在 Nougat 7.0 及更高版本中使用 Multipartentity 的图像上传问题

Question

我已使用以下代码从相机捕获图像并存储到设备中。然后我通过使用 multipartentity 按下按钮上传了这些文件。这些代码在所有版本中都可以正常工作，但在 Nougat 7.0 + 更高版本上工作失败，

String serverResponseCode = uploadFiles(path.next());
public String uploadFiles(String sourceFileUri)
    {
        String responseString = null;
        try
        {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http:/upload.php");
            AndroidMultiPartEntity entity = new AndroidMultiPartEntity();
            File sourceFile = new File(sourceFileUri);
            entity.addPart("image", new FileBody(sourceFile));
            entity.addPart("username",new StringBody(Username));
            httppost.setEntity(entity);    
            // Making server call
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity r_entity = response.getEntity();    
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == 200)
            {                   
                responseString = EntityUtils.toString(r_entity);
            }
            else {
                responseString = "Error occurred! Http Status Code: " + statusCode; }
        }
        catch (ClientProtocolException e)
        {
            responseString = e.toString();
        }
        catch (IOException e){
            responseString = e.toString();
        }
        return responseString;
    }

我在服务器端使用了以下 PHP 代码。这些代码创建了文件夹，但图像不可用。

<?php

// Path to move uploaded files
//$target_path = "uploads/";
$year = date("Y-m-d");
$username = isset($_POST['username']) ? $_POST['username'] : '';

 $target_path=$year."/".$username."/"; 
//If the directory doesn't already exists.
 if(!is_dir($target_path))
 {
     //Create our directory.
    mkdir($target_path,0777,true);
 }

// array for final json respone
$response = array();

// getting server ip address
$server_ip = gethostbyname(gethostname());

// final file url that is being uploaded
$file_upload_url = 'http://' . $server_ip . '/' . 'Merchandise' . '/' . $target_path;


if (isset($_FILES['image']['name'])) 
{
    $target_path = $target_path . basename($_FILES['image']['name']);

    // reading other post parameters
    //$email = isset($_POST['email']) ? $_POST['email'] : '';
    //$website = isset($_POST['website']) ? $_POST['website'] : '';

    $response['file_name'] = basename($_FILES['image']['name']);
    //$response['email'] = $email;
    //$response['website'] = $website;

    try {
        // Throws exception incase file is not being moved
        if (!move_uploaded_file($_FILES['image']['tmp_name'], $target_path)) 
    {
            // make error flag true
            $response['error'] = true;
            $response['message'] = 'Could not move the file!';
        }

        // File successfully uploaded
        $response['message'] = 'File uploaded successfully!';
        $response['error'] = false;
        $response['file_path'] = $file_upload_url . basename($_FILES['image']['name']);
    } 
    catch (Exception $e) 
    {
        // Exception occurred. Make error flag true
           $response['error'] = true;
               $response['message'] = $e->getMessage();
    }
} else {
    // File parameter is missing
    $response['error'] = true;
    $response['message'] = 'Not received any file!F';
}

// Echo final json response to client
echo json_encode($response);
?>

Answer 1

使用FileProvider

String serverResponseCode = uploadFiles(path.next());
public String uploadFiles(String sourceFileUri)
    {

    File imagePath = new File(getFilesDir(), "external_files");
    imagePath.mkdir();
    File imageFile = new File(imagePath.getPath(), "test.jpg");

    // Write data in your file

    Uri fileUri= FileProvider.getUriForFile(this, getPackageName(), imageFile);
        String responseString = null;
        try
        {

            File file = new File(fileUri.getPath());
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http:/upload.php");
            AndroidMultiPartEntity entity = new AndroidMultiPartEntity();
            File sourceFile = new File(fileUri.getPath());
            entity.addPart("image", new FileBody(sourceFile));
            entity.addPart("username",new StringBody(Username));
            httppost.setEntity(entity);    
            // Making server call
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity r_entity = response.getEntity();    
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == 200)
            {                   
                responseString = EntityUtils.toString(r_entity);
            }
            else {
                responseString = "Error occurred! Http Status Code: " + statusCode; }
        }
        catch (ClientProtocolException e)
        {
            responseString = e.toString();
        }
        catch (IOException e){
            responseString = e.toString();
        }
        return responseString;
    }

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