在我Activity的{{1}}内我尝试使用Android Application将text files从storage on device上传到服务器。
这些文件是在玩游戏时在之前的活动中生成的。
然而，当我尝试上传它们时，我从我的代码中收到以下异常消息：
PHP script然后显示应该上传的文件名的路径
我知道文件正在生成，因为我可以在设备存储上看到它们。我也知道上传到服务器的功能正常，因为我已经使用几天前创建的文件对其进行了测试。
基本上我想知道：
在下一个活动尝试上传之前，上一个活动中的文件"Source file not exist"是否已上传？即写入存储需要fully created吗？
延迟执行上传功能的线程会解决问题吗？
上传文件的活动:(注意：文件名作为附加活动传递给下一个活动）
how long修改
创建文件的上一个活动：
创建文件的方法（全部4个相同）：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mathsgameresults);
initialiseVars();
setAllTextViews();
messageText = (TextView)findViewById(R.id.mathsresultsservertext);
messageText.setText("Uploading file path :- '/storage/sdcard0/files/"+fileNameRaw
+"','/storage/sdcard0/ files/"+fileNameEEGPower+"','/storage/sdcard0/files/"+fileNameMeditation+"','/storage/sdcard0/files/"+fileNameAttention+"' ");
//url to php script on server
upLoadServerUri = " my url in here (not shown)";
//remove this if not wanted to show.
dialog = ProgressDialog.show(MathsGameResults.this, "", "Uploading files...", true);
//logic to upload files in new thread
new Thread(new Runnable() {
public void run() {
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("uploading started.....");
}
});
uploadFile(uploadFilePath + "" + fileNameRaw);
uploadFile(uploadFilePath + "" + fileNameEEGPower);
uploadFile(uploadFilePath + "" + fileNameMeditation);
uploadFile(uploadFilePath + "" + fileNameAttention);
}
}).start();
}
public int uploadFile(String sourceFileUri) {
final String fileName = sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
final File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile()) {
dialog.dismiss();
Log.e("uploadFile", "Source File not exist :"
+ sourceFileUri);
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Source File not exist :"
+ fileName);
}
});
return 0;
}
else
{
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
+ fileName + "\"" + 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);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
final String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
//server responsecode 200 means upload successful
if(serverResponseCode == 200){
runOnUiThread(new Runnable() {
public void run() {
String msg = serverResponseMessage + "File Upload Completed.\n\n "
+fileName;
messageText.setText(msg);
Boolean isDel = sourceFile.delete();
if(isDel)
{
Toast.makeText(MathsGameResults.this, "File Upload Complete. And Deleted.",
Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(MathsGameResults.this, "File Upload Complete. And NOT Deleted.",
Toast.LENGTH_SHORT).show();
}
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("MalformedURLException Exception : check script url.");
Toast.makeText(MathsGameResults.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
final String d = e.getMessage() + " " + e.getStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText(d + " Got Exception : see logcat ");
Toast.makeText(MathsGameResults.this, "Got Exception : see logcat ",
Toast.LENGTH_LONG).show();
}
});
Log.e("Upload file to server Exception", "Exception : "
+ e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
} // End else block
}
路径是保存文件并创建文件名：
/**
* Method used to save Raw data to a file on phone
*
* @param data
*/
public void writeToFileRawData(String data) {
// creating the file where the contents will be written to
File file = new File(dir, fileNameRaw + ".txt");
FileOutputStream os;
try {
boolean append = true;
os = new FileOutputStream(file, append);
String writeMe = data + "\n";
if (isHeaderDateRaw) {
os.write(headerDateRaw.getBytes());
isHeaderDateRaw = false;
}
if (isHeaderRawValues) {
os.write(headerRawValues.getBytes());
isHeaderRawValues = false;
}
os.write(writeMe.getBytes());
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
使用处理程序将数据保存到文件：
// code relating to saving to file
File sdCard = Environment.getExternalStorageDirectory();
dir = new File(sdCard.getAbsolutePath() + "/files/");
dir.mkdir();
//creating file name
fileNameRaw = "MathsGame-Raw-" + timestamp + android.os.Build.SERIAL;
通过意图将文件名传递给下一个活动：
case TGDevice.MSG_RAW_DATA:
headerRawValues = order("Seconds") + order("Value") + "\n";
Time time2= new Time();
time2.setToNow();
String seconds2 = time2.hour + ":" + (time2.minute < 10 ? "0"+time2.minute : time2.minute) + ":"
+ (time2.second < 10 ? "0"+time2.second : time2.second);
// creating the string to be written to file
String line2 = order(seconds2 + "") + order("" + msg.arg1)
+ "\n";
// write the string to file
writeToFileRawData(line2);
break;