Android Charset Convert toCharset(final String str, final String charset, int judgeCharsetLength)

Description

to Charset

License

Apache License

Declaration

public static String toCharset(final String str, final String charset,
            int judgeCharsetLength) 

Method Source Code

/*//from  www .j  a  v  a2s .  co m
 * Copyright (c) 2013. wyouflf (wyouflf@gmail.com)
 *
 * 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.
 */

import org.apache.http.protocol.HTTP;
import java.util.ArrayList;
import java.util.List;

public class Main{
    public static final String DEFAULT_ENCODING_CHARSET = HTTP.DEFAULT_CONTENT_CHARSET;
    public static final List<String> SUPPORT_CHARSET = new ArrayList<String>();
    public static String toCharset(final String str, final String charset,
            int judgeCharsetLength) {
        try {
            String oldCharset = getEncoding(str, judgeCharsetLength);
            return new String(str.getBytes(oldCharset), charset);
        } catch (Throwable ex) {
            LogUtils.w(ex);
            return str;
        }
    }
    public static String getEncoding(final String str,
            int judgeCharsetLength) {
        String encode = CharsetUtils.DEFAULT_ENCODING_CHARSET;
        for (String charset : SUPPORT_CHARSET) {
            if (isCharset(str, charset, judgeCharsetLength)) {
                encode = charset;
                break;
            }
        }
        return encode;
    }
    public static boolean isCharset(final String str, final String charset,
            int judgeCharsetLength) {
        try {
            String temp = str.length() > judgeCharsetLength ? str
                    .substring(0, judgeCharsetLength) : str;
            return temp.equals(new String(temp.getBytes(charset), charset));
        } catch (Throwable e) {
            return false;
        }
    }
}

Related

1. isCharset(final String str, final String charset, int judgeCharsetLength)
2. changeCharset(String str, String from, String to)