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
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//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);
}
}
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