android 工具类2

package com.hz2hs.utils;

import java.io.File;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;

import com.hz2hs.constant.Constant;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.net.TrafficStats;
import android.os.Environment;
import android.os.StatFs;

public class Util {
	/**
	 * 
	 * getCurrentTime:获取系统当前时间
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-3 上午11:30:05
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getCurrentTime() {
		SimpleDateFormat sDateFormat = new SimpleDateFormat(
				"yyyy-MM-dd    hh:mm:ss");
		return sDateFormat.format(new java.util.Date());
	}

	/**
	 * 
	 * px2dip:px转dp
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-3 上午11:30:26
	 * @param @param context
	 * @param @param pxValue
	 * @param @return
	 * @return int
	 * @throws
	 */
	public static int px2dip(Context context, float pxValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (pxValue / scale + 0.5f);
	}

	/**
	 * 
	 * dip2px:dp转px
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-3 上午11:30:41
	 * @param @param context
	 * @param @param dpValue
	 * @param @return
	 * @return int
	 * @throws
	 */
	public static int dip2px(Context context, float dpValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (dpValue * scale + 0.5f);
	}

	/**
	 * 
	 * getChineseName:获得SharedPreferences中的chineseame
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-9 上午11:20:57
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getChineseName(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("chineseame", "");
	}

	/**
	 * 
	 * getUserId:获得SharedPreferences中的userId
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-9 上午11:21:30
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getUserId(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("userId", "");
	}

	/**
	 * 
	 * getSmId:获得SharedPreferences中的smId
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-9 上午11:21:44
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getSmId(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("smId", "");
	}

	/**
	 * 
	 * getPhoneNum:获得SharedPreferences中的PhoneNum
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-19 下午2:05:55
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getPhoneNum(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("account", "");
	}

	/**
	 * 
	 * getPassWord:获得SharedPreferences中的password
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-19 下午1:54:26
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getPassWord(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("password", "");
	}

	/**
	 * 
	 * getImei:获得SharedPreferences中的imei
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-19 下午2:07:05
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getImei(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("imei", "");
	}

	/**
	 * 
	 * getImsi:获得SharedPreferences中的imsi
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-19 下午2:07:54
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getImsi(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("imsi", "");
	}

	/**
	 * 
	 * getAgentId:获得SharedPreferences中的agentId
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-12 下午3:07:24
	 * @param @param context
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String getAgentId(Context context) {
		SharedPreferences userInfo = context.getSharedPreferences("user_info",
				0);
		return userInfo.getString("agentId", "");
	}

	/**
	 * 检查SD卡状态，如果sd卡不存在或者SD卡剩余空间不足禁止程序启动
	 * 
	 * @return
	 */
	public static boolean checkSDCardState() {
		String state = Environment.getExternalStorageState();
		File sd = Environment.getExternalStorageDirectory();
		StatFs stat = new StatFs(sd.getPath());
		double blockSize = stat.getBlockSize();
		double freeBlocks = stat.getAvailableBlocks();
		double countSize = blockSize * freeBlocks;
		long role = 1024 * 1024 * 10;
		if (state.equals(Environment.MEDIA_MOUNTED) && countSize > role) {
			return true;
		}
		return false;
	}

	/**
	 * 
	 * isConnectNet:是否连接到网络
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-2-17 下午3:45:47
	 * @param @param context
	 * @param @return
	 * @return Boolean
	 * @throws
	 */
	public static Boolean isConnectNet(Context context) {
		ConnectivityManager con = (ConnectivityManager) context
				.getSystemService(Activity.CONNECTIVITY_SERVICE);
		NetworkInfo n1 =con.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
		NetworkInfo n2 =con.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
		State wifi = null;
		State internet = null;
		if(n1 !=null){
			wifi = n1.getState();
		}
		if(n2 !=null){
			internet = n2.getState();
		}
		if(internet == State.CONNECTED || internet==State.CONNECTING){
			return true;
		}
		if(wifi == State.CONNECTED||wifi==State.CONNECTING){
			return true;
		}
	       else {
			return false;
		}
	}

	/**
	 * 
	 * getAppFlow:获取本程序流量统计
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-19 上午10:19:26
	 * @param @return
	 * @return long
	 * @throws
	 */
	public static String getAppFlow() {
		// 获取网络流量
		long recv = TrafficStats.getUidRxBytes(android.os.Process.myUid());
		long sent = TrafficStats.getUidTxBytes(android.os.Process.myUid());

		return sizeToSize(recv + sent + "");
	}

	/**
	 * 
	 * sizeToSize:字符串转化成文件大小格式
	 * 
	 * @author zuyp
	 * @version
	 * @since Ver 1.1
	 * @Date 2013 2013-4-19 下午1:19:45
	 * @param @param size
	 * @param @return
	 * @return String
	 * @throws
	 */
	public static String sizeToSize(String size) {

		double i = Double.parseDouble(size);
		if (i >= 1024 * 1024 && i < 1024 * 1024 * 1024) {
			i /= 1024 * 1024;
			DecimalFormat df = new DecimalFormat("#.##");
			return (df.format(i) + "MB");
		} else if (i >= 1024 * 1024 * 1024) {
			i /= 1024 * 1024 * 1024;
			DecimalFormat df = new DecimalFormat("#.##");
			return (df.format(i) + "GB");
		} else if (i > 0 && i <= 1024) {
			i /= 1024;
			DecimalFormat df = new DecimalFormat("#.##");
			return (df.format(i) + " B");
		} else if (i >= 1024 && i < 1024 * 1024) {
			i /= 1024 * 1024;
			DecimalFormat df = new DecimalFormat("#.##");
			return (df.format(i) + "KB");
		} else {
			return null;
		}
	}

	private static final double EARTH_RADIUS = 6378137;

	private static double rad(double d) {
		return d * Math.PI / 180.0;
	}

	/**
	 * 
	 * GetDistance:根据两点间经纬度坐标（double值），计算两点间距离，单位为米
	 * @author   zuyp
	 * @version  
	 * @since    Ver 1.1
	 * @Date	 2013	2013-5-14		上午11:40:31
	 * @param  @param lng1
	 * @param  @param lat1
	 * @param  @param lng2
	 * @param  @param lat2
	 * @param  @return  
	 * @return double  
	 * @throws
	 */
	public static double GetDistance(double lng1, double lat1, double lng2,
			double lat2) {
		double radLat1 = rad(lat1);
		double radLat2 = rad(lat2);
		double a = radLat1 - radLat2;
		double b = rad(lng1) - rad(lng2);
		double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)
				+ Math.cos(radLat1) * Math.cos(radLat2)
				* Math.pow(Math.sin(b / 2), 2)));
		s = s * EARTH_RADIUS;
		s = Math.round(s * 10000) / 10000;
		return s;
	}



}