Android封装OkHttpClient的类库

由于android6.0的SDK没有HttpClient,只有HttpURLConnection和OkHttpClient,特记下OkHttpClient的使用方法

1.Ui测试界面布局

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

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    android:orientation="vertical"

    tools:context="com.example.lidezhen.httpdemo.MainActivity">

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:hint="Get方式"

        android:id="@+id/button1"

        android:onClick="Button1_Click"/>

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:hint="Post方式"

        android:id="@+id/button2"

        android:onClick="Button2_Click"/>

    <ScrollView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content">

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:id="@+id/text1"

            android:hint="这是内容"/>

    </ScrollView>

</LinearLayout>

添加权限

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

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

    package="com.example.lidezhen.httpdemo">

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

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme">

 <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" />

 <category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

 </application>

 </manifest>

代码

package com.example.lidezhen.httpdemo;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.TextView;

import okhttp3.FormBody;

import okhttp3.OkHttpClient;

import okhttp3.Request;

import okhttp3.Response;

public class MainActivity extends AppCompatActivity {

    TextView textView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        textView= (TextView) findViewById(R.id.text1);

    }

    public void Button1_Click(View v)  {

        new  Thread(new Runnable() {

              @Override

              public void run() {

                  String url="https://www.baidu.com/";

                  OkHttpClient client = new OkHttpClient();

                  Request request = new Request.Builder()

                          .url(url).build();

                  Response response = null;

                  try {

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

                      if (response.isSuccessful()) {

                          SetText( response.body().string());

                      } else {

                          SetText( "Unexpected code " + response);

                      }

                  }

                  catch (Exception e)

                  {

                      SetText( "获取网页失败");

                  }

              }

          }).start();

    }

    public void SetText(final String s)

    {

        runOnUiThread(new Runnable() {

            @Override

            public void run() {

                textView.setText(s);

            }

        });

    }

    public void Button2_Click(View v)

    {

        new  Thread(new Runnable() {

            @Override

            public void run() {

                String url="https://passport.baidu.com/v2/api/?login";

                OkHttpClient client = new OkHttpClient();

                FormBody.Builder formBody = new FormBody.Builder();

                formBody.add("username","abc123").add("password","123456");

                Request request = new Request.Builder()

                        .post(formBody.build())

                        .url(url).build();

                Response response = null;

                try {

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

                    if (response.isSuccessful()) {

                        SetText( response.body().string());

                    } else {

                        SetText( "Unexpected code " + response);

                    }

                }

                catch (Exception e)

                {

                    SetText( "获取网页失败");

                }

            }

    }).start();

}

}