64 lines
1.8 KiB
Java
64 lines
1.8 KiB
Java
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.widget.lockpattern;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Utilities for the lock pattern and its settings.
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*/
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public class LockPatternUtils {
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/**
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* Deserialize a pattern.
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*
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* @param string The pattern serialized with {@link #patternToString}
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* @return The pattern.
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*/
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public static List<LockPatternView.Cell> stringToPattern(String string) {
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List<LockPatternView.Cell> result = new ArrayList<>();
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final byte[] bytes = string.getBytes();
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for (byte b : bytes) {
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result.add(LockPatternView.Cell.of(b / 3, b % 3));
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}
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return result;
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}
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/**
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* Serialize a pattern.
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*
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* @param pattern The pattern.
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* @return The pattern in string form.
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*/
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public static String patternToString(List<LockPatternView.Cell> pattern) {
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if (pattern == null) {
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return "";
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}
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final int patternSize = pattern.size();
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byte[] res = new byte[patternSize];
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for (int i = 0; i < patternSize; i++) {
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LockPatternView.Cell cell = pattern.get(i);
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res[i] = (byte) (cell.getRow() * 3 + cell.getColumn());
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}
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return new String(res);
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}
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}
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