我有一个列表视图，显示来自JSON的数据。我想单击一个特定的列表视图项，当单击该项时，它应显示已单击的列表视图项的整个视图。
Ex：列表视图中的新闻列表---＆gt;点击任何新闻----＆gt;该新闻的详细版本
我创建的那个无法正常工作。当我点击列表视图中的新闻项时，它会显示所有新闻的详细版本。我该如何解决这个问题。
所以这是我的NewsFragment类。它有listview
package com.fortuna.cinemalk;
import java.util.ArrayList;
import android.app.Activity;
import android.app.FragmentManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.ListView;
import android.content.Intent;
import android.widget.AdapterView;
import com.fortuna.cinemalk.adapter.LazyAdapter;
import com.fortuna.cinemalk.model.BaseElement;
import com.fortuna.cinemalk.service.CommonVariable;
import com.fortuna.cinemalk.service.JSONServices;
import com.fortuna.cinemalk.util.Element;
public class NewsFramgment extends Fragment {
private GridView gridView;
private ListView listView;
private ArrayList<BaseElement> News;
private LazyAdapter adapter;
private Activity activity;
private CommonVariable commonVariable;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.news_fragment, container,
false);
activity = this.getActivity();
commonVariable = (CommonVariable) activity.getApplication();
//gridView = (GridView) view.findViewById(R.id.gridView2);
listView = (ListView) view.findViewById(R.id.list);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id)
{
android.support.v4.app.Fragment detail = new NewsDetailFragment();
android.support.v4.app.FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().add(R.id.content_frame, detail).addToBackStack("back").commit();
/* FragmentTransaction fragmentTransaction = getFragmentManager()
.beginTransaction();
Fragment profileFragment = new NewsDetailFragment();//the fragment you want to show
Bundle bundle = null;
profileFragment.setArguments(bundle);
fragmentTransaction
.add(R.id.content_frame, profileFragment);//R.id.content_frame is the layout you want to replace
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();*/
}
});
new BackGround().execute();
return view;
}
public class BackGround extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
News = JSONServices.getNewsDescription();
return null;
}
@Override
/* check again */
protected void onPostExecute(Void result) {
commonVariable.setNewsDescription(News);
adapter = new LazyAdapter(News, activity,Element.NEWS_LIST.getType());
listView.setAdapter(adapter);
super.onPostExecute(result);
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
}
}
这是我的NewsDetailFragment，这是整个新闻视图的片段。
package com.fortuna.cinemalk;
import java.util.ArrayList;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.AdapterView;
import com.fortuna.cinemalk.adapter.LazyAdapter;
import com.fortuna.cinemalk.model.BaseElement;
import com.fortuna.cinemalk.service.CommonVariable;
import com.fortuna.cinemalk.service.JSONServices;
import com.fortuna.cinemalk.util.Element;
public class NewsDetailFragment extends Fragment {
private View view1;
private ArrayList<BaseElement> newsdetail;
private LazyAdapter adapter;
private Activity activity;
private CommonVariable commonVariable;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.newsdetail_fragment, container,
false);
activity = this.getActivity();
commonVariable = (CommonVariable) activity.getApplication();
view1 = (View) view.findViewById(R.id.list);
new BackGround().execute();
return view;
}
public class BackGround extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
newsdetail = JSONServices.getNewsDescription();
return null;
}
@Override
/* check again */
protected void onPostExecute(Void result) {
commonVariable.setTheater(newsdetail);
adapter = new LazyAdapter(newsdetail, activity,Element.NEWS_DETAIL.getType());
((AdapterView<ListAdapter>) view1).setAdapter(adapter);
super.onPostExecute(result);
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
}
}
答案 0 :(得分：1)
你应该像我在这里展示的那样传递新闻：
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id)
{
android.support.v4.app.Fragment detail = NewsDetailFragment.newInstance(id);
android.support.v4.app.FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().add(R.id.content_frame,
detail).addToBackStack("back").commit();
........
public class NewsDetailFragment extends Fragment {
public static NewsDetailFragment newInstance (int id){
NewsDetailFragment frag=new NewsDetailFragment ();
Bundle bundle=new Bundle();
bundle.putInt("id",id);
frag.setArguments(bundle);
return frag;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
........
new BackGround().execute(getArguments.getInt("id"));
}
.......
public class BackGround extends AsyncTask<Void, Void, Integer> {
@Override
protected String doInBackground(Integer... params) {
int id=params[0];
newsdetail = JSONServices.getNewsDescription(id);
return newsdetail;
}
protected void onPostExecute(String newsdetail) {
commonVariable.setTheater(newsdetail);
adapter = new LazyAdapter(newsdetail, activity,Element.NEWS_DETAIL.getType());
((AdapterView<ListAdapter>) view1).setAdapter(adapter);
super.onPostExecute(result);
}