Detect Android Navigation Bar orientation
My solution
public static boolean hasNavBar (Resources resources)
{
int id = resources.getIdentifier("config_showNavigationBar", "bool", "android");
if (id > 0)
return resources.getBoolean(id);
else
return false;
}
public static int getNavigationBarHeight (Resources resources)
{
if (!Utils.hasNavBar(resources))
return 0;
int orientation = resources.getConfiguration().orientation;
//Only phone between 0-599 has navigationbar can move
boolean isSmartphone = resources.getConfiguration().smallestScreenWidthDp < 600;
if (isSmartphone && Configuration.ORIENTATION_LANDSCAPE == orientation)
return 0;
int id = resources
.getIdentifier(orientation == Configuration.ORIENTATION_PORTRAIT ? "navigation_bar_height" : "navigation_bar_height_landscape", "dimen", "android");
if (id > 0)
return resources.getDimensionPixelSize(id);
return 0;
}
public static int getNavigationBarWidth (Resources resources)
{
if (!Utils.hasNavBar(resources))
return 0;
int orientation = resources.getConfiguration().orientation;
//Only phone between 0-599 has navigationbar can move
boolean isSmartphone = resources.getConfiguration().smallestScreenWidthDp < 600;
if (orientation == Configuration.ORIENTATION_LANDSCAPE && isSmartphone)
{
int id = resources.getIdentifier("navigation_bar_width", "dimen", "android");
if (id > 0)
return resources.getDimensionPixelSize(id);
}
return 0;
}
Solution based on https://android.googlesource.com/platform/frameworks/base/+/9f65c4c34abb07bdda54649ed510af26f16e9c1b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
Working Solution for me is:
public static boolean hasNavBar(Context context) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Point realPoint = new Point();
Display display = wm.getDefaultDisplay();
display.getRealSize(realPoint);
DisplayMetrics metrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(metrics);
return metrics.heightPixels + metrics.widthPixels != realPoint.y + realPoint.x;
}
public static boolean isSystemBarOnBottom(Context context) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Point realPoint = new Point();
Display display = wm.getDefaultDisplay();
display.getRealSize(realPoint);
DisplayMetrics metrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(metrics);
Configuration cfg = context.getResources().getConfiguration();
boolean canMove = (metrics.widthPixels != metrics.heightPixels &&
cfg.smallestScreenWidthDp < 600);
return (!canMove || metrics.widthPixels < metrics.heightPixels);
}
By using the properties of the decor view in combination with the current DisplayMetrics you can find out on which side the navigation bar is positioned.
// retrieve the position of the DecorView
Rect visibleFrame = new Rect();
getWindow().getDecorView().getWindowVisibleDisplayFrame(visibleFrame);
DisplayMetrics dm = getResources().getDisplayMetrics();
// check if the DecorView takes the whole screen vertically or horizontally
boolean isRightOfContent = dm.heightPixels == visibleFrame.bottom;
boolean isBelowContent = dm.widthPixels == visibleFrame.right;
Based in part on Pauland's answer (in turn based on the implementation of PhoneWindowManager
), here is what I am using at the moment:
public static boolean isSystemBarOnBottom(Context ctxt) {
Resources res=ctxt.getResources();
Configuration cfg=res.getConfiguration();
DisplayMetrics dm=res.getDisplayMetrics();
boolean canMove=(dm.widthPixels != dm.heightPixels &&
cfg.smallestScreenWidthDp < 600);
return(!canMove || dm.widthPixels < dm.heightPixels);
}
This works on a Nexus 7 2012 and a Nexus 4, each running Android 5.1.
On devices that have a permanent MENU key, there is no system bar. Depending upon your use case, you may need to check for this case:
ViewConfiguration.get(ctxt).hasPermanentMenuKey()
(where ctxt
is some Context
)
Personally, I am using this to try to have a sliding panel be on the opposite axis from the system bar, as bezel swipes on the side with the system bar are a bit difficult to trigger. I would not use this, or any other algorithm (like the ones that depend upon getDecorView()
), for anything critical.