Android仿支付宝手势密码解锁功能

/**  * 保存手势密码  */ private void saveChosenPattern(List<LockPatternView.Cell> cells) {  byte[] bytes = LockPatternUtil.patternToHash(cells); aCache.put(Constant.GESTURE_PASSWORD, bytes);}

/**  * Generate an SHA-1 hash for the pattern. * Not the most secure, but it is at  * least a second level of protection. First level is that the file is in a  * location only readable by the system process.* * @param pattern  * @return the hash of the pattern in a byte array.  */public static byte[] patternToHash(List<LockPatternView.Cell> pattern) {   if (pattern == null) {     return null;  } else {    int size = pattern.size();     byte[] res = new byte[size];    for (int i = 0; i < size; i++) {      LockPatternView.Cell cell = pattern.get(i);    res[i] = (byte) cell.getIndex();   }     MessageDigest md = null;   try {    md = MessageDigest.getInstance("SHA-1");       return md.digest(res);    } catch (NoSuchAlgorithmException e) {    e.printStackTrace();       return res;   }  } }

/** * Set whether the view will use tactile feedback.  *If true, there will be  * tactile feedback as the user enters the pattern.  * @param tactileFeedbackEnabled Whether tactile feedback is enabled  */ public void setTactileFeedbackEnabled(boolean tactileFeedbackEnabled) { mEnableHapticFeedback = tactileFeedbackEnabled;}

/**  * Set whether the view is in stealth mode. If true, there will be no  * visible feedback as the user enters the pattern.  * @param inStealthMode Whether in stealth mode.  */public void setInStealthMode(boolean inStealthMode) { mInStealthMode = inStealthMode;}