Display name of user @return display name

Load image into avatar's ImageView. @param avatarImageView Avatar's ImageView. @param string A file path, or a uri or url.

@param index Index into the color array of the color to display in the progress spinner.

Capture a still picture. This method should be called when we get a response in {@link #mCaptureCallback} from both {@link #lockFocus()}.

Helper method that simply checks the Matrix, and then displays the result

@return The amount the progress spinner is currently rotated, between [0..1].

@param position 相对于当前表情集的位置

Recover screen

Trigger send button animation @param sendBtn send button @param hasContent EditText has content or photos have been selected @param isSelect

If messages in list is sorted chronologically, for example, messages[0].timeString < messages[1].timeString. To load last page of messages from histor

根据key来获取内存中的图片 @param key path @return bitmap

@return true if the ImageView exists, and it's Drawable existss