fragment的入门DEMO

效果图：

代码如下：

1、main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <fragment
        android:id="@+id/title"
        class="com.njupt.fragment1.TitleFragment"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        />

    <FrameLayout
        android:id="@+id/detail"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        />

</LinearLayout>

2、TitleFragment

package com.njupt.fragment1;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class TitleFragment extends ListFragment {

	private String[] data = new String[]{
		"星期一",
		"星期二",
		"星期三",
		"星期四",
		"星期五",
		"星期六",
		"星期天"
	};
	private int currentPosition = 0;

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);

		setListAdapter(new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_activated_1,android.R.id.text1,data));
		showDetail(currentPosition);
	}

	public void showDetail(int index){
		FragmentManager fm = getFragmentManager();
		DetailFragment detail = (DetailFragment) fm.findFragmentById(R.id.detail);
		if(detail == null || index != detail.getShowIndex()){
			getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
			getListView().setItemChecked(index, true);
			detail = DetailFragment.getInstance(index);

			FragmentTransaction ft = fm.beginTransaction();
			ft.replace(R.id.detail, detail);
			ft.commit();
		}

	}

	@Override
	public void onListItemClick(ListView l, View v, int position, long id) {
		super.onListItemClick(l, v, position, id);

		showDetail(position);
	}

}

3、DetailFragment

package com.njupt.fragment1;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class DetailFragment extends Fragment {

	private String[] data = new String[]{
		"星期一",
		"星期二",
		"星期三",
		"星期四",
		"星期五",
		"星期六",
		"星期天",
	};

	public static DetailFragment getInstance(int index){
		DetailFragment df = new DetailFragment();
		Bundle args = new Bundle();
		args.putInt("index", index);
		df.setArguments(args);
		return df;
	}

	public int getShowIndex(){
		return getArguments().getInt("index");
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		TextView tv = new TextView(getActivity());
		tv.setText(data[getShowIndex()]);
		return tv;
	}

}