封装OkHttp工具类

package cgg.com.scg.Utils;

import android.annotation.SuppressLint;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
* author: shichenguang
* date:   2018/1/3 11:54
* email:  none
*/

public class NetUtls {
private MyCallBack myCallBack;
@SuppressLint("HandlerLeak")
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
int tab = msg.what;
String json = (String) msg.obj;
switch (tab) {
case 0:
myCallBack.mError("请求失败!");
break;
case 1:
myCallBack.mSucceed(json);
break;
}
}
};

public NetUtls(String url) {
// 创建okHttpClient
OkHttpClient okHttpClient = new OkHttpClient();
// 获取请求对象
final Request request = new Request.Builder().url(url).build();
// 获取Call
Call call = okHttpClient.newCall(request);
// 执行请求
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {// 失败回调
Log.e("TAG", e.getMessage().toString());
Message msg = new Message();
msg.what = 0 ;
msg.obj = "请求失败";
handler.sendMessage(msg);
}

@Override
public void onResponse(Call call, Response response) throws IOException {
// Log.e("TAG", response.body().string());
Message msg = new Message();
msg.what = 1 ;
msg.obj = response.body().string();
//msg.obj = "How are you";
handler.sendMessage(msg);
}
});
}

// 创建内部接口
public interface MyCallBack {
void mError(String err);
void mSucceed(String succeed);
}

public void setMyCallBack(MyCallBack myCallBack){
this.myCallBack = myCallBack;
}

}

package cgg.com.scg;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

import cgg.com.scg.Utils.NetUtls;

public class MainActivity extends AppCompatActivity {
private TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = findViewById(R.id.tv);
NetUtls netUtls = new NetUtls("http://blog.csdn.net/u011692041/article/details/51371367");
netUtls.setMyCallBack(new NetUtls.MyCallBack() {
@Override
public void mError(String err) {
textView.setText(err);
}

@Override
public void mSucceed(String succeed) {
textView.setText(succeed);
}
});
}
}