ViewPager
Posted zqm-sau
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之前我也写过ViewPager的用法(现在忘干净了),复习一遍:
布局activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.v4.view.ViewPager
android:id="@+id/myViewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:overScrollMode="never"/>
</android.support.constraint.ConstraintLayout>
list_view_pager.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/itemImageView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.constraint.ConstraintLayout>
MainActivity:
package com.fitsoft;
import android.graphics.Color;
import android.os.Bundle;
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.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity
ViewPager viewPager;
List<View> list = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = findViewById(R.id.myViewPager);
//添加四个View(颜色不一样)
View view = LayoutInflater.from(this).inflate(R.layout.list_view_pager, null);
ImageView imageView = view.findViewById(R.id.itemImageView);
imageView.setBackgroundColor(Color.RED);
list.add(view);
View view = LayoutInflater.from(this).inflate(R.layout.list_view_pager, null);
ImageView imageView = view.findViewById(R.id.itemImageView);
imageView.setBackgroundColor(Color.GREEN);
list.add(view);
View view = LayoutInflater.from(this).inflate(R.layout.list_view_pager, null);
ImageView imageView = view.findViewById(R.id.itemImageView);
imageView.setBackgroundColor(Color.BLUE);
list.add(view);
View view = LayoutInflater.from(this).inflate(R.layout.list_view_pager, null);
ImageView imageView = view.findViewById(R.id.itemImageView);
imageView.setBackgroundColor(Color.BLACK);
list.add(view);
//设置适配器
viewPager.setAdapter(new PagerAdapter()
@Override
public int getCount()
return list.size();
@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object o)
return view == o;
//初始化方法
@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position)
container.addView(list.get(position));
return list.get(position);
//销毁方法
@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object)
container.removeView(list.get(position));
);
之前写过,不过多介绍,注意ViewPager是在v4包里的。
效果图:
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