在OnCreate之外使用UI對象方法

我是創建android應用程序的總新手。我可以在OnCreate方法中使用AXML中的對象，但是我不能在事件處理程序radioButton_Click中使用它們。我不想知道如何在事件處理程序radioButton_Click中使用它們。在OnCreate之外使用UI對象方法

protected override void OnCreate(Bundle bundle) 
    { 
     base.OnCreate(bundle); 
     SetContentView(Resource.Layout.Main); 
     RadioButton radioButton1 = FindViewById<RadioButton>(Resource.Id.radioButton1); 
     RadioButton radioButton2 = FindViewById<RadioButton>(Resource.Id.radioButton2); 
     radioButton1.Click += radioButton_Click; 
     radioButton2.Click += radioButton_Click; 
     //radioButton1 and radioButton2 are recognized here. 
    } 

    void radioButton_Click(object sender, EventArgs e) 
    { 
     //radioButton1 and radioButton2 are not recognized here. 
     //I want to know how to use IN THIS METHOD the objects loaded from the AXML 
     // in OnCreate (the two radio buttons) 
    }

來源

2014-08-27 myProfile

那麼，你可能必須創建這個變量作爲類成員變量。

RadioButton radioButton1; 
RadioButton radiobutton2; 
protected override void OnCreate(Bundle bundle) 
{ 
    base.OnCreate(bundle); 
    SetContentView(Resource.Layout.Main); 
    radioButton1 = FindViewById<RadioButton>(Resource.Id.radioButton1); 
    radioButton2 = FindViewById<RadioButton>(Resource.Id.radioButton2); 
    radioButton1.Click += radioButton_Click; 
    radioButton2.Click += radioButton_Click; 
    //radioButton1 and radioButton2 are recognized here. 
} 

void radioButton_Click(object sender, EventArgs e) 
{ 
    //radioButton1 and radioButton2 are not recognized here. 
    //I want to know how to use IN THIS METHOD the objects loaded from the AXML 
    // in OnCreate (the two radio buttons) 
}

來源

2014-08-27 23:24:36

在你的活動中，創建RadioButtons的字段（最好是私人的）。這將幫助您在全球範圍內使用它們。

通知通過FindViewById投下查找結果！

來源

2014-08-27 23:26:08

在OnCreate之外使用UI對象方法

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