Yn：format change, and make sure the main thread
YN:backup for node information version0.1
YN：can show a list of nodes and the text
remove some useless files
YN:remove old db operation, use the new function
YN:node information version0.2--first step

can connect the database to show node's id and power--but should use
thread to let it be more fast when the number is big.
YN:use thread to show the node information

but the method has problems, now put it down, when having a problem, try
use a handler
YN:click node -can show the dialog
YN:remove the repeat of node show
YN:the first page complete

next do the dialog show
YN:backup

the things that can improve: node show time, donot parse the package int
the mainActivity, animation, music choose
YN:can show the node's package
YN:practice show the package using fragment-wrong
YN：use textview to replace fragment-correct

next :parse the package
YN:function complete
Merge remote-tracking branch 'origin/nodeInformation'
YN:merge