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

你需要确保file_paths.xml文件的内容包含这个字符串=> "/Android/data/com.example.marek.myapplication/files/Pictures/"

从错误消息中，这是存储图片的路径。见预期样本

files_path.xml如下:

<external-path name="qit_images" path="Android/data/com.example.marek.myapplication/files/Pictures/" />

2019-05-17 12:12:20

其他回答

您需要将xml文件file_paths.xml从

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

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <exeternal-path name="my_images" path="Android/data/com.example.marek.myapplication/files/Pictures"/>
</paths>

2019-03-06 14:36:21

花了两周时间试图找到一些解决方案…如果你在尝试了以上所有方法后到达这里:

1 -验证你的标签提供者是否在标签应用程序内

<application>

    <provider android:name="android.support.v4.content.FileProvider" android:authorities="com.companyname.Pocidadao.fileprovider" android:exported="false" android:grantUriPermissions="true">
      <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths"></meta-data>
    </provider>

</application>

2 -如果你尝试了很多方法都没有成功，那么就用这个方法来测试:

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

  <root-path name="root" path="." />
  <files-path name="my_images" path="/" />
  <files-path name="my_images" path="myfile/"/>
  <files-path name="files" path="." />

  <external-path name="external_files" path="." />
  <external-path name="images" path="Pictures" />
  <external-path name="my_images" path="." />
  <external-path name="my_images" path="Android/data/com.companyname.yourproject/files/Pictures" />
  <external-path name="my_images" path="Android/data/com.companyname.yourproject/files/Pictures/" />

  <external-files-path name="images" path="Pictures"/>
  <external-files-path name="camera_image" path="Pictures/"/>
  <external-files-path name="external_files" path="." />
  <external-files-path name="my_images" path="my_images" />

  <external-cache-path name="external_cache" path="." />

</paths>

测试这个，如果相机工作，然后开始消除一些线，并继续测试…

3 -不忘记验证相机是否在模拟器中激活。

2019-04-27 17:25:28

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

试试这个

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

2017-09-14 11:41:29

我的问题是，我在不同类型的文件路径中有重叠的名称，就像这样:

<cache-path
    name="cached_files"
    path="." />
<external-cache-path
    name="cached_files"
    path="." />

在我将名称(“cached_files”)更改为唯一后，我摆脱了错误。我的猜测是，这些路径存储在一些HashMap或不允许重复的东西中。

2018-10-23 08:09:22

FileProvider - IllegalArgumentException:未能找到配置的根

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