How to set layout params to units dp android

Question

mainLayout = (LinearLayout) findViewById(R.id.linearLayout);
mChart = new HorizontalBarChart(this);
mChart.setLayoutParams(new ViewGroup.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));
mainLayout.addView(mChart);

I like to change the width and height to dp units like 100 dp or 200 dp,. the setLayoutParams doesn't take number units , the choices are only (wrap_content and match_content).. I'm new to Android so im confused how to change it.

`float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, resources.getDisplayMetrics());` this way you can convert dp to pixels — Muhammad Babar, Feb 12 '16 at 10:24
Does this answer your question? [How to set Layoutparams height/width in dp value?](https://stackoverflow.com/questions/41659338/how-to-set-layoutparams-height-width-in-dp-value) — Tatsuya Fujisaki, Jun 23 '21 at 04:44

score 18 · Answer 1 · answered Feb 12 '16 at 03:30

18

Another ways is you add your dimension in dimens.xml.

For example, add <dimen name="chart_width">100dp</dimen>.

Then, at your code:

float width = getResources().getDimension(R.dimen.chart_width);
mChart.setLayoutParams(new ViewGroup.LayoutParams(
            width,
            ViewGroup.LayoutParams.WRAP_CONTENT));

answered Feb 12 '16 at 03:30

Joey Chong

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20

2

`layoutParams.width` expects and `int` so you may need to cast the `getResources...` with `(int)`. – Fat Monk Aug 18 '19 at 20:42

blueware · Answer 2 · 2019-11-23T05:19:59.880

9

Converting dip values into pixels will let your layout build correctly, this line of code will solve it:

int width = (int) TypedValue.applyDimension(
    TypedValue.COMPLEX_UNIT_DIP, 
    getResources().getDimension(R.dimen.desired_width), 
    getResources().getDisplayMetrics()
);

edited Nov 23 '19 at 05:19

answered Oct 05 '16 at 12:30

blueware

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theapache64 · Answer 3 · 2016-02-12T11:50:15.687

3

I think we can't set dp directly to the view. So we've to convert the dimension from pixel to dp.

To get pixel from dp, you can use TypedValue#applyDimension() method.

Resources r = getResources();
float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, {sizeInDp}, r.getDisplayMetrics());

So the final code will be

float width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, {widthInDp}, r.getDisplayMetrics());

float height = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, {heightInDp}, r.getDisplayMetrics());

mChart.setLayoutParams(new ViewGroup.LayoutParams(
                width,
                height));

edited Feb 12 '16 at 11:50

answered Feb 12 '16 at 03:04

theapache64

10,926
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where can i set the width to 100 dp for example? – Ruby Feb 12 '16 at 03:12
1

`float width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, r.getDisplayMetrics());` and apply `mChart.setLayoutParams(new ViewGroup.LayoutParams( width, ViewGroup.LayoutParams.WRAP_CONTENT));` , got it ? – theapache64 Feb 12 '16 at 03:36
1

@AxeFox, You answer also correct but I think little bit misleading. {widthInPixel} should change {withInDP} because it convert from DP to pixels. Correct me if I am wrong. – Joey Chong Feb 12 '16 at 03:46
1

@JoeyChong You're absolutely correct, I didn't noticed that mistake. I'll correct it now. and thank you for the correction Joey. :) – theapache64 Feb 12 '16 at 11:49
1

Worked like a charm! Enormous help by this! Thanks a lot theapache64! – Tomas F. Jul 24 '23 at 16:34

M Karimi · Answer 4 · 2019-10-01T07:07:31.917

0

int dp1 = dip2pix(getContext(), 1);
FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(
            dp1 * 100, ViewGroup.LayoutParams.WRAP_CONTENT);

public static int dip2pix(@NonNull Context context, int dip) {
    return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip,
            context.getResources().getDisplayMetrics());
}

edited Oct 01 '19 at 07:07

answered Sep 29 '19 at 11:14

M Karimi

1,991
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score -3 · Answer 5 · answered Feb 12 '16 at 05:08

Give it a try it will work for sure

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                200, 200);
        params.setMargins(5, 0, 5, 0);

        mChart= new HorizontalBarChart(getApplicationContext());
        mChart.setLayoutParams(params);

        mainLayout.addView(mChart);

How to set layout params to units dp android

5 Answers5