Android OkHttp学习使用

用到的第三方包 OkHTTP
     Github地址:
注意：
        这里涉及到了网络操作，所以一定记得加上相关的权限：
  

<uses-permission android:name="android.permission.INTERNET" />

一、GET请求：
    

package barneyx.com.okhttpdemo;

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

import org.w3c.dom.Text;

import java.io.IOException;

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

public class MainActivity extends AppCompatActivity {

    private String mBaseUrl = "";
    private TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = (TextView)findViewById(R.id.t_view);
    }

    public void doGet(View view) throws IOException{
        //1.拿到okHttpClient对象
        OkHttpClient okHttpClient = new OkHttpClient();

        //2.构造Reqeust
        Request.Builder builder = new Request.Builder();
        Request request =builder.get().url(
                mBaseUrl+"user!login?username=bai&password=xiaobai"
        ).build();

        //3.将Request封装为Call
        Call call = okHttpClient.newCall(request);
        //Response response =  call.execute();

        //4.执行Call
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                L.e("onFailure"+e.getMessage());
                e.printStackTrace();
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                L.e("OnResponse:");
               final String res = response.body().string();
                L.e(res);
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        tv.setText(res);
                    }
                });


            }
        });
    }
}

activity_main.xml布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""
    xmlns:tools=""
    android:id="@+id/activity_main"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="barneyx.com.okhttpdemo.MainActivity">
    <Button
        android:text="Get"
        android:onClick="doGet"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/t_view"
        android:text="hello world"
        android:gravity="center"
        android:paddingTop="10dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />




</LinearLayout>