题目内容
The fragment implements the onCreateView() method, which gets called each time Android needs the fragment’s layout, and it’s where you say which layout the fragment uses.
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The onCreate() method gets called when the database needs to be upgraded.
You add data to the ContentValues object using its putExtra() method.
To insert multiple rows into a table, you need to make repeat calls to the insert() method.
To use the Handler, you wrap the code you wish to schedule in a Runnable object, and then use the Handler post() and postDelayed() methods to specify when you want the code to run.
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