How to force a content provider to reset when manually deleting database

In my app I have a ContentProvider attached to a table in a database with a CursorLoader that fills a ListView in one of my Activities. This table is filled empty by default and gets filled with user input data. I want to allow the user to completely delete all of their stored data and I'm deleting the entire database when this option is selected. The database is then recreated in it's default state when the user starts using the app again, just as it would the first time they used the app.

My issue is when I delete the database, the ContentProvider doesn't detect that the database was deleted and when I go back to my listview activity, the list is still there. I'm also making the app completely reload the ListView Activity instead of just resuming from memory and the list is still there even though the database is empty. The only way I can get the ContentProvider to reload is to kill the app in the system settings and then open it again.

Is there a way to forcefully restart the ContentProvider or to tell it that the data has been updated from outside of the ContentProvider class itself?

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您也可以简单地使用内容提供者的删除方法而不用定义选择：

context.getContentResolver().delete(YourProvider.CONTENT_URI, null, null);

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I found the solution to my problem here: https://stackoverflow.com/a/8235584/1943155

I was getting my dbHelper in the onCreate of my ContentProvider class just like in the other post and getting a new dbHelper in each method fixed my issue.

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You want to populate the listview with a cursorAdapter, and notify the cursor when the content changed in the contentProvider.

In your delete method of your contentProvider implementation, call contentResolver.notify . This will notify the cursor populated by the call to contentResolver that there has been a change in the data.

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