ディレクトリへのzipファイルの抽出

Question

エミュレータとXamarin Studio C＃Btを使用してディレクトリにzipファイルを展開しています。エラーの数を取得しています。数多くの方法を試しましたが、解決できませんでした。これはどのように解決できますか？ ：

string zipPath=("/storage/emulated/0/Download/file/file/file.epub"); 
    string extractPath = ("/storage/emulated/0/Download/file/file/temp"); 
    DateTime time = new DateTime(2016, 12, 30); 
    if (File.Exists(extractPath)) 
     File.SetLastWriteTime(extractPath, time); 
    ZipFile.ExtractToDirectory(zipPath, extractPath); 

しかし、私は次のようにエラーが発生します：

[MonoDroid] System.IO.IOException: Invalid parameter 
[MonoDroid] at System.IO.File.SetLastWriteTime (System.String path, System.DateTime lastWriteTime) [0x00030] in <500f590720b848ecadaddac3c375ddb5>:0 
[MonoDroid] at AD_Forms.AD..ctor() [0x00061] in <21d9786453cc4650b478317d331d91ab>:0 
[MonoDroid] at AD_Forms.App..ctor() [0x00006] in <21d9786453cc4650b478317d331d91ab>:0 
[MonoDroid] at AD_Forms.Droid.MainActivity.OnCreate (Android.OS.Bundle bundle) [0x00022] in <21d9786453cc4650b478317d331d91ab>:0 
[MonoDroid] at Android.Support.V4.App.FragmentActivity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x00011] in <27c17fe440cf491ba8255bcefade6e02>:0 
[MonoDroid] at (wrapper dynamic-method) System.Object:a118a7e9-2106-4f87-a55c-98f583aa9bd8 (intptr,intptr,intptr) 
[art] JNI RegisterNativeMethods: attempt to register 0 native methods for android.runtime.JavaProxyThrowable 
[AndroidRuntime] Shutting down VM 
[AndroidRuntime] FATAL EXCEPTION: main 
[AndroidRuntime] Process: com.companyname.ad_forms, PID: 1909 
[AndroidRuntime] java.lang.RuntimeException: java.lang.reflect.InvocationTargetException 
[AndroidRuntime] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
[AndroidRuntime] Caused by: java.lang.reflect.InvocationTargetException 
[AndroidRuntime] at java.lang.reflect.Method.invoke(Native Method) 
[AndroidRuntime] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
[AndroidRuntime] ... 1 more 
[AndroidRuntime] Caused by: android.runtime.JavaProxyThrowable: System.IO.IOException: Invalid parameter 
[AndroidRuntime] at System.IO.File.SetLastWriteTime (System.String path, System.DateTime lastWriteTime) [0x00030] in <500f590720b848ecadaddac3c375ddb5>:0 
[AndroidRuntime] at AD_Forms.AD..ctor() [0x00061] in <21d9786453cc4650b478317d331d91ab>:0 
[AndroidRuntime] at AD_Forms.App..ctor() [0x00006] in <21d9786453cc4650b478317d331d91ab>:0 
[AndroidRuntime] at AD_Forms.Droid.MainActivity.OnCreate (Android.OS.Bundle bundle) [0x00022] in <21d9786453cc4650b478317d331d91ab>:0 
[AndroidRuntime] at Android.Support.V4.App.FragmentActivity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x00011] in <27c17fe440cf491ba8255bcefade6e02>:0 
[AndroidRuntime] at (wrapper dynamic-method) System.Object:a118a7e9-2106-4f87-a55c-98f583aa9bd8 (intptr,intptr,intptr) 
[AndroidRuntime] at md595826e4c93c1bb9112307fcbc37b1beb.MainActivity.n_onCreate(Native Method) 
[AndroidRuntime] at md595826e4c93c1bb9112307fcbc37b1beb.MainActivity.onCreate(MainActivity.java:29) 
[AndroidRuntime] at android.app.Activity.performCreate(Activity.java:6237) 
[AndroidRuntime] at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
[AndroidRuntime] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
[AndroidRuntime] at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
[AndroidRuntime] at android.app.ActivityThread.-wrap11(ActivityThread.java) 
[AndroidRuntime] at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
[AndroidRuntime] at android.os.Handler.dispatchMessage(Handler.java:102) 
[AndroidRuntime] at android.os.Looper.loop(Looper.java:148) 
[AndroidRuntime] at android.app.ActivityThread.main(ActivityThread.java:5417) 

Answer 1

は、マニフェストファイルでアクセス許可を追加しますか？それはAndroidのバグが原因かもしれません

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 

これはbugzillaレポート言及： https://bugzilla.xamarin.com/show_bug.cgi?id=3029

てみても同じ問題を抱えているかどうかをチェックする代わりに、エミュレータの実際のデバイスでコードを実行します。