我需要添加一个复选框到这个列表视图,我有一个textview/chrono /复选框的row.xml设置。我必须在我的baseadapter扩展中显示复选框吗?此外,为什么getSystemService()错误在我身上?BaseAdapter扩展问题
package com.walkarchdev.tasktracker;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Chronometer;
import android.widget.TextView;
public class TTAdapterView extends BaseAdapter {
public View v;
public TTAdapterView(Context context){
super();
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
this.v = convertView;
if(v==null){
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
}
TextView task = (TextView)v.findViewById(R.id.textView1);
Chronometer time = (Chronometer)v.findViewById(R.id.chronometer1);
//Checkbox complete = (Checkbox)v.findViewById(R.id.checkBox1);
return v;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
}
final TTAdapterView aa = new TTAdapterView(this); // aa = new ArrayAdapter(this,0); myListView.setAdapter(aa); 。 addButton.setOnClickListener(新OnClickListener(){ \t公共无效的onClick(视图v){ \t \t aa.add(myEditText.getText()的toString()); \t \t //taskitems.add(count 。,myEditText.getText()的toString()); \t \t aa.notifyDataSetChanged(); \t \t myEditText.setText( “”); \t \t myEditText.requestFocus(); \t \t \t \t \t} }); –
Intelwalk
2011-04-14 18:13:23
我无法像使用arrayadapter一样添加到我的适配器。用baseadapter做这件事的方法是什么? – Intelwalk 2011-04-14 18:13:54
你不能这么简单地添加BaseAdapter。我从你发布的代码片段看到的是,你从getCount方法返回0。相反,您应该返回列表的大小,因为getcount方法由适配器在内部调用,而该适配器又决定何时调用getView方法。有关更多详细信息,请参阅此链接http://developerlife.com/tutorials/?p=327。和这个http://www.androidguys.com/2008/07/14/fancy-listviews-part-one/ – pankajagarwal 2011-04-18 04:49:34