Question

我有一个选择图像的Android应用程序。文件uri正确获取。

RequestBody requestFile=null;
        File file=null;
        String filePath=getPath(fileUri).trim(); // getting same filepath choosing via gallery or other file manager
        if (fileUri!= null )
            try{
                if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
                file = FileUtils.getFile(getActivity(),fileUri); // neglect this line Iam using api below 19
                else {
                    file=new File(filePath); // TODO: 30-Mar-17 CORRECT THE ERROR FOR API BELOW 19
                }
                String haaii="sdf";
                String g=file.getAbsolutePath(); //excecuting when choosing file manager.
                requestFile = RequestBody.create(
                        MediaType.parse(context.getContentResolver().getType(fileUri)),
                        file
                );  // weired not excecuting..null pointer expet choosing via gallery
            }catch (Exception e){
                Log.e("multipart",e.toString());
            }
            else Log.e("fileuri","uri is null");

路径方法

public String getPath(Uri uri) {

        String path = null;
        String[] projection = { MediaStore.Files.FileColumns.DATA };
        Cursor cursor = getActivity().getContentResolver().query(uri, projection, null, null, null);

        if(cursor == null){
            path = uri.getPath();
        }
        else{
            cursor.moveToFirst();
            int column_index = cursor.getColumnIndexOrThrow(projection[0]);
            path = cursor.getString(column_index);
            cursor.close();
        }

        return ((path == null || path.isEmpty()) ? (uri.getPath()) : path);
    }

选择文件

Intent intent = new Intent();
        // Show only images, no videos or anything else
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        // Always show the chooser (if there are multiple options available)
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);

使用

获得结果

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {

            uri = data.getData();

            try {
                Bitmap bitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), uri);
                // Log.d(TAG, String.valueOf(bitmap));

                photo.setImageBitmap(bitmap);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

通过文件管理器选择时 - 确认错误

E/multipart: java.lang.NullPointerException

通过画廊选择-ok 但错误很奇怪。通过画廊选择时，没关系。但是当使用文件管理器获取空指针异常时。但是，当通过文件管理器或库选择时，字符串值filePath是相同的。 如何解决这个问题？但是当我删除try catch块时，没有显示空指针异常，但下一行没有执行..

文件选择错误

0 个答案: