trim File name - Android java.io

Android examples for java.io:File Name

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  3. java.io
  4. File Name

Description

trim File name

Demo Code

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Objects;
import java.util.regex.Pattern;
import java.util.zip.CRC32;
import java.util.zip.CheckedInputStream;

public class Main{

    @VisibleForTesting//from   ww  w  . j a  v a 2  s . co  m
    public static String trimFilename(String str, int maxBytes) {
        final StringBuilder res = new StringBuilder(str);
        trimFilename(res, maxBytes);
        return res.toString();
    }
    private static void trimFilename(StringBuilder res, int maxBytes) {
        byte[] raw = res.toString().getBytes(StandardCharsets.UTF_8);
        if (raw.length > maxBytes) {
            maxBytes -= 3;
            while (raw.length > maxBytes) {
                res.deleteCharAt(res.length() / 2);
                raw = res.toString().getBytes(StandardCharsets.UTF_8);
            }
            res.insert(res.length() / 2, "...");
        }
    }

}

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