7.0获取文件目录

1

 <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.picker.fileprovider"
            android:grantUriPermissions="true"
            android:exported="false">
            <!--元数据-->
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_path" />
        </provider>,

2

3，

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

4

   Uri imageUri = FileProvider.getUriForFile(this, "picker.fileprovider", file);