using nested linearlayouts and layout_weights?

Upvotes: 1

Zaid Daghestani
Zaid Daghestani

Reputation: 8615

You have to use TypedValue.applyDimension to get the pixel count of dp's. Here's an example:

DisplayMetrics dm = getResources().getDisplayMetrics();
float dpInPx = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DP, 300, dm);

That will give the the pixel value of 300dp programmatically.

Cheers

Upvotes: 12

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