Android开发--页面切换

1、创建android项目、项目文档如下

　　

2、activity_main布局，Androidv4包里自带的,既然是自带的那么直接拿来用就可以了,当然前提是你得工程里有v4包

<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.test02.MainActivity" >
    
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:background="@android:color/holo_orange_dark"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tv1"
            android:layout_width="wrap_content"
            android:layout_height="30dp"
            android:layout_weight="1"
            android:gravity="center"
            android:text="链接1"
            android:textColor="@android:color/white"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/tv2"
            android:layout_width="wrap_content"
            android:layout_height="30dp"
            android:layout_weight="1"
            android:gravity="center"
            android:text="链接2"
            android:textColor="@android:color/secondary_text_dark"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/tv3"
            android:layout_width="wrap_content"
            android:layout_height="30dp"
            android:layout_weight="1"
            android:gravity="center"
            android:text="链接3"
            android:textColor="@android:color/secondary_text_dark"
            android:textSize="18sp" />
    </LinearLayout>

   

    <android.support.v4.view.ViewPager
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:flipInterval="30"
        android:persistentDrawingCache="animation" />

</LinearLayout>

fragment1_layout布局，fragment2_layout，fragment3_layout布局一样，只是背景颜色不同

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" 
    android:background="@android:color/holo_blue_bright"
    >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="50sp"
        android:text="page1" />

   
 
</RelativeLayout>

3、辅助类、MyFragmentPagerAdapter

package com.example.test02;

import java.util.List;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;



public class MyFragmentPagerAdapter extends FragmentPagerAdapter {

    private FragmentManager fragmentManager;
    private List<Fragment> fragmentList;
    
    
    public MyFragmentPagerAdapter(FragmentManager fragmentManager,List<Fragment> fragmentList) {
        super(fragmentManager);
        this.fragmentManager = fragmentManager;
        this.fragmentList = fragmentList;
    }

    @Override
    public Fragment getItem(int arg0) {
        // TODO Auto-generated method stub
        return fragmentList.get(arg0);
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return fragmentList.size();
    }

}

　fragment1_layout类，fragment2_layout类、fragment3_layout类差不多，只是调用布局不同

package com.example.test02;


import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment1 extends Fragment{
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
　　　　　　//调用布局
        View view = inflater.inflate(R.layout.fragment1_layout, container,false);
        return view;
    }

}

MainActivity类

package com.example.test02;

import java.util.ArrayList;
import java.util.List;

import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends FragmentActivity {

    private ViewPager viewPager;
    private List<Fragment> fragmentList;
    private TextView view1, view2, view3;
    private ImageView iv;
    private int currIndex;// 当前页卡编号
    private int bmpW;// 横线图片宽度
    private int offset;// 图片移动的偏移量

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        /*
         * 初始化图片
         */
        iv = (ImageView) findViewById(R.id.cursor);
        // 获取横线图片宽度
        bmpW = BitmapFactory.decodeResource(getResources(), R.drawable.a1)
                .getWidth();
        // 获取屏幕分辨率
        DisplayMetrics dm = new DisplayMetrics();
        // 把屏幕尺寸信息赋值给DisplayMetrics dm，注意不是set
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        // 屏幕宽度
        int screenW = dm.widthPixels;
        // 计算偏移量
        offset = (screenW / 3 - bmpW) / 2;
        // imgageview设置平移，使下划线平移到初始位置（平移一个offset）
        Matrix matrix = new Matrix();
        matrix.postTranslate(offset, 0);
        Log.i("平移", "" + offset);
        //iv.setImageMatrix(matrix);
        
        
        Animation animation_init = new TranslateAnimation(0,offset, 0, 0);// 平移动画
        animation_init.setFillAfter(true);// 动画终止时停留在最后一帧，不然会回到没有执行前的状态
        animation_init.setDuration(200);// 动画持续时间0.2秒
        iv.startAnimation(animation_init);// 是用ImageView来显示动画的
        

        /*
         * 初始化ViewPager
         */
        viewPager = (ViewPager) findViewById(R.id.vp);
        fragmentList = new ArrayList<Fragment>();
        // Fragment btFragment= new ButtonFragment();
        Fragment fragment1 = new Fragment1();
        Fragment fragment2 = new Fragment2();
        Fragment fragment3 = new Fragment3();
        fragmentList.add(fragment1);
        fragmentList.add(fragment2);
        fragmentList.add(fragment3);

        FragmentManager fragmentManager = getSupportFragmentManager();
        MyFragmentPagerAdapter pagerAdapter = new MyFragmentPagerAdapter(
                fragmentManager, fragmentList);
        viewPager.setAdapter(pagerAdapter);
        viewPager.setCurrentItem(0);// 设置当前显示标签页为第一页
        
        viewPager.setOnPageChangeListener(new OnPageChangeListener() {

            private int one = offset * 2 + bmpW;// 两个相邻页面的偏移量

            @Override
            public void onPageSelected(int arg0) {

                Animation animation = new TranslateAnimation(currIndex * one+offset,
                        arg0 * one+offset, 0, 0);// 平移动画
                currIndex = arg0;
                animation.setFillAfter(true);// 动画终止时停留在最后一帧，不然会回到没有执行前的状态
                animation.setDuration(200);// 动画持续时间0.2秒
                iv.startAnimation(animation);// 是用ImageView来显示动画的
                int i = currIndex + 1;
                //Toast.makeText(MainActivity.this, "您选择了第"+i+"个页卡", 100).show();  

            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }
        });
        

        /*
         * 初始化链接
         */
        view1 = (TextView) findViewById(R.id.tv1);
        view2 = (TextView) findViewById(R.id.tv2);
        view3 = (TextView) findViewById(R.id.tv3);

        view1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                viewPager.setCurrentItem(0);
            }
        });
        view2.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                viewPager.setCurrentItem(1);
            }
        });
        view3.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                viewPager.setCurrentItem(2);
            }
        });

        
    }

}

效果图：

　　

　　页面之间可以切换