ACTION_IMAGE_CAPTURE返回图像文件作为Extra而不是Data [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，然后应用程序显示图像.

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开始意图，并通过onActivityResult捕获响应. 通常，我可以根据在onActivityResult中收到的意图简单地调用 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:我的测试设备之一，华为ALE-L21，我在onActivityResult中获得的意图没有数据，但是，它具有可分解的额外功能.我如何从中获取用户照片? Android Studio也不告诉我多余的部分的名称

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:我之所以调用getActivity()是因为我正在片段中使用此代码

这就是我用来获取相机的东西.

This is what I use to get the camera.

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));
}

---

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，我可以简单地在onActivityResult中收到的意图上调用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.

您的代码将无法在许多设备上使用，包括所有最新的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:

如果不存在EXTRA_OUTPUT，则会在Extra字段中将一个小型图像作为Bitmap对象返回.这对于只需要较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.

由于您不包括EXTRA_OUTPUT，因此您将获得带有缩略图的data附加(getData().getExtra("data")).

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，但是，它具有可分解的额外内容

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

给出您的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，也许指向您应用中的FileProvider，例如我在

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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