android 11后对文件读写访问权限管理 与 android 10又有了新的要求,导致在读写或者访问时出现error:java.io.FileNotFoundException: /storage/emulated/0/file_path open failed: EACCES (Permission denied),以下为android 11文件管理权限申请办法
import android.provider.Settings
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R){
val uri = Uri.parse("package:${BuildConfig.APPLICATION_ID}")
startActivity(
Intent(
Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION,
uri
)
)
}
回忆android 10 文件访问权限申请
step 1: AndroidManifest中添加权限申请配置
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
<application android:requestLegacyExternalStorage="true">
<provider android:name="androidx.core.content.FileProvider"
android:authorities="com.xxx.xxx.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths_app" />
</provider>
</application>
step 2: res/xml 资源文件夹下创建file_paths_app.xml 名称可以随意,与provider中配置resource同步
<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">
<paths>
<external-path
name="external-path"
path="." />
<external-files-path
name="external-files-path"
path="." />
<external-cache-path
name="external-cache-path"
path="." />
<files-path
name="files-path"
path="." />
<cache-path
name="cache-path"
path="." />
</paths>
</resources>
Tag 对应的路径
root-path 根目录/
files-path /data/user/0/<package_name>/files 或者/data/data/<package_name>/files 这两个目录指向相同的位置
cache-path /data/user/0/<package_name>/cache 或者 /data/data/<package_name>/cache
external-path /storage/emulated/0或者/sdcard/
external-files-path /storage/emulated/0/Android/data/<package_name>/files 或者 /sdcard/Android/data/<package_name>/files
external-cache-path /storage/emulated/0/Android/data/<package_name>/cache 或者 /sdcard/Android/data/<package_name>/cache
step 3:调用文件读写权限申请
AppPermissionReq.INSTANCE.permissionReq(
this,
defPermissions,
object : PassPermission {
override fun unauthorized() {
}
override fun authorized() {
}
})