As Error:Failed to find configured root that contains /storage/emulated/0/xxx/xxx/xxx.png

发生场景：

引用第三方包，启动它的拍照功能的时候直接闪退

java.lang.IllegalArgumentException: Failed to find configured root that contains
/storage/emulated/0/PictureSelector/CameraImage/PictureSelector_20190704_135543.pngat android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:739)at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:418)at com.luck.picture.lib.PictureSelectorActivity.parUri(PictureSelectorActivity.java:444)at com.luck.picture.lib.PictureSelectorActivity.startOpenCamera(PictureSelectorActivity.java:378)at com.luck.picture.lib.PictureSelectorActivity.startCamera(PictureSelectorActivity.java:353)at com.luck.picture.lib.PictureSelectorActivity$10.onNext(PictureSelectorActivity.java:753)at com.luck.picture.lib.PictureSelectorActivity$10.onNext(PictureSelectorActivity.java:744)

查阅资料发现原来是手机android系统版本有关，自己的手机是Andriod 9.0的，对文件的管理权限有所要求

第一步，指定一个FileProvider。在AndroidManifest.xml中声明一个条目

<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.example.myapp"><application...><providerandroid:name=".app.MyFileProvider"android:authorities="${applicationId}.provider"android:exported="false"android:grantUriPermissions="true"><meta-dataandroid:name="android.support.FILE_PROVIDER_PATHS"android:resource="@xml/provider_paths"tools:replace="android:resource" /></provider>...</application>
</manifest>

第二步，需要在项目的res->xml下添加：provider_paths.xml

external-path目录下指定想分享的目录，name可以随意但尽量避免跟上面的一样，path指定所需目录

然后在最下面添加如下：

<?xml version="1.0" encoding="utf-8"?>
<paths>
.........<external-pathname="picture_selector"path="PictureSelector/" />
</paths>

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