ViewPager实现漂亮的引导页
作者:钻石VIP 时间:2022-12-27 21:56:58
废话就不多说了,直接上效果图和代码
fry.Activity01
package fry;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import com.example.viewPager.R;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class Activity01 extends Activity implements OnPageChangeListener,OnClickListener{
private ViewPager viewPager;
private List<View> views;//用来存放放进ViewPager里面的ImageView
private int[] imageID;//
private ImagePagerAdapter adapter;//适配器
private LinearLayout linearLayout;
private int currentPoint;//当前被选中中页面的下标
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity01);
initData();
initView();
}
//初始化view
void initView(){
adapter=new ImagePagerAdapter(views);
viewPager=(ViewPager) findViewById(R.id.viewPager);
viewPager.setAdapter(adapter);
linearLayout=(LinearLayout) findViewById(R.id.linearLayout);
initPoint();
viewPager.setOnPageChangeListener(this);
}
//初始化数据
void initData(){
//将图片的id全部放到imageID集合中
imageID=new int[]{R.drawable.guide1,R.drawable.guide2,R.drawable.guide3,R.drawable.guide4};
views=new ArrayList<View>();
//给iamgeView设置LayoutParams参数
LayoutParams layoutParams=new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
for(int i:imageID){
//不确定1
ImageView imageView=new ImageView(this);
imageView.setImageResource(i);
imageView.setLayoutParams(layoutParams);
views.add(imageView);
}
}
/*
* 初始化页面下方的点
*/
private void initPoint(){
ImageView[] imageView=new ImageView[imageID.length];
for(int i=0;i<linearLayout.getChildCount();i++){
imageView[i]=(ImageView) linearLayout.getChildAt(i);
imageView[i].setImageResource(R.drawable.point_normal);
imageView[i].setOnClickListener(this);
imageView[i].setTag(i);
}
currentPoint=0;
imageView[currentPoint].setImageResource(R.drawable.point_select);
}
/*
* 将页面下方的点全部置为未选中状态
*/
private ImageView[] clearPoint(){
ImageView[] imageView=new ImageView[imageID.length];
for(int i=0;i<linearLayout.getChildCount();i++){
imageView[i]=(ImageView) linearLayout.getChildAt(i);
imageView[i].setImageResource(R.drawable.point_normal);
}
return imageView;
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
/*
* 页面被选中时候执行的方法
* (non-Javadoc)
* @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageSelected(int)
*/
@Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
ImageView[] imageView= clearPoint();
imageView[position].setImageResource(R.drawable.point_select);
}
//小圆点点击事件
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int i=(Integer) v.getTag();
viewPager.setCurrentItem(i);
}
}
fry.ImagePagerAdapter
package fry;
import java.util.ArrayList;
import java.util.List;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
public class ImagePagerAdapter extends PagerAdapter{
private List<View> views;
public ImagePagerAdapter(List<View> views) {
this.views=views;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return this.views.size();
}
/**
* position是在viewPager中显示图片的位置
* 我对应的图片放到对应的位置就好了
* instantiateItem和destroyItem是对应的
* 一个是创建item,一个是销毁item
*/
@Override
public Object instantiateItem(ViewGroup container, int position) {
((ViewPager)container).addView(views.get(position));
return views.get(position);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0==arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager)container).removeView(views.get(position));
}
}
/viewPager/res/layout/activity01.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</android.support.v4.view.ViewPager>
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="bottom|center"
>
<ImageView
android:id="@+id/point1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/point_select"
android:padding="25dip"
/>
<ImageView
android:id="@+id/point2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/point_normal"
android:padding="25dip"
/>
<ImageView
android:id="@+id/point3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/point_normal"
android:padding="25dip"
/>
<ImageView
android:id="@+id/point4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/point_normal"
android:padding="25dip"
/>
</LinearLayout>
</FrameLayout>
1、多个控件(这里指小圆点)可以用List来一起访问
2、可用动态的控件设置tag来区分控件
来源:http://www.cnblogs.com/Renyi-Fan/archive/2017/08/22/7408214.html
标签:ViewPager,引导页
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