/**
*
*/
package com.com.mr_wrong.Image.utils;
import android.content.Context;
import android.content.res.Resources;
import android.view.Display;
import android.view.WindowManager;
import java.lang.reflect.Field;
public class DensityUtils {
/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
/**
* 获取屏幕宽度
*
* @param context
* @return
*/
public static int getScreenWidth(Context context) {
Display display = ((WindowManager) context
.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
// Point p = new Point();
// display.getSize(p);//need api13
return display.getWidth();
}
public static int getScreenHeight(Context context) {
Display display = ((WindowManager) context
.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
// Point p = new Point();
// display.getSize(p);//need api13
int height = display.getHeight();
return height;
}
/**
* 获取状态栏高度
*
* @param context
* @return
*/
public static int getStatusBarHeight(Context context) {
Class<?> c = null;
Object obj = null;
Field field = null;
int x = 0, sbar = 38;//默认为38,貌似大部分是这样的
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) {
e1.printStackTrace();
}
return sbar;
}
public static int getNavigationBarHeight(Context context) {
Resources resources = context.getResources();
int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
if (resourceId > 0) {
return resources.getDimensionPixelSize(resourceId);
}
return 0;
}
/**
* 计算分享内容的字数,一个汉字=两个英文字母,一个中文标点=两个英文标点 注意:该函数的不适用于对单个字符进行计算,因为单个字符四舍五入后都是1
*
* @param c
* @return
*/
public static long calculateLength(CharSequence c) {
double len = 0;
for (int i = 0; i < c.length(); i++) {
int tmp = (int) c.charAt(i);
if (tmp > 0 && tmp < 127) {
len += 0.5;
} else {
len++;
}
}
return Math.round(len);
}
}