Android使用ViewPager实现启动引导页效果

本文实例为大家分享了android实现启动引导页效果的具体代码，供大家参考，具体内容如下

viewpagertwoactivity.java

package cn.edu.zufe.app001;

import androidx.annotation.nonnull;
import androidx.appcompat.app.appcompatactivity;
import androidx.viewpager.widget.pageradapter;
import androidx.viewpager.widget.viewpager;

import android.content.context;
import android.os.bundle;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.button;
import android.widget.imageview;
import android.widget.radiobutton;
import android.widget.radiogroup;
import android.widget.toast;

import java.util.arraylist;

public class viewpagertwoactivity extends appcompatactivity {

    private int[] launchimagearray = new int[]{
            r.drawable.guide_bg1,r.drawable.guide_bg2,r.drawable.guide_bg3,r.drawable.guide_bg4
    };
    @override
    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        setcontentview(r.layout.activity_view_pager_two);
        viewpager vp_launch = (viewpager)findviewbyid(r.id.vp_launch);
        launchsimpleadapter adapter = new launchsimpleadapter(this,launchimagearray);
        vp_launch.setadapter(adapter);
        vp_launch.setcurrentitem(0);
    }

    class launchsimpleadapter extends pageradapter{
        private context mcontext;
        private arraylist<view> mviewlist = new arraylist<view>();
        public launchsimpleadapter(final context context, int[] imagearray){
            mcontext = context;
            for(int i=0; i<imagearray.length; i++){
                view view = layoutinflater.from(context).inflate(r.layout.item_launch,null);
                imageview iv_launcher = (imageview)view.findviewbyid(r.id.iv_launch);
                radiogroup rg_indicate = (radiogroup)view.findviewbyid(r.id.rg_indicate);
                button btn_start = (button)view.findviewbyid(r.id.btn_start);
                iv_launcher.setimageresource(imagearray[i]);
                for(int j=0; j<imagearray.length; j++){
                    radiobutton radio = new radiobutton(mcontext);
                    radio.setlayoutparams(new viewgroup.layoutparams(viewgroup.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content));
                    radio.setbuttondrawable(r.drawable.launch_guide);
                    radio.setpadding(10,10,10,10);
                    rg_indicate.addview(radio);
                }
                ((radiobutton)rg_indicate.getchildat(i)).setchecked(true);
                if (i == imagearray.length-1) {
                    btn_start.setvisibility(view.visible);
                    btn_start.setonclicklistener(new view.onclicklistener() {
                        @override
                        public void onclick(view v) {
                            toast.maketext(context,"欢迎您开启美好生活",toast.length_short).show();
                        }
                    });
                }
                mviewlist.add(view);
            }
        }

        @override
        public void destroyitem(@nonnull viewgroup container, int position, @nonnull object object) {
            container.removeview(mviewlist.get(position));
        }

        @nonnull
        @override
        public object instantiateitem(@nonnull viewgroup container, int position) {
            container.addview(mviewlist.get(position));
            return mviewlist.get(position);
        }

        @override
        public int getcount() {
            return mviewlist.size();
        }

        @override
        public boolean isviewfromobject(@nonnull view view, @nonnull object o) {
            return view == o;
        }
    }
}

activity_view_pager_two.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.constraintlayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="cn.edu.zufe.app001.viewpagertwoactivity">

    <androidx.viewpager.widget.viewpager
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/vp_launch">
    </androidx.viewpager.widget.viewpager>
</androidx.constraintlayout.widget.constraintlayout>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。