Java 将图像/文本文件从Android发送到Web服务器（本地主机）

我对Android编程非常陌生，我的任务是向web服务器（localhost）发送图像和文本数据，但是我已经尝试了很多代码来完成这项工作

它们都不起作用。每当我试图执行代码时，我的应用程序就会崩溃，所以我决定调试代码，看看问题出在哪里。然后我发现

每当发现一个多端口时，代码就会崩溃。。我真的不知道为什么

代码是这样的

Log.v(TAG, "(1)");
HttpClient httpClient;
HttpPost postRequest;
Log.v(TAG, "(2)" + picturePath);
MultipartEntity reqEntity;
ResponseHandler<String> responseHandler;
Log.v(TAG, "(3)");
File file;
FileBody fileBody;
Log.v(TAG, "(4)");
httpClient = new DefaultHttpClient();
postRequest = new HttpPost("http://192.168.5.132/mysite/test.php");
responseHandler = new BasicResponseHandler();
Log.v(TAG, "(5)");
    // Indicate that this information comes in parts (text and file)
reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
Log.v(TAG, "(6)");
file = new File(picturePath);
fileBody = new FileBody(file, "images/jpeg");
reqEntity.addPart("fileupload", fileBody);
Log.v(TAG, "(7)");
try {
      reqEntity.addPart("username", new StringBody("un"));
      reqEntity.addPart("password", new StringBody("pw"));

      postRequest.setEntity(reqEntity);
      httpClient.execute(postRequest, responseHandler);
    }
catch (UnsupportedEncodingException e) {
      e.printStackTrace();
}
catch (ClientProtocolException e) {
      e.printStackTrace();
}
catch (IOException e) {
      e.printStackTrace();
}

---

真的需要你的帮助。。非常感谢你

设备/仿真器本身是一台拥有自己本地主机循环的机器

正如您所了解的，当您使用emulator时，localhost（127.0.0.1）指的是设备自己的环回服务，而不是您可能期望的机器上的环回服务

因此，每当你给locahost/127.0.0.x，这意味着它试图在你的设备环境中搜索你的服务，所以它会失败。因为您的web服务项目在设备/仿真器循环上不可用

因此，可以使用10.0.2.2访问您的实际计算机，这是一个别名，用于帮助开发

网络地址空间

---

看看这个

试试这个，它可能会对您有所帮助。它是使用AsyncHttpClient库完成的，获取jar文件并将其附加到您的项目中，然后使用以下代码上载任何文件-

RequestParams params=new RequestParams();

String file = getImagePath().toString();//get path of file you want to upload
        File myfile_one=new  File(file);
try {
    params.put("image1", myfile_one);//image 1 is the key(it uses key-value pair)        
} catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}


AsyncHttpClient client=new AsyncHttpClient();
    client.post(Constant.url_two, params,new AsyncHttpResponseHandler(){
//here implement the methods of library and write rest of your code
}

---

您可以在链接中找到其他连接到服务器的方法。试试看，这真的很简单。

试试这段代码100%正常工作。图像上传是通过多部分数据传递完成的

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.fileupload.MainActivity"
    tools:ignore="MergeRootFrame" >

    <ImageView
        android:id="@+id/imageView_pic"
        android:layout_width="100dp"
        android:layout_height="150dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:src="@drawable/abc_ab_bottom_solid_light_holo" />

    <Button
        android:id="@+id/button_selectpic"
        android:layout_width="250dp"
        android:layout_height="50dp"
        android:layout_below="@+id/imageView_pic"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="18dp"
        android:text="Browse" />

    <Button
        android:id="@+id/uploadButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button_selectpic"
        android:layout_alignRight="@+id/button_selectpic"
        android:layout_below="@+id/button_selectpic"
        android:text="upload" />

    <TextView
        android:id="@+id/messageText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/uploadButton"
        android:layout_alignRight="@+id/uploadButton"
        android:layout_below="@+id/uploadButton"
        android:layout_marginTop="38dp"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceMedium" />

</RelativeLayout>

php服务器代码

<?php
 $response = array();
if (empty($_FILES) || $_FILES['file']['error']) {
 $response["code"] = 2;
        $response["message"] = "failed to move uploaded file";
        echo json_encode($response);
 }

$chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
$chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 0;

$fileName = isset($_REQUEST["name"]) ? $_REQUEST["name"] : $_FILES["file"]["name"];
$filePath = "uploads/$fileName";


// Open temp file
$out = @fopen("{$filePath}.part", $chunk == 0 ? "wb" : "ab");

if ($out) {
  // Read binary input stream and append it to temp file
  $in = @fopen($_FILES['file']['tmp_name'], "rb");

  if ($in) {
    while ($buff = fread($in, 4096))
          fwrite($out, $buff);

  } else

 $response["code"] = 2;
 $response["message"] = "Oops!  Failed to open input Stream error occurred.";
 echo json_encode($response);
  @fclose($in);

  @fclose($out);

  @unlink($_FILES['file']['tmp_name']);
} else

   $response["code"] = 2;
        $response["message"] = "Oops! Failed to open output error occurred.";
        echo json_encode($response);


// Check if file has been uploaded
if (!$chunks || $chunk == $chunks - 1) {
  // Strip the temp .part suffix off
  rename("{$filePath}.part", $filePath);
}
  $response["code"] = 2;
        $response["message"] = "successfully uploaded";
        echo json_encode($response);

?>

将所需值传递给此函数，并在php上添加$\u post[“username”]、$\u post[“password”]

public JSONObject getJSONFromUrl(String url, String username,
            String password,  String photo_path) {
InputStream is = null;
    JSONObject jObj = null;
    static String jsonResp = "";
    String CONTENT_TYPE_JSON = "application/json";
    static String json = "";
    Context context;

        try {
            File file = null;
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);
            MultipartEntity entity = new MultipartEntity(
                    HttpMultipartMode.BROWSER_COMPATIBLE);

            if(photo_path != null)
                file = new File(photo_path);

            //temp end
            entity.addPart("username", new StringBody(username));
            entity.addPart("password", new StringBody(password));

            entity.addPart("file", new FileBody(file));
            entity.addPart("filetype",new StringBody("jpeg"));
            // entity.addPart("photo", new
            // StringBody("/storage/sdcard0/Download/1.jpg"));
            httpPost.setEntity(entity);

            Log.d("URL Request: ", url.toString());

            HttpResponse httpResponse = httpClient.execute(httpPost);
            int code = httpResponse.getStatusLine().getStatusCode();

            if (code != 200) {
                Log.d("HTTP response code is:", Integer.toString(code));
                return null;
            } else {
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();
            }
        } catch (ConnectTimeoutException e) {
            // TODO: handle exception

            Log.e("Timeout Exception", e.toString());
            return null;
        } catch (SocketTimeoutException e) {
            // TODO: handle exception
            Log.e("Socket Time out", e.toString());
            return null;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            return null;
        } catch (ClientProtocolException e) {
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }

        try {

            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            jsonResp = sb.toString();

            Log.d("Content: ", sb.toString());

        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting Response " + e.toString());
            return null;
        }

        // try parse the string to a JSON object
        try {
            jObj = new JSONObject(jsonResp);

        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON Object
        return jObj;
    }

---

您可以使用截取将文件从android上传到服务器

在这里检查

---

您是否能够从设备或模拟器连接到本地主机，或者是否安装了正确的库？看看你为什么要用它。HttpMultipartMode.BROWSER\u兼容选项？@indra抱歉，回复太晚。。我正在检查我的设备是否可以访问我的本地主机，是。。它可以访问它。。我通过从我的localhost调用一个HTML页面来测试它。它不是localhost:。因此，您指定的特定ip可能是您的系统ip。@lavekush ip地址10.0.x.x不会适用于所有情况。但如果您在cmd提示符中使用ipconfig获取ipv4。Ip看起来像192.x.x.x。我使用了你代码中的UploadFile函数，并将其插入到我的代码中。。但是它仍然崩溃。。这次它在执行

dos=newdataoutputstream（conn.getOutputStream（））之前停止。。我还更改了代码中重要变量的值，以便在我的代码上运行..检查getJSONFromUrl函数
<?php
 $response = array();
if (empty($_FILES) || $_FILES['file']['error']) {
 $response["code"] = 2;
        $response["message"] = "failed to move uploaded file";
        echo json_encode($response);
 }

$chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
$chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 0;

$fileName = isset($_REQUEST["name"]) ? $_REQUEST["name"] : $_FILES["file"]["name"];
$filePath = "uploads/$fileName";


// Open temp file
$out = @fopen("{$filePath}.part", $chunk == 0 ? "wb" : "ab");

if ($out) {
  // Read binary input stream and append it to temp file
  $in = @fopen($_FILES['file']['tmp_name'], "rb");

  if ($in) {
    while ($buff = fread($in, 4096))
          fwrite($out, $buff);

  } else

 $response["code"] = 2;
 $response["message"] = "Oops!  Failed to open input Stream error occurred.";
 echo json_encode($response);
  @fclose($in);

  @fclose($out);

  @unlink($_FILES['file']['tmp_name']);
} else

   $response["code"] = 2;
        $response["message"] = "Oops! Failed to open output error occurred.";
        echo json_encode($response);


// Check if file has been uploaded
if (!$chunks || $chunk == $chunks - 1) {
  // Strip the temp .part suffix off
  rename("{$filePath}.part", $filePath);
}
  $response["code"] = 2;
        $response["message"] = "successfully uploaded";
        echo json_encode($response);

?>

entity.addPart("user_id", new StringBody(user_id));
            Log.d("userid",user_id);
            entity.addPart("username", new StringBody(username));
            entity.addPart("password", new StringBody(password));
            entity.addPart("filetype",new StringBody("jpeg"));
            // entity.addPart("photo", new
            // StringBody("/storage/sdcard0/Download/1.jpg"));
            httpPost.setEntity(entity);

            Log.d("URL Request: ", url.toString());

            HttpResponse httpResponse = httpClient.execute(httpPost);
            int code = httpResponse.getStatusLine().getStatusCode(); 

public JSONObject getJSONFromUrl(String url, String username,
            String password,  String photo_path) {
InputStream is = null;
    JSONObject jObj = null;
    static String jsonResp = "";
    String CONTENT_TYPE_JSON = "application/json";
    static String json = "";
    Context context;

        try {
            File file = null;
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);
            MultipartEntity entity = new MultipartEntity(
                    HttpMultipartMode.BROWSER_COMPATIBLE);

            if(photo_path != null)
                file = new File(photo_path);

            //temp end
            entity.addPart("username", new StringBody(username));
            entity.addPart("password", new StringBody(password));

            entity.addPart("file", new FileBody(file));
            entity.addPart("filetype",new StringBody("jpeg"));
            // entity.addPart("photo", new
            // StringBody("/storage/sdcard0/Download/1.jpg"));
            httpPost.setEntity(entity);

            Log.d("URL Request: ", url.toString());

            HttpResponse httpResponse = httpClient.execute(httpPost);
            int code = httpResponse.getStatusLine().getStatusCode();

            if (code != 200) {
                Log.d("HTTP response code is:", Integer.toString(code));
                return null;
            } else {
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();
            }
        } catch (ConnectTimeoutException e) {
            // TODO: handle exception

            Log.e("Timeout Exception", e.toString());
            return null;
        } catch (SocketTimeoutException e) {
            // TODO: handle exception
            Log.e("Socket Time out", e.toString());
            return null;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            return null;
        } catch (ClientProtocolException e) {
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }

        try {

            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            jsonResp = sb.toString();

            Log.d("Content: ", sb.toString());

        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting Response " + e.toString());
            return null;
        }

        // try parse the string to a JSON object
        try {
            jObj = new JSONObject(jsonResp);

        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON Object
        return jObj;
    }