我正在尝试将 PDF文件上传到服务器但是根据我的方法获得Null吐司，我测试了TextView中的文件路径是可见的但是当涉及到uplaoding时似乎没有看到 PDF文件，正在使用ion library。下面是我的代码示例。
public void uploadFile(final String selectedFilePath){
final ProgressDialog pd;
pd = new ProgressDialog(MainActivity.this);
pd.setMessage("Uploading ...");
pd.setCancelable(false);
pd.show();
//File file = new File(this.getFilesDir().getAbsolutePath() + "/thesubdirectory/the.zip");
File f = new File(getApplicationContext().getFilesDir().getAbsolutePath()+selectedFilePath);
try {
RandomAccessFile rf = new RandomAccessFile(f, "rw");
rf.setLength(1024 * 1024 * 2);
} catch (Exception e) {
System.err.println(e);
}
File echoedFile = getFileStreamPath("echo");
Ion.with(MainActivity.this)
.load(SERVER_URL)
.uploadProgressDialog(pd)
.setMultipartFile("uploaded_file",f)
.write(echoedFile)
.setCallback(new FutureCallback<File>() {
@Override
public void onCompleted(Exception e, File result) {
try {
Toast.makeText(MainActivity.this, " " + result, Toast.LENGTH_LONG).show();
System.out.println("Error " + result);
pd.dismiss();
} catch (Exception e1) {
System.out.println("Error " + e1);
}
pd.dismiss();
}
});
}
这是代码的其余部分。
public class MainActivity extends AppCompatActivity {
private static final int PICK_FILE_REQUEST = 1;
private static final String TAG = MainActivity.class.getSimpleName();
private String selectedFilePath;
private String SERVER_URL = "http://192.168.43.104:8093/PoliceApp/FileUpload.aspx";
ImageView ivAttachment;
private ImageView imageView;
private EditText firstname_edt,lastname_edt,email_edt,jobtitle_edt,source_edt;
private TextView directory_txt,count_txt,upload_txt;
private Button button;
Future<File> uploading;
ProgressDialog pd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Enable global Ion logging
Ion.getDefault(this).configure().setLogging("ion-sample", Log.DEBUG);
setContentView(R.layout.activity_main);
imageView= (ImageView)findViewById(R.id.imageView);
firstname_edt=(EditText)findViewById(R.id.firstname_edt);
lastname_edt=(EditText)findViewById(R.id.lastname_edt);
email_edt=(EditText)findViewById(R.id.email_edt);
jobtitle_edt=(EditText)findViewById(R.id.jobtitle_edt);
source_edt=(EditText)findViewById(R.id.source_edt);
button=(Button)findViewById(R.id.button);
directory_txt=(TextView)findViewById(R.id.directory_txt);
count_txt=(TextView)findViewById(R.id.count_txt);
upload_txt=(TextView)findViewById(R.id.upload_txt);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showFileChooser();
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(selectedFilePath != null){
// pd = ProgressDialog.show(MainActivity.this,"","Uploading File...",true);
uploadFile(selectedFilePath);
// OnSendFileInfo();
}else{
Toast.makeText(MainActivity.this,"Please choose a File First",Toast.LENGTH_SHORT).show();
}
}
});
}
// Gallery pick
private void showFileChooser() {
Intent intent = new Intent();
//sets the select file to all types of files
intent.setType("*/*");
//allows to select data and return it
intent.setAction(Intent.ACTION_GET_CONTENT);
//starts new activity to select file and return data
startActivityForResult(Intent.createChooser(intent,"Choose File to Upload.."),PICK_FILE_REQUEST);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == Activity.RESULT_OK){
if(requestCode == PICK_FILE_REQUEST){
if(data == null){
//no data present
return;
}
Uri selectedFileUri = data.getData();
selectedFilePath = FilePath.getPath(this,selectedFileUri);
Log.i(TAG,"Selected File Path:" + selectedFilePath);
if(selectedFilePath != null && !selectedFilePath.equals("")){
directory_txt.setText(selectedFilePath);
}else{
Toast.makeText(this,"Cannot upload file to server",Toast.LENGTH_SHORT).show();
}
}
}
}
这是返回图库图像/文档/视频/音频
的文件路径的文件路径类public class FilePath {
/**
* Method for return file path of Gallery image/ Document / Video / Audio
*
* @param context
* @param uri
* @return path of the selected image file from gallery
*/
@TargetApi(19)
public static String getPath(final Context context, final Uri uri) {
// check here to KITKAT or new version
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/"
+ split[1];
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[] { split[1] };
return getDataColumn(context, contentUri, selection,
selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context
* The context.
* @param uri
* The Uri to query.
* @param selection
* (Optional) Filter used in the query.
* @param selectionArgs
* (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri,
String selection, String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = { column };
try {
cursor = context.getContentResolver().query(uri, projection,
selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri
.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri
.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri
.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri
.getAuthority());
}
}
答案 0 :(得分：0)
这是返回图库图像/文档/视频/音频
的文件路径的文件路径类
那个班级是一块垃圾。它不适用于任何Android设备上的许多Uri值，更不用说那些＆＃34;规则＆＃34;由于制造商的更改或操作系统更新，该类编码已更改。
此外，这些位置都不在getFilesDir()内。
正确使用Uri：使用ContentResolver和openInputStream()获取InputStream标识的内容Uri。将InputStream传递给Ion（如果它支持从流上传），或者使用流制作内容的本地副本（例如，进入getCacheDir()），然后上传本地副本。 / p>