How to get screen width and height

Question

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

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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

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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

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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

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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

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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

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int scrWidth    getWindowManager   getDefaultDisplay   getWidth        int scrHeight   getWindowManager   getDefaultDisplay   getHeight

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if  Build VERSION SDK INT  gt   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

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This is what finally worked for me   DisplayMetrics metrics   this getResources   getDisplayMetrics    int width   metrics widthPixels  int height   metrics heightPixels

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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

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Try via context getResources   getDisplayMetrics   if you have a context available

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From service   Display  display    WindowManager  getSystemService Context WINDOW SERVICE   getDefaultDisplay    int width   display getWidth     int height   display getHeight

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Display display   getActivity   getWindowManager   getDefaultDisplay     int screenWidth   display getWidth    int screenHeight   display getHeight    Log d  Tag    Getting Width  gt  gt      screenWidth   Log d  Tag    Getting Height  gt  gt      screenHeight     This worked properly in my application

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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     See demo source code

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below answer support api level below and above 10   if  Build VERSION SDK INT  gt   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

[android] How to get screen width and height

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