How to set margin with dp size in Android

Question

I want set margin for views by programmatically, i should set 50dp for margin_top, i use this code

ViewGroup.MarginLayoutParams marginParams = new ViewGroup.MarginLayoutParams(searchView.getLayoutParams());
                    marginParams.setMargins(0, 75, 0, 0);
                    CoordinatorLayout.LayoutParams layoutParams = new CoordinatorLayout.LayoutParams(marginParams);
                    searchView.setLayoutParams(layoutParams);

but in this code set 50px! how can i set this 50dp, not px?!

Possible duplicate of [In Android, how do I set margins in dp programmatically](http://stackoverflow.com/questions/12728255/in-android-how-do-i-set-margins-in-dp-programmatically) — Harshad Pansuriya, Oct 18 '16 at 08:47

score 4 · Accepted Answer · answered Oct 18 '16 at 08:46

4

You have to convert it:

final float scale = getContext().getResources().getDisplayMetrics().density;
int pixels = (int) (dps * scale + 0.5f);

answered Oct 18 '16 at 08:46

klijakub

845
11
31

can you edit your codes with my codes ? i want set 50dp – zzz Oct 18 '16 at 08:48

score 2 · Answer 2 · answered Oct 18 '16 at 08:55

2

For dimens.xml:

context.getResources().getDimensionPixelSize(R.dimen.view_height);

For harcoded value:

int height = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50,
               getContext().getResources().getDisplayMetrics());

answered Oct 18 '16 at 08:55

Barış Söbe

470
4
7

score 1 · Answer 3 · answered Oct 18 '16 at 08:50

1

public static int dp(int px) {
    return (int) (px * Resources.getSystem().getDisplayMetrics().density);
}
int margin = dp(50);

answered Oct 18 '16 at 08:50

mstrengis

829
5
15

score 0 · Answer 4 · answered Oct 18 '16 at 08:48

0

Use this code:

 /**
 * Convert dp to pixel
 *
 * @param dp
 * @return px
 */
public static int dpToPx(final float dp) {
    return Math.round(dp * (Resources.getSystem().getDisplayMetrics().xdpi / DisplayMetrics.DENSITY_DEFAULT));
}

answered Oct 18 '16 at 08:48

Simon Schubert

2,010
19
34

yt.lee · Answer 5 · 2016-10-18T08:50:23.283

0

private int dp2px(int dp) {
    return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,getResources().getDisplayMetrics());

convert it!

edited Oct 18 '16 at 08:50

answered Oct 18 '16 at 08:48

yt.lee

11
1

score 0 · Answer 6 · answered Nov 27 '19 at 20:42

Here's a Kotlin solution

You can use the following function:

fun dpToPx(context: Context, dp: Float): Int {
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, context.resources.displayMetrics).roundToInt()
}

You could choose to take advantage of extensions instead:

// Use: 16f.dpToPx(context)
internal fun Float.dpToPx(context: Context): Int {
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, this, context.resources.displayMetrics).roundToInt()
}

Or if using a dimens resource, use the following:

context.resources.getDimensionPixelSize(R.dimen.some_dimen_id)

How to set margin with dp size in Android

6 Answers6