极致精简的fragment实现导航栏切换demo

一个小demo。用button+fragment实现导航栏切换界面，适合刚接触的新手看一下。

效果图

点击第二个后

源码：

主界面

<span style="font-size:18px;"><span style="font-size:14px;">package com.example.fragment;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends FragmentActivity implements OnClickListener {

	Button b1, b2;
	FragmentManager fragmentManager;
	FragmentTransaction fragmentTransaction;
	ArticleFragment fragment;
	ArticleFragment1 fragment1;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		fragmentManager = getFragmentManager();

		fragment = new ArticleFragment();
		fragment1 = new ArticleFragment1();
		FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
		fragmentTransaction.replace(R.id.fg, fragment);
		fragmentTransaction.commit();

		initView();
	}

	private void initView() {
		// TODO Auto-generated method stub
		b1 = (Button) findViewById(R.id.b1);
		b2 = (Button) findViewById(R.id.b2);
		b1.setOnClickListener(this);
		b2.setOnClickListener(this);

	}

	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		switch (v.getId()) {
		case R.id.b1:
			FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
			fragmentTransaction.replace(R.id.fg, fragment);
			fragmentTransaction.commit();
			break;
		case R.id.b2:
			FragmentTransaction fragmentTransaction1 = fragmentManager.beginTransaction();
			fragmentTransaction1.replace(R.id.fg, fragment1);
			fragmentTransaction1.commit();
			break;
		default:
			break;
		}
	}
}

主界面布局：

<span style="font-size:18px;"><span style="font-size:14px;"><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}" >

    <LinearLayout
        android:id="@+id/fg"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_alignParentBottom="true"
        android:weightSum="1" >

        <Button
            android:id="@+id/b1"
            android:layout_width="0dp"
            android:layout_height="40dp"
            android:layout_weight="0.5"
            android:text="第一个" />

        <Button
            android:id="@+id/b2"
            android:layout_width="0dp"
            android:layout_height="40dp"
            android:layout_weight="0.5"
            android:text="第二个" />
    </LinearLayout>

</RelativeLayout>

第一个fragment界面

<span style="font-size:18px;"><span style="font-size:14px;">package com.example.fragment;

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

public class ArticleFragment extends Fragment {

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		return inflater.inflate(R.layout.article_view, container,false);
	}

}

第一个fragment的布局

<span style="font-size:18px;"><span style="font-size:14px;"><?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" >
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >
        <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/homepage"/>

    </ScrollView>

</LinearLayout>

第二个Fragment界面

<span style="font-size:18px;"><span style="font-size:14px;">package com.example.fragment;

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

public class ArticleFragment1 extends Fragment {

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		return inflater.inflate(R.layout.article_view1, container,false);
	}

}

第二个fragment的布局文件

<span style="font-size:18px;"><span style="font-size:14px;"><?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" >
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >
        <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/section"/>

    </ScrollView>

</LinearLayout>

源码下载：

http://download.csdn.net/detail/shoneworn/8316915