安卓学习-ApacheHttpClient简介-GET请求-POST请求

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第三方组件

服务器端 与上一节 相同

只放 主要代码

activity_apache_http_client.xml

    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"
    tools:context="com.example.administrator.http.ApacheHttpClientActivity">

            android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="HttpClient GET请求"
        android:id="@+id/button4"
        android:onClick="getClick"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

            android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="HttpClient POST请求"
        android:id="@+id/button5"
        android:onClick="postClick"
        android:layout_below="@+id/button4"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

ApacheHttpClientActivity.java

package com.example.administrator.http;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

/*两种请求方式的区别
* get:大小不能超过4KB，传输速度快，会在URL上显示，不安全
* post：大小不限制，传输速度比GET稍慢，不会再URL上显示，安全性高*/
public class ApacheHttpClientActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_apache_http_client);
    }

    public void getClick(View view) {
        getRequest();
    }

    //使用apache HttpClient的GET请求
    private void getRequest() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                String path = "http://169.254.228.77:8080/user/LoginServlet?username=xiaofei&password=123";

                //创建请求对象
                HttpGet get = new HttpGet(path);
                //创建HTTP客户端对象，用于发送请求
                HttpClient httpClient = new DefaultHttpClient();
                try {
                    //向服务器发送请求，并返回响应对象
                    HttpResponse response = httpClient.execute(get);
                    //获取响应的状态码
                    int status = response.getStatusLine().getStatusCode();
                    switch (status) {
                        case HttpStatus.SC_OK://200
                            //当成一个实体对象
                            HttpEntity entity = response.getEntity();
                            String result = EntityUtils.toString(entity, "utf-8");
                            System.out.println(result);
                            break;
                        case HttpStatus.SC_NOT_FOUND://404
                            break;
                        case HttpStatus.SC_INTERNAL_SERVER_ERROR://500
                            break;
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }

    public void postClick(View view) {
        postRequest();
    }

    //使用apache HttpClient的POST请求
    public void postRequest() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                String path = "http://169.254.228.77:8080/user/LoginServlet";
                //创建请求对象
                HttpPost post = new HttpPost(path);

                //传递参数
                ArrayList params = new ArrayList();
                params.add(new BasicNameValuePair("username", "xiaofei"));
                params.add(new BasicNameValuePair("password", "123"));
                try {
                    HttpEntity entity = new UrlEncodedFormEntity(params);
                    post.setEntity(entity);

                    HttpClient httpClient = new DefaultHttpClient();
                    HttpResponse response = httpClient.execute(post);
                    int status = response.getStatusLine().getStatusCode();
                    switch (status) {
                        case HttpStatus.SC_OK://200
                            String result = EntityUtils.toString(response.getEntity());
                            System.out.println(result);
                            break;
                        case HttpStatus.SC_NOT_FOUND://404
                            Log.i("HttpClient", "404");
                            break;
                        case HttpStatus.SC_INTERNAL_SERVER_ERROR://500
                            Log.i("HttpClient", "500");
                            break;
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }
}

转载于:https://my.oschina.net/xiaofeiandroid/blog/653942