Intent.ACTION
To remember the most useful action of intent, I summarize & record it here.
ACTION_MAIN:
Activity Action: Start as a main entry point, does not expect to receive data.
ACTION_SEARCH:
Activity Action: Perform a web search.
You can use method getStringExtra(SearchManager.QUERY) to get the text to search for. If empty, simply enter your search results Activity with the search UI activated.
ACTION_WEB_SEARCH:
Activity Action: Perform a web search.
You can use method getStringExtra(SearchManager.QUERY) to get the text to search for. If it is a url starts with http or https, the site will be opened.
If it is plain text, Google search will be applied.
ACTION_CREATE_SHORTCUT:
Activity Action: Create a shortcut.
An Intent representing the shortcut. The intent must contain three extras:SHORTCUT_INTENT(value:Intent)，SHORT_NAME(value:String)
and SHORTCUT_ICON(value:Bitmap) or SHORTCUT_ICON_RESOURCE(value:ShortcutIconResource).