Commit "Manager Your App Memory" Post
Compile Book For Post: "Manager Your App Memory"
Commit Post "Intent"
Compile Books For Post  - "Intent"
Test Image Change Path
Update Image Reference
Commit Post: "audio"
Commit post : "monitor device state"
Commit Post "Efficient Download"
Commit Post "Sharing"
Commit Post "back up api"
Commit Post "network ops"
Update Readme
Compile Books
Update README: multiscreen is claimed by riverfeng
Update Readme : insert picture method and doc download link
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fragment部分完成
fragment OK