我在 fragment 类中有一个 ListView ，它从 JSON 获取数据。到目前为止，我能够在 ListView 中显示数据。 (这里的数据是新闻项目)。我想在 ListView 中单击特定新闻时显示新闻的详细页面。
例如:Listview 仅包含新闻的标题和图像。单击该 ListView 时，它应该显示该特定新闻 fragment 的详细版本。我该怎么做？
这是具有 Listview 的 fragment 类。
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();
}
});
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();
}
}
}
在代码中，您会注意到当单击某个项目时，它会移动到 NewsDetailFragment。这就是我现在要编码的类(class)。
PS:我的 JSON 已经包含所有详细信息，包括标题、图像、描述..
更新::这是我的 NewsDetailFragment 类。它一次显示所有新闻，而不是我点击的那个。
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.ListAdapter;
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 NewsDetailFragment extends Fragment {
private GridView gridView;
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);
/*gridView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
android.support.v4.app.Fragment detail = new TheaterDetailFragment();
android.support.v4.app.FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().add(R.id.content_frame, detail).addToBackStack("back").commit();
}
}); */
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();
}
}
}
最佳答案
您可以使用以下内容
FragmentTransaction fragmentTransaction = getSupportFragmentManager()
.beginTransaction();
Fragment profileFragment = new MovieDetailFragment();//the fragment you want to show
profileFragment.setArguments(bundle);
fragmentTransaction
.replace(R.id.content_frame, profileFragment);//R.id.content_frame is the layout you want to replace
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
编辑
FragmentTransaction 用于执行添加或删除 fragment 等操作，即当您替换/更改现有布局时，我们执行此类事务以替换 fragment 。 Bundle 是最方便的工具，用于在配置更改时保存数据更改或将数据从一个 Activity 传递到另一个 Activity 或在 fragment 之间传递数据。 Fragments读这个。
对于 link1和 link2和 docs . bundle 非常容易理解。
希望编辑有所帮助。
关于android - 单击 ListView 中的项目时显示 fragment ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25302698/