Question

错误：无法提供结果ResultInfo {who = null，request = 100， result = -1，data = Intent { DAT =含量：//com.android.providers.media.documents/document/image：28362 flg = 0x1}}到活动 {com.projectbox.uploadfile / com.projectbox.uploadfile.MainActivity}： java.lang.NullPo

  @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == PICK_IMAGE && resultCode == Activity.RESULT_OK) {
        android.net.Uri selectedImage = data.getData();
        String[] filePathColumn = {MediaStore.Images.Media.DATA};
        android.database.Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
        if (cursor == null)
            return;

        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String filePath = cursor.getString(columnIndex);
        cursor.close();

        File file = new File(filePath);

        RequestBody reqFile = RequestBody.create(MediaType.parse("image/*"), file);
        MultipartBody.Part body = MultipartBody.Part.createFormData("banner", file.getName(), reqFile);
        RequestBody name = RequestBody.create(MediaType.parse("text/plain"), "banner");

        Log.d("THIS", data.getData().getPath());

        retrofit2.Call<okhttp3.ResponseBody> req = service.postImage(body, name);
        req.enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {

            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Log.e("FFF", t.getMessage());
                t.printStackTrace();
            }
        });
    }
}

错误堆栈：

Process: com.projectbox.uploadfile, PID: 17822
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=100, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/image:28362 flg=0x1 }} to activity {com.projectbox.uploadfile/com.projectbox.uploadfile.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:4220)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4263)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1601)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6349)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:893)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
Caused by: java.lang.NullPointerException
at java.io.File.<init>(File.java:262)
at com.projectbox.uploadfile.MainActivity.onActivityResult(MainActivity.java:110)
at android.app.Activity.dispatchActivityResult(Activity.java:7025)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4216)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4263) 
at android.app.ActivityThread.-wrap20(ActivityThread.java)

Answer 1

似乎filepath为null。您正在尝试使用mediastore DATA列从content:// URI获取文件。这可能会或可能不会像Mark Murphy在How to Consume Content From a Uri中所解释的那样发挥作用。

获取内容的唯一可靠方法是使用ContentResolver.openInputStream()

然后，您可以在上传之前将流复制到文件中，也可以按照此OkHttp recipe的说明直接上传流。

Answer 2

您在此处获得错误的图像路径或相对图像路径。我认为一定是问题所在..

尝试替换

        String[] filePathColumn = {MediaStore.Images.Media.DATA};
        android.database.Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
        if (cursor == null)
            return;

        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String filePath = cursor.getString(columnIndex);
        cursor.close();

以

Cursor cursor = null;
Uri contentUri = data.getData();
String filepath = "";
        try {
            String[] proj = {MediaStore.Images.Media.DATA};
            cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            filePath = cursor.getString(column_index);
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }

希望这能解决你的问题。

Answer 3

尝试启用开发人员选项中的活动...这可能是我之前遇到的原因之一

Answer 4

if(!cursor.moveToFirst())或if(TextUtils.isEmpty(filePath))您应该从方法返回：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == PICK_IMAGE && resultCode == Activity.RESULT_OK) {
        android.net.Uri selectedImage = data.getData();
        String[] filePathColumn = {MediaStore.Images.Media.DATA};
        android.database.Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
        if (cursor == null)
            return;

        if(!cursor.moveToFirst()){
            cursor.close();
            return;
         }   
        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String filePath = cursor.getString(columnIndex);
        cursor.close();
        if(TextUtils.isEmpty(filePath))
          return;

        File file = new File(filePath);

        RequestBody reqFile = RequestBody.create(MediaType.parse("image/*"), file);
        MultipartBody.Part body = MultipartBody.Part.createFormData("banner", file.getName(), reqFile);
        RequestBody name = RequestBody.create(MediaType.parse("text/plain"), "banner");

        Log.d("THIS", data.getData().getPath());

        retrofit2.Call<okhttp3.ResponseBody> req = service.postImage(body, name);
        req.enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {

            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Log.e("FFF", t.getMessage());
                t.printStackTrace();
            }
        });
    }
}

Answer 5

你可以这样做。

if (requestCode == 3 && resultCode == RESULT_OK && data != null && data.getData() != null) {

            Uri uri = data.getData();

            try {
                String[] filePathColumn = {MediaStore.Images.Media.DATA};
                Cursor cursor = getContentResolver().query(uri, filePathColumn, null, null, null);
                cursor.moveToFirst();
                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                //  picturePath = cursor.getString(columnIndex);

                // try to copy image 1
                File destination = new File(Environment.getExternalStorageDirectory(),
                        System.currentTimeMillis() + ".jpg");
                picturePath = "" + destination;
                cursor.close();
                img_member.setTag(picturePath);
                Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);

                ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                bitmap.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
                FileOutputStream fo;
                try {
                    destination.createNewFile();
                    fo = new FileOutputStream(destination);
                    fo.write(bytes.toByteArray());
                    fo.close();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                img_member.setImageBitmap(bitmap);
                mBottomSheetDialog.hide();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

OnActivityResult活动错误：传递结果ResultInfo失败

5 个答案:

尝试替换

以