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();

}
}