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Android是一种基于Linux的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由Google公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用“安卓”或“安致”。
这篇文章主要介绍了Android4.4 webAPI实现拍照上传功能,本文给出4.4版本后拍照上传的具体实现方法,感兴趣的小伙伴们可以参考一下
网上有很多关于拍照上传的实现方法,如果用新版本android去运行有可能会发现根本实现不了。主要原因是android从4.4版本开始通过intent.ACTION_GET_CONTENT打开选择器后,getData()返回的URI没有包含真实的文件路径,而是像这样“content://com.android.providers.media.documents/document/image:1234”,以至于用传统的方式找不到图片的路径。最简单的解决办法是用intent.ACTION_PICK代替intent.ACTION_GET_CONTENT。
下面给出4.4版本后拍照上传的具体实现方法:
第一步:点击拍照按钮代码
- //点击拍照
- btnHeadCamera.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View view) {
- Intent itCamera=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
- startActivityForResult(itCamera,0);
- }
- });
第二步:保存拍照图片代码
- @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- switch (requestCode) {
- case 0:
- //拍照
- savePhoto(data);
- break;
- }
- super.onActivityResult(requestCode, resultCode, data);
- }
- final String SAVE_PATH = Environment.getExternalStorageDirectory() + "/my_head.jpg"; //拍照后保存路径 //保存图片 public void savePhoto(Intent it){
- Bundle bundle = it.getExtras();
- if (bundle != null) {
- Bitmap photo = bundle.getParcelable("data");
- imgHead.setImageBitmap(photo);
- File fileHead = new File(SAVE_PATH);
- try {
- if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
- if (!fileHead.getParentFile().exists()) {
- fileHead.getParentFile().mkdir();
- }
- BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(fileHead));
- photo.compress(Bitmap.CompressFormat.JPEG, 80, bos);
- bos.flush();
- bos.close();
- } else {
- Toast toast = Toast.makeText(HeadPhotoActivity.this, "保存失败!", Toast.LENGTH_SHORT);
- toast.setGravity(Gravity.CENTER, 0, 0);
- toast.show();
- }
- } catch(FileNotFoundException e) {
- e.printStackTrace();
- } catch(IOException e) {
- e.printStackTrace();
- }
- }
- }
第三步:上传图片代码
- String SERVER_URL = Config.PhotoAPI+"/UploadImage";//上传的服务端API地址btnHeadCancel.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View view) {
- new Thread(new Runnable() {
- @Override
- public void run() {
- File file = new File(SAVE_PATH);
- Message msg = new Message();
- msg.what = 0;
- if(file!=null) {
- try {
- int re = ImageUtils.uploadForm(file, SERVER_URL);
- msg.obj = re;
- } catch (IOException ex) {
- msg.obj = 0;
- Toast.makeText(HeadPhotoActivity.this, "上传失败", Toast.LENGTH_SHORT).show();
- }
- handler.sendMessage(msg);
- }else {
- Toast.makeText(HeadPhotoActivity.this, "找不到上传图片", Toast.LENGTH_SHORT).show();
- }
- }
- }).start();
- }
- });
- final Handler handler=new Handler(){
- @Override
- public void handleMessage(Message msg) {
- switch (msg.what) {
- case 0:
- if ((int)msg.obj == 1) {
- Toast.makeText(HeadPhotoActivity.this, "上传成功", Toast.LENGTH_SHORT).show();
- } else {
- Toast.makeText(HeadPhotoActivity.this, "上传失败", Toast.LENGTH_SHORT).show();
- }
- break;
- }
- }
- };
- /**
- *
- * @param uploadFile
- * 需要上传的文件
- * @param serverUrl
- * 上传的服务器的路径
- * @throws IOException
- */
- public static int uploadForm(File uploadFile, String serverUrl)
- throws IOException {
- int re=0;
- String fileName = uploadFile.getName();
- StringBuilder sb = new StringBuilder();
- sb.append("--" + BOUNDARY + "\r\n");
- sb.append("Content-Disposition: form-data; name=\"" + fileName
- + "\"; filename=\"" + fileName + "\"" + "\r\n");
- sb.append("Content-Type: image/jpeg" + "\r\n");
- sb.append("\r\n");
- byte[] headerInfo = sb.toString().getBytes("UTF-8");
- byte[] endInfo = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("UTF-8");
- System.out.println(sb.toString());
- URL url = new URL(serverUrl);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- conn.setRequestMethod("POST");
- conn.setRequestProperty("Content-Type",
- "multipart/form-data; boundary=" + BOUNDARY);
- conn.setRequestProperty("Content-Length", String
- .valueOf(headerInfo.length + uploadFile.length()
- + endInfo.length));
- conn.setDoOutput(true);
- OutputStream out = conn.getOutputStream();
- InputStream in = new FileInputStream(uploadFile);
- out.write(headerInfo);
- byte[] buf = new byte[1024];
- int len;
- while ((len = in.read(buf)) != -1)
- out.write(buf, 0, len);
- out.write(endInfo);
- in.close();
- out.close();
- if (conn.getResponseCode() == 200) {
- re=1;
- }
- return re;
- }
最后给出服务端WebAPI代码:
- [HttpPost]
- public async Task<HttpResponseMessage> UploadImage()
- {string filePath = "~\\UploadFiles\\Photo";
- // 取得文件夹
- string dir = HttpContext.Current.Server.MapPath(filePath);
- //如果不存在文件夹,就创建文件夹
- if (!Directory.Exists(dir))
- Directory.CreateDirectory(dir);
- if (!Request.Content.IsMimeMultipartContent("form-data"))
- {
- throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
- }
- var provider = new CustomMultipartFormDataStreamProvider(dir);
- try
- {
- // Read the form data.
- await Request.Content.ReadAsMultipartAsync(provider);
- foreach (MultipartFileData file in provider.FileData)
- {
- //file.Headers.ContentDisposition.FileName;//上传文件前的文件名
- //file.LocalFileName;//上传后的文件名
- Photo p = new Photo();
- p.ImgInfo = file.LocalFileName.Substring(file.LocalFileName.LastIndexOf("\\"));
- p.Sort = "员工相册";
- p.AddUser = "admin";
- p.AddTime = DateTime.Now;
- p.Url = filePath + p.ImgInfo;
- db.Photo.Add(p);
- db.SaveChanges();
- }
- return Request.CreateResponse(HttpStatusCode.OK); }
- catch
- {
- return Request.CreateResponse(HttpStatusCode.BadRequest); }
- }
- //重写上传文件名
- public class CustomMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
- {
- public CustomMultipartFormDataStreamProvider(string path)
- : base(path)
- { }
- public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers)
- {
- string fileName = DateTime.Now.ToString("yyyyMMddHHmmssfff");
- return fileName + "_" + headers.ContentDisposition.FileName.Replace("\"", string.Empty);//base.GetLocalFileName(headers);
- }
- }
来源: http://www.phperz.com/article/17/0918/348437.html