android中byte[] short[] int[] long[]數組數據轉換

import java.nio.ByteOrder;

public class BytesTransUtils {

	 private String TAG = "BytesTransUtils";
	 private static BytesTransUtils instance = null;
	
	 private BytesTransUtils() {
	  // Log.i(TAG, "instance BytesTransUtils");
	 }
	
	 public static BytesTransUtils getInstance() {
		  if (instance == null) {
			  instance = new BytesTransUtils();
		  }
		  
		  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;
	 }
	
	 /*----------------------------------------------------------*/
	 /* 對轉換進行一個簡單的封裝 */
	 /*----------------------------------------------------------*/
	 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;
	 }

}