我是 Android 编程的初学者，我正在尝试将图像上传到服务器。我在stackoverflow上找到了一些代码，我调整了它，它仍然不起作用。
问题是我的图片仍然无法上传。
编辑我解决了问题，我对服务器上的文件夹没有权限。现在我有一个新问题。进度条不起作用。它一直说 0 % 已传输
有人在我的代码中看到错误吗？
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
public class PreviewActivity extends Activity {
/** The captured image file. Get it's path from the starting intent */
private File mImage;
public static final String EXTRA_IMAGE_PATH = "extraImagePath"
/** Log tag */
private static final String TAG = "DFH";
/** Progress dialog id */
private static final int UPLOAD_PROGRESS_DIALOG = 0;
private static final int UPLOAD_ERROR_DIALOG = 1;
private static final int UPLOAD_SUCCESS_DIALOG = 2;
/** Handler to confirm button */
private Button mConfirm;
/** Handler to cancel button */
private Button mCancel;
/** Uploading progress dialog */
private ProgressDialog mDialog;
/**
* Called when the activity is created
*
* We load the captured image, and register button callbacks
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.preview);
setResult(RESULT_CANCELED);
// Import image
Bundle extras = getIntent().getExtras();
String imagePath = extras.getString(FotoActivity.EXTRA_IMAGE_PATH);
Log.d("DFHprev", imagePath);
mImage = new File(imagePath);
if (mImage.exists()) {
setResult(RESULT_OK);
loadImage(mImage);
}
registerButtonCallbacks();
}
@Override
protected void onPause() {
super.onPause();
}
/**
* Register callbacks for ui buttons
*/
protected void registerButtonCallbacks() {
// Cancel button callback
mCancel = (Button) findViewById(R.id.preview_send_cancel);
mCancel.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
PreviewActivity.this.finish();
}
});
// Confirm button callback
mConfirm = (Button) findViewById(R.id.preview_send_confirm);
mConfirm.setEnabled(true);
mConfirm.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new UploadImageTask().execute(mImage);
}
});
}
/**
* Initialize the dialogs
*/
@Override
protected Dialog onCreateDialog(int id) {
switch(id) {
case UPLOAD_PROGRESS_DIALOG:
mDialog = new ProgressDialog(this);
mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mDialog.setCancelable(false);
mDialog.setTitle(getString(R.string.progress_dialog_title_connecting));
return mDialog;
case UPLOAD_ERROR_DIALOG:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(R.string.upload_error_title)
.setIcon(android.R.drawable.ic_dialog_alert)
.setMessage(R.string.upload_error_message)
.setCancelable(false)
.setPositiveButton(getString(R.string.retry), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
PreviewActivity.this.finish();
}
});
return builder.create();
case UPLOAD_SUCCESS_DIALOG:
AlertDialog.Builder success = new AlertDialog.Builder(this);
success.setTitle(R.string.upload_success_title)
.setIcon(android.R.drawable.ic_dialog_info)
.setMessage(R.string.upload_success_message)
.setCancelable(false)
.setPositiveButton(getString(R.string.success), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
PreviewActivity.this.finish();
}
});
return success.create();
default:
return null;
}
}
/**
* Prepare the progress dialog
*/
@Override
protected void onPrepareDialog(int id, Dialog dialog) {
switch(id) {
case UPLOAD_PROGRESS_DIALOG:
mDialog.setProgress(0);
mDialog.setTitle(getString(R.string.progress_dialog_title_connecting));
}
}
/**
* Load the image file into the imageView
*
* @param image
*/
protected void loadImage(File image) {
Bitmap bm = BitmapFactory.decodeFile(image.getPath());
ImageView view = (ImageView) findViewById(R.id.preview_image);
view.setImageBitmap(bm);
}
/**
* Asynchronous task to upload file to server
*/
class UploadImageTask extends AsyncTask<File, Integer, Boolean> {
/** Upload file to this url */
private static final String UPLOAD_URL = "http://www.xxxx.x/xxxx/fotos";
/** Send the file with this form name */
private static final String FIELD_FILE = "file";
/**
* Prepare activity before upload
*/
@Override
protected void onPreExecute() {
super.onPreExecute();
setProgressBarIndeterminateVisibility(true);
mConfirm.setEnabled(false);
mCancel.setEnabled(false);
showDialog(UPLOAD_PROGRESS_DIALOG);
}
/**
* Clean app state after upload is completed
*/
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
setProgressBarIndeterminateVisibility(false);
mConfirm.setEnabled(true);
mDialog.dismiss();
if (result) {
showDialog(UPLOAD_SUCCESS_DIALOG);
} else {
showDialog(UPLOAD_ERROR_DIALOG);
}
}
@Override
protected Boolean doInBackground(File... image) {
return doFileUpload(image[0], "UPLOAD_URL");
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
if (values[0] == 0) {
mDialog.setTitle(getString(R.string.progress_dialog_title_uploading));
}
mDialog.setProgress(values[0]);
}
private boolean doFileUpload(File file, String uploadUrl) {
HttpURLConnection connection = null;
DataOutputStream outputStream = null;
DataInputStream inputStream = null;
String pathToOurFile = file.getPath();
String urlServer = "http://www.xxxx.x/xxxx/upload.php";
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
// log pathtoourfile
Log.d("DFHinUpl", pathToOurFile);
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
int sentBytes = 0;
long fileSize = file.length();
// log filesize
String files= String.valueOf(fileSize);
String buffers= String.valueOf(maxBufferSize);
Log.d("fotosize",files);
Log.d("buffers",buffers);
try
{
FileInputStream fileInputStream = new FileInputStream(new File(pathToOurFile) );
URL url = new URL(urlServer);
connection = (HttpURLConnection) url.openConnection();
// Allow Inputs & Outputs
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
// Enable POST method
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
outputStream = new DataOutputStream( connection.getOutputStream() );
outputStream.writeBytes(twoHyphens + boundary + lineEnd);
outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + pathToOurFile +"\"" + lineEnd);
outputStream.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// Read file
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0)
{
outputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
sentBytes += bufferSize;
publishProgress((int)(sentBytes * 100 / fileSize));
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
outputStream.writeBytes(lineEnd);
outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
int serverResponseCode = connection.getResponseCode();
String serverResponseMessage = connection.getResponseMessage();
fileInputStream.close();
outputStream.flush();
outputStream.close();
try {
int responseCode = connection.getResponseCode();
return responseCode == 200;
} catch (IOException ioex) {
Log.e("DFHUPLOAD", "Upload file failed: " + ioex.getMessage(), ioex);
return false;
} catch (Exception e) {
Log.e("DFHUPLOAD", "Upload file failed: " + e.getMessage(), e);
return false;
}
}
catch (Exception ex)
{
String msg= ex.getMessage();
Log.d("DFHUPLOAD", msg);
}
return true;
}
}
}
处理此上传的 PHP 代码如下：
<?php
$date=getdate();
$urldate=$date['year'].$date['month'].$date['month'].$date['hours'].$date['minutes'].$date[ 'seconds'];
$target_path = "./";
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']) . $urldate;
if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['uploadedfile']['name']).
" has been uploaded";
} else{
echo "There was an error uploading the file, please try again!";
}
?>
如果有人可以帮助我，我将不胜感激。