/**
 * 得到Assets里面相应的文件流
 *
 * @param fileName
 * @return
 */
private InputStream getAssetsStream(String fileName) {
 InputStream is = null;
 try {
  is = getAssets().open(fileName);
  //is.close();
 } catch (IOException e) {
  e.printStackTrace();
 }
 return is;
}

/**
 * 读取raw文件夹下面的文件
 * @return
 */
public InputStream getFromRaw() {
 InputStream ins = null;
 try {
  ins = getResources().openRawResource(R.raw.area);
 } catch (Exception e) {
  e.printStackTrace();
 }
 return ins;
}

/**
 * InputStream 转String
 * @param inputStream
 * @return
 */
private String InputStreamToString(InputStream inputStream) {
 String result = null;
 try {
  int length = inputStream.available();
  byte [] buffer = new byte[length];
  inputStream.read(buffer);
  result = EncodingUtils.getString(buffer, "UTF-8");
 } catch (Exception e) {
  e.printStackTrace();
 }
 return result;
}