Java 将 onItemClick 设置为自定义适配器 ListView

Set onItemClick to Custom adapter ListView

提问by Oluleye IRestekt Idowu

When I had problems trying to fix the position of my listView items to the desired intent when filtered, and got info I could override the problem using a custom adapter, I have done that but I do not know how to assign the clicks to each items, please check below code:

当我在过滤时尝试将我的 listView 项目的位置修复到所需的意图时遇到问题，并获得信息我可以使用自定义适配器覆盖问题，我已经做到了，但我不知道如何将点击分配给每个项目，请检查以下代码：

public class IndexPageActivity extends Activity { 
ListView listView;
EditText editTextB;

@Override
protected void onCreate(Bundle savfedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.indexpage);
    listView = (ListView) findViewById(R.id.pageList);
    editTextB = (EditText) findViewById(R.id.searchB);
    listView.setAdapter(new PagesAdapter(this));
    listView.setOnItemClickListener((OnItemClickListener) this);

}
}
class SingleRow {
String pagedata;
SingleRow(String pagedata){
    this.pagedata=pagedata;
}
}
class PagesAdapter extends BaseAdapter implements OnItemClickListener{
ArrayList<SingleRow> pagelist;
Context context;

PagesAdapter(Context c){
    context=c;
    pagelist = new ArrayList<SingleRow>();
    Resources res = c.getResources();
    String [] pagedatas = res.getStringArray(R.array.pages_data);
    for (int i=0;i<463;i++){
        pagelist.add(new SingleRow(pagedatas[i]));
    }
}
@Override
public int getCount() {
    // TODO Auto-generated method stub
    return pagelist.size();
}

@Override
public Object getItem(int i) {
    // TODO Auto-generated method stub
    return pagelist.get(i);
}

@Override
public long getItemId(int i) {
    // TODO Auto-generated method stub
    return i;
}

@Override
public View getView(int i, View view, ViewGroup viewG) {
    // TODO Auto-generated method stub
    LayoutInflater inflater=(LayoutInflater)             context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View row=inflater.inflate(R.layout.single_row,viewG,false);
    TextView pagetitle = (TextView) row.findViewById(R.id.textViewRow);

    SingleRow temp=pagelist.get(i);

    pagetitle.setText(temp.pagedata);
    return row;
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int i, long arg3) {
    // TODO Auto-generated method stub

}
}

I will appreciate any help given. Thank Yhu!

我将不胜感激所提供的任何帮助。谢谢宇！

EDIT

编辑

Will this work?

这会起作用吗？

 if (index == 0) {
    Intent i = new Intent(this, WebViewActivity.class);
    i.putExtra("keyHTML", "file:///android_asset/page1.html");
    startActivity(i);
} else if (index == 1) {
    Intent i = new Intent(this, WebViewActivity.class);
    i.putExtra("keyHTML", "file:///android_asset/page2.html");
    startActivity(i);

采纳答案by Coderji

Edited ALL

全部编辑

I just got what you need, I added a filter to your baseAdapterand then on text change within the editTextYou filter the listViewand then you go to the activity needed.

我刚刚得到了你需要的东西，我在你的过滤器中添加了一个过滤器baseAdapter，然后在editText你过滤器中更改文本listView，然后你去到所需的活动。

here is the full code but you need to bare in mind that I have changed the following:

这是完整的代码，但您需要记住我已经更改了以下内容：

• I changed the pageList to ArrayList instead of
• There is a bug in filtering that when I erase what I wrote in the EditTextit doesnt update the ListView, you need to figure out why.
• I changed the returned value of the function getItem(int i)from Object to String
• Within the onItemClickyou have to search for the name instead of the position.

• 我将 pageList 改为 ArrayList 而不是
• 过滤中有一个错误，当我删除我在其中写入的内容时，EditText它不会更新 ListView，您需要找出原因。
• 我将函数的返回值getItem(int i)从 Object 更改为 String
• 内onItemClick你要搜索的名称，而不是位置。

here is the code:

这是代码：

public class IndexPageActivity extends Activity implements OnItemClickListener{ 
ListView listView;
EditText editTextB;
PagesAdapter adapter1;

@Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
            listView = (ListView) findViewById(R.id.pageList);
            editTextB = (EditText) findViewById(R.id.searchB);
            adapter1 = new PagesAdapter(this);
            listView.setAdapter(adapter1);
            adapter1.notifyDataSetChanged();
            listView.setOnItemClickListener(this);

            editTextB.addTextChangedListener(new TextWatcher() {

                @Override
                public void onTextChanged(CharSequence cs, int arg1, int arg2,
                        int arg3) {
                    // When user changed the Text
                    IndexPageActivity.this.adapter1.getFilter().filter(cs.toString());
                    adapter1.notifyDataSetChanged();
                }

                @Override
                public void beforeTextChanged(CharSequence arg0, int arg1,
                        int arg2, int arg3) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void afterTextChanged(Editable arg0) {
                    // TODO Auto-generated method stub
                }
            });
    }


@Override
public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {
    // TODO Auto-generated method stub
    Intent i;
    String name = adapter1.getItem(position);
            Log.d("id", name);
    if (name.equals("Item1"))
    {
        i = new Intent(this, anActivity.class);
        startActivity(i);
    }
    else if (name.equals("Item2"))
    {
        i = new Intent(this, anActivity2.class);
        startActivity(i);
    }
}
}


class SingleRow {
String pagedata;
SingleRow(String pagedata){
    this.pagedata=pagedata;
}
}
class PagesAdapter extends BaseAdapter implements Filterable{
ArrayList<String> pagelist;
List<String> arrayList;
Context context;
String [] pagedatas;

PagesAdapter(Context c){
    context=c;
    pagelist = new ArrayList<String>();
    Resources res = c.getResources();
    pagedatas = res.getStringArray(R.array.pages_data);
    for (int i=0;i<463;i++){
        pagelist.add(pagedatas[i]);
    }
}
@Override
public int getCount() {
    // TODO Auto-generated method stub
    return pagelist.size();
}

@Override
public String getItem(int i) {
    // TODO Auto-generated method stub
    return pagelist.get(i);
}

@Override
public long getItemId(int i) {
    // TODO Auto-generated method stub
    return i;
}


@Override
public View getView(int i, View view, ViewGroup viewG) {
    // TODO Auto-generated method stub
    LayoutInflater inflater=(LayoutInflater)             context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View row=inflater.inflate(R.layout.single_row,viewG,false);
    TextView pagetitle = (TextView) row.findViewById(R.id.textViewRow);

    String temp=pagelist.get(i);

    pagetitle.setText(temp);
    return row;
}

public class filter_here extends Filter{

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        // TODO Auto-generated method stub

        FilterResults Result = new FilterResults();
        // if constraint is empty return the original names
        if(constraint.length() == 0 ){
            Result.values = pagelist;
            Result.count = pagelist.size();
            return Result;
        }

        ArrayList<String> Filtered_Names = new ArrayList<String>();
        String filterString = constraint.toString().toLowerCase();
        String filterableString;

        for(int i = 0; i<pagelist.size(); i++){
            filterableString = pagelist.get(i);
            if(filterableString.toLowerCase().contains(filterString)){
                Filtered_Names.add(filterableString);
            }
        }
        Result.values = Filtered_Names;
        Result.count = Filtered_Names.size();

        return Result;
    }

    @Override
    protected void publishResults(CharSequence constraint,FilterResults results) {
        // TODO Auto-generated method stub
        pagelist = (ArrayList<String>) results.values;
        notifyDataSetChanged();
    }

}

@Override
public Filter getFilter() {
    // TODO Auto-generated method stub

    return new filter_here();
}
}

回答by meda

Set your setOnItemClickListenerlikethis:

设置你的setOnItemClickListenerlike这个：

@Override
protected void onCreate(Bundle savfedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.indexpage);
    listView = (ListView) findViewById(R.id.pageList);
    editTextB = (EditText) findViewById(R.id.searchB);
    listView.setAdapter(new PagesAdapter(this));
    listView.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView<?> parent, View view,
            int position, long id) {
        //Your code here
        //int position is the index of the list item you clicked    
        //use it to manipulate the item for each click      
    }
});
}

回答by Devrim

Two different ways for it:

两种不同的方法：

1)If you want to use something like this at onCreate of your activity;

1）如果你想在你的活动的 onCreate 中使用这样的东西；

listView.setOnItemClickListener((OnItemClickListener) this);

listView.setOnItemClickListener((OnItemClickListener) this);

You should implement OnItemClickListenerto your activity:

您应该OnItemClickListener对您的活动实施：

IndexPageActivity extends Activity implements OnItemClickListener

and implement its onItemClick method at your activity. (also remove OnItemClickListenerinterface from your custom adapter)

并在您的活动中实现其 onItemClick 方法。（也OnItemClickListener从您的自定义适配器中删除接口）

2)You can simply use below without implementing OnItemClickListenerto any class:

2）您可以简单地在下面使用而无需实现OnItemClickListener任何类：

listView.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        // TODO: handle row clicks here
    }

I suggest 2nd option. That is easier.

我建议第二个选项。那更容易。

Edit:This not relevant to your problem but you should reuse your views/rows at listView. Change your getView method to:

编辑：这与您的问题无关，但您应该在 listView 重用您的视图/行。将您的 getView 方法更改为：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View view;
    if (convertView == null) {
        LayoutInflater inflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inflater.inflate(R.layout.single_row, parent, false);
    } else {
        view = convertView;
    }

    TextView pagetitle = (TextView) view.findViewById(R.id.textViewRow);

    SingleRow temp=pagelist.get(i);

    pagetitle.setText(temp.pagedata);
    return view;
}