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

更改main/res/xml/provider_paths.xml

从

<paths>
    <files-path path="images/" name="myimages" />
    <external-path name="download" path="download/"/>
</paths>

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

2022-11-17 05:56:31

其他回答

这对我也很管用。而不是给完整的路径，我给了path="Pictures"，它工作得很好。

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

2018-04-13 07:23:04

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

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

我注意到，关于path.xml文件的策略或行为在支持库26和27之间发生了变化。为了从相机中捕捉照片，我看到了以下变化:

对于26，我必须使用<external-path>和path参数中给出的完整路径。对于27，我必须使用<external-files-path>，并且只使用path参数中的子文件夹。

因此，支持库27的path.xml文件对我特别有用

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

2018-04-06 13:09:17

请注意，external-path不是指向二级存储，即“可移动存储”(尽管名称为“external”)。如果你得到“未能找到配置的根”，你可以将这一行添加到你的XML文件中。

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

更多细节请参见FileProvider和次要外部存储

2018-07-29 17:33:13

FileProvider - IllegalArgumentException:未能找到配置的根

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