使用Fragment实现简单的数据交互

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接上一文继续研究Fragment的使用，本文主要实现这样一个简单应用：左边显示标题栏，然后点击它，右边就显示不同的内容，内容根据需求自己作相应变化。代码如下：

MainActivity：

package com.home.testfragment;

import com.home.testfragment.TitleFragment.OnTitleSelectedListener;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.widget.TextView;

public class MainActivity extends FragmentActivity implements
		OnTitleSelectedListener {
	public static String[] names = { "张三", "李四", "王五", "赵六", "蒋七", "小明", "小张",
			"小刘", "小强" };
	private TextView detailText;

	@Override
	protected void onCreate(Bundle arg0) {
		super.onCreate(arg0);
		setContentView(R.layout.main);
		detailText = (TextView) findViewById(R.id.main_tv_detail);
	}

	@Override
	public void OnShowDetails(int position) {
		detailText.setText("我是" + names[position]);
	}
}

TitleFragment：

package com.home.testfragment;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class TitleFragment extends ListFragment {
	OnTitleSelectedListener mCallBack;

	public interface OnTitleSelectedListener {
		public void OnShowDetails(int position);
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		return inflater.inflate(R.layout.fragment_title, container, false);
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setListAdapter(new ArrayAdapter<String>(getActivity(),
				android.R.layout.simple_list_item_1, MainActivity.names));
	}

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);
		try {
			mCallBack = (OnTitleSelectedListener) activity;
		} catch (ClassCastException e) {
			e.printStackTrace();
		}
	}

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

main.xml：

<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/main_FirstFragment"
        android:name="com.home.testfragment.TitleFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1" />

    <TextView
        android:id="@+id/main_tv_detail"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginLeft="20dp"
        android:layout_weight="0.5"
        android:textSize="40sp" />

</LinearLayout>

fragment_title.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="vertical" >

    <ListView
        android:id="@id/android:list"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:drawSelectorOnTop="false" />

</LinearLayout>

附上图片效果：