android - convert dp to float

Question

My font size is 12dp.

I'm setting the font using TextPaint, since I'm using a span. The problem is the parameter that TextPaint accepts is in float. I'm wondering how can I convert 12 dp to float?

score 21 · Answer 1 · edited Jan 17 '17 at 06:47

21

From android.content.res.Resources.getDimension(int id):

float twelveDp = TypedValue.applyDimension( TypedValue.COMPLEX_UNIT_DIP, 12, 
                mContext.getResources().getDisplayMetrics() );

edited Jan 17 '17 at 06:47

Saugat Bhattarai

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answered Nov 18 '16 at 01:58

SleepyTonic

506
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11

applyDimension (int unit, FLOAT value...) not DP. This solution convert float to float, not DP to float. – Cipo Apr 08 '22 at 08:38

score 9 · Answer 2 · edited Jan 17 '17 at 05:35

9

Try this:

public static float dipToPixels(Context context, float dipValue){
    DisplayMetrics metrics = context.getResources().getDisplayMetrics();
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,  dipValue, metrics);
}

edited Jan 17 '17 at 05:35

Saugat Bhattarai

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4
24
33

answered Jan 17 '17 at 05:22

Sachin Suthar

692
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28

grigorz · Answer 3 · 2017-01-16T22:56:13.060

3

You can try following:

// Convert the sp to pixels

final float scale = getResources().getDisplayMetrics().scaledDensity;
int mTextSizeP = (int)  getResources().getDimensionPixelSize(R.dimen.text_size) / scale );

I have already have text_size defined in res/values/dimens.xml :

<resources>
    <dimen name="text_size">12sp</dimen>
</resources>

edited Jan 16 '17 at 22:56

answered Oct 25 '16 at 11:50

grigorz

31
4

android - convert dp to float

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