问题描述

我有一个带有 ListView 的 Android 应用，列表中的每一行都有一个 TextView 和一个 Button.我想要做的是为 ListView 中的每个 Button 添加一个 OnClickListener，但我不知道如何获得对每个 Button 的某种引用......谁能给我一个提示?

I have an Android app with a ListView, and each row in the list has a TextView and a Button. What I want to do is add an OnClickListener to each Button in the ListView, but I can't figure out how to get some sort of reference to every Button... Can anyone please give me a hint?

这是绑定到 ListAdapter 的 XML:

Here's my XML that's bound to the ListAdapter:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView 
    android:id="@+id/row_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:textSize="18sp">
</TextView>
<Button
    android:id="@+id/row_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true" />
</RelativeLayout>

我尝试了类似的方法，但它不起作用:

And I tried something like this, but it doesn't work:

SimpleCursorAdapter rows = new SimpleCursorAdapter(this, R.layout.row_layout, cursor, from, to);
setListAdapter(rows);
Button button = (Button) getListAdapter().getView(0, null, getListAdapter()).findViewById(R.id.row_button);
button.setOnClickListener(new View.OnClickListener() {
    @Override public void onClick(View v) {
        Log.i(TAG, "clicked");
    }
}); 

推荐答案

不可能使用 SimpleCursorAdapter... 你必须创建自己的适配器.如果您不想编写自定义适配器，至少尝试使用新功能增强 SimpleCursorAdapter.例如:

It's not possible using SimpleCursorAdapter... you will have to create your own adapter. If you don't want to write a custom Adapter, at least try to enhance the SimpleCursorAdapter with new capabilities. For instance:

public class YourAdapter extends SimpleCursorAdapter{

    public YourAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
        super(context, layout, c, from, to);
    }

    public View getView(int position, View convertView, ViewGroup parent){
        View view = super.getView(position, convertView, parent);
        Button button = (Button)view.findViewById(R.id.row_button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override public void onClick(View v) {
                Log.i(TAG, "clicked");
            }
        }); 
        return view;
    }
}

那么，你可以这样做:

SimpleCursorAdapter rows = new YourAdapter(this, R.layout.row_layout, cursor, from, to);
setListAdapter(rows);

这篇关于Android:为 ListView 中的每个项目添加事件侦听器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！