我在当前项目的某个部分遇到了麻烦,觉得我现在被卡住了.我正在尝试使用HTTP帖子和多部分表单数据进行视频上传.我觉得我在理解HTTP协议,特别是多部分表单数据方面遇到了障碍.
我有一个以http://videoupload.thecompany.com/VideoApp.xml?method=upload&objectType=person&objectId=777777格式上传视频的URL.我还需要包含标题,说明和视频文件.这些是“多部分数据”吗？
我已经尝试调整此解决方案以满足我的需求Upload video from Android to server?,并在所有其他conn.setRequestproperty()调用之后设置额外数据,如下所示：
conn.setRequestProperty("title","video title");
conn.setRequestProperty("description","video description");
但这不适合我.这段代码的原始作者发表评论,以便在以后添加大约30行的多部分表单数据,但我不明白为什么.谢谢你的帮助.
解决方法
这是我提出的两步解决方案,主要来自于
here发现的信息和链接.这个解决方案比一些相关的SO帖子中的upload2server()方法更容易掌握.希望这有助于其他人.
1)从库中选择视频文件.
创建变量private static final int SELECT_VIDEO = 3; – 你使用的是什么号码并不重要,只要这是你稍后检查的号码.然后,使用意图选择视频.
Intent intent = new Intent();
intent.setType("video/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select a Video "),SELECT_VIDEO);
使用onActivityResult()启动uploadVideo()方法.
public void onActivityResult(int requestCode,int resultCode,Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_VIDEO) {
System.out.println("SELECT_VIDEO");
Uri selectedVideoUri = data.getData();
selectedpath = getPath(selectedVideoUri);
System.out.println("SELECT_VIDEO Path : " + selectedpath);
uploadVideo(selectedpath);
}
}
}
private String getPath(Uri uri) {
String[] projection = { MediaStore.Video.Media.DATA,MediaStore.Video.Media.SIZE,MediaStore.Video.Media.DURATION};
Cursor cursor = managedQuery(uri,projection,null,null);
cursor.movetoFirst();
String filePath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));
int fileSize = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE));
long duration = TimeUnit.MILLISECONDS.toSeconds(cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION)));
//some extra potentially useful data to help with filtering if necessary
System.out.println("size: " + fileSize);
System.out.println("path: " + filePath);
System.out.println("duration: " + duration);
return filePath;
}
2)转到http://hc.apache.org/downloads.cgi,下载最新的HttpClient jar,将其添加到您的项目中,并使用以下方法上传视频：
private void uploadVideo(String videoPath) throws ParseException,IOException {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(YOUR_URL);
FileBody filebodyVideo = new FileBody(new File(videoPath));
StringBody title = new StringBody("Filename: " + videoPath);
StringBody description = new StringBody("This is a description of the video");
multipartentity reqEntity = new multipartentity();
reqEntity.addPart("videoFile",filebodyVideo);
reqEntity.addPart("title",title);
reqEntity.addPart("description",description);
httppost.setEntity(reqEntity);
// DEBUG
System.out.println( "executing request " + httppost.getRequestLine( ) );
HttpResponse response = httpclient.execute( httppost );
httpentity resEntity = response.getEntity( );
// DEBUG
System.out.println( response.getStatusLine( ) );
if (resEntity != null) {
System.out.println( EntityUtils.toString( resEntity ) );
} // end if
if (resEntity != null) {
resEntity.consumeContent( );
} // end if
httpclient.getConnectionManager( ).shutdown( );
} // end of uploadVideo( )
一旦你工作了,你可能想把它放在一个线程中并添加一个上传对话框,但这会让你开始.我在尝试upload2Server()方法失败后为我工作.这也适用于图像和音频,只需稍微调整一下.