Android ListView item点击事件监听引用当前activity委托(delegate)方法

Question

我正在尝试 Android 开发，希望之前没有人问过这个问题，因为我不知道我的问题的正确 Android 术语。

我主要做iOS编程。我基本上想做的是创建一个 UITableView，它在每个单元格上都有一个点击事件，控制台应该只显示类似“水果”的内容，但我正在尝试使用 Android 执行此操作。

到目前为止，我为 onItemClickEventListener 准备了这个:

public class MainViewController extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main_view_controller);

        // Get list view from xml
        final ListView listView = (ListView) findViewById(R.id.listView);

        // Define data source to show in list view
        String[] items = new String[] {"Apple", "Banana", "Orange", "Mango", "Watermelon",
                "Apple", "Banana", "Orange", "Mango", "Watermelon",
                "Apple", "Banana", "Orange", "Mango", "Watermelon",
                "Apple", "Banana", "Orange", "Mango", "Watermelon",
                "Apple", "Banana", "Orange", "Mango", "Watermelon"};

        // ------------------------------------------------------------------------
        // Need to use Adapters to send data to list view
        //
        // First parameter: Context
        // Second parameter: Layout for the row
        // Third parameter: ID of the TextView to which data is written
        // Forth parameter: array of data
        // ------------------------------------------------------------------------

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, items);

        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                android.util.Log.i("Console Output: ", "Fruits!");



            }
        });

        ...

这行得通，但我想知道我是否可以做类似的事情:

// psuedocode
void onCreate()
{
    ...

    // ------------------------------------------------------------
    // this doesn't work when I tried it, said something about
    // cannot apply the onItemClick method on my ViewController
    // and can only be applied on AdapterViews
    //
    // I thought View Controllers are meant to handle these kind of
    // thing not Views ?
    // ------------------------------------------------------------
    listView.setOnItemClickListener(MainViewController.this);
}

// ----------------------------------------------------------------
// override the delegate method here instead of doing it 
// inline in the onCreate() method above
// ----------------------------------------------------------------
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

    android.util.Log.i("Console Output: ", "Fruits!");

});

我不确定内联添加点击监听器方法是否是一个好习惯，我正在努力避免疯狂的缩进 block 。

我说的有道理吗？ :D

Answer 1

匿名方法(您使用的前一种方法)更难调试

您应该在 Activity 中实现 OnItemClickListener 或创建一个实现 OnItemClickListener 的私有(private)类来处理点击