无法获取提供者 androidx.core.content.FileProvider：java.lang.IllegalArgumentException：缺少 android.support.FILE_PROVIDER_PATHS 元数据？

Question

我看了很多这样的帖子，但仍然不知道问题是什么。我尝试在 file_paths.xml 中更改路径和名称。

file_paths.xml：

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path
name="pirosfogo_images"
path="storage/emulated/0/pictures/"/>
</paths>

AndroidManifest.xml：

<application
    ...
    <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="com.kijevigombooc.pirosfogo.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true"/>
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths" />
</application>

java:

void takePhoto(){
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
    {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 110);
    }
    else
    {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (intent.resolveActivity(getPackageManager()) != null)
        {
            File photoFile = createPhotoFile();
            if(photoFile != null){
                pathToFile = photoFile.getAbsolutePath();
                Uri photoURI = FileProvider.getUriForFile(ProfileEdit.this, "adada", photoFile);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
                startActivityForResult(intent, REQUEST_CAMERA);
            }
        }
    }
}
private File createPhotoFile() {
    String name = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    File storageDir = getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
    File image = null;
    try{
        image = File.createTempFile(name, ".jpg", storageDir);
    } catch(Exception e){}
    return image;
}

为什么我会收到错误消息？

Answer 1

这是因为您在错误的父级中指定了<meta-data> 标记（<application> 标记）。它应该在<provider> 标记中指定。 （下面两个代码sn-ps显示了区别：）

<application
    ...
    <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="com.kijevigombooc.pirosfogo.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
    </provider>
</application>

VS

<application
    ...
    <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="com.kijevigombooc.pirosfogo.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true"/>
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths" />
</application>