package com.example.androidtvdemo.demo04;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import androidx.leanback.widget.Presenter;

import com.bumptech.glide.Glide;
import com.example.androidtvdemo.R;
import com.example.androidtvdemo.net.BlogArticle;

public class BlogArticlePresenter extends Presenter {

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent) {
        View inflate = LayoutInflater.from(parent.getContext()).
                inflate(R.layout.item_blog_article, parent, false);
        return new Holder(inflate);
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, Object item) {
        Holder holder = (Holder) viewHolder;
        if (item instanceof BlogArticle.DataBean.ContentBean) {
            Log.i("->>", "onBindViewHolder: 加载数据");
            //holder.mTextView.setText((String) item);
            BlogArticle.DataBean.ContentBean data = (BlogArticle.DataBean.ContentBean) item;
            Glide.with(((Holder) viewHolder).mImageView.getContext())
                    .load("http://8.129.19.172:2020/portal/image/" +
                            ((BlogArticle.DataBean.ContentBean) item).getCover())
                    .into(holder.mImageView);
        }else {
            Log.i("->>", "onBindViewHolder: 数据不对");
        }
    }

    @Override
    public void onUnbindViewHolder(ViewHolder viewHolder) {

    }

    public static class Holder extends ViewHolder {
        private ImageView mImageView;

        public Holder(View view) {
            super(view);
            mImageView = view.findViewById(R.id.iv_article_cover);
        }
    }
}

package com.example.androidtvdemo.demo04;

import android.os.Bundle;
import android.util.Log;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentActivity;
import androidx.leanback.widget.ArrayObjectAdapter;
import androidx.leanback.widget.FocusHighlight;
import androidx.leanback.widget.FocusHighlightHelper;
import androidx.leanback.widget.ItemBridgeAdapter;

import com.example.androidtvdemo.BuildConfig;
import com.example.androidtvdemo.databinding.ActivityDemo04Binding;
import com.example.androidtvdemo.net.BlogArticle;
import com.example.androidtvdemo.net.HttpManager;
import com.example.androidtvdemo.net.IappService;

import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class Demo04Activity extends FragmentActivity {

    private ActivityDemo04Binding mVb;
    private ArrayObjectAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mVb = ActivityDemo04Binding.inflate(getLayoutInflater());
        setContentView(mVb.getRoot());
        mVb.vgv.setNumColumns(4);
        //初始化列表需要的adapter
        mAdapter = new ArrayObjectAdapter(new BlogArticlePresenter());
        ItemBridgeAdapter iba = new ItemBridgeAdapter(mAdapter);
        mVb.vgv.setAdapter(iba);
        //选中放大效果增加这个代码,flat中有放大比例
        FocusHighlightHelper.setupBrowseItemFocusHighlight(iba, FocusHighlight.ZOOM_FACTOR_MEDIUM, false);
        //请求博客文章数据
        IappService service = HttpManager.getService(IappService.class, BuildConfig.APP_BASE_URL);
        service.getArticle().enqueue(new Callback<BlogArticle>() {
            @Override
            public void onResponse(Call<BlogArticle> call, Response<BlogArticle> response) {
                //数据获取成功之后,显示图片数据
                Log.i("->>", "onResponse: 获取数据成功");
                List<BlogArticle.DataBean.ContentBean> content = response.body().getData().getContent();
                //更新数据
                mAdapter.setItems(content, null);
            }

            @Override
            public void onFailure(Call<BlogArticle> call, Throwable t) {
                t.printStackTrace();
            }
        });
    }
}