Android DisplayMetrics returns incorrect screen size in pixels on ICS

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From the answer of Ahmed, this is full code without error:

    int width = 0, height = 0;
    final DisplayMetrics metrics = new DisplayMetrics();
    Display display = getWindowManager().getDefaultDisplay();
    Method mGetRawH = null, mGetRawW = null;

    try {
        // For JellyBean 4.2 (API 17) and onward
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
            display.getRealMetrics(metrics);

            width = metrics.widthPixels;
            height = metrics.heightPixels;
        } else {
            mGetRawH = Display.class.getMethod("getRawHeight");
            mGetRawW = Display.class.getMethod("getRawWidth");

            try {
                width = (Integer) mGetRawW.invoke(display);
                height = (Integer) mGetRawH.invoke(display);
            } catch (IllegalArgumentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    } catch (NoSuchMethodException e3) {  
        e3.printStackTrace();
    }

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