工具类ToolsManager

import android.app.Activity;
import android.content.Context;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.ListView;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created by Tom on 2017/1/23.
 */

public class ToolsManager {

    private static final String EXTERNAL_STORAGE = "EXTERNAL_STORAGE";  // 外部存储路径
    private static final String SECONDARY_STORAGE = "SECONDARY_STORAGE"; // 内部存储路径

    /**
     * 　获取存储根目录路径
     * @return
     */
    public static String  getSdcardPath() {
        String m_output_path = System.getenv(EXTERNAL_STORAGE);
        if (m_output_path == null) {
            m_output_path = System.getenv(SECONDARY_STORAGE);
        }
        return m_output_path;
    }

    /**
     * 获取屏幕宽度
     *
     * @param context
     * @return
     */
    public static int getScreenWidth(Context context) {
        DisplayMetrics dm = new DisplayMetrics();
        ((Activity) context).getWindowManager().getDefaultDisplay()
                .getMetrics(dm);
        return dm.widthPixels;
    }

    /**
     * 获取屏幕高度
     *
     * @param context
     * @return
     */
    public static int getScreenHeight(Context context) {
        DisplayMetrics dm = new DisplayMetrics();
        ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(dm);
        return dm.heightPixels;
    }

    /**
     * 判断给定字符串是否空白串。 空白串是指由空格、制表符、回车符、换行符组成的字符串 若输入字符串为null或空字符串，返回true
     *
     * @param input
     * @return boolean
     */
    public static boolean isEmpty(String input) {
        return ((input == null || "".equals(input) || "null".equals(input) || " "
                .equals(input)) ? true : false);
    }

    /**
     * 判定邮箱格式
     *
     * @param strEmail
     * @return
     */
    public static boolean isEmail(String strEmail) {
        String strPattern = "^[a-zA-Z][\\w\\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w\\.-]*[a-zA-Z0-9]\\.[a-zA-Z][a-zA-Z\\.]*[a-zA-Z]$";
        Pattern p = Pattern.compile(strPattern);
        Matcher m = p.matcher(strEmail);
        return m.matches();
    }

    /**
     * 判断是否是手机号
     *
     * @param mobile
     * @return
     */
    public static boolean isMobile(String mobile) {
        String regex = "^((13[0-9])|(15[0-9])|(18[0-9]))\\d{8}$";
        Pattern p = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
        Matcher m = p.matcher(mobile);
        return m.matches();
    }

    /**
     * 判断是否是身份证号码
     *
     * @param strEmail
     * @return
     */
    public static boolean isIdentify(String strEmail) {
        String strPattern = "(\\d{14}[0-9a-zA-Z])|(\\d{17}[0-9a-zA-Z])";
        Pattern p = Pattern.compile(strPattern);
        Matcher m = p.matcher(strEmail);
        return m.matches();
    }

    /**
     * 判断是否为网络链接
     *
     * @param url
     * @return
     */
    public static boolean isWebLink(String url) {
        Pattern pattern = Pattern
                .compile("http://(([a-zA-z0-9]|-){1,}\\.){1,}[a-zA-z0-9]{1,}-*");
        Matcher matcher = pattern.matcher(url);
        if (!matcher.find()) {
            return false;
        } else {
            return true;
        }
    }

    public static void setListViewHeightBasedOnChildren(ListView listView) {
        // 获取ListView对应的Adapter
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null) {
            return;
        }

        int totalHeight = 0;
        for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
            // listAdapter.getCount()返回数据项的数目
            View listItem = listAdapter.getView(i, null, listView);
            // 计算子项View 的宽高
            listItem.measure(0, 0);
            // 统计所有子项的总高度
            totalHeight += listItem.getMeasuredHeight();
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        // listView.getDividerHeight()获取子项间分隔符占用的高度
        // params.height最后得到整个ListView完整显示需要的高度
        listView.setLayoutParams(params);
    }
}