使用Banner,滑到最后一页显示按钮

使用Banner,滑到最后一页显示按钮

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一、banner是什么？

banner是一个可以代替ViewPager的控件。

二、使用步骤

1.引入库

代码如下（示例）：

 compile 'com.youth.banner:banner:1.4.9' 这是Banner的依赖 

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总结

提示：我这里是使用的banner 1.4.9

activity_splash.xml布局

<?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"
   >
    <com.youth.banner.Banner
        android:id="@+id/banner"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <Button
            android:id="@+id/settings"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:visibility="gone"
            android:layout_gravity="center"
            android:text="网路设置" />
        <Button
            android:id="@+id/go_home"
            android:visibility="gone"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="50dp"
            android:text="进入主页" />
    </com.youth.banner.Banner>
</LinearLayout>

SplashActivity里面的代码

package com.example.smartcity.activity;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

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

import com.bumptech.glide.Glide;
import com.example.smartcity.MainActivity;
import com.example.smartcity.R;
import com.youth.banner.Banner;
import com.youth.banner.BannerConfig;
import com.youth.banner.loader.ImageLoader;

import java.util.ArrayList;
import java.util.List;
import java.util.zip.GZIPOutputStream;

/**
 * 引导页
 */
public class SplashActivity extends AppCompatActivity implements View.OnClickListener {

    private Button settings;
    private Button go_home;
    private Banner banner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        getSupportActionBar().hide();
        initView();
        List list = new ArrayList();
        list.add(R.drawable.smartcity1);
        list.add(R.drawable.smartcity2);
        list.add(R.drawable.smartcity3);
        list.add(R.drawable.smartcity4);
        list.add(R.drawable.smartcity5);
        banner.setBannerStyle(BannerConfig.NUM_INDICATOR);
        banner.setImages(list);
        banner.setDelayTime(99999999);
        banner.setImageLoader(new ImageLoader() {
            @Override
            public void displayImage(Context context, Object o, ImageView imageView) {

                Glide.with(SplashActivity.this).load(o).into(imageView);
            }
        });

        //banner设置页面改变的监听
        banner.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            }

            @Override
            public void onPageSelected(int position) {
                if (list.size()-1 == position){
                    //如果到了最后一页，就显示按钮
                    settings.setVisibility(View.VISIBLE);
                    go_home.setVisibility(View.VISIBLE);
                }else {
                    settings.setVisibility(View.GONE);
                    go_home.setVisibility(View.GONE);
                }
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

        banner.start();
    }

    private void initView() {
        settings = (Button) findViewById(R.id.settings);
        go_home = (Button) findViewById(R.id.go_home);
        banner = (Banner) findViewById(R.id.banner);

        settings.setOnClickListener(this);
        go_home.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.settings:


                break;
            case R.id.go_home:
                startActivity(new Intent(this, MainActivity.class));
                finish();

                break;
        }
    }

}