我正在尝试为我的活动实现自定义适配器，它将从两个ArrayLists填充listview。但是我对下一步做什么感到困惑？ 这是我的代码：
public class Offers extends Activity
{
ListView latesttrans;
Boolean flagValue = false;
ArrayList<String> listItems = new ArrayList<String>();
ArrayList<String> listAddress = new ArrayList<String>();
String[] addr;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_offers);
latesttrans = (ListView) findViewById(R.id.listView1);
Uri latesttransuri = Uri.parse("content://sms/inbox");
Cursor latesttranscursor = getContentResolver().query(latesttransuri, new String[]{"_id","address","date","body"}, null, null, null);
if(flagValue == false)
{
latesttranscursor.moveToFirst();
flagValue = true;
}
String address = null,body = null;
int i=0;
while(latesttranscursor.moveToNext())
{
address=latesttranscursor.getString(1);
long date = latesttranscursor.getLong(2);
String sdate = millisToDate(date);
body = latesttranscursor.getString(3);
if(body.contains("FREE"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
else if(body.contains("unlimited"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
else if(body.contains("unlimited"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
else if(body.contains("OFF"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
else if(body.contains("off"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
else if(body.contains("lowest"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
else if(body.contains("save"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
else if(body.contains("CHEAPER"))
{
listItems.add(i,body);
listAddress.add(i,address);
i++;
}
}
latesttrans.setAdapter(new MyCustomAdapter(this));
}
public String millisToDate(long currentTime)
{
String finalDate;
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(currentTime);
Date date = calendar.getTime();
finalDate = date.toString();
return finalDate;
}
}
class SingleRow2
{
String title;
String description;
SingleRow2(String title, String description)
{
this.title=title;
this.description=description;
}
}
class MyCustomAdapter extends BaseAdapter
{
int i=0;
Boolean flagValue = false;
ArrayList<SingleRow2> list;
Context context;
public MyCustomAdapter(Offers offers)
{
// TODO Auto-generated constructor stub
}
public int getCount()
{
return list.size();
}
public Object getItem(int arg0)
{
// TODO Auto-generated method stub
return list.get(arg0);
}
public long getItemId(int position)
{
return position;
}
public View getView(int arg0, View arg1, ViewGroup viewGroup)
{
LayoutInflater inflater= (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(R.layout.single_row_offers,viewGroup,false);
TextView addresstext = (TextView) row.findViewById(R.id.textViewSingleOffer1);
TextView bodytext = (TextView) row.findViewById(R.id.textViewSingleOffer2);
return (row);
}
}
我无法在这里实现getView（）方法..任何想法？
答案 0 :(得分：5)
您的适配器：
class TestAdapter extends BaseAdapter {
ArrayList<String> listItem;
ArrayList<String> listAddress;
Context mContext;
//constructor
public TestAdapter(Context mContext, ArrayList<String> listItem,
ArrayList<String> listAddress) {
this.mContext = mContext;
this.listItem = listItem;
this.listAddress = listAddress;
}
public int getCount() {
return listItem.size();
}
public Object getItem(int arg0) {
return null;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View arg1, ViewGroup viewGroup)
{
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(R.layout.single_row_offers, viewGroup, false);
TextView addresstext = (TextView) row.findViewById(R.id.textViewSingleOffer1);
TextView bodytext = (TextView) row.findViewById(R.id.textViewSingleOffer2);
bodytext.setText(listItem.get(position));
addresstext.setText(listAddress.get(position));
return row;
}
}
latesttrans.setAdapter(new TestAdapter(this, listItem,listAddress));
答案 1 :(得分：2)
创建用于保存数据的类。
public class Data {
private String body;
private String address;
public Data(String body, String address) {
this.body= body;
this.address = address;
}
public String getBody() { return body; }
public String getAddress() { return address; }
}
然后将数据加载到该对象中并将它们添加到列表中。
public class Offers extends Activity {
//...
ArrayList<Data> dataList = new ArrayList<Data>();
//...
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_offers);
latesttrans = (ListView) findViewById(R.id.listView1);
Uri latesttransuri = Uri.parse("content://sms/inbox");
Cursor latesttranscursor = getContentResolver().query(latesttransuri, new String[]{"_id","address","date","body"}, null, null, null);
if(flagValue == false) {
latesttranscursor.moveToFirst();
flagValue = true;
}
String address = null,body = null;
int i=0;
while(latesttranscursor.moveToNext()) {
address=latesttranscursor.getString(1);
long date = latesttranscursor.getLong(2);
String sdate = millisToDate(date);
body = latesttranscursor.getString(3);
if(body.contains("FREE") || body.contains("unlimited") || body.contains("OFF") || body.contains("off") || body.contains("lowest") || body.contains("save") || body.contains("CHEAPER"))
{
dataList.add(new Data(body, address));
}
}
latesttrans.setAdapter(new MyCustomAdapter(this, dataList));
}
public String millisToDate(long currentTime) {
String finalDate;
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(currentTime);
Date date = calendar.getTime();
finalDate = date.toString();
return finalDate;
}
}
然后，您可以创建ArrayAdapter而不是BaseAdapter。
public class MyCustomAdapter extends ArrayAdapter<Data> {
public class ViewHolder {
TextView address;
TextView body;
}
public MyCustomAdapter(Context context, List<Data> objects) {
super(context, R.layout.single_row_offers, objects);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row;
ViewHolder viewHolder;
if(convertView == null) {
row = LayoutInflater.from(getContext()).inflate(R.layout.single_row_offers, parent, false);
viewHolder = new ViewHolder();
viewHolder.address = row.findViewById(R.id.textViewSingleOffer1);
viewHolder.body = row.findViewById(R.id.textViewSingleOffer2);
row.setTag(viewHolder);
} else {
row = convertView;
viewHolder = (ViewHolder) row.getTag();
}
Data item = getItem(position);
viewHolder.address.setText(item.getAddress());
viewHolder.body.setText(item.getBody());
return row;
}
}