px、dp、sp转换And屏幕相关信息获取工具类

  • 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: [email protected]
 * @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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