Dateipfad Rückgabe null immer in Lollipop Android

Question

Dies ist mein Code, wenn ich Bild aus dem internen Speicher (Galerie) bekomme. Im Lollipop-Dateipfad gibt immer Null zurück.

if (requestCode == PICK_IMAGE) { 
     if(resultCode == RESULT_OK){ 
      //image successfully picked 
      // launching upload activity 
      Uri selectedImage = data.getData(); 
      String[] filePathColumn = { MediaStore.Images.Media.DATA }; 
      Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null); 
      cursor.moveToFirst(); 
      columnindex = cursor.getColumnIndex(MediaStore.Images.Media.DATA); 
      file_path = cursor.getString(columnindex); 
      Log.d(getClass().getName(), "file_path"+file_path); 
      fileUri = Uri.parse("file://" + file_path); 
      cursor.close(); 
      launchUploadActivity(true, PICK_IMAGE); 
     }else if (resultCode == RESULT_CANCELED) { 
      // user cancelled recording 
      Toast.makeText(getApplicationContext(),"User cancelled image selection", Toast.LENGTH_SHORT).show(); 
     } else { 
      // failed to record video 
      Toast.makeText(getApplicationContext(),"Sorry! failed to pick image", Toast.LENGTH_SHORT).show(); 
     } 

Answer 1

Vielen Dank, ich fand th Die Lösung.

Uri selectedImage = data.getData(); 
      String wholeID = DocumentsContract.getDocumentId(selectedImage); 

      // Split at colon, use second item in the array 
      String id = wholeID.split(":")[1]; 

      String[] column = { MediaStore.Images.Media.DATA };  

      // where id is equal to    
      String sel = MediaStore.Images.Media._ID + "=?"; 

      Cursor cursor = getContentResolver(). 
             query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, 
             column, sel, new String[]{ id }, null); 

      String filePath = ""; 

      int columnIndex = cursor.getColumnIndex(column[0]); 

      if (cursor.moveToFirst()) { 
       filePath = cursor.getString(columnIndex); 
      } 
      cursor.close(); 
      setImageFromIntent(filePath); 

Answer 2

hinzufügen Erlaubnis zu Ihrem Manifest -

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> 

Sie haben Leseberechtigung zu definieren, bevor alle Inhalte lesen.

EDITED

Aktualisieren Sie Ihren Code -

 Uri selectedImage = data.getData(); 
     String[] filePathColumn = { MediaStore.Images.Media.DATA }; 
     Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null); 

     columnindex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
     cursor.moveToFirst(); 
     file_path = cursor.getString(columnindex); 
     Log.d(getClass().getName(), "file_path"+file_path); 
     fileUri = Uri.parse("file://" + file_path); 
     cursor.close(); 
     launchUploadActivity(true, PICK_IMAGE); 

Also hier, wenn eine Ausnahmedaten von Cursor in immer dann wirft es Ausnahme.

Answer 3

Lollipop entschied sich für einen anderen Kurs mit dem Abrufen von Dateien aus dem System. (Manche sagen, es ist von KitKat, aber ich habe es noch nicht auf KitKat gefunden). Der folgende Code ist die Dateipfad auf Lutscher zu bekommen

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && 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.Audio.Media.EXTERNAL_CONTENT_URI; 
     } 

     final String selection = "_id=?"; 
     final String[] selectionArgs = new String[] { 
       split[1] 
     }; 

     String filePath = getDataColumn(context, contentUri, selection, selectionArgs); 
    } 

isMediaDocument:

public static boolean isMediaDocument(Uri uri) 
{ 
    return "com.android.providers.media.documents".equals(uri.getAuthority()); 
} 

getDataColumn:

private 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 column_index = cursor.getColumnIndexOrThrow(column); 
      return cursor.getString(column_index); 
     } 
    } finally { 
     if (cursor != null) 
      cursor.close(); 
    } 
    return null; 
} 

Wenn Sie immer noch Probleme haben, ist this die vollständige Antwort, die für Bilder überprüft , Audio, Video, Dateien usw.

Answer 4

///////////////////create file obj: 
private File mFileTemp; 

String state = Environment.getExternalStorageState(); 
     if (Environment.MEDIA_MOUNTED.equals(state)) { 
      mFileTemp = new File(Environment.getExternalStorageDirectory(), InternalStorageContentProvider.TEMP_PHOTO_FILE_NAME); 
     } 
     else { 
      mFileTemp = new File(getFilesDir(), InternalStorageContentProvider.TEMP_PHOTO_FILE_NAME); 
     } 
/////////////////// use in start activity for result 
try { 

        InputStream inputStream = getContentResolver().openInputStream(data.getData()); 
        FileOutputStream fileOutputStream = new FileOutputStream(mFileTemp); 
        copyStream(inputStream, fileOutputStream); 
        fileOutputStream.close(); 
        inputStream.close(); 

        imagepath = mFileTemp.getPath(); 

       } catch (Exception e) { 

        Log.e("TAG", "Error while creating temp file", e); 
       } 
///////////////// 
    public static void copyStream(InputStream input, OutputStream output) 
      throws IOException 
      { 
     byte[] buffer = new byte[1024]; 
     int bytesRead; 
     while ((bytesRead = input.read(buffer)) != -1) 
     { 
      output.write(buffer, 0, bytesRead); 
     } 
    }