清算帐户去除数据 [英] Clearing data on account removal

问题描述

我要清除应用程序的数据，当用户手动删除从帐户与帐户;同步在设置应用程序的部分。

I want to clear the application's data when a user manually removes an account from the Accounts & sync section in the settings app.

我有我自己的实现 AbstractAccountAuthenticator ，但没有办法在删除帐户进程挂钩。任何提示？

I have my own implementation of AbstractAccountAuthenticator but there is no method to hook in the remove account process. Any hints?

推荐答案

我一直在琢磨同样的问题，这里的解决方案我决定的。这不是我称之为正确的解决方案，但它是最好的，我相信你可以使用目前的API管理。

I've been pondering on the same problem and here's the "solution" I decided upon. It's not what I'd call the "correct" solution but it's the best I believe you can manage with the current API.

在我实施 AbstractAccountAuthenticator 类，我已经重写了 getAccountRemovalAllowed 函数如下：

In my implementation of the AbstractAccountAuthenticator class, I've overriden the getAccountRemovalAllowed function as follows:

@Override
public Bundle getAccountRemovalAllowed(
        AccountAuthenticatorResponse response, Account account)
        throws NetworkErrorException {
    Bundle result = super.getAccountRemovalAllowed(response, account);

    if (result != null && result.containsKey(AccountManager.KEY_BOOLEAN_RESULT)
            && !result.containsKey(AccountManager.KEY_INTENT)) {
        final boolean removalAllowed = result.getBoolean(AccountManager.KEY_BOOLEAN_RESULT);

        if (removalAllowed) {
            // Do my removal stuff here
        }
    }

    return result;
}

有一个微小的机会，去除可能失败后您从 getAccountRemovalAllowed 返回，但它是可以忽略不计（恕我直言）。

There is a tiny chance that removal could fail AFTER you return from getAccountRemovalAllowed but it's negligible (IMHO).

由于MisterSquonk建议有，你可以听（ ACCOUNTS_CHANGED_INTENT ），但不幸的是，广播的意图时，帐户的修改的，并不只是当一个帐户的删除的。

As MisterSquonk suggested there is an Intent that you could listen for (ACCOUNTS_CHANGED_INTENT) but, unfortunately, it's broadcast when an account changes, and not just when an account is deleted.

我不明白为什么这不是SDK的一部分，但也许我们俩都错过了一些明显的！现在，我用这个办法坚持，因为我需要删除的帐户删除一些我自己的数据库表。

I don't understand why this isn't part of the SDK but maybe we've both missed something obvious! For now, I'm sticking with this approach as I need to delete some database tables of my own on account deletion.

我希望这有助于。

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