将 android:requestLegacyExternalStorage="true" 添加到 Android Manifest 对我来说适用于 Android 29

Adding android:requestLegacyExternalStorage="true" to the Android Manifest worked for me with Android 29

<application
    android:name=".MyApplication"
    android:allowBackup="true"
    android:requestLegacyExternalStorage="true" ...