Java ListView OnClick特定项不工作
我有一个ListViewAdapter,我正在尝试设置它,但是它不工作,这是我第三次尝试以不同的方式使它工作,但仍然没有运气,我将发布我的整个ListViewAdapter代码Java ListView OnClick特定项不工作,java,android,Java,Android,我有一个ListViewAdapter,我正在尝试设置它,但是它不工作,这是我第三次尝试以不同的方式使它工作,但仍然没有运气,我将发布我的整个ListViewAdapter代码 public class ListViewAdapter extends BaseAdapter { Context mContext; String [] productTitleArray; LayoutInflater inflater; private List<
public class ListViewAdapter extends BaseAdapter {
Context mContext;
String [] productTitleArray;
LayoutInflater inflater;
private List<ClassproductList> classproductlist = null;
private ArrayList<ClassproductList> arraylist;
public ListViewAdapter(Context context, List<ClassproductList> classproductlist) {
mContext = context;
this.classproductlist = classproductlist;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<ClassproductList>();
this.arraylist.addAll(classproductlist);
}
public class ViewHolder {
TextView title;
TextView description;
ImageView photo;
}
@Override
public int getCount() {
return classproductlist.size();
}
@Override
public ClassproductList getItem(int position) {
return classproductlist.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.list_view_single_row, null);
holder.title = (TextView) view.findViewById(R.id.textLarge);
holder.description = (TextView) view.findViewById(R.id.textSmall);
holder.photo= (ImageView) view.findViewById(R.id.imageThumb);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
holder.title.setText(classproductlist.get(position).getTitle());
holder.description.setText(classproductlist.get(position).getDescription());
holder.photo.setImageResource(classproductlist.get(position).getImage());
Resources res = mContext.getResources();
productTitleArray = res.getStringArray(R.array.titles_product);
ListViewAdapter myData = new ListViewAdapter(mContext, R.layout.list_view, myData);
ListView listView = (ListView) findViewById(R.id.listview1);
listView.setAdapter(myData);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position) {
case 1:
Log.d("Msg", "Found Product 1");
break;
case 2:
Log.d("Msg", "Found Product 2");
break;
default:
}
}
});
return view;
}
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
classproductlist.clear();
if (charText.length() == 0) {
classproductlist.addAll(arraylist);
}
else
{
for (ClassproductList wp : arraylist)
{
if (wp.getTitle().toLowerCase(Locale.getDefault()).contains(charText))
{
classproduclist.add(wp);
classproductlist.add(wp);
}
}
}
notifyDataSetChanged();
}
}
公共类ListViewAdapter扩展了BaseAdapter{
语境;
字符串[]productTitleArray;
充气机;
私有列表classproductlist=null;
私有ArrayList ArrayList;
公共ListViewAdapter(上下文上下文,列表classproductlist){
mContext=上下文;
this.classproductlist=classproductlist;
充气器=从(mContext)开始的充气器;
this.arraylist=新的arraylist();
this.arraylist.addAll(classproductlist);
}
公共类视图持有者{
文本视图标题;
文本视图描述;
ImageView照片;
}
@凌驾
public int getCount(){
返回classproductlist.size();
}
@凌驾
公共类ProductList getItem(int位置){
返回classproductlist.get(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
公共视图getView(最终整数位置、视图视图、视图组父视图){
最终持票人;
如果(视图==null){
holder=新的ViewHolder();
视图=充气机。充气(R.layout.list\u view\u single\u row,null);
holder.title=(TextView)view.findViewById(R.id.textLarge);
holder.description=(TextView)view.findViewById(R.id.textSmall);
holder.photo=(ImageView)view.findViewById(R.id.imageThumb);
视图.设置标签(支架);
}否则{
holder=(ViewHolder)view.getTag();
}
holder.title.setText(classproductlist.get(position.getTitle());
holder.description.setText(classproductlist.get(position.getDescription());
holder.photo.setImageResource(classproductlist.get(position.getImage());
Resources res=mContext.getResources();
productTitleArray=res.getStringArray(R.array.titles\u product);
ListViewAdapter myData=新的ListViewAdapter(mContext,R.layout.list\u视图,myData);
ListView ListView=(ListView)findViewById(R.id.listview1);
setAdapter(myData);
setOnItemClickListener(新的OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView父对象、视图、整型位置、长id){
开关(位置){
案例1:
Log.d(“味精”,“发现产品1”);
打破
案例2:
Log.d(“味精”,“发现产品2”);
打破
违约:
}
}
});
返回视图;
}
公共空过滤器(字符串图表文本){
charText=charText.toLowerCase(Locale.getDefault());
classproductlist.clear();
如果(ChartText.length()==0){
classproductlist.addAll(arraylist);
}
其他的
{
对于(ClassproductList wp:arraylist)
{
if(wp.getTitle().toLowerCase(Locale.getDefault()).contains(charText))
{
classproduclist.add(wp);
classproductlist.add(wp);
}
}
}
notifyDataSetChanged();
}
}
此代码中存在问题,但不知道如何解决此问题:
ListViewAdapter myData = new ListViewAdapter(mContext, R.layout.list_view, myData);
ListView listView = (ListView) findViewById(R.id.listview1);
listView.setAdapter(myData);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position) {
case 1:
Log.d("Msg", "Found Product 1");
break;
case 2:
Log.d("Msg", "Found Product 2");
break;
default:
}
}
});
ListViewAdapter myData=新的ListViewAdapter(mContext,R.layout.list\u视图,myData);
ListView ListView=(ListView)findViewById(R.id.listview1);
setAdapter(myData);
setOnItemClickListener(新的OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView父对象、视图、整型位置、长id){
开关(位置){
案例1:
Log.d(“味精”,“发现产品1”);
打破
案例2:
Log.d(“味精”,“发现产品2”);
打破
违约:
}
}
});
您到底遇到了什么错误?仅仅说“它不工作”并不能给任何人提供更多的信息。您缺少列表视图和列表适配器如何工作的基本知识。您在getView中设置list Adpter:(.请阅读文档您使用的是ListFragment类还是ListActivity;或者仅仅是一个activity?您能提供列表存在于哪个类中的一些上下文吗?)@Mike B-显然,在查看代码时,我的listview出了问题-Libin-请对此提出建议,我正在慢慢阅读教程,但同时我需要提升我的项目,你能编辑我的代码吗,我会比较一下,看看做了哪些更改?