Android 在“转换视图”上单击“侦听器”,使图像视图可见
我的列表视图包含一个Android 在“转换视图”上单击“侦听器”,使图像视图可见,android,listview,view,imageview,onclicklistener,Android,Listview,View,Imageview,Onclicklistener,我的列表视图包含一个文本视图和一个图像视图,第一个图像视图是不可见的,通过单击每个项目,它将可见这是我的适配器: public class ContentViewrAdaptor extends BaseAdapter implements Filterable { private List<String> originalData = null; private List<String> filteredData = null; private LayoutInfla
文本视图
和一个图像视图
,第一个图像视图是不可见的
,通过单击每个项目,它将可见
这是我的适配器:
public class ContentViewrAdaptor extends BaseAdapter implements Filterable {
private List<String> originalData = null;
private List<String> filteredData = null;
private LayoutInflater mInflater;
private Typeface regular;
private Context context;
private ItemFilter mFilter = new ItemFilter();
public ContentViewrAdaptor(Context context, List<String> data, Typeface regular) {
this.filteredData = data;
this.originalData = data;
this.regular = regular;
this.context = context;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return filteredData.size();
}
public Object getItem(int position) {
return filteredData.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.text_view, null);
holder = new ViewHolder();
holder.image = (ImageView) convertView.findViewById(R.id.iAccept);
holder.text = (TextView) convertView.findViewById(R.id.contentText);
holder.text.setTypeface(regular);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.image.setTag(position);
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context, (Integer) holder.image.getTag() + "", Toast.LENGTH_SHORT).show();
ViewHolder vh = (ViewHolder) v.getTag();
ImageView iv = vh.image;
if (iv.getVisibility() == View.VISIBLE) {
iv.setVisibility(View.INVISIBLE);
} else {
iv.setVisibility(View.VISIBLE);
}
}
});
if (filteredData.get(position).contains("font"))
holder.text.setText(Html.fromHtml(filteredData.get(position)));
else
holder.text.setText(filteredData.get(position));
return convertView;
}
static class ViewHolder {
ImageView image;
TextView text;
}
public Filter getFilter() {
return mFilter;
}
private class ItemFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
String filterString = constraint.toString().toLowerCase();
FilterResults results = new FilterResults();
final List<String> list = originalData;
int count = list.size();
final ArrayList<String> nlist = new ArrayList<String>(count);
String filterableString;
for (int i = 0; i < count; i++) {
filterableString = list.get(i);
if (filterableString.toLowerCase().contains(filterString)) {
filterableString = filterableString.replaceAll(filterString, "<font color='red'>" + filterString + "</font>");
nlist.add(filterableString);
}
}
results.values = nlist;
results.count = nlist.size();
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredData = (ArrayList<String>) results.values;
notifyDataSetChanged();
}
}
}
公共类ContentViewrAdaptor扩展BaseAdapter实现可过滤{
私有列表originalData=null;
私有列表过滤器数据=null;
私人停车场;
私人字体规则;
私人语境;
private-ItemFilter=new-ItemFilter();
public ContentViewrAdaptor(上下文、列表数据、常规字体){
this.filteredData=数据;
this.originalData=数据;
this.regular=regular;
this.context=上下文;
mInflater=LayoutInflater.from(上下文);
}
public int getCount(){
返回filteredData.size();
}
公共对象getItem(int位置){
返回filteredData.get(位置);
}
公共长getItemId(int位置){
返回位置;
}
公共视图getView(最终整数位置、视图转换视图、视图组父视图){
最终持票人;
if(convertView==null){
convertView=mInflater.flate(R.layout.text\u视图,空);
holder=新的ViewHolder();
holder.image=(ImageView)convertView.findViewById(R.id.iAccept);
holder.text=(TextView)convertView.findViewById(R.id.contentText);
holder.text.setTypeface(常规);
convertView.setTag(支架);
}否则{
holder=(ViewHolder)convertView.getTag();
}
支架.图像.设置标签(位置);
convertView.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
Toast.makeText(context,(Integer)holder.image.getTag()+“”,Toast.LENGTH_SHORT.show();
ViewHolder vh=(ViewHolder)v.getTag();
ImageView iv=vh图像;
if(iv.getVisibility()==View.VISIBLE){
iv.设置可见性(视图不可见);
}否则{
iv.设置可见性(视图可见);
}
}
});
if(filteredData.get(position).contains(“字体”))
holder.text.setText(Html.fromHtml(filteredData.get(position));
其他的
holder.text.setText(filteredData.get(position));
返回视图;
}
静态类视窗夹{
图像视图图像;
文本查看文本;
}
公共过滤器getFilter(){
返回过滤器;
}
私有类ItemFilter扩展了筛选器{
@凌驾
受保护的筛选器结果性能筛选(CharSequence约束){
String filterString=constraint.toString().toLowerCase();
FilterResults results=新的FilterResults();
最终列表=原始数据;
int count=list.size();
最终ArrayList NLList=新ArrayList(计数);
串滤器串;
for(int i=0;i
例如,当我单击第一个项目时,第四个项目也将可见,当列表滚动时会出现此问题
有什么问题?我怎样才能解决这个问题 问题在于,您的适配器在您滚动时重复使用视图,但您仅在调用onClicked()时设置视图的状态 如果要避免这种情况,一种解决方案是使用包含视图可见性状态的辅助列表 e、 g
ArrayList visiblePositions=new ArrayList();
公共视图getView(最终整数位置、视图转换视图、视图组父视图){
最终持票人;
if(convertView==null){
convertView=mInflater.flate(R.layout.text\u视图,空);
holder=新的ViewHolder();
holder.image=(ImageView)convertView.findViewById(R.id.iAccept);
holder.text=(TextView)convertView.findViewById(R.id.contentText);
holder.text.setTypeface(常规);
convertView.setTag(支架);
}
else holder=(ViewHolder)convertView.getTag();
支架.图像.设置标签(位置);
调整图像可见性(viewHolder,visiblePositions.contains(position));
convertView.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图v){
点击视图(支架、位置);
}
});
if(filteredata.get(position).contains(“font”))holder.text.setText(Html.fromHtml(filteredata.get(position));
else holder.text.setText(filteredData.get(position));
返回视图;
}
单击ViewHolder时的公共无效(ViewHolder ViewHolder,整数位置){
if(visiblePositions.contains(位置)){
调整图像可见性(viewHolder.image,false);
visibilePositions.移除(位置);
}
否则{
调整图像可见性(viewHolder.image,true);
可见位置。添加(位置);
}
}
public void adjustImageVisibility(ImageView ImageView,布尔可见){
如果(可见)imageView.setVisibility(视图.不可见);
else imageView.setVisibility(View.VISIBLE);
}
在构建要显示的视图时,支持单击项的位置,并让适配器的getView()方法使用该位置,这应该对您有用
注意:如果由于某种原因列表的顺序发生变化,此解决方案可能会失败
更好的方法是创建一个对象,该对象既包含要显示的字符串,又包含一个用于可见性的布尔值,然后让对象自己处理它
但是这个
ArrayList<Integer> visiblePositions = new ArrayList<Integer>();
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.text_view, null);
holder = new ViewHolder();
holder.image = (ImageView) convertView.findViewById(R.id.iAccept);
holder.text = (TextView) convertView.findViewById(R.id.contentText);
holder.text.setTypeface(regular);
convertView.setTag(holder);
}
else holder = (ViewHolder) convertView.getTag();
holder.image.setTag(position);
adjustImageVisibility(viewHolder, visiblePositions.contains(position));
convertView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
onViewClicked(holder, position);
}
});
if (filteredData.get(position).contains("font")) holder.text.setText(Html.fromHtml(filteredData.get(position)));
else holder.text.setText(filteredData.get(position));
return convertView;
}
public void onViewClicked(ViewHolder viewHolder, Integer position){
if (visiblePositions.contains(position)) {
adjustImageVisibility(viewHolder.image, false);
visibilePositions.remove(position);
}
else {
adjustImageVisibility(viewHolder.image, true);
visiblePositions.add(position);
}
}
public void adjustImageVisibility(ImageView imageView, boolean visible){
if(visible) imageView.setVisibility(View.INVISIBLE);
else imageView.setVisibility(View.VISIBLE);
}
private boolean[] mImageStates;
public ContentViewrAdaptor(Context context, List<String> data, Typeface regular) {
...
mImageStates = new boolean[getCount()];
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.text_view, null);
holder = new ViewHolder();
holder.image = (ImageView) convertView.findViewById(R.id.iAccept);
holder.text = (TextView) convertView.findViewById(R.id.contentText);
holder.text.setTypeface(regular);
convertView.setTag(holder);
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context, (Integer) holder.image.getTag() + "", Toast.LENGTH_SHORT).show();
ImageView imageView = holder.image;
int position = Integer.parseInt(imageView.getTag().toString());
if (mImageStates[position]) {
imageView.setVisibility(View.INVISIBLE);
mImageStates[position] = false;
} else {
imageView.setVisibility(View.VISIBLE);
mImageStates[position] = true;
}
}
});
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.image.setTag(position);
if (mImageStates[position]) {
holder.image.setVisibility(View.INVISIBLE);
} else {
holder.image.setVisibility(View.VISIBLE);
}
if (filteredData.get(position).contains("font")) {
holder.text.setText(Html.fromHtml(filteredData.get(position)));
} else {
holder.text.setText(filteredData.get(position));
}
return convertView;
}