将InputStream（输入流）转成String 的方法

public static String readInputStream(FileInputStream inStream) {
try {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length = -1;
while ((length = inStream.read(buffer)) != -1) {
outStream.write(buffer, 0, length);
}
outStream.close();
inStream.close();
return outStream.toString();
} catch (IOException e) {
Log.i("FileTest", e.getMessage());
}
return null;
}