android - 找不到提供程序错误的元数据

Question

这个问题在这里已经有了答案:





how to fix an authority error in android studio

(2 个回答)



Couldn't find meta-data for provider with authority

(16 个答案)


2年前关闭。




我正在尝试开发一个拍摄照片的应用程序，然后将它们上传到数据库。现在我被困在拍一张高质量的照片上。正如我之前所读到的，要获得更好质量的照片，您需要将其保存在您的目录中。我正在关注 Google Take Photos
从开发人员的说明中，并在添加所有方法和提供者等之后，我得到了错误:

Couldn't find meta-data for provider with authority com.example.navigationdrawerfinal. 

我留下了我的应用程序的名称，所以每个人都可以看到我也在 list 中更改了它。

显现:

<provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="com.example.navigationdrawerfinal.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
    </provider>
    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="@string/google_maps_key" />

文件路径.xml:

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

以及我使用它的代码:

private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // Ensure that there's a camera activity to handle the intent
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        // Create the File where the photo should go
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {
            // Error occurred while creating the File
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            Uri photoURI = FileProvider.getUriForFile(this,
                    "com.example.navigationdrawerfinal",
                    photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
            poza_neincarcata.setVisibility(View.GONE);
            poza_tick.setVisibility(View.VISIBLE);
        }
    }
}


private File createImageFile() throws IOException {
        // Create an image file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        String imageFileName = "JPEG_" + timeStamp + "_";
        File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
        File image = File.createTempFile(
                imageFileName,  /* prefix */
                ".jpg",         /* suffix */
                storageDir      /* directory */
        );

        // Save a file: path for use with ACTION_VIEW intents
        currentPhotoPath = image.getAbsolutePath();
        return image;
    }

Answer 1

如错误所示(重点是我的):

Couldn't find meta-data for provider with authority com.example.navigationdrawerfinal.

这是因为您指定了不正确的 FileProvider photoURI 需要您定义的变量 - 它应该与 FileProvider 完全相同您已在 list 文件中定义，区分大小写:

Uri photoURI = FileProvider.getUriForFile(this,
                    "com.example.navigationdrawerfinal.fileprovider", // Over here
                    photoFile);

顺便说一句，最好遵循 Java 指南，以 PascalCase 格式命名您的类。

例如:

FileProvider对比 fileprovider

MainActivity对比 mainActivity

等等