在Android的列表视图按钮点击问题 [英] Listview button click issue in android
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问题描述
我用一个列表视图，有一个名为列表项订单按钮。我想显示嘀的形象，当用户presses按钮，隐藏在用户$ P $再次psses按钮。
我的问题是，当我在按钮上点击了第一项，选中第4,8项的形象也出现了。
这是onClickListener在适配器，
viewHolderItem.btnOrder.setOnClickListener（新OnClickListener（）{ @覆盖
公共无效的onClick（视图v）{
布尔isSelected = shoe.isSelected（）; 如果（isSelected）{
viewHolderItem.ivTick.setImageDrawable（NULL）;
isSelected = FALSE;
}其他{
viewHolderItem.ivTick.setImageDrawable（mContext.getResources（）getDrawable（R.drawable.tick））;
isSelected = TRUE;
} shoeList.get（位置）.setSelected（isSelected）;
obj.getAdapter（）notifyDataSetChanged（）。
}
}）;
什么是这个问题的原因是什么？
更新：这是我adapte getview方法
公共查看getView（最终诠释的立场，观点convertView，父母的ViewGroup）{ 最后ViewHolderItem viewHolderItem; 如果（convertView == NULL）{
LayoutInflater吹气=（LayoutInflater）mContext.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
convertView = inflater.inflate（R.layout.component_order_shoe_row，NULL）; viewHolderItem =新ViewHolderItem（）; viewHolderItem.tvName =（TextView中）convertView.findViewById（R.id.tv_component_order_shoe_name）;
viewHolderItem.tvPrice =（TextView中）convertView.findViewById（R.id.tv_component_order_shoe_price）;
viewHolderItem.tvDesc =（TextView中）convertView.findViewById（R.id.tv_component_order_shoe_description）;
viewHolderItem.ivPic =（ImageView的）convertView.findViewById（R.id.iv_component_order_shoe_pic）;
viewHolderItem.ivTick =（ImageView的）convertView.findViewById（R.id.iv_component_order_shoe_tick）;
viewHolderItem.spinnerSize =（微调）convertView.findViewById（R.id.spinner_component_order_shoe_size）;
viewHolderItem.etQty =（EditText上）convertView.findViewById（R.id.et_component_order_shoe_qty）;
viewHolderItem.btnOrder =（按钮）convertView.findViewById（R.id.btn_component_order_shoe_order）; convertView.setTag（viewHolderItem）; }其他{
viewHolderItem =（ViewHolderItem）convertView.getTag（）;
} 最后擦鞋鞋= shoeList.get（位置）;
viewHolderItem.tvName.setText（shoe.getShoeName（））; 字符串文本=将String.valueOf（shoe.getPrice（））;
INT integerPlaces = text.indexOf（'。'）;
INT小数位数= text.length（） - integerPlaces - 1;
如果（小数位数== 1）{
viewHolderItem.tvPrice.setText（RS+文字+0）;
}其他{
viewHolderItem.tvPrice.setText（RS+文字）;
}
viewHolderItem.tvDesc.setText（shoe.getDesc（））; BMP位图= AppControl.convertStringToBitmap（shoe.getImg（））;
viewHolderItem.ivPic.setImageBitmap（BMP）; 诠释最小= shoe.getSmallestSize（）;
诠释最大= shoe.getLargestSize（）; 整数[] = ARR getSizeArray（最小，最大）;
ArrayAdapter＆LT;整数GT;适配器=新ArrayAdapter＆LT;整数GT;（mContext，android.R.layout.simple_spinner_dropdown_item，ARR）;
viewHolderItem.spinnerSize.setAdapter（适配器）;
viewHolderItem.btnOrder.setOnClickListener（新OnClickListener（）{ @覆盖
公共无效的onClick（视图v）{
布尔isSelected = shoe.isSelected（）; 如果（isSelected）{
viewHolderItem.ivTick.setImageDrawable（NULL）;
isSelected = FALSE;
}其他{
viewHolderItem.ivTick.setImageDrawable（mContext.getResources（）getDrawable（R.drawable.tick））;
isSelected = TRUE;
} shoeList.get（位置）.setSelected（isSelected）;
obj.getAdapter（）notifyDataSetChanged（）。
}
}）; 返回convertView;
}
解决方案
您必须设置标记时首次所以创建的视图：
如果（convertView == NULL）{
LayoutInflater吹气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）; // code viewHolderItem.btnOrder =（的ImageButton）rowView.findViewById（R.id.imageButton）; viewHolderItem.btnOrder.setTag（viewHolder）; //设置标签的按钮
convertView.setTag（viewHolder）;
}其他{
viewHolderItem =（ViewHolder）convertView.getTag（）;
}
和获得它的点击监听器里：
viewHolderItem.btnOrder.setOnClickListener（新OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
viewHolderItem =（ViewHolder）v.getTag（）; //获取标签内的点击
布尔isSelected = shoe.isSelected（）; 如果（isSelected）{
viewHolderItem.ivTick.setImageDrawable（NULL）;
isSelected = FALSE;
}其他{
viewHolderItem.ivTick.setImageDrawable（mContext.getResources（）getDrawable（R.drawable.tick））;
isSelected = TRUE;
} shoeList.get（位置）.setSelected（isSelected）;
obj.getAdapter（）notifyDataSetChanged（）。
}
}）;
I'm using a list view and there is a button called "Order" in the list item. I want to show a "tick" image when the user presses the button and hide it when the user presses the button again.
My issue is when I clicked on the button on the first item, tick image of the 4th and 8th item is also appeared.
This is the onClickListener in the adapter,
viewHolderItem.btnOrder.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
boolean isSelected = shoe.isSelected();
if(isSelected){
viewHolderItem.ivTick.setImageDrawable(null);
isSelected = false;
}else{
viewHolderItem.ivTick.setImageDrawable(mContext.getResources().getDrawable(R.drawable.tick));
isSelected = true;
}
shoeList.get(position).setSelected(isSelected);
obj.getAdapter().notifyDataSetChanged();
}
});
What is the reason for this issue?
update: This is my adapte getview method
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolderItem viewHolderItem;
if(convertView == null){
LayoutInflater inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.component_order_shoe_row,null);
viewHolderItem = new ViewHolderItem();
viewHolderItem.tvName = (TextView)convertView.findViewById(R.id.tv_component_order_shoe_name);
viewHolderItem.tvPrice = (TextView)convertView.findViewById(R.id.tv_component_order_shoe_price);
viewHolderItem.tvDesc = (TextView)convertView.findViewById(R.id.tv_component_order_shoe_description);
viewHolderItem.ivPic = (ImageView)convertView.findViewById(R.id.iv_component_order_shoe_pic);
viewHolderItem.ivTick = (ImageView)convertView.findViewById(R.id.iv_component_order_shoe_tick);
viewHolderItem.spinnerSize = (Spinner)convertView.findViewById(R.id.spinner_component_order_shoe_size);
viewHolderItem.etQty = (EditText)convertView.findViewById(R.id.et_component_order_shoe_qty);
viewHolderItem.btnOrder = (Button)convertView.findViewById(R.id.btn_component_order_shoe_order);
convertView.setTag(viewHolderItem);
}else{
viewHolderItem = (ViewHolderItem)convertView.getTag();
}
final Shoe shoe = shoeList.get(position);
viewHolderItem.tvName.setText(shoe.getShoeName());
String text = String.valueOf(shoe.getPrice());
int integerPlaces = text.indexOf('.');
int decimalPlaces = text.length() - integerPlaces - 1;
if(decimalPlaces==1){
viewHolderItem.tvPrice.setText("Rs."+ text + "0");
}else{
viewHolderItem.tvPrice.setText("Rs."+ text);
}
viewHolderItem.tvDesc.setText(shoe.getDesc());
Bitmap bmp = AppControl.convertStringToBitmap(shoe.getImg());
viewHolderItem.ivPic.setImageBitmap(bmp);
int smallest = shoe.getSmallestSize();
int largest = shoe.getLargestSize();
Integer[] arr = getSizeArray(smallest,largest);
ArrayAdapter<Integer> adapter = new ArrayAdapter<Integer>(mContext, android.R.layout.simple_spinner_dropdown_item,arr);
viewHolderItem.spinnerSize.setAdapter(adapter);
viewHolderItem.btnOrder.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
boolean isSelected = shoe.isSelected();
if(isSelected){
viewHolderItem.ivTick.setImageDrawable(null);
isSelected = false;
}else{
viewHolderItem.ivTick.setImageDrawable(mContext.getResources().getDrawable(R.drawable.tick));
isSelected = true;
}
shoeList.get(position).setSelected(isSelected);
obj.getAdapter().notifyDataSetChanged();
}
});
return convertView;
}
解决方案
You have to set the tag when the view is created for the first time so:
if(convertView==null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//code
viewHolderItem.btnOrder= (ImageButton)rowView.findViewById(R.id.imageButton);
viewHolderItem.btnOrder.setTag(viewHolder); //set the tag for the button
convertView.setTag(viewHolder);
} else {
viewHolderItem = (ViewHolder) convertView.getTag();
}
And get it inside the click listener:
viewHolderItem.btnOrder.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
viewHolderItem = (ViewHolder) v.getTag(); //get the tag inside on click
boolean isSelected = shoe.isSelected();
if(isSelected){
viewHolderItem.ivTick.setImageDrawable(null);
isSelected = false;
}else{
viewHolderItem.ivTick.setImageDrawable(mContext.getResources().getDrawable(R.drawable.tick));
isSelected = true;
}
shoeList.get(position).setSelected(isSelected);
obj.getAdapter().notifyDataSetChanged();
}
});
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