本系列即将完结,整理一下每个小章节,希望入门的学习者能看懂,并且帮助到你,其他勿cue,这只是一个简单的app小demo~
总体,实现服务端服务端功能的数据解析,处理RecyclerView中item子项的点击事件并实现跳转到对应的服务页面,接来下看代码吧~
一、【Android项目实战 | 从零开始写app(一)】 创建项目
二、【Android项目实战 | 从零开始写app(二)】实现闪屏页,启动app
三、【Android项目实战 | 从零开始写app(三)】实现引导页,进入登录or主页面
四、【Android项目实战 | 从零开始写app(四)】Okhttp+Gson实现服务端登录验证功能
五、【Android项目实战 | 从零开始写app(五)】okhttp+gson实现服务端注册功能
六、【Android项目实战 | 从零开始写app(六)】用TabLayout+ViewPager搭建App 框架主页面底部导航栏
七、【Android项目实战 | 从零开始写app(七)】优化主页导航栏,禁用主页页面滑动切换效果
八、【Android项目实战 | 从零开始写app(八)】实现app首页广告轮播图切换和搜索跳转
九、【Android项目实战 | 从零开始写app(九)】Tablayout+ViewPager实现页面分类顶部标题页面联动切换
十、【Android项目实战 | 从零开始写app(十)】Okhttp+glide+json+ListView实现新闻模块数据的填充显示
十一、【Android项目实战 | 从零开始写app(十一)】实现app首页智慧服务页面服务分类数据的解析及点击跳转
十二、【Android项目实战 | 从零开始写app(十二)】实现app首页智慧服务&热门推荐&热门主题、新闻
十三、【Android项目实战 | 从零开始写app(十三)】实现用户中心模块清除token退出登录&信息修改等功能
十四、【Android项目实战 | 从零开始写app(十四)】实现图片发布模块 | 必知必会之调用系统相机拍照、相册
十五、【Android项目实战 | 从零开始写app(教程汇总)】Android 项目实战系列汇总、源代码
package com.example.smartcity.activity;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.example.smartcity.R;
import com.example.smartcity.adapter.RecycleServiceAdapter;
import com.example.smartcity.bean.ServiceBean;
import com.example.smartcity.utils.APIConfig;
import com.google.gson.Gson;
import java.io.IOException;
import java.util.List;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class ServiceActivity extends AppCompatActivity {
private RecyclerView service_recyclerview;
private RecycleServiceAdapter adapter;
private List<ServiceBean.RowsBean> rowsBeanList;
@SuppressLint("HandlerLeak")
private Handler handler = new Handler() {
@Override
public void handleMessage(@NonNull Message msg) {
super.handleMessage(msg);
if (msg.what==0) {
ServiceBean serviceBean = (ServiceBean) msg.obj;
rowsBeanList = serviceBean.getRows();
// 实例化adapter
adapter= new RecycleServiceAdapter(ServiceActivity.this,rowsBeanList);
// 设置布局管理器
service_recyclerview.setLayoutManager(new GridLayoutManager(ServiceActivity.this,5));
// 设置适配器
service_recyclerview.setAdapter(adapter);
// 设置item点击跳转事件 分别到对应的页面,在Intent中可以自己创建跳转的activity
adapter.setItemClickListener(new RecycleServiceAdapter.MyItemClickListener() {
@Override
public void onItemClick(View view, int position) {
String url = APIConfig.BASE_URL+"/"+rowsBeanList.get(position).getLink();
Intent intent = null;
if (position==0){
intent = new Intent(ServiceActivity.this, CityStateActivity.class);
} else if (position==1) {
intent = new Intent(ServiceActivity.this, BusActivity.class);
} else if (position==2) {
intent = new Intent(ServiceActivity.this, ApponitmentActivity.class);
} else if (position==3) {
intent = new Intent(ServiceActivity.this, LivingPayActivity.class);
} else if (position==4) {
intent = new Intent(ServiceActivity.this, WeiZhangActivity.class);
} else if (position==5) {
intent = new Intent(ServiceActivity.this, ParkActivity.class);
}
Bundle bundle = new Bundle();
bundle.putString("title",rowsBeanList.get(position).getServiceName());
bundle.putString("url",url);
intent.putExtras(bundle);
startActivity(intent);
}
});
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_service);
service_recyclerview = findViewById(R.id.service_recyclerview);
getServiceData();
}
// 请求全部服务
private void getServiceData() {
// 创建OkHttpClient对象
OkHttpClient client = new OkHttpClient();
// 创建 Request对象
Request request = new Request.Builder()
.url(APIConfig.BASE_URL+"/service/service/list")
.build();
try {
// 回调
Call call = client.newCall(request);
// 异步请求
call.enqueue(new okhttp3.Callback() {
@Override
// 请求失败
public void onFailure(Call call, IOException e) {
Log.i("onFailure",e.getMessage());
}
// 响应成功
@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
final String result = response.body().string();
// runOnUiThread()用于更新UI
runOnUiThread(new Runnable() {
@Override
public void run() {
Gson gson = new Gson();
ServiceBean serviceBean = gson.fromJson(result,ServiceBean.class);
Message msg = new Message();
msg.what=0;
msg.obj=serviceBean;
handler.sendMessage(msg);
}
});
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".activity.ServiceActivity">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#B5D6F1"
android:layout_margin="10dp"
android:padding="10dp"
android:id="@+id/service_recyclerview"/>
LinearLayout>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:orientation="vertical"
android:layout_weight="1"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:layout_height="wrap_content">
<ImageView
android:background="@drawable/category_shape"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:id="@+id/service_img"
android:src="@mipmap/ic_launcher"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:id="@+id/service_name"
android:textSize="20sp"
android:textColor="#131313"
android:layout_gravity="center"
android:text="智慧出行"
/>
LinearLayout>
package com.example.smartcity.adapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import com.example.smartcity.R;
import com.example.smartcity.bean.ServiceBean;
import com.example.smartcity.utils.APIConfig;
import java.util.List;
/**
* @ProjectName: smartcity
* @Package: com.example.smartcity.adapter
* @ClassName: RecycleServiceAdapter
* @Description: RecyclerView 全部服务适配器
* @Author: liyingxia
* @CreateDate: 2021/3/31 21:28
*/
public class RecycleServiceAdapter extends RecyclerView.Adapter<RecycleServiceAdapter.MyViewHolder> {
private LayoutInflater layoutInflater;
private List<ServiceBean.RowsBean> rowsBeans;
private Context context;
private MyItemClickListener mItemClickListener;
/**
* 构造方法 传入参数
* @param context
* @param rowsBeans
*/
public RecycleServiceAdapter(Context context,List<ServiceBean.RowsBean> rowsBeans) {
this.rowsBeans = rowsBeans;
this.context = context;
layoutInflater = LayoutInflater.from(context);
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// 创建ViewHolder, 返回每一项的布局
View view = layoutInflater.inflate(R.layout.service_item,parent,false);
MyViewHolder myViewHolder = new MyViewHolder(view,mItemClickListener);
return myViewHolder;
}
// 将数据与控件绑定
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
holder.service_name.setText(rowsBeans.get(position).getServiceName());
String url = APIConfig.BASE_URL + rowsBeans.get(position).getImgUrl();
Glide.with(context).load(url).into(holder.service_img);
}
// 返回Item总条数
@Override
public int getItemCount() {
// return 10;
return rowsBeans.size();
}
// 内部类,绑定控件
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView service_name;
private ImageView service_img;
private MyItemClickListener myListener;
public MyViewHolder(@NonNull View view,MyItemClickListener myItemClickListener) {
super(view);
this.myListener = myItemClickListener;
itemView.setOnClickListener(this);
service_img = view.findViewById(R.id.service_img);
service_name = view.findViewById(R.id.service_name);
}
@Override
public void onClick(View view) {
if (myListener!=null) {
myListener.onItemClick(view,getPosition());
}
}
}
//创建一个回调接口
public interface MyItemClickListener {
void onItemClick(View view,int position);
}
//在activity中adapter中调用此方法,将点击事件监听传递过去,并赋值给全局监听
public void setItemClickListener(MyItemClickListener myItemClickListener){
this.mItemClickListener = myItemClickListener;
}
}
package com.example.smartcity.bean;
import java.util.List;
/**
* @ProjectName: smartcity
* @Package: com.example.smartcity.bean
* @ClassName: ServiceBean
* @Description:
* @Author: liyingxia
* @CreateDate: 2021/3/14 14:03
*/
public class ServiceBean {
/**
* total : 6
* rows : [{"searchValue":null,"createBy":null,"createTime":"2020-10-12 18:17:23","updateBy":null,"updateTime":"2020-10-19 16:56:47","remark":null,"params":{},"id":2,"serviceName":"城市地铁","serviceDesc":"城市地铁路线","serviceType":"1","imgUrl":"/profile/ditie.png","pid":1,"isRecommend":1,"link":"metro_query/index"},{"searchValue":null,"createBy":null,"createTime":"2020-10-12 18:17:33","updateBy":null,"updateTime":"2020-10-19 16:56:47","remark":null,"params":{},"id":3,"serviceName":"智慧巴士","serviceDesc":"智慧巴士站点","serviceType":"1","imgUrl":"/profile/bus.png","pid":1,"isRecommend":1,"link":"bus_query/custom_shuttle"},{"searchValue":null,"createBy":null,"createTime":"2020-10-12 18:17:58","updateBy":null,"updateTime":"2020-10-19 16:56:47","remark":null,"params":{},"id":5,"serviceName":"门诊预约","serviceDesc":"快捷方便不要出门也能门诊预约","serviceType":"1","imgUrl":"/profile/menzheng.png","pid":1,"isRecommend":1,"link":"outpatient/hospitalList"},{"searchValue":null,"createBy":null,"createTime":"2020-10-12 18:18:21","updateBy":null,"updateTime":"2020-10-19 16:56:47","remark":null,"params":{},"id":7,"serviceName":"生活缴费","serviceDesc":"不要出门也能缴费","serviceType":"2","imgUrl":"/profile/live.png","pid":1,"isRecommend":1,"link":"living_expenses/index"},{},{"searchValue":null,"createBy":null,"createTime":"2020-10-23 16:17:56","updateBy":null,"updateTime":"2020-10-23 16:17:58","remark":null,"params":{},"id":17,"serviceName":"停车场","serviceDesc":"查询停车场","serviceType":"3","imgUrl":"/profile/pack.png","pid":1,"isRecommend":1,"link":"park/index"}]
* code : 200
* msg : 查询成功
*/
private int total;
private int code;
private String msg;
private List<RowsBean> rows;
public int getTotal() {
return total;
}
public void setTotal(int total) {
this.total = total;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public List<RowsBean> getRows() {
return rows;
}
public void setRows(List<RowsBean> rows) {
this.rows = rows;
}
public static class RowsBean {
/**
* searchValue : null
* createBy : null
* createTime : 2020-10-12 18:17:23
* updateBy : null
* updateTime : 2020-10-19 16:56:47
* remark : null
* params : {}
* id : 2
* serviceName : 城市地铁
* serviceDesc : 城市地铁路线
* serviceType : 1
* imgUrl : /profile/ditie.png
* pid : 1
* isRecommend : 1
* link : metro_query/index
*/
private Object searchValue;
private Object createBy;
private String createTime;
private Object updateBy;
private String updateTime;
private Object remark;
private ParamsBean params;
private int id;
private String serviceName;
private String serviceDesc;
private String serviceType;
private String imgUrl;
private int pid;
private int isRecommend;
private String link;
public Object getSearchValue() {
return searchValue;
}
public void setSearchValue(Object searchValue) {
this.searchValue = searchValue;
}
public Object getCreateBy() {
return createBy;
}
public void setCreateBy(Object createBy) {
this.createBy = createBy;
}
public String getCreateTime() {
return createTime;
}
public void setCreateTime(String createTime) {
this.createTime = createTime;
}
public Object getUpdateBy() {
return updateBy;
}
public void setUpdateBy(Object updateBy) {
this.updateBy = updateBy;
}
public String getUpdateTime() {
return updateTime;
}
public void setUpdateTime(String updateTime) {
this.updateTime = updateTime;
}
public Object getRemark() {
return remark;
}
public void setRemark(Object remark) {
this.remark = remark;
}
public ParamsBean getParams() {
return params;
}
public void setParams(ParamsBean params) {
this.params = params;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getServiceName() {
return serviceName;
}
public void setServiceName(String serviceName) {
this.serviceName = serviceName;
}
public String getServiceDesc() {
return serviceDesc;
}
public void setServiceDesc(String serviceDesc) {
this.serviceDesc = serviceDesc;
}
public String getServiceType() {
return serviceType;
}
public void setServiceType(String serviceType) {
this.serviceType = serviceType;
}
public String getImgUrl() {
return imgUrl;
}
public void setImgUrl(String imgUrl) {
this.imgUrl = imgUrl;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
public int getIsRecommend() {
return isRecommend;
}
public void setIsRecommend(int isRecommend) {
this.isRecommend = isRecommend;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public static class ParamsBean {
}
public RowsBean(String serviceName, String serviceDesc, String imgUrl, String link) {
this.serviceName = serviceName;
this.serviceDesc = serviceDesc;
this.imgUrl = imgUrl;
this.link = link;
}
@Override
public String toString() {
return "RowsBean{" +
"serviceName='" + serviceName + '\'' +
", serviceDesc='" + serviceDesc + '\'' +
", imgUrl='" + imgUrl + '\'' +
", link='" + link + '\'' +
'}';
}
}
}