Getting screen size return 0

Question

I am trying to get the screen size on my emulator (API 7) with this code:

float scaledDensity = this.getResources().getDisplayMetrics().scaledDensity;

Now I try to use scaledDensity

with this code:

int width = (width / ((int) scaledDensity)) / 7;

and I get this exception

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tomer.workoutlog2/com.example.workoutlog.SimpleCalendarViewActivity}: java.lang.ArithmeticException: divide by zero

Full code:

Display display = ((WindowManager) getSystemService(WINDOW_SERVICE))
                .getDefaultDisplay();
        int width = 0;

        if (android.os.Build.VERSION.SDK_INT >= 13) {
            Point size = new Point();
            display.getSize(size);
            width = size.x;

        } else
            width = display.getWidth();

        float scaledDensity = this.getResources().getDisplayMetrics().scaledDensity;

        width = (width / ((int) scaledDensity)) / 7;

On my real device I don't get this error. Maybe, is the problem with the emulator?

score 0 · Answer 1 · answered Aug 13 '13 at 10:30

0

for API 7 you can use the following code, it is deprecated from API 13

Display display = getWindowManager().getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();

answered Aug 13 '13 at 10:30

DevZer0

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score 0 · Answer 2 · answered Aug 13 '13 at 10:31

0

scaledDensity() returns a float. Sure you are not accidentally doing a integer division with an float less than 1.0f?

answered Aug 13 '13 at 10:31

mach

8,315
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Renan Bandeira · Answer 3 · 2013-08-13T11:05:48.893

0

Try this code:

DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int height = displaymetrics.heightPixels;
int width = displaymetrics.widthPixels;
float scaleFactor = displaymetrics.density;

edited Aug 13 '13 at 11:05

answered Aug 13 '13 at 10:31

Renan Bandeira

3,238
17
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You can have the scaleFactor by this code: `float scaleFactor = displaymetrics.density;` – Renan Bandeira Aug 13 '13 at 11:05

score 0 · Answer 4 · answered Aug 13 '13 at 10:33

Try this...

DisplayMetrics displaymetrics = new DisplayMetrics();
            getActivity().getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
            int height = displaymetrics.heightPixels;
            int width = displaymetrics.widthPixels;

Getting screen size return 0

4 Answers4