AccessDeniedException WatchService android studio

如何解决AccessDeniedException WatchService android studio

我正在尝试构建一个应用程序，该应用程序会在创建文件时发出通知。 我使用过 WatchService，但是当我尝试“注册”时出现以下错误：

W/System.err: java.nio.file.AccessDeniedException: /storage/emulated/0/Wow
W/System.err:     at sun.nio.fs.LinuxWatchService$Poller.implRegister(LinuxWatchService.java:275)
        at sun.nio.fs.AbstractPoller.processRequests(AbstractPoller.java:260)
        at sun.nio.fs.LinuxWatchService$Poller.run(LinuxWatchService.java:352)
        at java.lang.Thread.run(Thread.java:919)

我还在清单中添加了所有权限：

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <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:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyWatchservice"
        android:requestLegacyExternalStorage="true">

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name=".MainClass"
            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
            <intent-filter>
                <action android:name="android.accessibilityservice.AccessibilityService" />

            </intent-filter>
        </service>
    </application>

</manifest>

我在 MainClass.java 中的代码

                WatchService service = FileSystems.getDefault().newWatchService();
                Path path = Paths.get(Environment.getExternalStorageDirectory().getPath()+"/Wow");
                Log.e("test",path.toString());
    
                File dir5 = new File(String.valueOf(path));
                if(dir5.exists())
                    Log.e("test1","ye");
                else
                    Log.e("test1","nope");
    
    
                WatchKey key;
                path.register(service,StandardWatchEventKinds.ENTRY_CREATE);
                ...