Question

Android安卓欢迎页和viewpager和Fragment的结合

Android安卓欢迎页和viewpager和Fragment的结合

Answer 1

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

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

    <RadioGroup
        android:id="@+id/rg"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="30dp"
        android:gravity="center"
        android:orientation="horizontal"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true">

        <RadioButton
            android:id="@+id/rb1"
            android:layout_width="10dp"
            android:layout_height="10dp"
            android:background="@drawable/icon"
            android:checked="true"
            android:button="@null" />

        <RadioButton
            android:id="@+id/rb2"
            android:layout_width="10dp"
            android:layout_height="10dp"
            android:background="@drawable/icon"
            android:button="@null" />

        <RadioButton
            android:id="@+id/rb3"
            android:layout_width="10dp"
            android:layout_height="10dp"
            android:background="@drawable/icon"
            android:button="@null" />
    </RadioGroup>
</RelativeLayout>

********************************************************************


package com.example.myapplication;
import android.content.Intent;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioButton;
import android.widget.RadioGroup;

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

public class MainActivity extends AppCompatActivity {
    private ViewPager vp;
    List<View> list=new ArrayList<>();
    RadioGroup rg;
    RadioButton[] rb;
    PageListener listener;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        rg=(RadioGroup)findViewById(R.id.rg);

        //实例化RadioButton的集合
        rb=new RadioButton[rg.getChildCount()];
        for (int i=0;i<rg.getChildCount();i++){
            //从RadioGroup中循环获取RadioButton，并放进数组
            rb[i]=(RadioButton) rg.getChildAt(i);
        }

        vp=(ViewPager)findViewById(R.id.vp);
        list.add(View.inflate(this,R.layout.view1,null));
        list.add(View.inflate(this,R.layout.view2,null));
        list.add(View.inflate(this,R.layout.view3,null));

        MyAdapter adapter=new MyAdapter(list);
        vp.setAdapter(adapter);


        //单选按钮点击事件
        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                for(int i=0;i<rg.getChildCount();i++){
                    //循环，如果当前RadioButton的Id和checkedId相等，就取出索引i
                    if(rb[i].getId()==checkedId){
                        //ViewPager设置当前索引项
                        vp.setCurrentItem(i);
                        break;
                    }
                }
            }
        });

        //vp.setOnPageChangeListener();
        //添加页面改变事件
        listener=new PageListener();
        vp.addOnPageChangeListener(listener);
    }

    public void click(View view) {
        //界面跳转
        Intent intent=new Intent(MainActivity.this,Main2Activity.class);
        startActivity(intent);


    }

    class PageListener implements ViewPager.OnPageChangeListener{
        //页面滑动过程中执行的方法
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }
        //页面滑动完后执行的方法
        @Override
        public void onPageSelected(int position) {
            //页面滑动时，把当前页面对应的索引位置的RadioButton设置为选中状态
            rb[position].setChecked(true);
        }
        //滑动过程中状态改变的方法
        @Override
        public void onPageScrollStateChanged(int state) {

        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        //移除指定的监听事件
        vp.removeOnPageChangeListener(listener);
        //清空所有的页面改变事件
        vp.clearOnPageChangeListeners();
    }
}



*************************************************************************


package com.example.myapplication;

import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

import java.util.List;


/**
 * Created by 猴嫂 on 2017/11/18.
 */

public class MyAdapter extends PagerAdapter {
    List<View> list;

    public MyAdapter(List<View> list) {
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view==object;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        container.addView(list.get(position));
        return list.get(position);
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View)object);
    }
}

*****************************************************************

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bb"
    >

</LinearLayout>
//  如上欢迎页界面 最后一个加按钮跳转


**********************************************************************

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

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

    <RadioGroup
        android:id="@+id/rg"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/rb1"
            android:layout_width="0dp"
            android:layout_height="40dp"
            android:layout_weight="1"
            android:background="@drawable/aa"
            android:button="@null"
            android:gravity="center"
            android:checked="true"
            android:text="消息" />
        <RadioButton
            android:id="@+id/rb2"
            android:layout_width="0dp"
            android:layout_height="40dp"
            android:layout_weight="1"
            android:background="@drawable/aa"
            android:button="@null"
            android:gravity="center"
            android:text="联系人" />
        <RadioButton
            android:id="@+id/rb3"
            android:layout_width="0dp"
            android:layout_height="40dp"
            android:layout_weight="1"
            android:background="@drawable/aa"
            android:button="@null"
            android:gravity="center"
            android:text="动态" />
    </RadioGroup>
</RelativeLayout>

Answer 2

GitHub上有许多框架，可以快速实现，也不想给你讲原理了，给你直接贴个源码。依赖之后马上可以用。
上GitHub.com，搜索框输入WpViewPager，下载，导入项目即可。
使用WpViewPager wp=new WpViewPager();
wp.setByLocalImage().Load().into();快得很。