hex dump byte array - Android File Input Output

Android examples for File Input Output:Byte Array

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Description

hex dump byte array

Demo Code

/*/*from w w w  . j a  v  a2  s . c om*/
 * Copyright 2014-2015 Marvin Wi?feld
 *
 * 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 android.util.Log;
import java.lang.reflect.Method;

public class Main{
    private static final long HEXDUMP_BYTES_PER_LINE = 16;
    public static String hexdump(byte[] bytes, long start) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0 - (int) (start % HEXDUMP_BYTES_PER_LINE); i < bytes.length; i++) {
            long num = Math.abs((start + i) % HEXDUMP_BYTES_PER_LINE);
            if (num == 0 && sb.length() > 0)
                sb.append('\n');
            if (num == 0)
                sb.append(addrHex(start + i)).append(": ");
            if (num == 8)
                sb.append(" ");
            if (i >= 0)
                sb.append(DebugHelper.byteHex(bytes[i])).append(" ");
            else
                sb.append("   ");
        }
        return sb.toString().trim();
    }
    public static String addrHex(long i) {
        if (Native.is64Bit()) {
            return longHex(i);
        } else {
            return intHex((int) i);
        }
    }
    public static String byteHex(byte b) {
        return String.format("%02X", b);
    }
    public static String longHex(long i) {
        return String.format("0x%016X", i);
    }
    public static String intHex(int i) {
        return String.format("0x%08X", i);
    }
}

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