FileProvider - IllegalArgumentException:未能找到配置的根

我试图用相机拍照，但我得到以下错误:

FATAL EXCEPTION: main
Process: com.example.marek.myapplication, PID: 6747
java.lang.IllegalArgumentException: Failed to find configured root that contains /storage/emulated/0/Android/data/com.example.marek.myapplication/files/Pictures/JPEG_20170228_175633_470124220.jpg
    at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:711)
    at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:400)
    at com.example.marek.myapplication.MainActivity.dispatchTakePictureIntent(MainActivity.java:56)
    at com.example.marek.myapplication.MainActivity.access$100(MainActivity.java:22)
    at com.example.marek.myapplication.MainActivity$1.onClick(MainActivity.java:35)

AndroidManifest.xml:

<provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="com.example.marek.myapplication.fileprovider"
        android:enabled="true"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
</provider>

Java:

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) {
            Toast.makeText(getApplicationContext(), "Error while saving picture.", Toast.LENGTH_LONG).show();
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            Uri photoURI = FileProvider.getUriForFile(this,
                    "com.example.marek.myapplication.fileprovider",
                    photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
        }
    }

file_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <files-path name="my_images" path="images/"/>
</paths>

我一整天都在搜索这个错误，试图理解FileProvider，但我不知道这个错误消息试图告诉我什么。如果你想要更多信息/代码，请在评论中告诉我。

当前回答

我有同样的问题，我尝试了下面的代码为其工作。

1.创建Xmlfile: provider_paths

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <files-path name="my_images" path="myfile/"/>
</paths>

2. Mainfest排队

 <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.ril.learnet.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"/>
 </provider>

3.在你的Java文件中。

      File file =  new File(getActivity().getFilesDir(), "myfile");
        if (!file.exists()) {
            file.mkdirs();
        }
        String  destPath = file.getPath() + File.separator + attachmentsListBean.getFileName();

               file mfile = new File(destPath);
                Uri path;
                Intent intent = new Intent(Intent.ACTION_VIEW);
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
                {
                    path = FileProvider.getUriForFile(AppController.getInstance().getApplicationContext(), AppController.getInstance().getApplicationContext().getPackageName() + ".provider", mfile );
                    intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                } else {
                    path = Uri.fromFile(mfile);
                }
   intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    intent.setDataAndType(path, "image/*");
                    getActivity().startActivity(intent);

2018-04-19 10:08:58

其他回答

xml file_paths文件中的以下更改对我有用。

 <external-files-path name="my_images" path="Pictures"/>
 <external-files-path name="my_movies" path="Movies"/>

2018-03-03 15:28:04

如果没有任何帮助，你会得到错误

failed to find configured root that contains /data/data/...

然后试着改变一些线，比如:

File directory = thisActivity.getDir("images", Context.MODE_PRIVATE);

to:

File directory = new File(thisActivity.getFilesDir(), "images");

在XML文件中:

<files-path name="files" path="." />

这很奇怪，因为我访问的文件夹是/images。

2018-10-10 21:36:57

来自@CommonsWare的答案很棒。

但在我的例子中，我必须添加多条路径。

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path name="external_files" path="." />
    <files-path name="external_files" path="." />
</paths>

2020-08-13 09:16:27

我确信我是迟到了，但以下几点对我很有用。

<paths>
    <root-path name="root" path="." />
</paths>

2019-03-13 20:10:24

这取决于你想做什么类型的存储，内部还是外部

用于外部存储

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-files-path name="my_images" path="my_images" />
</paths>

但是对于INTERNAL STORAGE，要小心路径，因为它使用getFilesDir()方法这意味着你的文件将位于应用程序的根目录("/")

  File storeDir = getFilesDir(); // path "/"

所以你的提供者文件必须是这样的:

<paths>
    <files-path name="my_images" path="/" />
</paths>

2018-06-28 23:49:03

FileProvider - IllegalArgumentException:未能找到配置的根

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