【0041】Android基础-29-asycnHttpClient做get,post请求（使用开源项目）

【说明】在公司做简单的网络请求是可以使用这种方法的，但是头信息包含的比较多的话，不可以使用该开源包；

【0】开源包下载地址：http://pan.baidu.com/s/1nvNySPj

【1】GET方式源码

    public static void requestNetForGetLogin(final Context context,final Handler handler ,final String username, final String password) {
                //使用HttpClient请求服务器将用户密码发送服务器验证
                try{
                String path = "http://192.168.13.83:8080/itheima74/servlet/LoginServlet?username="+URLEncoder.encode(username,"utf-8")+"&pwd="+URLEncoder.encode(password,"utf-8");
        
                //创建一个AsyncHttpClient对象
                AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
                asyncHttpClient.get(path, new AsyncHttpResponseHandler() {
                    
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                        //statusCode:状态码    headers：头信息  responseBody：返回的内容，返回的实体
                        //判断状态码
                        if(statusCode == 200){
                            //获取结果
                            try {
                                String result = new String(responseBody,"utf-8");
                                Toast.makeText(context, result, 0).show();
                            } catch (UnsupportedEncodingException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
                    }
                    
                    @Override
                    public void onFailure(int statusCode, Header[] headers,
                            byte[] responseBody, Throwable error) {
                        
                        System.out.println("...............onFailure");
                        
                    }
                });
                }catch (Exception e) {
                    e.printStackTrace();
                }
    }

【2】POST方式源码

public static void requestNetForPostLogin( final Context context,final Handler handler ,final String username, final String password) {

            String path = "http://192.168.13.83:8080/itheima74/servlet/LoginServlet";
                    
    
            AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
            RequestParams params = new RequestParams();
            params.put("username", username);
            params.put("pwd", password);
            //url:   parmas：请求时携带的参数信息   responseHandler：是一个匿名内部类接受成功过失败
            asyncHttpClient.post(path, params, new AsyncHttpResponseHandler() {
                
                @Override
                public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                    //statusCode:状态码    headers：头信息  responseBody：返回的内容，返回的实体
                    
                    //判断状态码
                    if(statusCode == 200){
                        //获取结果
                        try {
                            
                            String result = new String(responseBody,"utf-8");
                            Toast.makeText(context, result, 0).show();
                        } catch (Exception e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                    
                }
                
                @Override
                public void onFailure(int statusCode, Header[] headers,
                        byte[] responseBody, Throwable error) {
                    
                }
            });


    }

【3】本节源码下载地址：http://pan.baidu.com/s/1skTghvZ

【4】文件上传

【4.1】使用web端发生的上传文件界面：

【4.2】在文件上传时发生的数据包的信息：

【4.3】APP上传文件成功的效果

【4.4】需要使用第三方的包

【5】jar包的导出

【6】【源码】

 

/*MianActivity.java*/
package com.itheima.fileupload;

import java.io.File;

import org.apache.http.Header;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

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

    
    
    public void fileupload(View v){
        try{
        EditText et_filepath = (EditText) findViewById(R.id.et_filepath);
        //获取输入的文件地址
        String filepath = et_filepath.getText().toString().trim();
        
        //使用开源Utils做上传操作
        AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
        
        RequestParams params = new RequestParams();
        params.put("filename", new File(filepath));
        //url : 请求服务器的url
        asyncHttpClient.post("http://192.168.13.83:8080/itheima74/servlet/UploaderServlet", params, new AsyncHttpResponseHandler() {
            
            @Override
            public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                if(statusCode == 200){
                    Toast.makeText(MainActivity.this, "上传成功", 0).show();
                }
            }
            @Override
            public void onFailure(int statusCode, Header[] headers,
                    byte[] responseBody, Throwable error) {
            }
        });
        
        }catch (Exception e) {
            e.printStackTrace();
        }
    }

}

 

<RelativeLayout 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"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/et_filepath"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <Button
        android:onClick="fileupload"
        android:text="上传"
        android:layout_below="@id/et_filepath"
        android:id="@+id/bt_upload"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</RelativeLayout>