How can i achive file upload dialog box in android through java or xml layout

Im new to android, developing a social networki开发者_开发知识库ng application which requires user to upload images, but i dont know how to achive the file upload dialog box. How can we achive it,using java file or xml layout file?

The uploading file can be viewed as the set of actions

1. Browse for file
2. Select file for upload
3. Upload file

So you need to combine these 3 steps to upload file.

If you are curious about actual upload - here is the link on example