Android将InputStream转换为String和byte[]

为什要将InputStream转换为String？因为要实现加密功能，加密函数的输入都是String。
public static String inputStream2String (InputStream in) throws IOException {

StringBuffer out = new StringBuffer();
byte[] b = new byte[4096];
int n;
while ((n = in.read(b))!= -1){
out.append(new String(b,0,n));
}
Log.i("String的长度",new Integer(out.length()).toString());
return out.toString();
} 通过各种getInputStream，就可以将HttpUrlconnection、输入文本流等等转换为String，当然还可以转化为byte[]
public static byte[] InputStreamToByte(InputStream is) throws IOException {
ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
int ch;
while ((ch = is.read()) != -1) {
bytestream.write(ch);
}
byte imgdata[] = bytestream.toByteArray();
bytestream.close();
return imgdata;
}