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