我创建了一个应用程序，它应该一个接一个地上传特定目录中的所有文件。该代码仅上传目录中的最后一个文件，而不是所有文件。
Activity 类:
public class UploadAudioDemo extends Activity {
private static final int SELECT_AUDIO = 2;
String selectedPath = "";
ArrayList<String> selectedPathList = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload_audio_demo);
openGalleryAudio();
}
public void openGalleryAudio(){
String name = null;
File sdCardRoot = Environment.getExternalStorageDirectory();
File yourDir = new File(sdCardRoot, "/My_records");
for (File f : yourDir.listFiles())
{
if (f.isFile())
name = f.getName();
selectedPath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/My_records/"+name;
// Do your stuff
Log.d("selectedPath", selectedPath);
selectedPathList.add(selectedPath);
}
new Thread(new Runnable()
{
public void run()
{
runOnUiThread(new Runnable()
{
public void run()
{
}
});
Iterator<String> it = selectedPathList.iterator();
while (it.hasNext())
{
doFileUpload(it.next()+"");
}
}
}).start();
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
private void doFileUpload(String myFileUrl)
{
HttpURLConnection conn = null;
DataOutputStream dos = null;
DataInputStream inStream = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
String responseFromServer = "";
String urlString = "http://bumba27.byethost16.com/Tracker/Services/recordedAudio/file_upload_new.php?mb_code='mb_code1'";
try
{
//------------------ CLIENT REQUEST
FileInputStream fileInputStream = new FileInputStream(new File(myFileUrl) );
// 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=\"" + selectedPath + "\"" + 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
Log.e("Debug","File is written");
fileInputStream.close();
dos.flush();
dos.close();
}
catch (MalformedURLException ex)
{
Log.e("Debug", "error: " + ex.getMessage(), ex);
}
catch (IOException ioe)
{
Log.e("Debug", "error: " + ioe.getMessage(), ioe);
}
//------------------ read the SERVER RESPONSE
try {
inStream = new DataInputStream ( conn.getInputStream() );
String str;
while (( str = inStream.readLine()) != null)
{
Log.e("Debug","Server Response "+str);
}
inStream.close();
}
catch (IOException ioex){
Log.e("Debug", "error: " + ioex.getMessage(), ioex);
}
}
}
logcat 报告:
/storage/sdcard0/My_records/10_12_2013_13_00_12.amr
/storage/sdcard0/My_records/10_12_2013_13_01_27.amr
File is written
Server Response The file is: 10_12_2013_13_01_27.amr and mb_code is: 'mb_code1'
File is written
Server Response The file is: 10_12_2013_13_01_27.amr and mb_code is: 'mb_code1'
从 logcat 输出我们可以了解到，在迭代数组时，我们获取了两个文件链接，但在上传时只上传了最后一个文件。
我错过了什么？如何纠正？
最佳答案
我认为问题在于您对所有上传使用相同的后台线程。
也就是说，它开始上传文件 1..n-1，但不断被上传下一个 n+1 文件的新需求打断。最后一个文件上传没有中断，因此成功。
我建议查看 IntentServices:http://mobile.tutsplus.com/tutorials/android/android-fundamentals-intentservice-basics/
有了用于上传文件的 IntentService，您可以直接在 UI 线程中对文件进行简单循环。
for (filesYouWantToUpload) {
Intent i = new Intent(context, UploadIntentService.class);
i.putStringExtra(file);
startService(i);
}
编辑:
无法测试代码，但它应该看起来像这样。
FileUploader IntentService:
public class FileUploader extends IntentService {
private static final String TAG = FileUploader.class.getName();
public FileUploader() {
super("FileUploader");
}
@Override
protected void onHandleIntent(Intent intent) {
String selectedPath = intent.getStringExtra("selectedPath");
String myFileUrl = intent.getStringExtra("myFileUrl");
doFileUpload(selectedPath, myFileUrl);
}
private void doFileUpload(String selectedPath, String myFileUrl)
{
HttpURLConnection conn = null;
DataOutputStream dos = null;
DataInputStream inStream = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
String responseFromServer = "";
String urlString = "http://bumba27.byethost16.com/Tracker/Services/recordedAudio/file_upload_new.php?mb_code='mb_code1'";
try
{
//------------------ CLIENT REQUEST
FileInputStream fileInputStream = new FileInputStream(new File(myFileUrl) );
// 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=\"" + selectedPath + "\"" + 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
Log.e("Debug","File is written");
fileInputStream.close();
dos.flush();
dos.close();
}
catch (MalformedURLException ex)
{
Log.e("Debug", "error: " + ex.getMessage(), ex);
}
catch (IOException ioe)
{
Log.e("Debug", "error: " + ioe.getMessage(), ioe);
}
//------------------ read the SERVER RESPONSE
try {
inStream = new DataInputStream ( conn.getInputStream() );
String str;
while (( str = inStream.readLine()) != null)
{
Log.e("Debug","Server Response "+str);
}
inStream.close();
}
catch (IOException ioex){
Log.e("Debug", "error: " + ioex.getMessage(), ioex);
}
}
}
记得更新你的 list :
<service android:name="yourpackage.FileUploader " />
最后 openGalleryAudio() 会是这样的:
public void openGalleryAudio(){
String name = null;
File sdCardRoot = Environment.getExternalStorageDirectory();
File yourDir = new File(sdCardRoot, "/My_records");
for (File f : yourDir.listFiles())
{
if (f.isFile())
name = f.getName();
selectedPath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/My_records/"+name;
// Do your stuff
Log.d("selectedPath", selectedPath);
selectedPathList.add(selectedPath);
}
Iterator<String> it = selectedPathList.iterator();
while (it.hasNext())
{
Intent i = new Intent(this, FileUploader.class)
i.putExtra("selectedPath", selectedPath);
i.putExtra("myFileUrl", it.next()+"");
startService(i);
}
}
关于java - 多文件上传只上传最后一个文件而不上传其余文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20518260/