java - 在ListView上依次显示用户信息

Question

问题陈述:-

在下面的代码中，我得到了用户列表，我当前在谷歌地图上显示了该列表，这对我来说工作得很好。而且我还需要在无法正常工作的 ListView 上显示它们。

所以目前我在响应中有两个用户的列表。如果我尝试在 for 循环中打印它们，我可以看到两个用户都被正确打印。但是，当我尝试将它们添加到我的 ListView 中时，我看到 只有一个用户 在 ListView 上显示两次？但我应该在 ListView 上依次看到两个用户。

@Override
protected void onPostExecute(ArrayList<User> response) {

    for(User user : response){

        System.out.println("User:- " +user.getFirstName());

// Something wrong I am doing in below line
        adapter=new LazyAdapter(ThesisProjectAndroid.this, mStrings, user);

        if(user.getGender()==1) {
            Drawable marker=getResources().getDrawable(R.drawable.current_user);
            int markerWidth = marker.getIntrinsicWidth();
            int markerHeight = marker.getIntrinsicHeight();
            marker.setBounds(0, 0, markerHeight, markerWidth);


            myItemizedOverlay = new MyItemizedOverlay(marker);
            mapView.getOverlays().add(myItemizedOverlay);

            GeoPoint myPoint1 = new GeoPoint((int) (user.getLatitude()*1000000), (int) (user.getLongitude()*1000000));
            myItemizedOverlay.addItem(myPoint1, "myPoint1", "myPoint1");
        } else {

            Drawable marker1=getResources().getDrawable(android.R.drawable.star_big_on);
            int markerWidth1 = marker1.getIntrinsicWidth();
            int markerHeight1 = marker1.getIntrinsicHeight();
            marker1.setBounds(0, 0, markerHeight1, markerWidth1);


            myItemizedOverlay = new MyItemizedOverlay(marker1);
            mapView.getOverlays().add(myItemizedOverlay);

            GeoPoint myPoint2 = new GeoPoint((int) (user.getLatitude()*1000000), (int) (user.getLongitude()*1000000));
            myItemizedOverlay.addItem(myPoint2, "myPoint2", "myPoint2");
        }

    }
    listView.setAdapter(adapter);
}

这是我的LazyAdapter 类。

public class LazyAdapter extends BaseAdapter {

    private Activity activity;
    private String[] data;
    private static LayoutInflater inflater=null;
    public ImageLoader imageLoader;
    private User userList;

    public LazyAdapter(Activity a, String[] d) {
        activity = a;
        data=d;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        imageLoader=new ImageLoader(activity.getApplicationContext());
    }

    public LazyAdapter(Activity b, String[] mStrings, User user) {
        activity = b;
        data=mStrings;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        imageLoader=new ImageLoader(activity.getApplicationContext());
        userList = user;
    }

    public int getCount() {
        return data.length;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi=convertView;
        if(convertView==null)
            vi = inflater.inflate(R.layout.item, null);

        TextView text=(TextView)vi.findViewById(R.id.text);
        TextView text1=(TextView)vi.findViewById(R.id.text1);
        ImageView image=(ImageView)vi.findViewById(R.id.image);
        text.setText("Name: " +userList.getFirstName()+" "+userList.getLastName());
        text1.setText("Gender: " +userList.getGender());
        imageLoader.DisplayImage(data[position], image);
        return vi;
    }
}

这是用于显示用户列表的 XML - 我需要在一个 TextView 和 Gender< 上显示用户全名/code> 第二个 TextView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content">
  <ImageView
      android:id="@+id/image"
      android:layout_width="50dip"
      android:layout_height="50dip" android:src="@drawable/stub" android:scaleType="centerCrop"/>
  <TextView
      android:id="@+id/text"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_weight="1" android:layout_gravity="left|center_vertical" android:textSize="20dip" android:layout_marginLeft="10dip"/>
   <TextView
      android:id="@+id/text1"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_weight="1" android:layout_gravity="left|center_vertical" android:textSize="20dip" android:layout_marginLeft="10dip"/>
</LinearLayout>

这就是我在模拟器中得到的结果 - 一个用户在我的 ListView 中显示两次，为什么会这样？但它应该是顶部的一个用户信息和下面的第二个用户信息。

Answer 1

您需要向适配器提供完整的用户列表

@Override
protected void onPostExecute(ArrayList<User> response) {

    // add all users to the adapter
    adapter=new LazyAdapter(ThesisProjectAndroid.this, mStrings, response);

    for(User user : response){

        System.out.println("User:- " +user.getFirstName());

        // ---- here be ur other code ----
    }
    listView.setAdapter(adapter);
}

您的适配器

public class LazyAdapter extends BaseAdapter {

    private Activity activity;
    private String[] data;
    private static LayoutInflater inflater=null;
    public ImageLoader imageLoader;
    private List<User> userList;

    public LazyAdapter(Activity a, String[] d) {
        activity = a;
        data=d;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        imageLoader=new ImageLoader(activity.getApplicationContext());
    }

    public LazyAdapter(Activity b, String[] mStrings, List<User> user) {
        activity = b;
        data=mStrings;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        imageLoader=new ImageLoader(activity.getApplicationContext());
        userList = user;
    }

    // ---- here be ur other code ----

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi=convertView;
        if(convertView==null)
            vi = inflater.inflate(R.layout.item, null);

        TextView text=(TextView)vi.findViewById(R.id.text);
        TextView text1=(TextView)vi.findViewById(R.id.text1);
        ImageView image=(ImageView)vi.findViewById(R.id.image);
        text.setText("Name: " +userList.get(position).getFirstName()+" "+userList.get(position).getLastName());
        text1.setText("Gender: " +userList.get(position).getGender());
        imageLoader.DisplayImage(data[position], image);
        return vi;
    }
}