ViewPager翻页控件简单使用方法

例子布局文件：

主activity布局文件：activity_view_pager.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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=".ViewPagerActivity">
    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:overScrollMode="never"
        >
    </android.support.v4.view.ViewPager>


</android.support.constraint.ConstraintLayout>


viewpager子项布局文件：layout_viewpager.xml:

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

</LinearLayout>

例子源代码：

package com.example.viewpager;

import android.graphics.Color;
import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

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

public class ViewPagerActivity extends AppCompatActivity {
    ViewPager viewpager;

    List<View> listview ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_view_pager);
        viewpager = findViewById(R.id.view_pager);

        listview = new ArrayList<>();
        for(int i=0;i<3;i++){

            View view = LayoutInflater.from(this).inflate(R.layout.layout_viewpager,null);
            ImageView imageView=  view.findViewById(R.id.image_view);

            switch(i){
                case 0:
                    imageView.setBackgroundColor(Color.RED);
                    break;
                case 1:
                    imageView.setBackgroundColor(Color.GREEN);
                    break;
                case 2:
                    imageView.setBackgroundColor(Color.BLUE);
                    break;

            }
            listview.add(view);

        }
        viewpager.setAdapter(new PagerAdapter() {
            @Override
            public int getCount() {
                return listview.size();
            }

            @Override
            public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
                return view ==  o;
//                return false;
            }

            @NonNull
            @Override
            public Object instantiateItem(@NonNull ViewGroup container, int position) {
                container.addView(listview.get(position));
                return listview.get(position);
//                return super.instantiateItem(container, position);
            }

            @Override
            public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
//                super.destroyItem(container, position, object);
                container.removeView(listview.get(position));
            }
        });

    }
}