安卓笔记——轮播图

Posted 2021-06-01 _23_

步骤

1、新建一个项目，引入依赖包

 implementation 'com.youth.banner:banner:2.1.0'
 implementation 'com.github.bumptech.glide:glide:4.12.0'

2、构造实体，放入列表

3、写入逻辑

package com.hnucm.c201901020110;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.resource.bitmap.RoundedCorners;
import com.bumptech.glide.request.RequestOptions;
import com.youth.banner.Banner;
import com.youth.banner.adapter.BannerImageAdapter;
import com.youth.banner.holder.BannerImageHolder;
import com.youth.banner.indicator.CircleIndicator;

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

public class MainActivity extends AppCompatActivity {
    Banner banner;
    List<String> stringList = new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        banner = findViewById(R.id.banner);

        stringList.add("https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/zhidao/pic/item/a6efce1b9d16fdfabf36882ab08f8c5495ee7b9f.jpg");
        stringList.add("https://ss3.baidu.com/9fo3dSag_xI4khGko9WTAnF6hhy/zhidao/pic/item/0824ab18972bd40797d8db1179899e510fb3093a.jpg");
        stringList.add("https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2647888545,3751969263&fm=224&gp=0.jpg");

        banner.setAdapter(new BannerImageAdapter<String>(stringList) {
            @Override
            public void onBindView(BannerImageHolder holder, String data, int position, int size) {
                Glide.with(holder.itemView)
                        .load(data)
                        .apply(RequestOptions.bitmapTransform(new RoundedCorners(30)))
                        .into(holder.imageView);
            }
        });
        banner.setIndicator(new CircleIndicator(this));
    }
}

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