UI高级_引导页

xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".MainActivity">

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

    <Button
        android:id="@+id/jin"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="点击进入"
        android:layout_centerInParent="true"/>

</RelativeLayout>

MainAcitivty基类：https://blog.csdn.net/qq_43797842/article/details/86233215
MainAcitivty

import android.content.Intent;
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.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;

import com.home.homework1.base.BaseActivity;

import java.util.ArrayList;
/**
 * @Auther: 努力
 * @Date: 2019/1/19 11:37:${卢文杰}
 * @Description:
 */
public class MainActivity extends BaseActivity {


    private ViewPager viewPager;
    private Button tiaozhuan;
    //数据 引导页的图片
    private ArrayList<ImageView> img = new ArrayList<>();

    @Override
    protected int bindLayout() {
        return R.layout.activity_main;
    }

    @Override
    protected void initView() {
        //找控件
        viewPager = bindView(R.id.viewPager);
        //按钮
        tiaozhuan = bindView(R.id.jin);
    }

    @Override
    protected void initData() {
        //隐藏按钮
        tiaozhuan.setVisibility(View.GONE);

        //创建数组  把图片放进数组
        int arr[] = {
                R.drawable.m1,
                R.drawable.m2,
                R.drawable.m3,
                R.drawable.m4
        };
        for (int i = 0;i<arr.length;i++){
            ImageView imageView = new ImageView(MainActivity.this);
            imageView.setImageResource(arr[i]);
            img.add(imageView);

        }
        //适配器
        viewPager.setAdapter(new PagerAdapter() {
            @Override
            public int getCount() {
                return img.size();
            }

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

            @NonNull
            @Override
            public Object instantiateItem(@NonNull ViewGroup container, int position) {
                ImageView imageView = img.get(position);
                container.addView(imageView);
                return imageView;
            }

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

    }

    @Override
    protected void bindEvent() {
        //页面滑动事件
        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int i, float v, int i1) {

            }

            @Override
            public void onPageSelected(int i) {
                if (i==img.size()-1) {
                    tiaozhuan.setVisibility(View.VISIBLE);
                } else {
                    tiaozhuan.setVisibility(View.GONE);
                }
            }

            @Override
            public void onPageScrollStateChanged(int i) {

            }
        });
        //点击跳转事件
        tiaozhuan.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,ShowActivity.class);
                startActivity(intent);
                //完成页面 返回桌面
                finish();
            }
        });
    }
}