Question

我最近从Java转向C＃和Mono for Android开发。我有一个ListView，我想可选地返回true或false，但在Mono中似乎没有这样做的选项。以下是一些代码段：

Java（我试图在Mono中重现）

ListView listview;
ArrayAdapter<String> adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    listview = (ListView)findViewById(R.id.listView1);
    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);

    for (int i = 0; i < 50; i++)
        adapter.add(Integer.toString(i));

    listview.setAdapter(adapter);
    listview.setOnTouchListener(listenerOnTouch);
}

private OnTouchListener listenerOnTouch = new OnTouchListener() {

    @Override
    public boolean onTouch(View arg0, MotionEvent arg1) {
        return false; // <---- This line doesn't exist in Mono
    }
};

等效单声道：

    ListView listview;
    ArrayAdapter<String> adapter;

    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);

        // Set our view from the "main" layout resource
        SetContentView (Resource.Layout.Main);

        listview = FindViewById(Resource.Id.listView1) as ListView;
        adapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1);

        for (int i = 0; i < 50; i++)
            adapter.Add (i.ToString());

        listview.Adapter = adapter;
        listview.Touch += ListenerOnTouch;
    }

    private void ListenerOnTouch(object sender, View.TouchEventArgs e)
    {
        // Delegate return type is void, so I can't return true/false
    }

从根本上说，我在这个例子中尝试做的是make，如果我向上或向下拖动列表视图，它会正常滚动，但如果我向左或向右拖动它会做其他事情。

Answer 1

我认为，可能是e.Handled需要根据您的要求设置true / false。

Handling Touch Event

触摸事件不能以单声道消耗

1 个答案: