ACTION_IMAGE_CAPTURE onActivityResult 的意图为空,数据为空

ACTION_IMAGE_CAPTURE onActivityResult has empty intent with empty data

阅读此文档后https://developer.android.com/training/camera/photobasics我想拍照并将照片的 uri 存储到给定变量中。问题是我使用 takePictureIntent.putExtra(Constants.INTENT_EXTRA_VARNAME, variable)takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI) 将变量名和 uri 存储到意图中,但在 onActivityResult 中,意图数据为空,并且存储的变量和 uri 都不为空。我需要知道 uri 和变量。我究竟做错了什么?

我需要将信息作为意图数据传递,因为触发显示相机动作的 class 与 activity class.

不同

class 动作:

    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    takePictureIntent.putExtra(Constants.INTENT_EXTRA_VARNAME, variable);
    // Ensure that there's a camera activity to handle the intent
    if (takePictureIntent.resolveActivity(SectionManager.getInstance().getCurrentActivity().getPackageManager()) != null) {
        // Create the File where the photo should go
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            Uri photoURI = FileProvider.getUriForFile(SectionManager.getInstance().getCurrentActivity(), SectionManager.getInstance().getCurrentActivity().getPackageName(), photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            SectionManager.getInstance().getCurrentActivity().startActivityForResult(takePictureIntent, Constants.REQUEST_IMAGE_CAPTURE);
        }
    }

my activity 收到结果:

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if( requestCode == Constants.REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK){
        String varName;
        String path;

        if(intent != null) {
            varName = intent.getStringExtra(Constants.INTENT_EXTRA_VARNAME);
            path = Util.getRealPathFromURI(SectionManager.getInstance().getCurrentActivity(), intent.getData());
            Log.d(DEBUG_TAG, "onActivityResult-> varName: "+varName+" path: "+path);
            if (varName != null && path != null) {
                VariableManager.put(varName, path);
            }
        }
    }
}

清单、许可 write_external_storage 和此代码:

    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="${applicationId}"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths"></meta-data>
    </provider>

file_paths.xml 文件:

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="my_images" path="/" />
</paths>

您已经有 photoURI,您用 MediaStore.EXTRA_OUTPUT 发送了它,因此您可以简单地使用它。将 photoURI 保存为全局并直接使用它。查看是否发出 RESULT_OK 则表示图片已被单击并将保存在 EXTRA_OUTPUT 位置。

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if( requestCode == Constants.REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK){
        // USe photoURi here
    }
}

您不能指望某些 Constants.INTENT_EXTRA_VARNAME 的自定义键将 return 与系统相机 Intent。我对这种事情一无所知。
如果您指定 MediaStore.EXTRA_OUTPUT ,拍摄的图像将写入该路径,并且不会向 onActivityResult 提供任何数据,因此您需要保留文件路径。

PS :您可以全局保存它,并确保在 onSaveInstanceState() 期间保留它。