我给你的建议是创建一个单独的类,继承Adapter(或其某个子类)。
这里有一个简单的String数组适配器的例子。
package ro.gebs.captoom.adapters;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import antistatic.spinnerwheel.adapters.AbstractWheelTextAdapter;
import com.example.captoom.R;
public class LanguagesAdapter extends AbstractWheelTextAdapter {
private String languages[];
public LanguagesAdapter(Context context) {
super(context, R.layout.lang_item, NO_RESOURCE);
languages = context.getResources().getStringArray(R.array.lang_array);
setItemTextResource(R.id.language_txt);
}
@Override
public View getItem(int index, View cachedView, ViewGroup parent) {
View view = super.getItem(index, cachedView, parent);
return view;
}
@Override
public int getItemsCount() {
return languages.length;
}
@Override
protected CharSequence getItemText(int index) {
return languages[index];
}
}
并且使用方法很简单,只需使用.setAdapter()
方法即可。
或者另一个例子,它使用了ArrayAdapter:
package apc.example;
import java.util.ArrayList;
import utils.BitmapManager;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class PersonAdapter extends ArrayAdapter<Person> {
Context context;
int layoutResourceId;
ArrayList<Person> data = null;
public PersonAdapter(Context context, int layoutResourceId,
ArrayList<Person> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ItemHolder holder = null;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ItemHolder();
holder.imgIcon = (ImageView) row.findViewById(R.id.icon);
holder.txtName = (TextView) row.findViewById(R.id.title);
holder.txtDescription = (TextView) row.findViewById(R.id.desc);
row.setTag(holder);
} else {
holder = (ItemHolder) row.getTag();
}
Person bean = data.get(position);
holder.txtName.setText(bean.getName());
holder.txtDescription.setText(bean.getDescription());
Bitmap b = BitmapFactory.decodeResource(context.getResources(), R.drawable.user);
BitmapManager.INSTANCE.setPlaceholder(b);
BitmapManager.INSTANCE.loadBitmap(bean.getUrl(), holder.imgIcon, 80, 80);
return row;
}
public static class ItemHolder {
public ImageView imgIcon;
TextView txtName;
TextView txtDescription;
}
public void updateAdapter(ArrayList<Person> pers){
this.data = pers;
}
}
这是一个适配器的例子,用于更复杂的类,该类具有比简单字符串更多的字段。但可以轻松修改为ArrayAdapter<String>
,然后从那里开始。
无论如何,我认为为列表视图编写自定义适配器始终是最佳实践。
希望这有所帮助!