how to set width of button with respect to the resolution available on android device

Question

my current android project requires the width of button should be set dynamically depending on the resolution available on device

i want to arrange 9 button in a row but the size will depend on the resolution available

for the current scene we are using below code

    DisplayMetrics displaymetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
    //int sheight = displaymetrics.heightPixels;
    int swidth = displaymetrics.widthPixels;
    int px=swidth/11;
    bW.setWidth(px);
    bE.setWidth(px);
    bR.setWidth(px);
    bT.setWidth(px);
    bY.setWidth(px);
    bU.setWidth(px);
    bI.setWidth(px);
    bO.setWidth(px);
    bP.setWidth(px);

somehow the width of button is not changed in any manner it remains the same

Why don't you just use a horizontal `LinearLayout` and let the OS position and size the buttons for you? — Squonk, Sep 04 '12 at 18:06
for some reason i designed qwerty keypad on the screen if OS positioned and size the button it look wierd — khizar ansari, Sep 04 '12 at 18:23

score 0 · Answer 1 · answered Sep 04 '12 at 17:56

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If i consider you buttons to be images, that you have set using the Selector file, then you need to keep those files in drawable-hdpi, drawable-mdpi, and drawable-ldpi, and the images will accomodate itself according to the available resolution..

answered Sep 04 '12 at 17:56

Kumar Vivek Mitra

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That's not actually true... dpi corresponds to (approximate) pixel density, not resolution. – kabuko Sep 04 '12 at 17:57
@but resolution depends on the density of these pixels in the screen – Kumar Vivek Mitra Sep 04 '12 at 17:59
Nope, not at all unless you're saying density in combination with screen (physical) size. You could have a 800x480 hdpi device or a 1920x1080 hdpi device. Completely different resolutions but the same dpi, one will just be physically larger than the other. – kabuko Sep 04 '12 at 19:02
@KumarVivekMitra do you think that this will arrange desired nine image in a row – khizar ansari Sep 05 '12 at 05:41

score 0 · Answer 2 · edited May 23 '17 at 10:24

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i think you should use android:layout_weight property.Its going to consume space depending on the width available.

set to all the buttons as android:layout_weight="1"

Try this url

Linear Layout and weight in Android

edited May 23 '17 at 10:24

Community

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answered Sep 04 '12 at 19:20

moDev

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if i do that then it will not arrange button in a row another row may be created – khizar ansari Sep 05 '12 at 05:37
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why another row?? suppose you have 5 buttons , set android:weightSum="5" on layout and set android:layout_weight="1" on each button. It will automatically consume the necessary width. – moDev Sep 05 '12 at 12:01

score 0 · Answer 3 · answered Sep 04 '12 at 19:31

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Buttons and other objects that uses a ninepatch image won't get smaller than the ninepatch itself.

Make sure you are using an appropriate ninepatch image for you buttons that will fit the sizes you need.

answered Sep 04 '12 at 19:31

BrainCrash

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i was searching for the button.. means how we can change the width of button programatically on android – khizar ansari Sep 05 '12 at 05:43

score 0 · Accepted Answer · answered Sep 05 '12 at 05:49

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i came up with this solution

    ViewGroup.LayoutParams params = button.getLayoutParams();
    params.width=px;
    button.setLayoutParams(params);

answered Sep 05 '12 at 05:49

khizar ansari

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how to set width of button with respect to the resolution available on android device

4 Answers4