每个人的情况如何，在过去的一周中，我一直在努力弄清楚将适配器与endlessadapter封装在一起到底意味着什么，但没有成功。我已经尽我所能，尝试了所有有限的知识，到目前为止，我一直在努力挣扎。我已经在线阅读了一些示例，还阅读了endlessadapter的说明，但这并没有真正的帮助。有人可以说明包装我的适配器的含义吗？
我的列表视图如下：
package com.bopbi.ui;
import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import com.bopbi.R;
import com.bopbi.model.LocationAdapter;
import com.bopbi.model.LocationList;
import com.bopbi.model.LocationModel;
import com.bopbi.model.PullToRefreshListView.OnRefreshListener;
import com.bopbi.util.RestClient;
import com.bopbi.model.PullToRefreshListView;
import com.bopbi.util.RestClient.RequestMethod;
import com.google.android.maps.GeoPoint;
import com.google.gson.Gson;
import android.app.ActionBar;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
public class ListRest extends ListActivity {
LocationManager lm;
GeoPoint userLocation;
//static String[] TITLE;
//static String[] DESCRIPTION;
ArrayList<LocationModel> locationArray = null;
LocationAdapter locationAdapter;
LocationList list;
//PullToRefreshListView lv;
TextView loadingText;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(false);
// actionBar.show();
// actionBar.setDisplayShowHomeEnabled(true);
setContentView(R.layout.activity_home);
// lv = (PullToRefreshListView) findViewById(R.id.list);
locationArray = new ArrayList<LocationModel>();
locationAdapter = new LocationAdapter(ListRest.this, R.layout.dublet, locationArray);
((PullToRefreshListView) getListView()).onRefresh();
// lv.setTextFilterEnabled(true);
setListAdapter(locationAdapter);
//this.getListView().scrollTo(0,160);
//this.getListView().scrollTo(0,0);
// Set a listener to be invoked when the list should be refreshed.
((PullToRefreshListView) getListView()).setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh() {
// Do work to refresh the list here.
try {
new LocationSync().execute("http://exposezvous.com/list.php");
} catch(Exception e) {}
}
});
try {
new LocationSync().execute("http://exposezvous.com/list.php");
} catch(Exception e) {}
}
private class LocationSync extends AsyncTask<String, Integer, LocationList> {
@Override
protected void onPreExecute() {
}
protected LocationList doInBackground(String... urls) {
LocationList list = null;
int count = urls.length;
for (int i = 0; i < count; i++) {
try {
// ntar diganti service
RestClient client = new RestClient(urls[i]);
try {
client.Execute(RequestMethod.GET);
} catch (Exception e) {
e.printStackTrace();
}
String json = client.getResponse();
list = new Gson().fromJson(json, LocationList.class);
//
} catch(Exception e) {}
}
return list;
}
protected void onProgressUpdate(Integer... progress) {
}
protected void onPostExecute(LocationList loclist) {
// Obtain MotionEvent object
long downTime = SystemClock.uptimeMillis();
long eventTime = SystemClock.uptimeMillis() + 100;
float x = 1.0f;
float y = 10.0f;
// List of meta states found here: developer.android.com/reference/android/view/KeyEvent.html#getMetaState()
int metaState = 0;
MotionEvent motionEvent = MotionEvent.obtain(
downTime,
eventTime,
MotionEvent.ACTION_MOVE,
x,
y,
metaState
);
for(LocationModel lm : loclist.getLocations())
{
locationArray.add(lm);
}
locationAdapter.notifyDataSetChanged();
// Call onRefreshComplete when the list has been refreshed.
((PullToRefreshListView) getListView()).onRefreshComplete();
((PullToRefreshListView) getListView()).onTouchEvent(motionEvent);
((PullToRefreshListView) getListView()).setLastUpdated("Last Updated on Jan 24, 2013 8:27 PM");
}
}
}
我的自定义适配器如下：
package com.bopbi.model;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.bopbi.R;
public class LocationAdapter extends ArrayAdapter<LocationModel> {
int resource;
String response;
Context context;
private LayoutInflater mInflater;
private final ImageDownloader imageDownloader = new ImageDownloader();
public int count;
public LocationAdapter(Context context, int resource,
List<LocationModel> objects) {
super(context, resource, objects);
this.resource = resource;
mInflater = LayoutInflater.from(context);
}
static class ViewHolder {
TextView username;
ImageView image;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
// Get the current location object
LocationModel lm = (LocationModel) getItem(position);
// Inflate the view
if (convertView == null) {
convertView = mInflater.inflate(R.layout.dublet, null);
holder = new ViewHolder();
holder.username = (TextView) convertView
.findViewById(R.id.username);
holder.image = (ImageView) convertView
.findViewById(R.id.profilePic);
// .findViewById(R.id.it_location_description);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.username.setText(lm.getName());
//String url = "http://***********/small_profile_pic_white_bigger.jpg";
ImageDownloader.Mode mode = ImageDownloader.Mode.CORRECT;
imageDownloader.setMode(mode);
imageDownloader.download(lm.getImage(), holder.image);
return convertView;
}
}
最佳答案
如果我对您的理解正确，那么您正在尝试将EndlessAdapter与LocationAdapter一起使用。
Commonsware的EndlessAdapter的documentation提到，EndlessAdapter提供的构造函数之一将现有的ListAdapter作为其参数。包装适配器需要将LocationAdapter作为参数传递给EndlessAdapter的子类。
private class EndlessLocationAdapter extends EndlessAdapter
{
public EndlessLocationAdapter(LocationAdapter adapter)
{
super(adapter);
}
@Override
protected boolean cacheInBackground() throws Exception
{
//Fetch more data
}
//Other methods such as getPendingView(), appendCachedData()
}
在您的活动中
locationArray = new ArrayList<LocationModel>();
LocationAdapter locationAdapter = new LocationAdapter(ListRest.this, R.layout.dublet, locationArray);
EndlessLocationAdapter endlessLocAdapter = new EndlessLocationAdapter(locationAdapter);
setListAdapter(endlessLocAdapter);