阶段二冲刺二

昨天任务

学习了向fragment传递数据

今天任务学习viewpager的简单用法

viewpager是一个滑动页面

 

向相册中图片的滑动主要便是通过viewpager实现

 

package com.example.belowmeue.viewpager;

import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.ViewPager;

import android.os.Bundle;
import android.widget.ImageView;

import com.example.belowmeue.R;
import com.example.belowmeue.adapter.Mviewpageradapter;

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

public class ViewpagertestActivity extends AppCompatActivity {
    private ViewPager mvp;
    private Mviewpageradapter mviewpageradapter;
    private List<ImageView> imageViews;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_viewpagertest);
        mvp = findViewById(R.id.vp);
        initDate();
        mviewpageradapter = new Mviewpageradapter(imageViews);
        mvp.setAdapter(mviewpageradapter);


    }

    private void initDate() {
        ImageView imageView1 = new ImageView(this);
        imageView1.setImageResource(R.drawable.one);

        ImageView imageView2 = new ImageView(this);
        imageView2.setImageResource(R.drawable.two);

        ImageView imageView3 = new ImageView(this);
        imageView3.setImageResource(R.drawable.three);

        imageViews = new ArrayList<>();
        imageViews.add(imageView1);
        imageViews.add(imageView2);
        imageViews.add(imageView3);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".viewpager.ViewpagertestActivity"
    android:orientation="vertical">

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

</LinearLayout>