Android客户端与Python服务器端通讯之上传图片

继上篇成功的与服务器端通讯上以后，我如今须要将安卓本地的图片上传到服务端。服务端接收图片存下来。

参考：https://blog.csdn.net/qq_26906345/article/details/91045074

Android客户端：

点击按钮会将文件上传到服务器，图片的地址我暂时是写死的。

 

 

 服务器端：

接收到图片存储到写好的位置

相关代码以下：

Android客户端：因为布局文件只有一个按钮，故不在此展出。

MainActivity.java：主要就是设置了对按钮的监听。

package com.example.vesper.uploadpic; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import java.io.File; public class MainActivity extends AppCompatActivity { private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button=findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { File f=new File(Environment.getExternalStorageDirectory().getPath()+"/mahc/image/1573125250817.jpg"); try { ImageUpload.run(f); } catch (Exception e) { e.printStackTrace(); } } }); } }

View Code

ImageUpload.java：开启线程上传图片。

 1 package com.example.vesper.uploadpic;  2 
 3 import java.io.File;  4 import java.io.IOException;  5 
 6 import okhttp3.MediaType;  7 import okhttp3.MultipartBody;  8 import okhttp3.OkHttpClient;  9 import okhttp3.Request; 10 import okhttp3.RequestBody; 11 import okhttp3.Response; 12 
13 public class ImageUpload{ 14 
15     private static final MediaType MEDIA_TYPE_JPG = MediaType.parse("image/jpg"); 16     private static final OkHttpClient client = new OkHttpClient(); 17     public static void run(File f) throws Exception { 18         final File file=f; 19         new Thread() { 20  @Override 21             public void run() { 22                 //子线程须要作的工做
23                 RequestBody requestBody = new MultipartBody.Builder() 24  .setType(MultipartBody.FORM) 25                         .addFormDataPart("file","1.jpg", 26  RequestBody.create(MEDIA_TYPE_JPG, file)) 27  .build(); 28                 //设置为本身的ip地址
29                 Request request = new Request.Builder() 30                         .url("http://192.168.xxx.xxx:5000/upload") 31  .post(requestBody) 32  .build(); 33                 try(Response response = client.newCall(request).execute()){ 34                     if (!response.isSuccessful()) throw new IOException("Unexpected code " + response); 35 
36  System.out.println(response.body().string()); 37                 } catch (IOException e) { 38  e.printStackTrace(); 39  } 40  } 41  }.start(); 42  } 43 }

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Python服务器端：

uploadserver.py：

 1 #-*-coding:utf-8-*-
 2 from flask import Flask  3 from flask import request  4 import cv2  5 import os  6 from werkzeug.utils import secure_filename  7 app = Flask(__name__)  8 basedir=os.path.abspath(os.path.dirname(__file__))  9 
10 @app.route('/') 11 def test(): 12     return '服务器正常运行'
13 
14 #此方法接收图片
15 @app.route('/upload',methods=['POST']) 16 def upload(): 17     f = request.files['file'] 18     print('链接成功') 19    # 当前文件所在路径
20     basepath = os.path.dirname(__file__) 21     upload_path = os.path.join(basepath, '1115', secure_filename(f.filename)) 22     # 保存文件
23  f.save(upload_path) 24     return '保存成功'
25 
26 if __name__ == '__main__': 27     app.run(host='0.0.0.0')

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遇到的问题：

1.读文件权限要在Manifest.xml中加上：

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

2.在gradle中修改最小SDK为19.