Android 获得屏幕的宽高

 private DisplayMetrics getWithAndHeight(Context context){
        DisplayMetrics displayMetrics = new DisplayMetrics();
        WindowManager windowManager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
        windowManager.getDefaultDisplay().getMetrics(displayMetrics);
        return displayMetrics;
 }

        //get in the function where you need
        DisplayMetrics displayMetrics = getWithAndHeight(getActivity());
        widthPixels = displayMetrics.widthPixels;
        heightPixels = displayMetrics.heightPixels;