Android_OkHttp封装

一:定义一个接口里面有请求成功与失败的方法

public interface CallBack {    void onSuccess(Object o);    void onFailed(Exception e);}

二:工具类中

package activity.example.com.httputils;import android.os.Handler;import com.google.gson.Gson;import java.io.IOException;import java.util.Map;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.Response;/** * Created by 壹颗大金星 on 2017/11/9. */public class HttpUtils {    private static volatile HttpUtils instance;    private static Handler handler = new Handler();    private HttpUtils(){    }    public static HttpUtils getInstance() {        if (instance == null) {            synchronized (HttpUtils.class) {                if (instance == null) {                    instance = new HttpUtils();                }            }        }        return instance;    }    //get请求    public void get(String url, Map<String,String> map, final CallBack callBack, final Class c){        //对url和参数做拼接处理        StringBuffer stringBuffer = new StringBuffer();        stringBuffer.append(url);        //判断是否存在?   if中是存在        if(stringBuffer.indexOf("?")!=-1 ){            //判断?是否在最后一位    if中是不在最后一位            if(stringBuffer.indexOf("?")!=stringBuffer.length()-1){                stringBuffer.append("&");            }        }else{            stringBuffer.append("?");        }        for(Map.Entry<String,String> entry:map.entrySet()){            stringBuffer.append(entry.getKey())                        .append("=")                        .append(entry.getValue())                        .append("&");        }//判断是否存在&   if中是存在if(stringBuffer.indexOf("&")!=-1){        stringBuffer.deleteCharAt(stringBuffer.lastIndexOf("&"));}        //1:创建OkHttpClient对象        OkHttpClient okHttpClient = new OkHttpClient();        //2:创建Request对象        final Request request = new Request.Builder()                .get()                .url(stringBuffer.toString())                .build();        //3:创建Call对象        Call call = okHttpClient.newCall(request);        //4:请求网络        call.enqueue(new Callback() {            //请求失败            @Override            public void onFailure(Call call, final IOException e) {                handler.post(new Runnable() {                    @Override                    public void run() {                        callBack.onFailed(e);                    }                });            }            //请求成功            @Override            public void onResponse(Call call, Response response) throws IOException {                String result = response.body().string();                //拿到数据解析                final Object o = new Gson().fromJson(result, c);                //当前是在子线程,回到主线程中                handler.post(new Runnable() {                    @Override                    public void run() {                        //回调                        callBack.onSuccess(o);                    }                });            }        });    }    //post请求    public void post(String url, Map<String,String> map, final CallBack callBack, final Class c){        //1:创建OkHttpClient对象        OkHttpClient okHttpClient = new OkHttpClient();        //2:提供post请求需要的body对象        FormBody.Builder builder = new FormBody.Builder();        for(Map.Entry<String,String> entry:map.entrySet()){            builder.add(entry.getKey(),entry.getValue());        }        FormBody body = builder.build();        //3:创建Request对象        final Request request = new Request.Builder()                .post(body)                .url(url)                .build();        //4:创建Call对象        Call call = okHttpClient.newCall(request);        //5:请求网络        call.enqueue(new Callback() {            //请求失败            @Override            public void onFailure(Call call, final IOException e) {                handler.post(new Runnable() {                    @Override                    public void run() {                        callBack.onFailed(e);                    }                });            }            //请求成功            @Override            public void onResponse(Call call, Response response) throws IOException {                String result = response.body().string();                //拿到数据解析                final Object o = new Gson().fromJson(result, c);                //当前是在子线程,回到主线程中                handler.post(new Runnable() {                    @Override                    public void run() {                        //回调                        callBack.onSuccess(o);                    }                });            }        });    }}

三:MainActivity引用

package activity.example.com.httputils;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;import java.util.HashMap;import java.util.Map;public class MainActivity extends AppCompatActivity {    private Button get;    private TextView text;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        get = (Button)findViewById(R.id.get);        text = (TextView)findViewById(R.id.text);        get.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Map<String,String> map = new HashMap<String, String>();                map.put("mobile","00000000000");                map.put("password","123456");                HttpUtils.getInstance().get("http://120.27.23.105/user/login", map,                        new CallBack() {                            @Override                            public void onSuccess(Object o) {                                //o请求回来的数据,已经解析完                                final User user = (User)o;                                //请求出来的数据展示到textview上                                text.setText(user.getMsg());                            }                            @Override                            public void onFailed(Exception e) {                            }                        },User.class);//最后一个参数是解析的实体类            }        });    }}