安卓通过OkHttp获取json数据

使用Http协议访问网络

OkHttp使用

可以很好的获取接口数据！json数据！

支持get和post提交方式！！！

1.引入模块

compile 'com.squareup.okhttp3:okhttp:3.4.1'

然后系统会自动引入模块

2.设置权限

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

支持上网

3.布局

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    >

    <Button

        android:id="@+id/send_request"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Send Request"

        />

    <ScrollView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        >

        <TextView

            android:id="@+id/response_text"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            />

    </ScrollView>

</LinearLayout>

4.实现功能

点击按钮，获取接口数据并展示

package demo.jq.com.networktest;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import java.io.BufferedReader;

import java.io.EOFException;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import okhttp3.FormBody;

import okhttp3.OkHttpClient;

import okhttp3.Request;

import okhttp3.RequestBody;

import okhttp3.Response;

/**

 * @author jim

 */

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    TextView responseText;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Button sendRequest = (Button) findViewById(R.id.send_request);

        responseText = (TextView) findViewById(R.id.response_text);

        sendRequest.setOnClickListener(this);

    }

    @Override

    public void onClick(View v) {

        if (v.getId() == R.id.send_request) {

            sendRequestWithOkHttp();

        }

    }

    private void sendRequestWithOkHttp() {

        // 开启线程来发起网络请求

        new Thread(new Runnable() {

            @Override

            public void run() {

                HttpURLConnection connection = null;

                BufferedReader reader = null;

                try {

                    OkHttpClient client = new OkHttpClient();

                    // post请求

                    RequestBody requestBody = new FormBody.Builder()

                            .add("type","1")

                            .build();

                    Request request = new Request.Builder()

                            .url("http://devmg.yunlutong.com/api/test/testApi")

                            .post(requestBody)

                            .build();

                    Response response = client.newCall(request).execute();

                    String responseData = response.body().string();

                    showResponse(responseData);

                } catch (Exception e) {

                    e.printStackTrace();

                } finally {

                    if (reader != null) {

                        try {

                            reader.close();

                        } catch (IOException e) {

                            e.printStackTrace();

                        }

                    }

                    if (connection != null) {

                        connection.disconnect();

                    }

                }

            }

        }).start();

    }

    private void showResponse(final String response) {

        runOnUiThread(new Runnable() {

            @Override

            public void run() {

                responseText.setText(response);

            }

        });

    }

}