recyclerview + OKHttp3 + 拦截器

                                recyclerview + OKHttp3 + 拦截器

1.首先添加依赖

okhttp依赖：

compile 'com.squareup.okhttp3:okhttp:3.9.0'

recyclerview依赖：

compile 'com.android.support:recyclerview-v7:26.0.+'

Gson依赖：

compile 'com.google.code.gson:gson:2.8.1'、
权限：
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

2.布局文件里写控件

<android.support.v7.widget.RecyclerView
    android:id="@+id/recyclerview"
    android:layout_below="@+id/tv"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"></android.support.v7.widget.RecyclerView>
item布局：
<ImageView
    android:scaleType="fitXY"
    android:padding="10dp"
    android:id="@+id/img"
    android:src="@mipmap/ic_launcher"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />
<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tv1"
       android:padding="10dp"
        android:text="成都"
        android:textSize="20sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/tv2"
        android:padding="10dp"
        android:textSize="20sp"
        android:text="赵振_无法长大"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

3.mainActivity类：
public class MainActivity extends AppCompatActivity {
    //"http://bz.budejie.com/?typeid=2&ver=3.4.3&no_cry=1&client=android&c=wallPaper&a=random&bigid=0"
   String path = "http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.billboard.billList&type=1&size=10&offset=0 ";
    List<Bean.SongListBean> list = new ArrayList<>();
    private RecyclerView recyclerview;
      Handler handle = new Handler();
    ViewPager vp;
    List<ImageView>imgs;
    int[] arr = {R.drawable.a1,R.drawable.a2};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        initView();
        //网络数据解析
       initdata();
        initData();

        MyPagerAdapter adapter = new MyPagerAdapter();

        vp.setAdapter(adapter);

    }
    class MyPagerAdapter extends PagerAdapter{

        @Override
        public int getCount() {
            return imgs.size();
        }

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

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

        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            int index = position % imgs.size();

            container.addView(imgs.get(index));

            return imgs.get(index);


        }
    }
//viewpager初始化数据
    private void initData() {
        imgs = new ArrayList<>();
        for (int i = 0;i<arr.length;i++){
            ImageView iv = new ImageView(this);
            iv.setScaleType(ImageView.ScaleType.FIT_XY);
            iv.setImageResource(arr[i]);
            imgs.add(iv);
        }
    }
//okhttp网络解析
    private void initdata() {

        //实例化 
        //拦截器
        OkHttpClient okHttpClient = new OkHttpClient.Builder().addInterceptor((Interceptor) new LoggingInterceptor()).build();
        Request request = new Request.Builder()
                .url(path)
                .build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String result = response.body().string();
                Bean bean = Bean.objectFromData(result);
                list = bean.song_list;
                handle.post(new Runnable() {
                    @Override
                    public void run() {
                        //适配器
                        recyclerview.setAdapter(new MyAdapter(MainActivity.this,list));
                    }
                });
            }
        });

    }
//初始化数据
    private void initView() {
        recyclerview = (RecyclerView) findViewById(R.id.recyclerview);
        vp = (ViewPager) findViewById(R.id.vp);
        //布局管理器
        LinearLayoutManager manager = new LinearLayoutManager(this);
        recyclerview.setLayoutManager(manager);

    }

}
4.Adapter适配器：
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{
        Context context;
    List<Bean.SongListBean> list = new ArrayList<>();
   ImageLoader loader;
    DisplayImageOptions options;

    public MyAdapter(Context context, List<Bean.SongListBean> list) {
        this.context = context;
        this.list = list;
        loader = ImageLoader.getInstance();
        ImageLoaderConfiguration configuration = ImageLoaderConfiguration.createDefault(context);
        loader.init(configuration);
        options = new DisplayImageOptions.Builder()
                .cacheInMemory(true)
                .cacheOnDisk(true)
                .displayer(new FadeInBitmapDisplayer(20))
                .build();
    }

    public void onRefresh() {
    }
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
       View view = View.inflate(context,R.layout.item,null);
        return new MyAdapter.ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
            holder.tv1.setText(list.get(position).album_title);
            holder.tv2.setText(list.get(position).artist_name);
            loader.displayImage(list.get(position).pic_big,holder.img,options);
    }

    @Override
    public int getItemCount() {
        return list==null ? 0 :list.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        ImageView img;
        TextView tv1,tv2;
        public ViewHolder(View itemView) {
            super(itemView);
            img = itemView.findViewById(R.id.img);
            tv1 = itemView.findViewById(R.id.tv1);
            tv2 = itemView.findViewById(R.id.tv2);
        }
    }
}