我需要从我的 android 模拟器目录 ('data\data\org.mypackage\file.dat') 将文件上传到远程服务器，但是当我尝试访问该文件时，它会出现类似“错误：权限被拒绝”的错误，我将我的 sqlite 数据库存储在 'data\data\org.mypackage\databases\' 文件夹中，在应用程序启动期间，如果该文件夹中没有 sqlite db，我将它从我的资产文件夹复制到该目录并从那里访问它工作完美，但在上传任务的情况下，它要求许可为什么会发生这种情况？以下是我的 uploadFile 方法
private void uploadFile(){
HttpURLConnection conn = null;
DataOutputStream dos = null;
DataInputStream inStream = null;
String existingFileName="/data/data/org.mypackage/file.dat";
GeneralFunctions.comment(existingFileName);
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
String responseFromServer = "";
String urlString = "http://117.231.150.213:8080/upload.jsp";
try
{
//------------------ CLIENT REQUEST
FileInputStream fileInputStream = new FileInputStream(new File(existingFileName) );
// open a URL connection to the Servlet
URL url = new URL(urlString);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
// Allow Inputs
conn.setDoInput(true);
// Allow Outputs
conn.setDoOutput(true);
// Don't use a cached copy.
conn.setUseCaches(false);
// Use a post method.
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
dos = new DataOutputStream( conn.getOutputStream() );
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + existingFileName + "\"" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0)
{
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// close streams
GF.showToast("File is written");
fileInputStream.close();
dos.flush();
dos.close();
}
catch (Exception ex)
{
GeneralFunctions.exception("error: " + ex.getMessage());
}
//------------------ read the SERVER RESPONSE
try {
inStream = new DataInputStream ( conn.getInputStream() );
String str;
while (( str = inStream.readLine()) != null)
{
GeneralFunctions.comment("Server Response "+str);
}
inStream.close();
}
catch (Exception ioex){
GeneralFunctions.exception("error: " + ioex.getMessage());
}
}