Question

我收到此错误对象引用未设置为对象的实例 - Xamarin Studio 在这一行：

   this line -> button.Click += delegate {
                if( flag == 1)
                {
                    return;
                }
              try{
                int temp = Convert.ToInt16(test1.Text) ;
                temp = temp * 44100 *60;
                track = new IsochonicTone(temp);
                track.Frequency = Convert.ToDouble(Frequencytext.Text);
                track.Beat =  Convert.ToDouble(Beattext.Text);
                //button2.Enabled = true;
                flag = 1;
                ThreadPool.QueueUserWorkItem(o=> track.play());
                ThreadPool.QueueUserWorkItem(o=> Stopped());
            }
            catch( Exception e)
            {
                AlertDialog.Builder builder = new AlertDialog.Builder (this); 
                builder.SetMessage ("Please enter a number" + e.Message); 
                builder.Create().Show();
            } 
        };

这就是错误所说的：

＆＃34; System.NullReferenceException：对象引用未设置为对象的实例在NeuroEntrainment.MainActivity.OnCreate（Android.OS.Bundle）[0x00074]中的c：\ Users \ E574129 \ Documents \ Projects \ Neuro-Entrainment \ Neuro-Entrainment \ MainActivity.cs：58位于/Users/builder/data/lanes/monodroid-mlion-monodroid-4.14-series/a5d57087/source/monodroid/src中的Android.App.Activity.n_OnCreate_Landroid_os_Bundle_（intptr，intptr，intptr）[0x00011] /Mono.Android/platforms/android-14/src/generated/Android.App.Activity.cs:1944 at at（wrapper dynamic-method）object.79ba1211-8361-4fb9-a6b9-821c335e23d6（intptr，intptr，intptr）＆＃34;

但不是null ...并且在我将.wav文件添加到项目之前它正在工作... idk发生了什么：这是完整的功能

protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);
        flag = 0;
        SetContentView (Resource.Layout.Main);
        Button button = FindViewById<Button>(Resource.Id.myButton);
        Button button2 = FindViewById<Button>(Resource.Id.button1);
        EditText Frequencytext = FindViewById<EditText>(Resource.Id.Frequencytext);
        EditText Beattext = FindViewById<EditText>(Resource.Id.Beattext);
        EditText test1 = FindViewById<EditText>(Resource.Id.editText1);
        button.Click += delegate {
                if( flag == 1)
                {
                    return;
                }
                try{
                int temp = Convert.ToInt16(test1.Text) ;
                temp = temp * 44100 *60;
                track = new IsochonicTone(temp);
                track.Frequency = Convert.ToDouble(Frequencytext.Text);
                track.Beat =  Convert.ToDouble(Beattext.Text);
                flag = 1;
                ThreadPool.QueueUserWorkItem(o=> track.play());
                ThreadPool.QueueUserWorkItem(o=> Stopped());
                 }
            catch( Exception e)
            {
                AlertDialog.Builder builder = new AlertDialog.Builder (this); 
                builder.SetMessage ("Please enter a number" + e.Message); 
                builder.Create().Show();
            } 
        };
        button2.Click += delegate {
            if (track != null) {
                track.stop();
                track.Stop();
                track.Release();
                flag =0;
                track = null;
            }

            if (_player!= null)
            {
                _player.Stop();
                _player = null;
            }
        };
    }

看到它不是空的我该怎么解决这个问题？

对象引用未设置为对象的实例 - Xamarin Studio

0 个答案: