Question

大家好我有一个问题：

我创建了一个listview，带有搜索栏等。因此，当我点击某个项目（通过switch-case）时，所选的新活动将打开，并且没有任何问题。

你可以在这里看到代码：

Filtered list item opens the original list items' activity

当我使用搜索栏过滤列表视图时，问题就开始了，而不是打开所选活动（让我们说活动10），它会把我引回活动1，等等。

到目前为止我所知道的是，很可能CustomAdapter以某种方式混合了我的活动，并且不知道选择了哪个活动;因此，它让我回到了开始。

请伙计们，我正在努力解决这个问题超过一个月，但仍然没有希望。

任何帮助表示感谢。

Answer 1

在您的代码中，您根据listview的位置给出了click事件。例如：球员= {＆＃34; test1＆＃34;，＆＃34; test2＆＃34;，＆＃34; test3＆＃34;}

案例1：当没有搜索到任何内容时：第一个位置有玩家test1

案例2：用户搜索test2时。现在listview搜索test2并只找到一个这样的实例，搜索列表将只有一个播放器，它将位于第一个位置。由于您已根据位置给出了点击事件，因此第一行将始终显示为Barca

<强>更新

您需要更改以下代码

Group.java

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListView;
import java.util.ArrayList;


public class Group extends ListActivity {

ArrayList<Players> originalValues;
LayoutInflater inflater;
int noOfPlayers = 10;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.grouplist);
    final EditText searchBox = (EditText) findViewById(R.id.searchBox);
    ListView playersListView = (ListView) findViewById(android.R.id.list);

    inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    originalValues = new ArrayList<Players>();

    for (int i = 0; i < noOfPlayers; i++) {
        // here you initialise the class with your own data
        Players players = new Players(i, "name" + i, "team", R.drawable.ic_launcher);

        originalValues.add(players);
    }

    final CustomAdapter adapter = new CustomAdapter(this, R.layout.players, originalValues);

    playersListView.setAdapter(adapter);
    searchBox.addTextChangedListener(new TextWatcher() {


        public void onTextChanged(CharSequence s, int start, int before, int count) {
            String searchString = searchBox.getText().toString();
            int textLength = searchString.length();

            adapter.clearSearchResult();

            for (int i = 0; i < originalValues.size(); i++) {
                String playerName = originalValues.get(i).getName();
                if (textLength <= playerName.length()) {
                    // compare the String in EditText with Names in the
                    // ArrayList
                    if (searchString.equalsIgnoreCase(playerName.substring(0, textLength)))
                        adapter.addSeachResult(originalValues.get(i));
                }
            }

            adapter.notifyDataSetChanged();
        }

        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        public void afterTextChanged(Editable s) {

        }
    });


    playersListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            switch ((int) adapter.getItemId(position)) {
                case 0:
                        Intent newActivity = new    Intent(Group.this, Barca.class);
                        startActivity(newActivity);
                    break;
                case 1:
                    etc
            }
        }
    });
}

}

CustomAdapter.java

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;


class CustomAdapter extends BaseAdapter {

ArrayList<Players> searchResults;

ViewHolder viewHolder;

public CustomAdapter(Context context, int textViewResourceId, ArrayList<Players> results) {
    searchResults = new ArrayList<>(results);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if (convertView == null) {
        convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.players, null);
        viewHolder = new ViewHolder();

        viewHolder.photo = (ImageView) convertView.findViewById(R.id.photo);
        viewHolder.name = (TextView) convertView.findViewById(R.id.name);
        viewHolder.team = (TextView) convertView.findViewById(R.id.team);


        convertView.setTag(viewHolder);

    } else
        viewHolder = (ViewHolder) convertView.getTag();

    int photoId = (Integer) searchResults.get(position).getPicture();

    viewHolder.photo.setImageDrawable(parent.getContext().getResources().getDrawable(photoId));
    viewHolder.name.setText(searchResults.get(position).getName());
    viewHolder.team.setText(searchResults.get(position).getTeam());


    return convertView;

}

public void clearSearchResult() {
    searchResults.clear();
}

public void addSeachResult(Players result) {
    this.searchResults.add(result);
}

private class ViewHolder {
    ImageView photo;
    TextView name, team;

}

@Override
public int getCount() {
    return searchResults.size();
}

@Override
public Object getItem(int position) {
    return searchResults.get(position);
}

@Override
public long getItemId(int position) {
    return searchResults.get(position).getId();
}
}

名为Player.java的新类

public class Players {

public Players(int id,String name,String team,int picture){
    this.id = id;
    this.name = name;
    this.team = team;
    this.picture = picture;
}

private int id;
private String name;
private String team;
private int picture;

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getTeam() {
    return team;
}

public void setTeam(String team) {
    this.team = team;
}

public int getPicture() {
    return picture;
}

public void setPicture(int picture) {
    this.picture = picture;
}

public int getId() {
    return id;
}
}

搜索过滤listview后如何启动新意图？

1 个答案: