Question

我在将onClickListener添加到自定义列表适配器时遇到问题，代码如下。 onListItemClick的实现方式与使用常规listView的方法相同，但是无论何时单击一个项目都没有任何反应，除了“unregisterListener .....”出现在LogCat中。

非常感谢任何帮助。

MyListAdapter.java

import android.app.Activity;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MyListAdapter extends ArrayAdapter<String> {
    private final Activity context;
    private final String[] names;

    static class ViewHolder {
        public Button button;
        public ImageButton imageButton;
        public ImageButton imageButton2;
    }

    public MyListAdapter(Activity context, String[] names) {
        super(context, R.layout.custom_list_item, names);
        this.context = context;
        this.names = names;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View rowView = convertView;
        if (rowView == null) {
            LayoutInflater inflater = context.getLayoutInflater();
            rowView = inflater.inflate(R.layout.custom_list_item, null);
            ViewHolder viewHolder = new ViewHolder();
            viewHolder.button = (Button) rowView.findViewById(R.id.txtTitle);
            viewHolder.imageButton = (ImageButton) rowView.findViewById(R.id.moreInfo);
            viewHolder.imageButton2 = (ImageButton) rowView.findViewById(R.id.imgArrow);
            rowView.setTag(viewHolder);
        }

        ViewHolder holder = (ViewHolder) rowView.getTag();
        String s = names[position];
        holder.button.setText(s);
        holder.imageButton.setImageResource(R.drawable.more);
        holder.imageButton2.setImageResource(R.drawable.arrow);

        return rowView;
    }
}

customer_list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    android:padding="10dp" >

    <ImageButton
        android:id="@+id/moreInfo"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_marginBottom="5dp"
        android:layout_marginRight="15dp"
        android:layout_marginTop="5dp"
        android:background="@android:color/transparent"
        android:contentDescription="@string/more_info"
        android:gravity="center_vertical"
        android:src="@drawable/more" />

    <Button
        android:id="@+id/txtTitle"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="5dp"
        android:layout_weight="1"
        android:background="@android:color/transparent"
        android:gravity="center_vertical"
        android:textColor="#000000"
        android:textIsSelectable="true"
        android:textSize="22sp"
        android:textStyle="bold" />

    <ImageButton
        android:id="@+id/imgArrow"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_marginBottom="5dp"
        android:layout_marginRight="15dp"
        android:layout_marginTop="5dp"
        android:background="@android:color/transparent"
        android:contentDescription="@string/select_trick"
        android:gravity="center_vertical"
        android:src="@drawable/arrow" />

</LinearLayout>

Answer 1

要在箭头按钮上添加onClickListener，请像这样编写新的类点击器

public class clicker implements View.OnClickListener
{
    int position=0;

    /*------- Constructor for storing position on which click event triggered  ----------*/
    public clicker(int pos)
    {
        position=pos;  //this will be position of selected item in listview.
    }

    public void onClick(View v)
    {
        //Do your operation
    }

}

在getView方法中调用此Clicker，

 holder.imageButton2.setOnClickListener(new clicker(position));

对moreinfo按钮使用相同的步骤

Answer 2

为什么不在OnClickListener内设置getView()？

public View getView(int position, View convertView, ViewGroup parent) {
    ...

    viewHolder.imageButton.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
          }
    };
    viewHolder.imageButton2.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
          }
    };
}

Answer 3

您可以添加

android:descendantFocusability="blocksDescendants"

在列表行布局的父线性布局中，您的列表行将被点击

onClickListener用于自定义ListView

3 个答案: