How to get screen width and height
AndroidAndroid LayoutAndroid EmulatorAndroid ActivityAndroid WidgetAndroid Problem Overview
I tried to use following code to get screen width and height in android app development:
Display display = getWindowManager().getDefaultDisplay();
int screenWidth = display.getWidth();
int screenHeight = display.getHeight();
but I got NullPointerException for my display, why? how to get screen width and height then?
Android Solutions
Solution 1 - Android
If you're calling this outside of an Activity, you'll need to pass the context in (or get it through some other call). Then use that to get your display metrics:
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
int width = metrics.widthPixels;
int height = metrics.heightPixels;
UPDATE: With API level 17+, you can use getRealSize:
Point displaySize = new Point();
activity.getWindowManager().getDefaultDisplay().getRealSize(displaySize);
If you want the available window size, you can use getDecorView to calculate the available area by subtracting the decor view size from the real display size:
Point displaySize = new Point();
activity.getWindowManager().getDefaultDisplay().getRealSize(displaySize);
Rect windowSize = new Rect();
ctivity.getWindow().getDecorView().getWindowVisibleDisplayFrame(windowSize);
int width = displaySize.x - Math.abs(windowSize.width());
int height = displaySize.y - Math.abs(windowSize.height());
return new Point(width, height);
getRealMetrics may also work (requires API level 17+), but I haven't tried it yet:
DisplayMetrics metrics = new DisplayMetrics();
activity.GetWindowManager().getDefaultDisplay().getRealMetrics(metrics);
Solution 2 - Android
Within an activity, you can call:
int width = this.getResources().getDisplayMetrics().widthPixels;
int height = this.getResources().getDisplayMetrics().heightPixels;
When you're in a View, then you need to get the Context first:
int width = getContext().getResources().getDisplayMetrics().widthPixels;
int height = getContext().getResources().getDisplayMetrics().heightPixels;
This will work in all Android version, available since API 1, and never deprecated.
Solution 3 - Android
From service:
Display display= ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();
Solution 4 - Android
This is what finally worked for me:
DisplayMetrics metrics = this.getResources().getDisplayMetrics();
int width = metrics.widthPixels;
int height = metrics.heightPixels;
Solution 5 - Android
Try via context.getResources().getDisplayMetrics() if you have a context available.
Solution 6 - Android
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int height = metrics.heightPixels;
int width = metrics.widthPixels;
i guess the code which you wrote is deprecated.
Solution 7 - Android
if (Build.VERSION.SDK_INT >= 11) {
Point size = new Point();
try {
this.getWindowManager().getDefaultDisplay().getRealSize(size);
screenWidth = size.x;
screenHeight = size.y;
} catch (NoSuchMethodError e) {
screenHeight = this.getWindowManager().getDefaultDisplay().getHeight();
screenWidth=this.getWindowManager().getDefaultDisplay().getWidth();
}
} else {
DisplayMetrics metrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(metrics);
screenWidth = metrics.widthPixels;
screenHeight = metrics.heightPixels;
}
Solution 8 - Android
Try with the following code to get width and height of screen
int widthOfscreen =0;
int heightOfScreen = 0;
DisplayMetrics dm = new DisplayMetrics();
try {
((Activity) context).getWindowManager().getDefaultDisplay()
.getMetrics(dm);
} catch (Exception ex) {
}
widthOfscreen = dm.widthPixels;
heightOfScreen = dm.heightPixels;
Solution 9 - Android
WindowManager w = getWindowManager();
Display d = w.getDefaultDisplay();
DisplayMetrics metrics = new DisplayMetrics();
d.getMetrics(metrics);
Log.d("WIDTH: ", String.valueOf(d.getWidth()));
Log.d("HEIGHT: ", String.valueOf(d.getHeight()));
Solution 10 - Android
/*
*DisplayMetrics: A structure describing general information about a display, such as its size, density, and font scaling.
* */
DisplayMetrics metrics = getResources().getDisplayMetrics();
int DeviceTotalWidth = metrics.widthPixels;
int DeviceTotalHeight = metrics.heightPixels;
Solution 11 - Android
int scrWidth = getWindowManager().getDefaultDisplay().getWidth();
int scrHeight = getWindowManager().getDefaultDisplay().getHeight();
Solution 12 - Android
Display display = getActivity().getWindowManager().getDefaultDisplay();
int screenWidth = display.getWidth();
int screenHeight = display.getHeight();
Log.d("Tag", "Getting Width >> " + screenWidth);
Log.d("Tag", "Getting Height >> " + screenHeight);
This worked properly in my application
Solution 13 - Android
Alternative way using function
private int[] getScreenSIze(){
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int h = displaymetrics.heightPixels;
int w = displaymetrics.widthPixels;
int[] size={w,h};
return size;
}
on button click or on your create function add the following code
int[] screenSize= getScreenSIze();
int width=screenSize[0];
int height=screenSize[1];
screenSizes.setText("Phone Screen sizes \n\n width = "+width+" \n Height = "+height);
Solution 14 - Android
below answer support api level below and above 10
if (Build.VERSION.SDK_INT >= 11) {
Point size = new Point();
try {
this.getWindowManager().getDefaultDisplay().getRealSize(size);
screenWidth = size.x;
screenHeight = size.y;
} catch (NoSuchMethodError e) {
screenHeight = this.getWindowManager().getDefaultDisplay().getHeight();
screenWidth=this.getWindowManager().getDefaultDisplay().getWidth();
}
} else {
DisplayMetrics metrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(metrics);
screenWidth = metrics.widthPixels;
screenHeight = metrics.heightPixels;
}