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
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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;
}
}
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