Record the basic usage of FileProvider in Android

1. Create a new file_paths.xml file in the res/xml directory (if there is no xml directory, please create a new one) (the file name is customized, and file_paths is used as an example here).

2. In the newly created file_paths.xml file, the simple code is as follows:

   <paths>
   <external-path
       name="my_path"  //自定义
       path="" />
   </paths>
   

   There are not only external-paths in paths, but also several other paths, each corresponding to a different storage directory. Not delved into it here. When using it, pay attention to the settings of the corresponding permissions.

3. Add provider in application block in AndroidManifest.xml manifest file

   <provider
       android:name="android.support.v4.content.FileProvider"
       android:authorities="应用包名"   //一般为应用包名
       android:exported="false"
       android:grantUriPermissions="true">
       <meta-data
           android:name="android.support.FILE_PROVIDER_PATHS"
           android:resource="@xml/files_path" />    //与res/xml目录中新建的xml文件对应
   </provider>
   

4. used in code

   Uri uri = FileProvider.getUriForFile(context, FILE_PROVIDER_AUTHORITY, file);
   where FILE_PROVIDER_AUTHORITY corresponds to the android:authorities attribute value in the AndroidManifest.xml manifest file.