Question

我想在relativelayout上设置一个OnTouchListener，它由arrayadapter创建并发送到listview。但是，必须将由OnTouchListener触发的代码写入设置适配器的活动中。是否可以将侦听器设置为适配器中的视图，并在活动中定义（或编码）它？

我的适配器：

data-parsley-trigger="focusout"

TouchInterface：

public class MessageAdapter extends ArrayAdapter<FriendlyMessage> {

TouchInterface touchInterface;
protected AlphaAnimation fadeOut = new AlphaAnimation( 1.0f , 0.0f );
protected AlphaAnimation fadeIn = new AlphaAnimation( 0.0f , 1.0f );
ViewHolder viewHolder = new ViewHolder();

private static class ViewHolder {
    TextView messageText;
    TextView nameText;
    TextView timeText;
    ImageView imageView;
    RelativeLayout relativeLayout;
    int position;
}

public MessageAdapter(Context context, int resource, List<FriendlyMessage> objects) {
    super(context, resource, objects);
}

public void setOnTouchListener(View.OnTouchListener touchListener){
    this.touchInterface = (TouchInterface) touchListener;
    viewHolder.relativeLayout.setOnTouchListener(touchListener);
}

@Override
public View getView(final int position, View convertView, final ViewGroup parent) {

    FriendlyMessage message = getItem(position);

    if (message.getPhotoUrl() != null){
        if (Objects.equals(message.getKey(), String.valueOf(Build.SERIAL))){
            convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.item_message_image_right, null);
            viewHolder.relativeLayout = (RelativeLayout) convertView.findViewById(R.id.rel);
            viewHolder.imageView = (ImageView) convertView.findViewById(R.id.photoImageViewR);
            viewHolder.nameText = (TextView) convertView.findViewById(R.id.nameTextView);
            viewHolder.timeText = (TextView) convertView.findViewById(R.id.tvtimeimg);
            Picasso.with(viewHolder.imageView.getContext())
                    .load(message.getPhotoUrl())
                    .into(viewHolder.imageView);
            convertView.setTag(viewHolder);
        }
        else if (!Objects.equals(message.getKey(), String.valueOf(Build.SERIAL))){
            convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.item_message_image_left, null);
            viewHolder.relativeLayout = (RelativeLayout) convertView.findViewById(R.id.rel);
            viewHolder.imageView = (ImageView) convertView.findViewById(R.id.photoImageViewL);
            viewHolder.nameText = (TextView) convertView.findViewById(R.id.nameTextView);
            viewHolder.timeText = (TextView) convertView.findViewById(R.id.tvtimeimg);
            Picasso.with(viewHolder.imageView.getContext())
                    .load(message.getPhotoUrl())
                    .into(viewHolder.imageView);
            convertView.setTag(viewHolder);
        }
    }
    else if (message.getPhotoUrl() == null){
        if (Objects.equals(message.getKey(), String.valueOf(Build.SERIAL))) {
            convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.item_message_text_right, null);
            viewHolder.relativeLayout = (RelativeLayout) convertView.findViewById(R.id.rel);
            viewHolder.messageText = (TextView) convertView.findViewById(R.id.messageTextView);
            viewHolder.nameText = (TextView) convertView.findViewById(R.id.nameTextView);
            viewHolder.timeText = (TextView) convertView.findViewById(R.id.tvtime);
            viewHolder.messageText.setText(message.getText());
            convertView.setTag(viewHolder);

        } else if (!Objects.equals(message.getKey(), String.valueOf(Build.SERIAL))) {
            convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.item_message_text_left, null);
            viewHolder.relativeLayout = (RelativeLayout) convertView.findViewById(R.id.rel);
            viewHolder.messageText = (TextView) convertView.findViewById(R.id.messageTextView);
            viewHolder.nameText = (TextView) convertView.findViewById(R.id.nameTextView);
            viewHolder.timeText = (TextView) convertView.findViewById(R.id.tvtime);
            viewHolder.messageText.setText(message.getText());
            convertView.setTag(viewHolder);
        }
    }
//some other code here
    return convertView;
}}

我的活动，我想调用监听器（它是一个很长的代码，所以我删除了一些现在不重要的部分）：

public interface TouchInterface {
void touch(View.OnTouchListener onTouchListener);}

Answer 1

如果我理解你正确的问题，你想在列表元素上设置一个点击监听器来执行父活动的方法（我猜你会传递相应的参数）。如果我得到了正确的结果，你应该在父活动类型的Adapter类中定义一个变量。像

这样的东西

private MessageActivity activity;

然后在你的Adapter构造函数

中

activity = (MessageActivity) context;

然后，当您在视图上设置点击监听器时，您应该执行类似

的操作

view.setOnClickListener(new View.OnClickListener() {
         public void onClick(View v) {
             // Perform action on click
             activity.YourOnTouchMethodImplementation();
         }
     });

是否可以在适配器中设置OnTouchListener并从设置适配器的活动中调用它？

1 个答案: