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POProblem using android.accounts Authenticator
 

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    <p>I'm new to the android.accounts apis, and now I'm trying to do something with them but a seemly dummy problem occurs...<br> I`ve created an Authenticator for my app but did not yet implement the abstract methods. The icon of it successfully appears in the system Add a Account window, and I know that when I click it, the method addAccount in the Authenticator will be invoked. </p> <p>Now I wish to do some simple thing in this method, and write codes below: </p> <pre><code> @Override public Bundle addAccount(AccountAuthenticatorResponse response, String accountType, String authTokenType, String[] requiredFeatures, Bundle options) { Log.d(LOG_TAG, "RRAuthenticator add account... "); String accountName = "example@example.com"; Account account = new Account(accountName, accountType); String password = "example_password"; AccountManager manager = AccountManager.get(context); manager.addAccountExplicitly(account, password, null); Bundle bundle = new Bundle(); bundle.putString(AccountManager.KEY_ACCOUNT_NAME, accountName); bundle.putString(AccountManager.KEY_ACCOUNT_TYPE, accountType); bundle.putString(AccountManager.KEY_AUTHTOKEN, "example_authtoken"); return bundle; } </code></pre> <p>I've seen the demo of SampleSyncAdapter, and make moves like it. But I practice using these APIs by directly adding an account. But system crashed by the line <code>manager.addAccountExplicitly(account, password, null);</code> What's wrong with it?</p> <hr> <p>Added later: Exception in system process. System will crash. NullPointerException throw by AccountManager. It seems the problem of the addAccountExplicitly method, as I comment this statement no crash happen.</p>
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    1. COany Logcat logs?
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    2. COPlease check my last edit.
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