获取屏幕宽高,和dp,px,sp的转化工具类

来源：互联网发布：c语言基础代码编辑：程序博客网时间：2024/06/06 14:18
在项目适配中我们经常会用到dp装px来适应屏幕,还有就是在我们自定义View中的绘画也需要适配.
代码如下:
import java.lang.reflect.Field;import android.app.Activity;import android.app.ActivityManager;import android.content.Context;import android.util.DisplayMetrics;import android.util.Log;import android.view.WindowManager;/** * 屏幕尺寸, 像素 , * @author Administrator * */public final class ScreenUtil {/** * dp 转 px * @param context * @param dipValue * @return */public static int dip2px(Context context, float dipValue) {final float scale = context.getResources().getDisplayMetrics().density;return (int) (dipValue * scale + 0.5f);}/** * px 转 dp * @param context * @param pxValue * @return */public static int px2dip(Context context, float pxValue) {final float scale = context.getResources().getDisplayMetrics().density;return (int) (pxValue / scale + 0.5f);}/** * px 转 sp *  * @param pxValue * @return */public static int px2sp(Context context, float pxValue) {final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;return (int) (pxValue / fontScale + 0.5f);}/** * sp 转 px *  * @param spValue * @return */public static int sp2px(Context context, float spValue) {final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;return (int) (spValue * fontScale + 0.5f);}@SuppressWarnings("deprecation")public static int getWindowsW(Context context) {WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);return wm.getDefaultDisplay().getWidth();}public static float getScreenDensity(Activity context) {DisplayMetrics dm = new DisplayMetrics();context.getWindowManager().getDefaultDisplay().getMetrics(dm);return dm.density;}@SuppressWarnings("deprecation")public static int getWindowsH(Context context) {WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);return wm.getDefaultDisplay().getHeight();}/** * 获取状态栏高度 * @param context * @return */public static int getStatusHeight(Context context) {Class<?> c = null;Object obj = null;Field field = null;int x = 0, sbar = 0;try {c = Class.forName("com.android.internal.R$dimen");obj = c.newInstance();field = c.getField("status_bar_height");x = Integer.parseInt(field.get(obj).toString());sbar = context.getResources().getDimensionPixelSize(x);} catch (Exception e1) {Log.e("ScreenUtil", "get status bar height fail");e1.printStackTrace();}Log.i("status_height", "" + sbar);return sbar;}public static boolean isRunningForeground(Context context) {ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);return context.getPackageName().equals(am.getRunningTasks(1).get(0).topActivity.getPackageName());}}
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