How to get actual screen size after Android N?

问题

Since Android N introduces split screen, the window size of your app can be half of the original. I found that getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics); no longer always returns the actual device screen size anymore because in split screen mode the display's height will be your app's window height instead. Is there any other API I can use to get the actual screen size?

回答1:

Display.getRealMetrics(DisplayMetrics) will return the actual display size.

回答2:

You can get real device size in Multi-Window Mode using Display or DisplayMetrics.

Using Display:

private void findRealSize(Activity activity)
{
    Point size = new Point();
    Display display = activity.getWindowManager().getDefaultDisplay();

    if (Build.VERSION.SDK_INT >= 17)
        display.getRealSize(size);
    else
        display.getSize(size);

    int realWidth = size.x;
    int realHeight = size.y;

    Log.i("LOG_TAG", "realWidth: " + realWidth + " realHeight: " + realHeight);
}

Using DisplayMetrics:

private void findRealSize(Activity activity)
{
    DisplayMetrics displayMetrics = new DisplayMetrics();

    if (Build.VERSION.SDK_INT >= 17)
    {
        activity.getWindowManager().getDefaultDisplay().getRealMetrics(displayMetrics);
    }
    else
    {
        activity.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
    }

    int realWidth = displayMetrics.widthPixels;
    int realHeight = displayMetrics.heightPixels;

    Log.i("LOG_TAG", "realWidth: " + realWidth + " realHeight: " + realHeight);
}

回答3:

By the moment I couldn't find a proper solution for that at all, but I'm handling it by the densityDpi of every resolution which is changed. Just like this:

private int getScreenDensityDPI() {
    DisplayMetrics metrics = new DisplayMetrics();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        getWindowManager().getDefaultDisplay().getRealMetrics(metrics);
    } else {
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
    }
    return metrics.densityDpi;
}

private int getNumberItemsByScreenResolution() {
    int densityDPI = getScreenDensityDPI();
    if (densityDPI <= 140) {
        return 6;
    } else if (densityDPI <= 160) {
        return 5;
    } else {
        return 4;
    }
}

While lowest the densityDPI is, highest the resolution of the display will be in your android N device.

来源：https://stackoverflow.com/questions/36706365/how-to-get-actual-screen-size-after-android-n

标签

android

android-7.0-nougat