| /** |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.hardware.fingerprint; |
| |
| import android.content.ContentResolver; |
| import android.provider.Settings; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import com.android.internal.util.ArrayUtils; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Utility class for dealing with fingerprints and fingerprint settings. |
| * @hide |
| */ |
| public |
| class FingerprintUtils { |
| private static final boolean DEBUG = true; |
| private static final String TAG = "FingerprintUtils"; |
| |
| private static int[] toIntArray(List<Integer> list) { |
| if (list == null) { |
| return null; |
| } |
| int[] arr = new int[list.size()]; |
| int i = 0; |
| for (int elem : list) { |
| arr[i] = elem; |
| i++; |
| } |
| return arr; |
| } |
| |
| public static int[] getFingerprintIdsForUser(ContentResolver res, int userId) { |
| String fingerIdsRaw = Settings.Secure.getStringForUser(res, |
| Settings.Secure.USER_FINGERPRINT_IDS, userId); |
| ArrayList<Integer> tmp = new ArrayList<Integer>(); |
| if (!TextUtils.isEmpty(fingerIdsRaw)) { |
| String[] fingerStringIds = fingerIdsRaw.replace("[","").replace("]","").split(", "); |
| int length = fingerStringIds.length; |
| for (int i = 0; i < length; i++) { |
| try { |
| tmp.add(Integer.decode(fingerStringIds[i])); |
| } catch (NumberFormatException e) { |
| if (DEBUG) Log.w(TAG, "Error parsing finger id: '" + fingerStringIds[i] + "'"); |
| } |
| } |
| } |
| return toIntArray(tmp); |
| } |
| |
| public static void addFingerprintIdForUser(ContentResolver res, int fingerId, int userId) { |
| // FingerId 0 has special meaning. |
| if (fingerId == 0) { |
| Log.w(TAG, "Tried to add fingerId 0"); |
| return; |
| } |
| |
| int[] fingerIds = getFingerprintIdsForUser(res, userId); |
| |
| // Don't allow dups |
| if (ArrayUtils.contains(fingerIds, fingerId)) { |
| Log.w(TAG, "finger already added " + fingerId); |
| return; |
| } |
| int[] newList = Arrays.copyOf(fingerIds, fingerIds.length + 1); |
| newList[fingerIds.length] = fingerId; |
| Settings.Secure.putStringForUser(res, Settings.Secure.USER_FINGERPRINT_IDS, |
| Arrays.toString(newList), userId); |
| } |
| |
| public static boolean removeFingerprintIdForUser(int fingerId, ContentResolver res, int userId) |
| { |
| // FingerId 0 has special meaning. The HAL layer is supposed to remove each finger one |
| // at a time and invoke notify() for each fingerId. If we get called with 0 here, it means |
| // something bad has happened. |
| if (fingerId == 0) throw new IllegalArgumentException("fingerId can't be 0"); |
| |
| final int[] fingerIds = getFingerprintIdsForUser(res, userId); |
| if (ArrayUtils.contains(fingerIds, fingerId)) { |
| final int[] result = ArrayUtils.removeInt(fingerIds, fingerId); |
| Settings.Secure.putStringForUser(res, Settings.Secure.USER_FINGERPRINT_IDS, |
| Arrays.toString(result), userId); |
| return true; |
| } |
| return false; |
| } |
| |
| }; |
| |