Android banner的使用详解与示例

目录

• 效果图：
• 添加依赖
• 添加权限到你的 AndroidManifest.xml
• 布局文件
• 逻辑代码
• 常见的一些属性设置

• 方法
• Attributes属性

  implementation 'com.youth.banner:banner:2.1.0'

<!-- if you want to load images from the internet -->
<uses-permission android:name="android.permission.INTERNET" /> 

<com.youth.banner.Banner
        android:id="@+id/banner"
        android:layout_width="0dp"
        android:layout_height="250dp"
        android:layout_margin="10dp"
        app:banner_radius="20dp"    // 圆角
        android:clickable="true"   //  是否可点击
        app:banner_indicator_selected_color="#95F2EC"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.157"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

package com.hnucm.xiaotang;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
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 com.youth.banner.listener.OnBannerListener;
import org.json.JSONArray;
import org.json.JSONException;
import org.xutils.common.Callback;
import org.xutils.http.RequestParams;
import org.xutils.x;
import java.util.ArrayList;
import java.util.List;
public class ShouYeFragment extends Fragment implements OnBannerListener {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View inflate = inflater.inflate(R.layout.fragment_shou_ye, container, false);
        Banner banner =inflate.findViewById(R.id.banner);
        List<String> imgList = new ArrayList<>();
        x.Ext.init(getActivity().getApplication());
        x.Ext.setDebug(BuildConfig.DEBUG);  // 是否输出debug日志, 开启debug会影响性能.
        x.view().inject(getActivity());  //没有用到view注解可以先不用
        imgList.add("https://cdn.jsdelivr.net/gh/Yqifei/Blog-Image@master/20211026/image.6719h9mvs700.png");
        imgList.add("https://cdn.jsdelivr.net/gh/Yqifei/Blog-Image@master/20211031/800-(11).2txrpbqztva0.jpg");
        imgList.add("https://cdn.jsdelivr.net/gh/Yqifei/Blog-Image@master/20211031/800-(5).5s6zwxy19v40.jpg");
        imgList.add("https://cdn.jsdelivr.net/gh/Yqifei/Blog-Image@master/20211031/800-(10).24p8puxcmqbk.jpg");
        imgList.add("https://cdn.jsdelivr.net/gh/Yqifei/Blog-Image@master/20211031/800-(14).pizaxijh534.jpg");
        RequestParams params = new RequestParams("https://www.fastmock.site/mock/08392ee207964eb010bf22b157103494/androidJavaEE/banner");
        x.http().get(params, new Callback.CommonCallback<String>() {
            @Override
            public void onSuccess(String result) {
                try {
                    JSONArray jsonArray = new JSONArray(result);
                    for (int i=0;i<jsonArray.length();i++){
                        imgList.add((String)jsonArray.get(i));
                    }
                    banner.setDatas(imgList);    //  动态更新banner数据
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            @Override
            public void onError(Throwable ex, boolean isOnCallback) {
            }
            @Override
            public void onCancelled(CancelledException cex) {
            }
            @Override
            public void onFinished() {
            }
        });
        banner.setAdapter(new BannerImageAdapter<String>(imgList) {
            @Override
            public void onBindView(BannerImageHolder holder, String data, int position, int size) {
                System.out.println("hello TEST");
                Glide.with(holder.itemView)
                        .load(data)
                        .apply(RequestOptions.bitmapTransform(new RoundedCorners(30)))
                        .into(holder.imageView);
            }
        }).setIndicator(new 				                      CircleIndicator(getContext())).setLoopTime(1000).setOnBannerListener(this);
        //  设置圆形指示点，设置循环时间，设置监听器
        return inflate;
    }
    @Override
    public void OnBannerClick(Object data, int position) {   //  监听每一个图片的点击事件
        Log.i("tag", "你点了第"+position+"张轮播图");
    }
}