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px、dp、sp转换And屏幕相关信息获取工具类

px、dp、sp转换And屏幕相关信息获取工具类

作者: 花花是男神 | 来源:发表于2019-05-10 15:22 被阅读0次
    • 1、px、dp、sp相互转换方法
    • 2、屏幕宽高px dp获取方法
    • 3、屏幕密度 dpi获取方法
    /**
     * @author: huchunhua
     * @time: 2019/5/9
     * @package:
     * @project: 
     * @mail: huachunhu@qq.com
     * @describe: px、dp、sp转换And屏幕相关信息获取工具类
     */
    public class DisplayUtil {
    
        private static final String TAG = "DisplayUtil";
    
        /**
         * 获取屏幕密度(0.75 / 1.0 / 1.5)
         * @param context
         * @return
         */
        public float getScreenDensity(Context context) {
            WindowManager wm = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            float density = dm.density;         // 屏幕密度(0.75 / 1.0 / 1.5)
            Log.d(TAG, "getScreenDensity: density = " + density);
            return density;
    
        }
    
        /**
         * 获取屏幕密度(0.75 / 1.0 / 1.5)
         * @param context
         * @return
         */
        public int getScreenDensityDpi(Context context) {
            WindowManager wm = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int densityDpi = dm.densityDpi;     // 屏幕密度dpi(120 / 160 / 240)
            Log.d(TAG, "getScreenDensityDpi: densityDpi = " + densityDpi);
            return densityDpi;
    
        }
    
        /**
         *  获取屏幕宽度 单位dp
         * @param context
         * @return
         */
        public int getDpScreenWidth(Context context){
            WindowManager wm = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int width = dm.widthPixels;         // 屏幕宽度(像素)
            float density = dm.density;         // 屏幕密度(0.75 / 1.0 / 1.5)
            // 屏幕宽度算法:屏幕宽度(像素)/屏幕密度
            int screenWidth = (int) (width / density);  // 屏幕宽度(dp)
            Log.d(TAG, "getPxScreenWidth: screenWidth = " + screenWidth);
            return screenWidth;
        }
    
        /**
         *  获取屏幕宽度 单位px
         * @param context
         * @return
         */
        public int getPxScreenWidth(Context context){
            WindowManager wm = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int width = dm.widthPixels;         // 屏幕宽度(像素)
            Log.d(TAG, "getPxScreenWidth: width = " + width);
            return width;
        }
    
        /**
         *  获取屏幕高度 单位px
         * @param context
         * @return
         */
        public int getPxScreenHeight(Context context){
            WindowManager wm = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int height = dm.heightPixels;       // 屏幕高度(像素)
            Log.d(TAG, "getPxScreenHeight: height = " + height);
            return height;
        }
    
        /**
         *  获取屏幕高度 单位dp
         * @param context
         * @return
         */
        public int getDpScreenHeight(Context context){
            WindowManager wm = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int height = dm.heightPixels;       // 屏幕高度(像素)
            float density = dm.density;         // 屏幕密度(0.75 / 1.0 / 1.5)
            // 屏幕宽度算法:屏幕宽度(像素)/屏幕密度
            int screenHeight = (int) (height / density);// 屏幕高度(dp)
            Log.d(TAG, "getDpScreenHeight: screenHeight = " + screenHeight);
            return screenHeight;
        }
    
        /**
         * 将px值转换为dip或dp值,保证尺寸大小不变
         *
         * @param pxValue
         *            (DisplayMetrics类中属性density)
         * @return
         */
        public static int px2dip(Context context, float pxValue) {
            final float scale = context.getResources().getDisplayMetrics().density;
            return (int) (pxValue / scale + 0.5f);
        }
    
        /**
         * 将dip或dp值转换为px值,保证尺寸大小不变
         *
         * @param dipValue
         *            (DisplayMetrics类中属性density)
         * @return
         */
        public static int dip2px(Context context, float dipValue) {
            final float scale = context.getResources().getDisplayMetrics().density;
            return (int) (dipValue * scale + 0.5f);
        }
    
        /**
         * 将px值转换为sp值,保证文字大小不变
         *
         * @param pxValue
         *            (DisplayMetrics类中属性scaledDensity)
         * @return
         */
        public static int px2sp(Context context, float pxValue) {
            final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
            return (int) (pxValue / fontScale + 0.5f);
        }
    
        /**
         * 将sp值转换为px值,保证文字大小不变
         *
         * @param spValue
         *            (DisplayMetrics类中属性scaledDensity)
         * @return
         */
        public static int sp2px(Context context, float spValue) {
            final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
            return (int) (spValue * fontScale + 0.5f);
        }
    
        public void getScreenProperty(Context context) {
            WindowManager wm = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int width = dm.widthPixels;         // 屏幕宽度(像素)
            int height = dm.heightPixels;       // 屏幕高度(像素)
            float density = dm.density;         // 屏幕密度(0.75 / 1.0 / 1.5)
            int densityDpi = dm.densityDpi;     // 屏幕密度dpi(120 / 160 / 240)
            // 屏幕宽度算法:屏幕宽度(像素)/屏幕密度
            int screenWidth = (int) (width / density);  // 屏幕宽度(dp)
            int screenHeight = (int) (height / density);// 屏幕高度(dp)
    
    
            Log.d(TAG, "屏幕宽度(像素):" + width);
            Log.d(TAG, "屏幕高度(像素):" + height);
            Log.d(TAG, "屏幕密度(0.75 / 1.0 / 1.5):" + density);
            Log.d(TAG, "屏幕密度dpi(120 / 160 / 240):" + densityDpi);
            Log.d(TAG, "屏幕宽度(dp):" + screenWidth);
            Log.d(TAG, "屏幕高度(dp):" + screenHeight);
        }
    }
    
    

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          本文标题:px、dp、sp转换And屏幕相关信息获取工具类

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