锁屏界面 google账号解锁

android4.4以前的就有这个功能：

Android自定义账户类型和同步适配器模式 Custom Account Type & SyncAdapter

http://blog.csdn.net/w804518214/article/details/52820878

检查账号密码

android\frameworks\base\core\java\android\accounts\AccountManager.java

/**
 * Confirms that the user knows the password for an account to make extra
 * sure they are the owner of the account. The user-entered password can
 * be supplied directly, otherwise the authenticator for this account type
 * prompts the user with the appropriate interface. This method is
 * intended for applications which want extra assurance; for example, the
 * phone lock screen uses this to let the user unlock the phone with an
 * account password if they forget the lock pattern.
 *
 * If the user-entered password matches a saved password for this
 * account, the request is considered valid; otherwise the authenticator
 * verifies the password (usually by contacting the server).
 *
 * This method may be called from any thread, but the returned
 * {@link AccountManagerFuture} must not be used on the main thread.

*
 * NOTE: If targeting your app to work on API level 22 and before,
 * MANAGE_ACCOUNTS permission is needed for those platforms. See docs
 * for this function in API level 22.
 *
 * @param account The account to confirm password knowledge for
 * @param options Authenticator-specific options for the request;
 * if the {@link #KEY_PASSWORD} string field is present, the
 * authenticator may use it directly rather than prompting the user;
 * may be null or empty
 * @param activity The {@link Activity} context to use for launching a new
 * authenticator-defined sub-Activity to prompt the user to enter a
 * password; used only to call startActivity(); if null, the prompt
 * will not be launched directly, but the necessary {@link Intent}
 * will be returned to the caller instead
 * @param callback Callback to invoke when the request completes,
 * null for no callback
 * @param handler {@link Handler} identifying the callback thread,
 * null for the main thread
 * @return An {@link AccountManagerFuture} which resolves to a Bundle
 * with these fields if activity or password was supplied and
 * the account was successfully verified:
 * <ul>
 * <li> {@link #KEY_ACCOUNT_NAME} - the name of the account verified
 * <li> {@link #KEY_ACCOUNT_TYPE} - the type of the account
 * <li> {@link #KEY_BOOLEAN_RESULT} - true to indicate success
 * </ul>
 *
 * If no activity or password was specified, the returned Bundle contains
 * {@link #KEY_INTENT} with the {@link Intent} needed to launch the
 * password prompt.
 *
 * Also the returning Bundle may contain {@link
 * #KEY_LAST_AUTHENTICATED_TIME} indicating the last time the
 * credential was validated/created.

*
 * If an error occurred,{@link AccountManagerFuture#getResult()} throws:
 * <ul>
 * <li> {@link AuthenticatorException} if the authenticator failed to respond
 * <li> {@link OperationCanceledException} if the operation was canceled for
 * any reason, including the user canceling the password prompt
 * <li> {@link IOException} if the authenticator experienced an I/O problem
 * verifying the password, usually because of network trouble
 * </ul>
 */
 public AccountManagerFuture<Bundle> confirmCredentials(final Account account,
 final Bundle options,
 final Activity activity,
 final AccountManagerCallback<Bundle> callback,
 final Handler handler) {
 return confirmCredentialsAsUser(account, options, activity, callback, handler,
 Process.myUserHandle());
 }

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锁屏界面 google账号解锁

Android自定义账户类型和同步适配器模式 Custom Account Type & SyncAdapter

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