在listView

Question

我正在尝试让listView拥有一个与listView上每个项目对应的按钮。例如，如果我在列表中有产品，我想单击按钮并在单击按钮时显示该特定产品的信息。如何在适配器中为我的按钮添加一个on click侦听器，以便它根据listview中的每个项目工作？

这是我的自定义数组适配器。

public class MyAdapter extends BaseAdapter {
private Context mContext;
private List<Bean> mList;

public MyAdapter(Context context,List<Bean> list){
    mContext=context;
    mList=list;
}

@Override
public int getCount() {
    return mList.size();
}

@Override
public Object getItem(int position) {
    return mList.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    //use convertView recycle
    if(convertView==null){
        holder=new ViewHolder();
        convertView = LayoutInflater.from(mContext).inflate(R.layout.content_orders, parent, false);
        holder.textView= (TextView) convertView.findViewById(R.id.textView2);
        holder.imageView= (ImageView) convertView.findViewById(R.id.imageView2);
        convertView.setTag(holder);
    }else{
        holder = (ViewHolder) convertView.getTag();
    }

    //set text and url
    holder.textView.setText(mList.get(position).getText());
    Picasso.with(mContext).load(mList.get(position).getUrl()).resize(500,500).into(holder.imageView);

    return convertView;
}

class ViewHolder{
    TextView textView;
    ImageView imageView;

}
}

这是我的按钮

    <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Information"
    android:id="@+id/button5"
    android:layout_below="@+id/button4"
    android:layout_alignRight="@+id/button4"
    android:layout_alignEnd="@+id/button4"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

Answer 1

使用Textview和ImageView将按钮视图放入行布局。

    @Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    //use convertView recycle
    if(convertView==null){
        holder=new ViewHolder();
        convertView = LayoutInflater.from(mContext).inflate(R.layout.content_orders, parent, false);
        holder.textView= (TextView) convertView.findViewById(R.id.textView2);
        holder.imageView= (ImageView) convertView.findViewById(R.id.imageView2);
        convertView.setTag(holder);
    }else{
        holder = (ViewHolder) convertView.getTag();
    }
holder.clickableButton.setOnClickListener(new OnClickListener() {  

            @Override  
            public void onClick(View v) {  
               //Code goes here

            }  
        });  

    //set text and url
    holder.textView.setText(mList.get(position).getText());
    Picasso.with(mContext).load(mList.get(position).getUrl()).resize(500,500).into(holder.imageView);

    return convertView;
}

Answer 2

您可以将点击监听器添加到getView()方法中的按钮。然后你可以使用对'持有者＆＃39;的引用。自定义所需的列表项特定操作。

Answer 3

如果您提供的按钮xml代码位于content_orders布局中。然后代码应该是这样的

public class MyAdapter extends BaseAdapter {
private Context mContext;
private List<Bean> mList;

public MyAdapter(Context context,List<Bean> list){
    mContext=context;
    mList=list;
    }

@Override
public int getCount() {
    return mList.size();
}

@Override
public Object getItem(int position) {
    return mList.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    //use convertView recycle
    if(convertView==null){
    holder=new ViewHolder();
    convertView =   LayoutInflater.from(mContext).inflate(R.layout.content_orders, parent, false);
    holder.textView= (TextView) convertView.findViewById(R.id.textView2);
    holder.imageView= (ImageView) convertView.findViewById(R.id.imageView2);
holder.btn= (Button) convertView.findViewById(R.id.button5);
    convertView.setTag(holder);
}else{
    holder = (ViewHolder) convertView.getTag();
}

//set text and url
holder.textView.setText(mList.get(position).getText());
Picasso.with(mContext).load(mList.get(position).getUrl()).resize(500,500).into(holder.imageView);

holder.btn.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    // do something 
Toast.makeText(mContext,String.valueOf(position),Toast.LENGTH_SHORT).show();
    }
});

    return convertView;
}

class ViewHolder{
    TextView textView;
    ImageView imageView;
    Button btn;

}
}