1效果图:
2.程序的目录结构
三、具体的编码实现
1、 在主布局界面中加入ViewPager组件,以及底部的小点,activity_main.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<LinearLayout
android:id="@+id/ll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="24.0dip"
android:orientation="horizontal" >
<ImageView
android:id="@+id/page0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:clickable="true"
android:padding="5dip"
android:src="@drawable/page_indicator_focused" />
<ImageView
android:id="@+id/page1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:clickable="true"
android:padding="5dip"
android:src="@drawable/page_indicator_unfocused" />
<ImageView
android:id="@+id/page2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:clickable="true"
android:padding="5dip"
android:src="@drawable/page_indicator_unfocused" />
<ImageView
android:id="@+id/page3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:clickable="true"
android:padding="5dip"
android:src="@drawable/page_indicator_unfocused" />
<ImageView
android:id="@+id/page4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:clickable="true"
android:padding="5dip"
android:src="@drawable/page_indicator_unfocused" />
<ImageView
android:id="@+id/page5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:clickable="true"
android:padding="5dip"
android:src="@drawable/page_indicator_unfocused" />
</LinearLayout>
</RelativeLayout>
2、接着在guide_view01.xml等几个布局页面中添加引导界面要显示的图片和控件,因为这几个布局界面都大同小异,所以在这里我就不一一贴出来了吧,有需要的同学可以直接下载源码,guide_view01.xml:
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/w01"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:gravity="center"
android:text="@string/guide_text01"
android:textColor="@color/TextColor"
android:textSize="22sp" />
</RelativeLayout>
3、然后是要实现动画效果的布局界面,guide_door.xml:
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/imageLeft"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:scaleType="fitXY"
android:src="@drawable/w_left" />
<ImageView
android:id="@+id/imageRight"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:scaleType="fitXY"
android:src="@drawable/w_right"
android:visibility="visible" />
<TextView
android:id="@+id/anim_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:gravity="center"
android:text=" \n \n微信,是一个生活方式\n \n "
android:textColor="#fff"
android:textSize="22sp" />
</RelativeLayout>
布局界面已经讲解完毕,接下来让我们进行详细的代码讲解,ViewPager适配器代码,ViewPagerAdapter.java:package com.yangyu.myguideview02;
package com.yangyu.myguideview02;
import java.util.ArrayList;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
/**
* @author yangyu
* 功能描述:ViewPager适配器,用来绑定数据和view
*/
public class ViewPagerAdapter extends PagerAdapter {
//界面列表
private ArrayList<View> views;
public ViewPagerAdapter (ArrayList<View> views){
this.views = views;
}
/**
* 获得当前界面数
*/
@Override
public int getCount() {
if (views != null) {
return views.size();
}
return 0;
}
/**
* 初始化position位置的界面
*/
@Override
public Object instantiateItem(View view, int position) {
((ViewPager) view).addView(views.get(position), 0);
return views.get(position);
}
/**
* 判断是否由对象生成界面
*/
@Override
public boolean isViewFromObject(View view, Object arg1) {
return (view == arg1);
}
/**
* 销毁position位置的界面
*/
@Override
public void destroyItem(View view, int position, Object arg2) {
((ViewPager) view).removeView(views.get(position));
}
}
主程序入口activity类,MainActivity.java:
package com.yangyu.myguideview02;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
/**
* @author yangyu
* 功能描述:主程序入口activity
*/
public class MainActivity extends Activity {
// 定义ViewPager对象
private ViewPager viewPager;
// 定义ViewPager适配器
private ViewPagerAdapter vpAdapter;
// 定义一个ArrayList来存放View
private ArrayList<View> views;
//定义各个界面View对象
private View view1,view2,view3,view4,view5,view6;
// 定义底部小点图片
private ImageView pointImage0, pointImage1, pointImage2, pointImage3,pointImage4, pointImage5;
//定义开始按钮对象
private Button startBt;
// 当前的位置索引值
private int currIndex = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
}
/**
* 初始化组件
*/
private void initView() {
//实例化各个界面的布局对象
LayoutInflater mLi = LayoutInflater.from(this);
view1 = mLi.inflate(R.layout.guide_view01, null);
view2 = mLi.inflate(R.layout.guide_view02, null);
view3 = mLi.inflate(R.layout.guide_view03, null);
view4 = mLi.inflate(R.layout.guide_view04, null);
view5 = mLi.inflate(R.layout.guide_view05, null);
view6 = mLi.inflate(R.layout.guide_view06, null);
// 实例化ViewPager
viewPager = (ViewPager) findViewById(R.id.viewpager);
// 实例化ArrayList对象
views = new ArrayList<View>();
// 实例化ViewPager适配器
vpAdapter = new ViewPagerAdapter(views);
// 实例化底部小点图片对象
pointImage0 = (ImageView) findViewById(R.id.page0);
pointImage1 = (ImageView) findViewById(R.id.page1);
pointImage2 = (ImageView) findViewById(R.id.page2);
pointImage3 = (ImageView) findViewById(R.id.page3);
pointImage4 = (ImageView) findViewById(R.id.page4);
pointImage5 = (ImageView) findViewById(R.id.page5);
//实例化开始按钮
startBt = (Button) view6.findViewById(R.id.startBtn);
}
/**
* 初始化数据
*/
private void initData() {
// 设置监听
viewPager.setOnPageChangeListener(new MyOnPageChangeListener());
// 设置适配器数据
viewPager.setAdapter(vpAdapter);
//将要分页显示的View装入数组中
views.add(view1);
views.add(view2);
views.add(view3);
views.add(view4);
views.add(view5);
views.add(view6);
// 给开始按钮设置监听
startBt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startbutton();
}
});
}
public class MyOnPageChangeListener implements OnPageChangeListener {
@Override
public void onPageSelected(int position) {
switch (position) {
case 0:
pointImage0.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_focused));
pointImage1.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
break;
case 1:
pointImage1.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_focused));
pointImage0.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
pointImage2.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
break;
case 2:
pointImage2.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_focused));
pointImage1.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
pointImage3.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
break;
case 3:
pointImage3.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_focused));
pointImage4.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
pointImage2.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
break;
case 4:
pointImage4.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_focused));
pointImage3.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
pointImage5.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
break;
case 5:
pointImage5.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_focused));
pointImage4.setImageDrawable(getResources().getDrawable(R.drawable.page_indicator_unfocused));
break;
}
currIndex = position;
// animation.setFillAfter(true);// True:图片停在动画结束位置
// animation.setDuration(300);
// mPageImg.startAnimation(animation);
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
}
/**
* 相应按钮点击事件
*/
private void startbutton() {
Intent intent = new Intent();
intent.setClass(MainActivity.this,GuideViewDoor.class);
startActivity(intent);
this.finish();
}
}
大家也许想借用此模板进行不同个数的画面进行切换,比如说三个画面切换,当设置view的个数为三个时候,进行相关改动运行后,程序会报错,错误截图为
The application’s PagerAdapter changed the adapter’s contents without calling PagerAdapter#notifyDataSetChanged
FATAL EXCEPTION: main java.lang.IllegalStateException: The application’s PagerAdapter changed the adapter’s contents without calling PagerAdapter#notifyDataSetChanged!
出这个错,是因为你的PagerAdapter中的数据变了,但是没有调用adapter.notifyDataSetChanged方法。
此时大家不用急,只用加一个函数就可以解决问题
vpAdapter.notifyDataSetChanged();
vpAdapter为自定义ViewPager适配器。
源码下载:点击下载源码
主要内容引用链接:http://www.apkbus.com/android-4205-1.html