android byte[] 和short[]的转换

好久没有写博客了这是一个不好的习惯；要坚持写作的好习惯；

参考了：http://www.cnblogs.com/pegasus923/archive/2010/10/08/1845866.html的部分代码，并在其基础上做了一些修改；

1，工具代码

public class BytesTransUtil {

	private String TAG = "BytesTransUtil";
	private static BytesTransUtil instance = null;

	private BytesTransUtil() {
		// Log.i(TAG, "instance BytesTransUtil");
	}

	public static BytesTransUtil getInstance() {
		if (instance == null) {
			instance = new BytesTransUtil();
		}
		return instance;
	}

	public boolean testCPU() {
		if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {
			// System.out.println("is big ending");
			return true;
		} else {
			// System.out.println("is little ending");
			return false;
		}
	}

	public byte[] getBytes(short s, boolean bBigEnding) {
		byte[] buf = new byte[2];
		if (bBigEnding)
			for (int i = buf.length - 1; i >= 0; i--) {
				buf[i] = (byte) (s & 0x00ff);
				s >>= 8;
			}
		else
			for (int i = 0; i < buf.length; i++) {
				buf[i] = (byte) (s & 0x00ff);
				s >>= 8;
			}
		return buf;
	}

	public byte[] getBytes(int s, boolean bBigEnding) {
		byte[] buf = new byte[4];
		if (bBigEnding) {
			for (int i = buf.length - 1; i >= 0; i--) {
				buf[i] = (byte) (s & 0x000000ff);
				s >>= 8;
			}
		} else {
			System.out.println("1");
			for (int i = 0; i < buf.length; i++) {
				buf[i] = (byte) (s & 0x000000ff);
				s >>= 8;
			}
		}
		return buf;
	}

	public byte[] getBytes(long s, boolean bBigEnding) {
		byte[] buf = new byte[8];
		if (bBigEnding)
			for (int i = buf.length - 1; i >= 0; i--) {
				buf[i] = (byte) (s & 0x00000000000000ff);
				s >>= 8;
			}
		else
			for (int i = 0; i < buf.length; i++) {
				buf[i] = (byte) (s & 0x00000000000000ff);
				s >>= 8;
			}
		return buf;
	}

	public short getShort(byte[] buf, boolean bBigEnding) {
		if (buf == null) {
			throw new IllegalArgumentException("byte array is null!");
		}
		if (buf.length > 2) {
			throw new IllegalArgumentException("byte array size > 2 !");
		}
		short r = 0;
		if (bBigEnding) {
			for (int i = 0; i < buf.length; i++) {
				r <<= 8;
				r |= (buf[i] & 0x00ff);
			}
		} else {
			for (int i = buf.length - 1; i >= 0; i--) {
				r <<= 8;
				r |= (buf[i] & 0x00ff);
			}
		}

		return r;
	}

	public int getInt(byte[] buf, boolean bBigEnding) {
		if (buf == null) {
			throw new IllegalArgumentException("byte array is null!");
		}
		if (buf.length > 4) {
			throw new IllegalArgumentException("byte array size > 4 !");
		}
		int r = 0;
		if (bBigEnding) {
			for (int i = 0; i < buf.length; i++) {
				r <<= 8;
				r |= (buf[i] & 0x000000ff);
			}
		} else {
			for (int i = buf.length - 1; i >= 0; i--) {
				r <<= 8;
				r |= (buf[i] & 0x000000ff);
			}
		}
		return r;
	}

	public long getLong(byte[] buf, boolean bBigEnding) {
		if (buf == null) {
			throw new IllegalArgumentException("byte array is null!");
		}
		if (buf.length > 8) {
			throw new IllegalArgumentException("byte array size > 8 !");
		}
		long r = 0;
		if (bBigEnding) {
			for (int i = 0; i < buf.length; i++) {
				r <<= 8;
				r |= (buf[i] & 0x00000000000000ff);
			}
		} else {
			for (int i = buf.length - 1; i >= 0; i--) {
				r <<= 8;
				r |= (buf[i] & 0x00000000000000ff);
			}
		}
		return r;
	}

	/*----------------------------------------------------------*/
	/* 对转换进行一个简单的封装 */
	/*----------------------------------------------------------*/
	public byte[] getBytes(int i) {
		return getBytes(i, this.testCPU());
	}

	public byte[] getBytes(short s) {
		return getBytes(s, this.testCPU());
	}

	public byte[] getBytes(long l) {
		return getBytes(l, this.testCPU());
	}

	public int getInt(byte[] buf) {
		return getInt(buf, this.testCPU());
	}

	public short getShort(byte[] buf) {
		return getShort(buf, this.testCPU());
	}

	public long getLong(byte[] buf) {
		return getLong(buf, this.testCPU());
	}

	/****************************************/
	public short[] Bytes2Shorts(byte[] buf) {
		byte bLength = 2;
		short[] s = new short[buf.length / bLength];
		for (int iLoop = 0; iLoop < s.length; iLoop++) {
			byte[] temp = new byte[bLength];
			for (int jLoop = 0; jLoop < bLength; jLoop++) {
				temp[jLoop] = buf[iLoop * bLength + jLoop];
			}
			s[iLoop] = getShort(temp);
		}
		return s;
	}

	public byte[] Shorts2Bytes(short[] s) {
		byte bLength = 2;
		byte[] buf = new byte[s.length * bLength];
		for (int iLoop = 0; iLoop < s.length; iLoop++) {
			byte[] temp = getBytes(s[iLoop]);
			for (int jLoop = 0; jLoop < bLength; jLoop++) {
				buf[iLoop * bLength + jLoop] = temp[jLoop];
			}
		}
		return buf;
	}

	/****************************************/
	public int[] Bytes2Ints(byte[] buf) {
		byte bLength = 4;
		int[] s = new int[buf.length / bLength];
		for (int iLoop = 0; iLoop < s.length; iLoop++) {
			byte[] temp = new byte[bLength];
			for (int jLoop = 0; jLoop < bLength; jLoop++) {
				temp[jLoop] = buf[iLoop * bLength + jLoop];
			}
			s[iLoop] = getInt(temp);
			System.out.println("2out->"+s[iLoop]);
		}
		return s;
	}

	public byte[] Ints2Bytes(int[] s) {
		byte bLength = 4;
		byte[] buf = new byte[s.length * bLength];
		for (int iLoop = 0; iLoop < s.length; iLoop++) {
			byte[] temp = getBytes(s[iLoop]);
			System.out.println("1out->"+s[iLoop]);
			for (int jLoop = 0; jLoop < bLength; jLoop++) {
				buf[iLoop * bLength + jLoop] = temp[jLoop];
			}
		}
		return buf;
	}

	/****************************************/
	public long[] Bytes2Longs(byte[] buf) {
		byte bLength = 8;
		long[] s = new long[buf.length / bLength];
		for (int iLoop = 0; iLoop < s.length; iLoop++) {
			byte[] temp = new byte[bLength];
			for (int jLoop = 0; jLoop < bLength; jLoop++) {
				temp[jLoop] = buf[iLoop * bLength + jLoop];
			}
			s[iLoop] = getLong(temp);
		}
		return s;
	}

	public byte[] Longs2Bytes(long[] s) {
		byte bLength = 8;
		byte[] buf = new byte[s.length * bLength];
		for (int iLoop = 0; iLoop < s.length; iLoop++) {
			byte[] temp = getBytes(s[iLoop]);
			for (int jLoop = 0; jLoop < bLength; jLoop++) {
				buf[iLoop * bLength + jLoop] = temp[jLoop];
			}
		}
		return buf;
	}

}

2，测试代码

public class main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//简单测试了short[] 转byte[],其他类似；
		BytesTransUtil bytesTransUtil = BytesTransUtil.getInstance();
		int[] sTest = { 12345678, 87654321 };
		byte[] byteShort = bytesTransUtil.Ints2Bytes(sTest);
		int[] sTemp = bytesTransUtil.Bytes2Ints(byteShort);
		System.out.println("short[0] = " + sTemp[0] + "   short[1] = " + sTemp[1]);
		
	}
}