Question

我正在尝试将相机捕获的图像保存在设备上。但它没有得救。

// ---清单

def delete_item(item_id):
    thing = Inventory.objects.get(pk=id)
    thing.item = None
    thing.save()

我使用以下代码：

<uses-permission android:name="ANDROID.PERMISSION.CAMERA" />
<uses-permission android:name="ANDROID.PERMISSION.WRITE_EXTERNAL_STORAGE" />

Answer 1

查看我在代码中为保存捕获的图像所做的工作。

/*************************** Camera Intent Start ************************/

            // Define the file-name to save photo taken by Camera activity

            String fileName = "Camera_Example.jpg";

            // Create parameters for Intent with filename

            ContentValues values = new ContentValues();

            values.put(MediaStore.Images.Media.TITLE, fileName);

            values.put(MediaStore.Images.Media.DESCRIPTION, "Image capture by camera");

            // imageUri is the current activity attribute, define and save it for later usage

            imageUri = getContentResolver().insert(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

            /**** EXTERNAL_CONTENT_URI : style URI for the "primary" external storage volume. ****/


            // Standard Intent action that can be sent to have the camera
            // application capture an image and return it.

            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

            intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);

            intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);

            startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

            /*************************** Camera Intent End ************************/


        }

onActivityResult方法在这里：

 @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {

        if (resultCode == RESULT_OK) {

            /*********** Load Captured Image And Data Start ****************/

            String imageId = convertImageUriToFile(imageUri, CameraActivity);


            //  Create and excecute AsyncTask to load capture image

            new LoadImagesFromSDCard().execute("" + imageId);

            /*********** Load Captured Image And Data End ****************/


        } else if (resultCode == RESULT_CANCELED) {

            Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();
        } else {

            Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();
        }
    }
}

Answer 2

//不要使用data.getData（），因为它在某些设备中返回null。

因此，使用光标获取捕获的图像。

@Override
protected void onActivityResult(int requestCode, int resultCode,
    Intent resultData) {
super.onActivityResult(requestCode, resultCode, resultData);

    if (resultData != null) {

    String[] projection = { MediaStore.Images.Media.DATA };
            Cursor cursor = managedQuery(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                    projection, null, null, null);
            int column_index_data = cursor
                    .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToLast();

            String imagePath = cursor.getString(column_index_data);
            Bitmap bitmapImage = BitmapFactory.decodeFile(imagePath );
            imageView.setImageBitmap(bitmapImage );

        }

捕获的图像不会保存在设备上

2 个答案: