ACTION_IMAGE_CAPTURE 将图像文件作为额外而不是数据返回 [英] ACTION_IMAGE_CAPTURE returns imagefile as Extra instead of Data

问题描述

我的应用程序的一个功能包括相机.用户拍照，应用显示图像.

One feature of my app includes the camera. The user takes a picture and the app displays the image.

我使用 StartActivityForResult 从 ACTION_IMAGE_CAPTURE 开始一个意图，并使用 onActivityResult 捕获响应.通常我可以简单地根据我在 onActivityResult 中收到的意图调用 getData() 并获取 MediaProvider 的内容 uri.

I start an intent with ACTION_IMAGE_CAPTURE using StartActivityForResult and capture the response with onActivityResult. Usually I can simply call getData() on the intent I receive in onActivityResult and get the content uri for the MediaProvider.

我的问题如下:我的一个测试设备是华为 ALE-L21，我在 onActivityResult 中获得的意图没有数据，而是有一个可拆分的额外内容.我怎么能从中得到用户的照片?Android Studio 也没有告诉我这个 parcellable extra 的名称

My problem is the following: One one of my test devices, a Huawei ALE-L21, the intent I get in onActivityResult has no data, but instead, it has a parcellable extra. How could I get the users photo from that? Android Studio doesn't tell me the name of the parcellable extra either

免责声明:我调用 getActivity() 是因为我在片段中使用此代码

这是我用来拿相机的.

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getActivity().getPackageManager()) != null) {
    startActivityForResult(takePictureIntent, getResources().getInteger(R.integer.RQ_PERMISSION_WRITE_EXTERNAL_STORAGE));
}

<小时>

这是我的 onActivityResult 中的代码

---

And here's the code in my onActivityResult

@Override
public void onActivityResult(int requestCode, int resultCode, Intent resultIntent) {
    super.onActivityResult(requestCode, resultCode, resultIntent);

    switch (requestCode) {
        case 1: //RQ_ImageCapture
        case 2: //RQ_ImageSelected
            if (resultIntent != null) {
                try {
                    Uri selectedImage = resultIntent.getData();
                    if(selectedImage != null) {
                        Bitmap bitmap = 
                        MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), selectedImage);
                        setImageAsBackground(selectedImage, bitmap);
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            break;
    }
}

推荐答案

通常我可以简单地根据我在 onActivityResult 中收到的意图调用 getData() 并获取 MediaProvider 的内容 uri.

Usually I can simply call getData() on the intent I receive in onActivityResult and get the content uri for the MediaProvider.

您的代码在其中许多设备上都会失败，包括所有最近的 Nexus 设备.ACTION_IMAGE_CAPTURE 不应返回 Uri.引用文档:

Your code will fail on many of them, including all recent Nexus devices. ACTION_IMAGE_CAPTURE is not supposed to return a Uri. Quoting the documentation:

如果 EXTRA_OUTPUT 不存在，则在额外字段中将小尺寸图像作为位图对象返回.这对于只需要小图像的应用程序很有用.如果存在 EXTRA_OUTPUT，则将全尺寸图像写入 EXTRA_OUTPUT 的 Uri 值.

If the EXTRA_OUTPUT is not present, then a small sized image is returned as a Bitmap object in the extra field. This is useful for applications that only need a small image. If the EXTRA_OUTPUT is present, then the full-sized image will be written to the Uri value of EXTRA_OUTPUT.

由于你没有包含 EXTRA_OUTPUT，你会得到一个额外的 data (getData().getExtra("data"))缩略图.

Since you are not including EXTRA_OUTPUT, you will get a data extra (getData().getExtra("data")) with a thumbnail image.

我在 onActivityResult 中获得的意图没有数据，而是有一个可拆分的额外内容

the intent I get in onActivityResult has no data, but instead, it has a parcellable extra

鉴于您的 ACTION_IMAGE_CAPTURE 请求，这就是您应该得到的.

Given your ACTION_IMAGE_CAPTURE request, that is what you are supposed to get.

如果您想要全尺寸图片，请包含 EXTRA_OUTPUT，可能指向您应用中的 FileProvider，例如我在 这个示例应用.然后，您知道照片应该放在哪里的 Uri，因为您指定了 Uri.

If you want a full-size image, include EXTRA_OUTPUT, perhaps pointing to a FileProvider in your app, such as I demonstrate in this sample app. Then, you know the Uri where the photo should go, because you specified that Uri.

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