Android 11禁止了普通用户对Android/data目录的访问,所有采用之前的方法已经无法访问Android/data目录了.
正确的方式是使用Google官方提供的SAF框架来获取Android/data目录的访问.
具体可参照GitHub上我的工具类Utils
代码如下
快乐学习
package cn.yanjingtp.utils.utils
import android.annotation.SuppressLint
import android.content.Intent
import android.net.Uri
import android.os.Build
import android.provider.DocumentsContract
import androidx.activity.result.ActivityResultLauncher
import androidx.activity.result.contract.ActivityResultContracts
import androidx.appcompat.app.AppCompatActivity
import androidx.documentfile.provider.DocumentFile
import cn.yanjingtp.utils.base.CxtUtil
import java.net.URLEncoder
import java.nio.charset.StandardCharsets
/**
* 存储访问框架 (SAF)相关
* 1.在onCreate中注册registerForActivityResult
* 2.调用getSAFGrant判断目标目录是否有权限
* 3.没有权限调用getSAFGrant
* 4.当有权限的时候调用getDocumentFilePath获取name,uri等信息
*/
/**
* 判断是否已经获取了指定Data目录权限
* @param targetPath 目标目录 如:Android/data/com.tencent.mm/MicroMsg/Download
*/
fun getSAFGrant(targetPath: String): Boolean {
for (persistedUriPermission in CxtUtil.getCxt().contentResolver.persistedUriPermissions) {
if (persistedUriPermission.isReadPermission && persistedUriPermission.uri.toString() == "content://com.android.externalstorage.documents/tree/primary%3A${
URLEncoder.encode(targetPath, StandardCharsets.UTF_8.name())
}") {
return true
}
}
return false
}
/**
* 获取指定Data目录权限
* @param targetPath 目标目录 如:Android/data/com.tencent.mm/MicroMsg/Download
*/
fun getSAFGrant(targetPath: String, startActivity: ActivityResultLauncher<Intent>?) {
val uri: String = changeToUri(targetPath)
val parse = Uri.parse(uri)
val intent = Intent("android.intent.action.OPEN_DOCUMENT_TREE")
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION or Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION or Intent.FLAG_GRANT_PREFIX_URI_PERMISSION)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, parse)
}
startActivity?.launch(intent)
}
/**
* 在onActivityResult中的回调,并保存这个目录的访问权限
*/
@SuppressLint("WrongConstant")
fun registerForActivityResult(activity: AppCompatActivity): ActivityResultLauncher<Intent> {
return activity.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { activityResult ->
//保存这个目录的访问权限
activityResult.data?.data?.let {
CxtUtil.getCxt().contentResolver.takePersistableUriPermission(it,
(Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION) and activityResult.data!!.flags)
}
}
}
/**
* 直接返回DocumentFile,可通过DocumentFile获取到name,uri等信息
* @param targetPath 目标目录 如:Android/data/com.tencent.mm/MicroMsg/Download
*/
fun getDocumentFilePath(targetPath: String): DocumentFile? {
return DocumentFile.fromTreeUri(CxtUtil.getCxt(), Uri.parse(changeToUri(targetPath)))
}
/**
* 转换至uriTree的路径
*/
private fun changeToUri(path: String):String {
val dealPath = if (path.startsWith("/storage/emulated/0/")) path.replace("/storage/emulated/0/","") else path
return "content://com.android.externalstorage.documents/tree/primary%3A${URLEncoder.encode(dealPath, StandardCharsets.UTF_8.name())}"
}