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问题描述
我用下面的code，显示的标签列表现在，当我选择一个刻度线所选择的项目之前显示的项目。
和我移动到下一个活动。现在的问题是，当我来到这个活动再次使用后退按钮和滚动的ListView的刻度标记显示多个标签，而不是单一的一个我选中了。
任何一个指导我什么错误，我在这里干什么？
ImageView的selectedTickImageView;
getview {
如果（convertView == NULL）{
convertView = mInflater.inflate（R.layout.row_tags_archives，NULL）;
持有人=新ViewHolder（）;
holder.tickImageView =（ImageView的）convertView.findViewById（R.id.tick_image_view）;
holder.titletextView =（TextView中）convertView.findViewById（R.id.tv_tags_archives）;
holder.tickImageView.setTag（位置）;
convertView.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（查看paramView）{
如果（selectedTickImageView！= NULL）{
selectedTickImageView.setVisibility（View.GONE）;
}
ImageView的tickImageView =（ImageView的）paramView.findViewWithTag（位置）;
tickImageView.setVisibility（View.VISIBLE）;
selectedTickImageView = tickImageView;
S =标签[定位];
S = S.replace（， - ）;
S = S.toLowerCase（）;
意向意图=新的意图（H pressTagsorUpdatesActivity.this，H pressSummariesActivity.class）;
startActivity（意向）;
}}）;
convertView.setTag（保持器）;
} 其他 {
支架=（ViewHolder）convertView.getTag（）;
}
解决方案
一类标签+选择的领域将是解决这一问题的更有效的方式，但我已经使用布尔的全球选定阵列跟踪选定的项目。
如果（convertView == NULL）{
//私人语境_context =;
LayoutInflater mInflater = LayoutInflater.from（H pressTagsorUpdatesActivity.this）;
convertView = mInflater.inflate（R.layout.row_tags_archives，NULL）;
持有人=新ViewHolder（）;
holder.tickImageView =（ImageView的）convertView.findViewById（R.id.tick_image_view）;
holder.tickImageView.setTag（位置）;
holder.titletextView =（TextView中）convertView.findViewById（R.id.tv_tags_archives）;
convertView.setTag（保持器）;
} 其他 {
支架=（ViewHolder）convertView.getTag（）;
}
如果（选择[位置] ==真）
{
holder.tickImageView.setVisibility（View.VISIBLE）;
}其他
{
holder.tickImageView.setVisibility（View.GONE）;
}
convertView.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（查看paramView）{
ImageView的tickImageView =（ImageView的）paramView.findViewWithTag（位置）;
tickImageView.setVisibility（View.VISIBLE）;
选择[位置] =真;
S =标签[定位];
S = S.replace（， - ）;
S = S.toLowerCase（）;
意向意图=新的意图（H pressTagsorUpdatesActivity.this，H pressSummariesActivity.class）;
startActivity（意向）;
}}）;
i am using following code to display list of tags now when i select any item a tick mark is displayed before that selected item.
and i move to next activity. now problem is when i come to this activity again using back button and scroll on that listview tick marks are displayed before many tags instead of single one i selected.
any one guide me what mistake am i doing here?
ImageView selectedTickImageView;
getview{
if (convertView == null) {
convertView = mInflater.inflate(R.layout.row_tags_archives, null);
holder = new ViewHolder();
holder.tickImageView= (ImageView)convertView.findViewById(R.id.tick_image_view);
holder.titletextView = ( TextView )convertView.findViewById(R.id.tv_tags_archives);
holder.tickImageView.setTag(position);
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View paramView) {
if(selectedTickImageView != null){
selectedTickImageView.setVisibility(View.GONE);
}
ImageView tickImageView = (ImageView)paramView.findViewWithTag(position);
tickImageView.setVisibility(View.VISIBLE);
selectedTickImageView =tickImageView;
S=tags[position];
S=S.replace(" ", "-");
S=S.toLowerCase();
Intent intent = new Intent(HPressTagsorUpdatesActivity.this ,HPressSummariesActivity.class);
startActivity(intent);
}});
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
解决方案
a class with tag + selected fields would be more efficient way to solve this problem but i have used a global selected array of boolean to keep track of selected item.
if (convertView == null) {
//private Context _context = ;
LayoutInflater mInflater = LayoutInflater.from(HPressTagsorUpdatesActivity.this);
convertView = mInflater.inflate(R.layout.row_tags_archives, null);
holder = new ViewHolder();
holder.tickImageView= (ImageView)convertView.findViewById(R.id.tick_image_view);
holder.tickImageView.setTag(position);
holder.titletextView = ( TextView )convertView.findViewById(R.id.tv_tags_archives);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if(selected[position] == true)
{
holder.tickImageView.setVisibility(View.VISIBLE);
}else
{
holder.tickImageView.setVisibility(View.GONE);
}
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View paramView) {
ImageView tickImageView = (ImageView)paramView.findViewWithTag(position);
tickImageView.setVisibility(View.VISIBLE);
selected[position] = true;
S=tags[position];
S=S.replace(" ", "-");
S=S.toLowerCase();
Intent intent = new Intent(HPressTagsorUpdatesActivity.this ,HPressSummariesActivity.class);
startActivity(intent);
}});
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