1 /** 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.server.fingerprint; 18 19 import android.content.Context; 20 import android.hardware.fingerprint.Fingerprint; 21 import android.os.Vibrator; 22 import android.text.TextUtils; 23 import android.util.SparseArray; 24 25 import com.android.internal.annotations.GuardedBy; 26 27 import java.util.List; 28 29 /** 30 * Utility class for dealing with fingerprints and fingerprint settings. 31 */ 32 public class FingerprintUtils { 33 34 private static final long[] FP_ERROR_VIBRATE_PATTERN = new long[] {0, 30, 100, 30}; 35 private static final long[] FP_SUCCESS_VIBRATE_PATTERN = new long[] {0, 30}; 36 37 private static final Object sInstanceLock = new Object(); 38 private static FingerprintUtils sInstance; 39 40 @GuardedBy("this") 41 private final SparseArray<FingerprintsUserState> mUsers = new SparseArray<>(); 42 43 public static FingerprintUtils getInstance() { 44 synchronized (sInstanceLock) { 45 if (sInstance == null) { 46 sInstance = new FingerprintUtils(); 47 } 48 } 49 return sInstance; 50 } 51 52 private FingerprintUtils() { 53 } 54 55 public List<Fingerprint> getFingerprintsForUser(Context ctx, int userId) { 56 return getStateForUser(ctx, userId).getFingerprints(); 57 } 58 59 public void addFingerprintForUser(Context ctx, int fingerId, int userId) { 60 getStateForUser(ctx, userId).addFingerprint(fingerId, userId); 61 } 62 63 public void removeFingerprintIdForUser(Context ctx, int fingerId, int userId) { 64 getStateForUser(ctx, userId).removeFingerprint(fingerId); 65 } 66 67 public void renameFingerprintForUser(Context ctx, int fingerId, int userId, CharSequence name) { 68 if (TextUtils.isEmpty(name)) { 69 // Don't do the rename if it's empty 70 return; 71 } 72 getStateForUser(ctx, userId).renameFingerprint(fingerId, name); 73 } 74 75 public static void vibrateFingerprintError(Context context) { 76 Vibrator vibrator = context.getSystemService(Vibrator.class); 77 if (vibrator != null) { 78 vibrator.vibrate(FP_ERROR_VIBRATE_PATTERN, -1); 79 } 80 } 81 82 public static void vibrateFingerprintSuccess(Context context) { 83 Vibrator vibrator = context.getSystemService(Vibrator.class); 84 if (vibrator != null) { 85 vibrator.vibrate(FP_SUCCESS_VIBRATE_PATTERN, -1); 86 } 87 } 88 89 private FingerprintsUserState getStateForUser(Context ctx, int userId) { 90 synchronized (this) { 91 FingerprintsUserState state = mUsers.get(userId); 92 if (state == null) { 93 state = new FingerprintsUserState(ctx, userId); 94 mUsers.put(userId, state); 95 } 96 return state; 97 } 98 } 99 } 100 101
