在Activity的Oncreate方法中加入

  RequestWindowFeature(WindowFeatures.NoTitle);

， 在SetContentView之前。

 public class PhysicsActivity : Activity

    {

        protected override void OnCreate( Bundle savedInstanceState)

        {

            base.OnCreate(savedInstanceState);

            RequestWindowFeature( WindowFeatures.NoTitle);

            // Create your application here

            SetContentView( Resource.Layout .Physics);

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