keyguard 锁屏 密码等

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LockPatternView.java

    /**  是否隐藏（不可见）密码
     * 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;
    }

KeyguardPatternView.java

    @Override
    public void reset() {
        // reset lock pattern
        mLockPatternView.setInStealthMode(!mLockPatternUtils.isVisiblePatternEnabled(
                KeyguardUpdateMonitor.getCurrentUser()));
        mLockPatternView.enableInput();
        mLockPatternView.setEnabled(true);
        mLockPatternView.clearPattern();

        // if the user is currently locked out, enforce it.
        long deadline = mLockPatternUtils.getLockoutAttemptDeadline(
                KeyguardUpdateMonitor.getCurrentUser());
        if (deadline != 0) {
            handleAttemptLockout(deadline);
        } else {
            displayDefaultSecurityMessage();
        }
    }
setInStealthMode(!mLockPatternUtils.isVisiblePatternEnabled(
                KeyguardUpdateMonitor.getCurrentUser()));
        mLockPatternView.enableInput();
        mLockPatternView.setEnabled(true);
        mLockPatternView.clearPattern();

        // if the user is currently locked out, enforce it.
        long deadline = mLockPatternUtils.getLockoutAttemptDeadline(
                KeyguardUpdateMonitor.getCurrentUser());
        if (deadline != 0) {
            handleAttemptLockout(deadline);
        } else {
            displayDefaultSecurityMessage();
        }
    }

LockPatternUtils.java

    /**
     * @return Whether the visible pattern is enabled.
     */
    public boolean isVisiblePatternEnabled(int userId) {
        return getBoolean(Settings.Secure.LOCK_PATTERN_VISIBLE, false, userId);
    }

    /**
     * Set whether the visible pattern is enabled.
     */
    public void setVisiblePatternEnabled(boolean enabled, int userId) {
        setBoolean(Settings.Secure.LOCK_PATTERN_VISIBLE, enabled, userId);

        // Update for crypto if owner
        if (userId != UserHandle.USER_SYSTEM) {
            return;
        }

        IBinder service = ServiceManager.getService("mount");
        if (service == null) {
            Log.e(TAG, "Could not find the mount service to update the user info");
            return;
        }

        IMountService mountService = IMountService.Stub.asInterface(service);
        try {
            mountService.setField(StorageManager.PATTERN_VISIBLE_KEY, enabled ? "1" : "0");
        } catch (RemoteException e) {
            Log.e(TAG, "Error changing pattern visible state", e);
        }
    }


   private void setBoolean(String secureSettingKey, boolean enabled, int userId) {
        try {
            getLockSettings().setBoolean(secureSettingKey, enabled, userId);
        } catch (RemoteException re) {
            // What can we do?
            Log.e(TAG, "Couldn't write boolean " + secureSettingKey + re);
        }
    } 
//LockSettingsService.java
    private ILockSettings getLockSettings() {
        if (mLockSettingsService == null) {
            ILockSettings service = ILockSettings.Stub.asInterface(
                    ServiceManager.getService("lock_settings"));
            mLockSettingsService = service;
        }
        return mLockSettingsService;
    }


LOCK_PATTERN_VISIBLE, false, userId);
    }

    /**
     * Set whether the visible pattern is enabled.
     */
    public void setVisiblePatternEnabled(boolean enabled, int userId) {
        setBoolean(Settings.Secure.LOCK_PATTERN_VISIBLE, enabled, userId);

        // Update for crypto if owner
        if (userId != UserHandle.USER_SYSTEM) {
            return;
        }

        IBinder service = ServiceManager.getService("mount");
        if (service == null) {
            Log.e(TAG, "Could not find the mount service to update the user info");
            return;
        }

        IMountService mountService = IMountService.Stub.asInterface(service);
        try {
            mountService.setField(StorageManager.PATTERN_VISIBLE_KEY, enabled ? "1" : "0");
        } catch (RemoteException e) {
            Log.e(TAG, "Error changing pattern visible state", e);
        }
    }


   private void setBoolean(String secureSettingKey, boolean enabled, int userId) {
        try {
            getLockSettings().setBoolean(secureSettingKey, enabled, userId);
        } catch (RemoteException re) {
            // What can we do?
            Log.e(TAG, "Couldn't write boolean " + secureSettingKey + re);
        }
    } 
//LockSettingsService.java
    private ILockSettings getLockSettings() {
        if (mLockSettingsService == null) {
            ILockSettings service = ILockSettings.Stub.asInterface(
                    ServiceManager.getService("lock_settings"));
            mLockSettingsService = service;
        }
        return mLockSettingsService;
    }

SecuritySettings.java

    public static class SecuritySubSettings extends SettingsPreferenceFragment
            implements OnPreferenceChangeListener {


        @Override
        public boolean onPreferenceChange(Preference preference, Object value) {
            String key = preference.getKey();
            if (KEY_POWER_INSTANTLY_LOCKS.equals(key)) {
                mLockPatternUtils.setPowerButtonInstantlyLocks((Boolean) value, MY_USER_ID);
            } else if (KEY_LOCK_AFTER_TIMEOUT.equals(key)) {
                int timeout = Integer.parseInt((String) value);
                try {
                    Settings.Secure.putInt(getContentResolver(),
                            Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, timeout);
                } catch (NumberFormatException e) {
                    Log.e("SecuritySettings", "could not persist lockAfter timeout setting", e);
                }
                setupLockAfterPreference();
                updateLockAfterPreferenceSummary();
            } else if (KEY_VISIBLE_PATTERN.equals(key)) {
                mLockPatternUtils.setVisiblePatternEnabled((Boolean) value, MY_USER_ID);
            }
            return true;
        }
    }SecuritySubSettings extends SettingsPreferenceFragment
            implements OnPreferenceChangeListener {


        @Override
        public boolean onPreferenceChange(Preference preference, Object value) {
            String key = preference.getKey();
            if (KEY_POWER_INSTANTLY_LOCKS.equals(key)) {
                mLockPatternUtils.setPowerButtonInstantlyLocks((Boolean) value, MY_USER_ID);
            } else if (KEY_LOCK_AFTER_TIMEOUT.equals(key)) {
                int timeout = Integer.parseInt((String) value);
                try {
                    Settings.Secure.putInt(getContentResolver(),
                            Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, timeout);
                } catch (NumberFormatException e) {
                    Log.e("SecuritySettings", "could not persist lockAfter timeout setting", e);
                }
                setupLockAfterPreference();
                updateLockAfterPreferenceSummary();
            } else if (KEY_VISIBLE_PATTERN.equals(key)) {
                mLockPatternUtils.setVisiblePatternEnabled((Boolean) value, MY_USER_ID);
            }
            return true;
        }
    }