問題描述

我有一個帶有 ListView 的 Android 應用，列表中的每一行都有一個 TextView 和一個 Button.我想要做的是為 ListView 中的每個 Button 添加一個 OnClickListener，但我不知道如何獲得對每個 Button 的某種引用......誰能給我一個提示?

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?

這是綁定到 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>

我嘗試了類似的方法，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");
    }
}); 

推薦答案

不可能使用 SimpleCursorAdapter... 你必須創(chuàng)建自己的適配器.如果您不想編寫自定義適配器，至少嘗試使用新功能增強 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，你可以這樣做:

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

這篇關(guān)于Android:為 ListView 中的每個項目添加事件偵聽器的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！