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我正在构建一个应用程序，其中一个列表视图显示我的收藏夹粉丝列表。我的球迷名单是this！ 当我在这个列表中的任何项目单击然后告诉我关心的完整个人资料范如this 我的代码 - >如何从ListView中删除项目
public class FavouriteFansActivity extends ListActivity implements OnItemClickListener, OnLongClickListener {
ListView mFavFansListView;
JSONArray jArrayFavFans;//jArrayFavFans that contains jobjects of all fans. each jobj hv data of 1 unique fan!
JSONObject jFavFan_Data;//contain data of an indivisual fan
LazyAdapter adapter;
ArrayList<Object> favFansList;
ArrayList<String> mfavFansImgs;
ItemBean bean;
String favFans;
//String url="http://XXXXX/ManU/";//Live
String url="http://XXXXX/ManU/";//Local
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.on_favourite_fan_list);
prepareFavFanArrayLits();//method that prepare list of my favorite fans....
mFavFansListView = (ListView) findViewById(android.R.id.list);
adapter = new LazyAdapter(this, mfavFansImgs, favFansList);
mFavFansListView.setAdapter(adapter);
mFavFansListView.setOnItemClickListener(this);
mFavFansListView.setOnLongClickListener(this);
/** I am still not getting that when to call onPause(), onResume(), onRestart()... etc ??? */
}
/* .........onItemClick......... */
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
// TODO Auto-generated method stub
ItemBean bean = (ItemBean) adapter.getItem(position);
/**from here-> I am going to start one activity that show the complete profile of a
* particular Fan... According to the unique id received from clicking on ListItem!
*/
Intent in= new Intent(getParent(), FavFanProfile.class);
TabGroupActivity prnt = (TabGroupActivity) getParent();
Bundle fBundle= new Bundle();
fBundle.putString("fanId", bean.getUid());
in.putExtras(fBundle);
prnt.startChildActivity("FavFanProfile", in);
}
/* .........onLongClick......... */
@Override
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(FavouriteFansActivity.this, "To remove...Clk", Toast.LENGTH_SHORT).show();
return false;
}
/** Method used to prepare the List of Favorite Fans
* @author Rupesh */
public void prepareFavFanArrayLits() {
/* return me array containing data of all favFans */
Boolean mkFavFansList=false;
SharedPreferences favFansData = getSharedPreferences("jArrayFavFansPref", MODE_WORLD_WRITEABLE);
favFans=favFansData.getString("favFansData", "");
Log.i("FavFans_List->", "FavFans_DATA readed from prefs:"+favFans.toString());
if(!favFans.equals("")){
try {
mkFavFansList=true;
jArrayFavFans=new JSONArray(favFans);
favFansList = new ArrayList<Object>();
mfavFansImgs = new ArrayList<String>();
Log.i("fav_fansONfav", jArrayFavFans.toString());
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}else {
Log.i("else_favList_img", "list & image are initialized");
favFansList = new ArrayList<Object>();
mfavFansImgs = new ArrayList<String>();
}
// ++++++++
if(mkFavFansList){
try {
for (int i = 0; i < jArrayFavFans.length(); i++) {
// will return the data of each row fetched from JSONArray returned by location1.php
String data_of_each_user = jArrayFavFans.get(i).toString();
Log.i("Data Of User at index " + i + " is", data_of_each_user);
// I put the object at index "i" into JSONObject & retrieve data from name-value pair
jFavFan_Data = jArrayFavFans.getJSONObject(i);// data of User at index i
// in array
AddObjectToList(jFavFan_Data.getString("uniqid").toString(), jFavFan_Data.getString("name"),
jFavFan_Data.getString("distance"));
//Log.i("URL", url+"images/"+jFavFan_Data.get("uniqid").toString()+".png");
mfavFansImgs.add(url+"images/"+jFavFan_Data.get("uniqid").toString()+".png");
Log.i("IMG_URL", url+"images/"+jFavFan_Data.get("uniqid").toString()+".png");
String nm = jFavFan_Data.get("name").toString();
String uid = jFavFan_Data.get("uniqid").toString();
String dis = jFavFan_Data.get("distance").toString();
//System.out.println("Your Name: " + nm);
System.out.println("Your Unique Id: " + uid);
//System.out.println("Your Distance: " + dis);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
} else {
Log.i("NO_FAVORITE_FANS", "No Favorite Fans are added in favorites List!");
Toast.makeText(FavouriteFansActivity.this, "No Fans in Favorite List!", Toast.LENGTH_SHORT).show();
}
// ++++++++++
}
//**********************setting vales in bean*************************
public void AddObjectToList(String uid, String title, String desc) {
bean = new ItemBean();
bean.setUid(uid);
bean.setDescription(desc);
bean.setTitle(title);
favFansList.add(bean);
}
//***********************************************
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
Log.i("favFansData_FavoriteFansActivity.java", "hi...on resume"+favFans);
prepareFavFanArrayLits();
setContentView(R.layout.on_favourite_fan_list);
mFavFansListView = (ListView) findViewById(android.R.id.list);
adapter = new LazyAdapter(this, mfavFansImgs, favFansList);
mFavFansListView.setAdapter(adapter);// come null pointer exception when no fan data is returned! hendle it...
mFavFansListView.setOnItemClickListener(this);
}
}
我在该点停留 - >也就是说，如何从这个列表中移除一个项目（一个粉丝）（favorite_fans_list）... ???
我尝试在onLongClick Listener上做些事情，但它并没有工作....我很高兴有任何指针或一些样本帮助我克服这个问题！
简单地从源中删除的位置，并加载列表视图再次 – Abhi 2012-01-10 15:09:06