在我的 Android 应用程序中，我尝试通过搜索手机存储来附加文件，然后尝试将其上传到服务器。我能够搜索文件并附加它们，在将其上传到服务器时我收到文件未找到异常。
请帮助我解决这个问题，请让我知道我错过了什么。如果有更好的方法请告诉我。
FileUtils.java：
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import java.net.URISyntaxException;
/**
* Created by iFocus on 6/16/2015.
*/
public class FileUtils {
public static String getPath(Context context, Uri uri) throws URISyntaxException {
if ("content".equalsIgnoreCase(uri.getScheme())) {
String[] projection = { "_data" };
Cursor cursor = null;
try {
cursor = context.getContentResolver().query(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow("_data");
if (cursor.moveToFirst()) {
return cursor.getString(column_index);
}
} catch (Exception e) {
// Eat it
}
}
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
}
搜索、附加和上传到服务器方法：
private void showFileChooser() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");
intent.addCategory(Intent.CATEGORY_OPENABLE);
try {
startActivityForResult(
Intent.createChooser(intent, "Select a File to Upload"),
FILE_SELECT_CODE);
Toast.makeText(getActivity(), "Please install a File Manager.",
Toast.LENGTH_SHORT).show();
} catch (android.content.ActivityNotFoundException ex) {
// Potentially direct the user to the Market with a Dialog
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case FILE_SELECT_CODE:
if (resultCode == RESULT_OK) {
// Get the Uri of the selected file
Uri uri = data.getData();
Log.d("iFocus", "The value of data is " + data);
Log.d("TAG", "File Uri: " + uri.toString());
fileName = uri.toString();
selectedFileName.setText(uri.toString());
// Get the path
String path = null;
try {
path = FileUtils.getPath(getActivity(), uri);
} catch (URISyntaxException e) {
e.printStackTrace();
}
Log.d("TAG", "File Path: " + path);
// Get the file instance
// File file = new File(path);
// Initiate the upload
}
break;
}
super.onActivityResult(requestCode, resultCode, data);
}
private void doFileUpload() {
HttpURLConnection conn = null;
DataOutputStream dos = null;
InputStreamReader inStream = null;
String existingFileName = fileName;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
String responseFromServer = "";
String urlString = "http://192.168.1.21/uploadToServer.php";
try {
//------------------ CLIENT REQUEST
FileInputStream fileInputStream = new FileInputStream(new File(fileName));
// 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
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
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuilder sb = new StringBuilder();
String line = null;
// Read Server Response
while ((line = reader.readLine()) != null) {
// Append server response in string
sb.append(line);
}
String str ;
str = sb.toString();
Log.d("iFocus", "The value of str is " +str);
inStream.close();
} catch (IOException ioex) {
Log.e("Debug", "error: " + ioex.getMessage(), ioex);
}
}
我的 Adb Logcat 跟踪：
06-17 10:43:21.484 16788-16788/com.blo.ifo.ifocusblogs E/Debug﹕ error: content:/com.android.providers.downloads.documents/document/1541: open failed: ENOENT (No such file or directory)
java.io.FileNotFoundException: content:/com.android.providers.downloads.documents/document/1541: open failed: ENOENT (No such file or directory)
at libcore.io.IoBridge.open(IoBridge.java:456)
at java.io.FileInputStream.<init>(FileInputStream.java:76)
at com.blo.ifo.ifocusblogs.InsertAndroidPost.doFileUpload(InsertAndroidPost.java:267)
at com.blo.ifo.ifocusblogs.InsertAndroidPost.access$400(InsertAndroidPost.java:50)
at com.blo.ifo.ifocusblogs.InsertAndroidPost$InsertServerAndroidAdminPost.onPostExecute(InsertAndroidPost.java:539)
at com.blo.ifo.ifocusblogs.InsertAndroidPost$InsertServerAndroidAdminPost.onPostExecute(InsertAndroidPost.java:445)
at android.os.AsyncTask.finish(AsyncTask.java:636)
at android.os.AsyncTask.access$500(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:653)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
at libcore.io.IoBridge.open(IoBridge.java:442)
at java.io.FileInputStream.<init>(FileInputStream.java:76)
at com.blo.ifo.ifocusblogs.InsertAndroidPost.doFileUpload(InsertAndroidPost.java:267)
at com.blo.ifo.ifocusblogs.InsertAndroidPost.access$400(InsertAndroidPost.java:50)
at com.blo.ifo.ifocusblogs.InsertAndroidPost$InsertServerAndroidAdminPost.onPostExecute(InsertAndroidPost.java:539)
at com.blo.ifo.ifocusblogs.InsertAndroidPost$InsertServerAndroidAdminPost.onPostExecute(InsertAndroidPost.java:445)
at android.os.AsyncTask.finish(AsyncTask.java:636)
at android.os.AsyncTask.access$500(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:653)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
06-17 10:43:21.484 16788-16788/com.blo.ifo.ifocusblogs D/AndroidRuntime﹕ Shutting down VM
06-17 10:43:21.487 16788-16788/com.blo.ifo.ifocusblogs E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.blo.ifo.ifocusblogs, PID: 16788
java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.InputStream java.net.HttpURLConnection.getInputStream()' on a null object reference
at com.blo.ifo.ifocusblogs.InsertAndroidPost.doFileUpload(InsertAndroidPost.java:322)
at com.blo.ifo.ifocusblogs.InsertAndroidPost.access$400(InsertAndroidPost.java:50)
at com.blo.ifo.ifocusblogs.InsertAndroidPost$InsertServerAndroidAdminPost.onPostExecute(InsertAndroidPost.java:539)
at com.blo.ifo.ifocusblogs.InsertAndroidPost$InsertServerAndroidAdminPost.onPostExecute(InsertAndroidPost.java:445)
at android.os.AsyncTask.finish(AsyncTask.java:636)
at android.os.AsyncTask.access$500(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:653)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
我的 PHP 脚本：
<?php
// Where the file is going to be placed
$target_path = "uploads/";
/* Add the original filename to our target path.
Result is "uploads/filename.extension" */
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['uploadedfile']['name']).
" has been uploaded";
chmod ("uploads/".basename( $_FILES['uploadedfile']['name']), 0644);
} else{
echo "There was an error uploading the file, please try again!";
echo "filename: " . basename( $_FILES['uploadedfile']['name']);
echo "target_path: " .$target_path;
}
?>
我能够获取选定的文件名和传递给上传文件的相同名称。我在清单中拥有所有必需的权限。请让我知道我的错误。欢迎所有建议。如果需要更多详细信息，请告诉我。提前致谢。
