com.hadoopz.MyDroidLib.util.JStringKit Maven / Gradle / Ivy

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/*
 * Copyright 2017 jw362j.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hadoopz.MyDroidLib.util;

/**
 *
 * @author jw362j
 */
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.graphics.Paint;
import android.text.TextUtils;
import android.widget.TextView;

 
public class JStringKit {
 
    public static final String EMPTY = "";

     
    public static final int INDEX_NOT_FOUND = -1;

    
    public static String firstCharToLowerCase(String str) {
        Character firstChar = str.charAt(0);
        String tail = str.substring(1);
        str = Character.toLowerCase(firstChar) + tail;
        return str;
    }

    
    public static String firstCharToUpperCase(String str) {
        Character firstChar = str.charAt(0);
        String tail = str.substring(1);
        str = Character.toUpperCase(firstChar) + tail;
        return str;
    }

     
    public static boolean isBlank(String str) {
        return str == null || "".equals(str.trim());
    }

     
    public static boolean notBlank(String str) {
        return str != null && !"".equals(str.trim());
    }

    public static boolean notBlank(String... strings) {
        if (strings == null) {
            return false;
        }
        for (String str : strings) {
            if (str == null || "".equals(str.trim())) {
                return false;
            }
        }
        return true;
    }

    public static boolean notNull(Object... paras) {
        if (paras == null) {
            return false;
        }
        for (Object obj : paras) {
            if (obj == null) {
                return false;
            }
        }
        return true;
    }

    
    public static boolean isEmpty(CharSequence cs) {
        return cs == null || cs.length() == 0;
    }

    
    public static boolean isNotEmpty(CharSequence cs) {
        return !isEmpty(cs);
    }

    
    public static boolean isBlank(CharSequence cs) {
        int strLen;
        if (cs == null || (strLen = cs.length()) == 0 || cs.equals("null")) {
            return true;
        }
        for (int i = 0; i < strLen; i++) {
            if (Character.isWhitespace(cs.charAt(i)) == false) {
                return false;
            }
        }
        return true;
    }
 
    public static boolean isNotBlank(CharSequence cs) {
        return !isBlank(cs);
    }

     
    public static String trim(String str) {
        return str == null ? null : str.trim();
    }

     
    public static String trimToNull(String str) {
        String ts = trim(str);
        return isEmpty(ts) ? null : ts;
    }

     
    public static String trimToEmpty(String str) {
        return str == null ? EMPTY : str.trim();
    }

     
    public static boolean equals(CharSequence cs1, CharSequence cs2) {
        return cs1 == null ? cs2 == null : cs1.equals(cs2);
    }

    
    public static boolean isNumber(String str) {
        Pattern pattern = Pattern.compile("[0-9]*");
        Matcher match = pattern.matcher(str);
        if (match.matches() == false) {
            return false;
        } else {
            return true;
        }
    }

    
    public static String hidePhoneNum(String phoneNum) {
        return phoneNum.substring(0, 3) + "****" + phoneNum.substring(7, phoneNum.length());
    }

    
    public static String getUUID() {
        UUID uuid = UUID.randomUUID();

        return uuid.toString();
    }

    public static float getContentWidth(String content, TextView tView) {
        if (null == tView && TextUtils.isEmpty(content)) {
            return 0f;
        }
        return getContentWidthWithSize(content, tView.getTextSize()) * tView.getTextScaleX();
    }

    private static float getContentWidthWithSize(String content, float textSize) {
        float width = 0f;

        Paint tPaint = new Paint();
        tPaint.setTextSize(textSize);
        width = tPaint.measureText(content);

        return width;
    }
}