Android购物分类效果实现

本文实例为大家分享了android购物分类效果展示的具体代码，供大家参考，具体内容如下

secondactivity.java

public class secondactivity extends appcompatactivity{
  private viewpager mpager;
  private radiogroup mradiogroup;

  @override
  protected void oncreate(@nullable bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.second);

     mpager = findviewbyid(r.id.pager);
     mradiogroup = findviewbyid(r.id.group);

     mpager.setadapter(new fragmentpageradapter(getsupportfragmentmanager()) {
       @override
       public fragment getitem(int position) {
         fragment fragment=null;

         switch (position){
           case 0:
             fragment = new afrag();
             break;
           case 1:
             fragment = new bfrag();
             break;
           case 2:
             fragment = new cfrag();
             break;
         }
         return fragment;
       }

       @override
       public int getcount() {
         return 3;
       }
     });

     mradiogroup.setoncheckedchangelistener(new radiogroup.oncheckedchangelistener() {
       @override
       public void oncheckedchanged(radiogroup radiogroup, int i) {
         switch (i){
           case r.id.r1:
             mpager.setcurrentitem(0);
             break;
           case r.id.r2:
             mpager.setcurrentitem(1);
             break;
           case r.id.r3:
             mpager.setcurrentitem(2);
             break;
         }
       }
     });
  }
}

secondactivity.xml

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical">

  <android.support.v4.view.viewpager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="13"/>

  <radiogroup
    android:id="@+id/group"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:orientation="horizontal">

    <radiobutton
      android:id="@+id/r1"
      android:layout_width="wrap_content"
      android:layout_weight="1"
      android:layout_height="match_parent"
      android:button="@null"
      android:gravity="center"
      android:text="首页"/>

    <radiobutton
      android:id="@+id/r2"
      android:layout_width="wrap_content"
      android:layout_weight="1"
      android:layout_height="match_parent"
      android:button="@null"
      android:gravity="center"
      android:text="分类"/>

    <radiobutton
      android:id="@+id/r3"
      android:layout_width="wrap_content"
      android:layout_weight="1"
      android:layout_height="match_parent"
      android:button="@null"
      android:gravity="center"
      android:text="购物车"/>
  </radiogroup>
</linearlayout>

afrag.java

public class afrag extends fragment{
  private recyclerview mrecyclerview;
  public string urlstring="http://www.wanandroid.com/tools/mockapi/6523/restaurants_offset_0_limit_4 ";

  @nullable
  @override
  public view oncreateview(@nonnull layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {
    view view = view.inflate(getactivity(), r.layout.afrag, null);
    mrecyclerview = view.findviewbyid(r.id.rv);
    initdata();

    return view;
  }

  private void initdata() {
    okhttps okhttps = okhttps.getinstance();

    okhttps.doget(urlstring, new okhttps.okcallback() {
      @override
      public void onresponse(string json) { //瀑布流

        pububean pububean = new gson().fromjson(json,pububean.class);
        list<pububean.databean> results = pububean.getdata();

        pubuadapter pubuadapter = new pubuadapter(getactivity());
        pubuadapter.setdatas(results);
        mrecyclerview.setadapter(pubuadapter);

        staggeredgridlayoutmanager manager = new staggeredgridlayoutmanager(2, staggeredgridlayoutmanager.vertical);
        mrecyclerview.setlayoutmanager(manager);
      }

      @override
      public void onfailure(exception e) {

      }
    });

  }
}

afrag.xml

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <android.support.v7.widget.recyclerview
    android:id="@+id/rv"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

</linearlayout>

pubuadapter.java

public class pubuadapter extends recyclerview.adapter<pubuadapter.viewholder>{
  private context mcontext;
  arraylist<pububean.databean> list;

  public pubuadapter(context context) {
    mcontext = context;
    list = new arraylist<>();
  }

  public void setdatas(list<pububean.databean> datas) {
    list.addall(datas);

  }
  @nonnull
  @override
  public viewholder oncreateviewholder(@nonnull viewgroup parent, int viewtype) {
    view view = view.inflate(mcontext, r.layout.pbitem, null);
    viewholder holder = new viewholder(view);
    return holder;
  }

  @override
  public void onbindviewholder(@nonnull viewholder holder, int position) {

    holder.mtextview.settext(list.get(position).getname());
    glide.with(mcontext).load(list.get(position).getpic_url()).into(holder.mimageview);


  }

  @override
  public int getitemcount() {
    return list.size();
  }



  public class viewholder extends recyclerview.viewholder {
    imageview mimageview;
    textview mtextview;
    public viewholder(view itemview) {
      super(itemview);
      mimageview = itemview.findviewbyid(r.id.image);
      mtextview = itemview.findviewbyid(r.id.t1);

    }
  }
}

bfrag.java

public class bfrag extends fragment{
  private recyclerview mrecyclerview;
  leftadapter adapter;
  string urlstring="http://www.zhaoapi.cn/product/getcatagory";
  string urlstring2="http://www.zhaoapi.cn/product/getproductcatagory";
  private recyclerview mrecyclerview2;

  @nullable
  @override
  public view oncreateview(@nonnull layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {
    view view = view.inflate(getactivity(), r.layout.bfrag, null);//分类页面

    mrecyclerview = view.findviewbyid(r.id.rv1); //左侧列表

    mrecyclerview2 = view.findviewbyid(r.id.rv2); //右
    initdata();

    return view;
  }

  private void initdata() {
    okhttps okhttps = okhttps.getinstance();

    okhttps.doget(urlstring, new okhttps.okcallback() {
      @override
      public void onresponse(string json) { //瀑布流

        leftbean leftbean = new gson().fromjson(json,leftbean.class);
        list<leftbean.databean> results = leftbean.getdata();

        adapter = new leftadapter(getactivity());
        adapter.setdatas(results);

        mrecyclerview.setadapter(adapter);


        mrecyclerview.setlayoutmanager(new linearlayoutmanager(getactivity(),linearlayoutmanager.vertical,false));

        adapter.setonitemclicklistener(new leftadapter.onitemclicklistener() {
          @override
          public void onitemclick(int position) {

            //toast.maketext(getactivity(),position+"",toast.length_short).show();
            rigth(position);
          }
        });
      }

      @override
      public void onfailure(exception e) {

      }
    });
  }

  public void rigth(int position){
    hashmap<string, string> map = new hashmap<>();
    map.put("cid",position+1+"");

    okhttps.getinstance().dopost(urlstring2,map,new okhttps.okcallback() {
      @override
      public void onresponse(string json) {

        rightbean rightbean = new gson().fromjson(json,rightbean.class);
        list<rightbean.databean> results = rightbean.getdata();

        rightadapter rightadapter = new rightadapter(getactivity());
        rightadapter.setdatas(results);

        mrecyclerview2.setadapter(rightadapter);

        mrecyclerview2.setlayoutmanager(new gridlayoutmanager(getactivity(),3));
      }

      @override
      public void onfailure(exception e) {

      }
    });
  }
}

bfrag.xml

<android.support.v7.widget.recyclerview
    android:id="@+id/rv1"
    android:layout_width="0dp"
    android:layout_weight="2"
    android:layout_height="match_parent"/>

  <android.support.v7.widget.recyclerview
    android:id="@+id/rv2"
    android:layout_width="0dp"
    android:layout_weight="10"
    android:layout_height="match_parent"/>

</linearlayout>

leftadapter.java

public class leftadapter extends recyclerview.adapter<leftadapter.viewholder>{
  private context mcontext;
  arraylist<leftbean.databean> list;

  public leftadapter(context context) {
    mcontext = context;
    list = new arraylist<>();
  }

  public void setdatas(list<leftbean.databean> datas) {
    list.addall(datas);

  }

  public interface onitemclicklistener{  //自定义接口回调设置点击事件
    void onitemclick(int position);
  }

  private onitemclicklistener monitemclicklistener;

  public void setonitemclicklistener(onitemclicklistener onitemclicklistener){
    monitemclicklistener=onitemclicklistener;
  }

  @nonnull
  @override
  public viewholder oncreateviewholder(@nonnull viewgroup parent, int viewtype) {
    view view = view.inflate(mcontext, r.layout.leftitem, null);
    viewholder holder = new viewholder(view);
    return holder;
  }

  @override
  public void onbindviewholder(@nonnull final viewholder holder, int position) {

    holder.mtextview.settext(list.get(position).getname());

    holder.itemview.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view view) {
        int position1 = holder.getlayoutposition();
        monitemclicklistener.onitemclick(position1);
      }
    });
  }

  @override
  public int getitemcount() {
    return list.size();
  }



  public class viewholder extends recyclerview.viewholder {
    textview mtextview;
    public viewholder(view itemview) {
      super(itemview);
      mtextview = itemview.findviewbyid(r.id.text1);

    }
  }
}

rightadapter.java

public class rightadapter extends recyclerview.adapter<rightadapter.viewholder>{
  private context mcontext;
  arraylist<rightbean.databean> list;

  public rightadapter(context context) {
    mcontext = context;
    list = new arraylist<>();
  }

  public void setdatas(list<rightbean.databean> datas) {
    list.addall(datas);

  }
  @nonnull
  @override
  public viewholder oncreateviewholder(@nonnull viewgroup parent, int viewtype) {
    view view = view.inflate(mcontext, r.layout.rightitem, null);
    viewholder holder = new viewholder(view);
    return holder;
  }

  @override
  public void onbindviewholder(@nonnull viewholder holder, int position) {
    holder.mtextview.settext(list.get(position).getname());
    glide.with(mcontext).load(list.get(position).getlist().get(position).geticon()).into(holder.mimageview);
  }

  @override
  public int getitemcount() {
    return list.size();
  }



  public class viewholder extends recyclerview.viewholder {
    imageview mimageview;
    textview mtextview;

    public viewholder(view itemview) {
      super(itemview);
      mimageview = itemview.findviewbyid(r.id.image1);
      mtextview = itemview.findviewbyid(r.id.text2);

    }
  }
}

okhttps.java

public class okhttps {
  handler handler;
  private final okhttpclient mokhttpclient;
  private static okhttps mokhttps;

  private okhttps() {
    handler = new handler(looper.getmainlooper());

    logginginterceptor logginginterceptor = new logginginterceptor(); //日志拦截器
    mokhttpclient = new okhttpclient.builder()
        .addinterceptor(logginginterceptor)  //设置日志拦截器
        .connecttimeout(5000, timeunit.milliseconds)
        .readtimeout(5000,timeunit.milliseconds)
        .writetimeout(5000,timeunit.milliseconds)
        .build();

  }

  public static okhttps getinstance(){
    if (mokhttps==null){
      synchronized (okhttps.class){
        if (mokhttps==null){
          return mokhttps=new okhttps();
        }
      }
    }
    return mokhttps;
  }

  public interface okcallback{
    void onresponse(string json);

    void onfailure(exception e);

  }

  public void dopost(string url, map<string,string> map, final okcallback okcallback){
    formbody.builder builder = new formbody.builder();
    if (map!=null){
      for (string key:map.keyset()){
        builder.add(key,map.get(key));
      }
    }

    formbody formbody = builder.build();

    final request request = new request.builder()
        .post(formbody)
        .url(url)
        .build();

    call call = mokhttpclient.newcall(request);
    call.enqueue(new callback() {
      @override
      public void onfailure(call call, final ioexception e) {
        if (okcallback!=null){
          handler.post(new runnable() {
            @override
            public void run() {

              okcallback.onfailure(e);
            }
          });
        }
      }

      @override
      public void onresponse(call call, response response) throws ioexception {

        try {
          if (response!=null && response.issuccessful()){
            final string json = response.body().string();
            handler.post(new runnable() {
              @override
              public void run() {
                if (okcallback!=null){

                  okcallback.onresponse(json);
                  return;
                }
              }
            });
          }
        }catch (ioexception e){
          e.printstacktrace();
        }
        if (okcallback!=null){
          okcallback.onfailure(new exception("网络异常"));
        }
      }
    });

  }
  public void doget(string url, final okcallback okcallback){
    request request = new request.builder()
        .url(url)
        .build();

    call call = mokhttpclient.newcall(request);
    call.enqueue(new callback() {
      @override
      public void onfailure(call call, final ioexception e) {
        if (okcallback != null) {
          //切换到主线程
          handler.post(new runnable() {
            @override
            public void run() {
              okcallback.onfailure(e);
            }
          });
        }
      }

      @override
      public void onresponse(call call, response response) throws ioexception {

        try {
          if (response != null && response.issuccessful()) {
            final string json = response.body().string();
            handler.post(new runnable() {
              @override
              public void run() {
                if (okcallback != null) {
                  okcallback.onresponse(json);
                }

              }
            });
          }
        } catch (ioexception e) {
          e.printstacktrace();
        }
      }
    });
  }
}

依赖

implementation 'com.google.code.gson:gson:2.8.5'
  implementation 'com.squareup.okhttp3:okhttp:3.12.0'
  implementation 'com.android.support:recyclerview-v7:27.1.1'
  implementation 'com.github.bumptech.glide:glide:3.7.0'

logginginterceptor.java //拦截器

class logginginterceptor implements interceptor {
 @override
 public response intercept(chain chain) throws ioexception {
  //拿到request对象
  request request = chain.request();

  long t1 = system.nanotime();
  system.out.println(" request = " + string.format("sending request %s on %s%n%s",
      request.url(), chain.connection(), request.headers()));

  //拿到response对象
  response response = chain.proceed(request);

  long t2 = system.nanotime();
  //得出请求网络,到得到结果,中间消耗了多长时间
  system.out.println("response " + string.format("received response for %s in %.1fms%n%s",
      response.request().url(), (t2 - t1) / 1e6d, response.headers()));
  return response;
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。