空闲超时错误

Question

我的 MvvmCross Android 应用程序运行良好，在合理的时间内恢复正常后恢复正常，但如果时间跨度过多，则无法恢复良好。它不显示活动内容，而是显示一个带有标题的操作栏，没有任何菜单项内容。它会产生“Object reference null”类型的异常。

我知道这是 Activity 生命周期问题，但运气不好。

这是我的代码：

public class MyFragmentActivity : AppCompatActivity, IMvxEventSourceActivity
{

   protected override void OnCreate(Bundle bundle)

{

  base.OnCreate(bundle);
  CreateCalled.Raise(this, bundle);
  Mvx.Resolve();

}

    protected override void OnDestroy()
    {

        DestroyCalled.Raise(this);
        base.OnDestroy();
    }

    protected override void OnNewIntent(Intent intent)
    {
        base.OnNewIntent(intent);
        NewIntentCalled.Raise(this, intent);
    }

    protected override void OnResume()
    {
        base.OnResume();
        ResumeCalled.Raise(this);
    }

    protected override void OnPause()
    {
        PauseCalled.Raise(this);
        base.OnPause();
    }

    protected override void OnStart()
    {
        base.OnStart();
        StartCalled.Raise(this);
    }

    protected override void OnRestart()
    {
        base.OnRestart();
        RestartCalled.Raise(this);
    }

    protected override void OnStop()
    {
        StopCalled.Raise(this);
        base.OnStop();
    }

    public override void StartActivityForResult(Intent intent, int requestCode)
    {
        StartActivityForResultCalled.Raise(this, new MvxStartActivityForResultParameters(intent, requestCode));
        base.StartActivityForResult(intent, requestCode);
    }

    protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
    {
        ActivityResultCalled.Raise(this, new MvxActivityResultParameters(requestCode, resultCode, data));
        base.OnActivityResult(requestCode, resultCode, data);
    }

    protected override void OnSaveInstanceState(Bundle outState)
    {
        SaveInstanceStateCalled.Raise(this, outState);
        base.OnSaveInstanceState(outState);
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            DisposeCalled.Raise(this);
        }
        base.Dispose(disposing);
    }

    public event EventHandler DisposeCalled;
    public event EventHandler<MvxValueEventArgs<Bundle>> CreateWillBeCalled;
    public event EventHandler<MvxValueEventArgs<Bundle>> CreateCalled;
    public event EventHandler DestroyCalled;
    public event EventHandler<MvxValueEventArgs<Intent>> NewIntentCalled;
    public event EventHandler ResumeCalled;
    public event EventHandler PauseCalled;
    public event EventHandler StartCalled;
    public event EventHandler RestartCalled;
    public event EventHandler StopCalled;
    public event EventHandler<MvxValueEventArgs<Bundle>> SaveInstanceStateCalled;
    public event EventHandler<MvxValueEventArgs<MvxStartActivityForResultParameters>> StartActivityForResultCalled;
    public event EventHandler<MvxValueEventArgs<MvxActivityResultParameters>> ActivityResultCalled;

} 

请帮助解决这个问题。

谢谢

Answer 1

为什么要复制所有代码？ MvvmCross 内置了对 AppCompat 的支持：https://github.com/MvvmCross/MvvmCross-AndroidSupport/tree/master/Samples

你可以从 MvxAppCompatActivity 继承

public class LoginActivity : MvxAppCompatActivity<LoginViewModel>
{
    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);
        SetContentView ( Resource.Layout.activity_login );
    }
}

如果你想缓存片段，你甚至可以使用 MvxCachingFragmentCompatActivity