81 lines
2.8 KiB
Java
81 lines
2.8 KiB
Java
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/*
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* Copyright (C) 2016 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.android.inputmethod.compat;
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import android.content.Context;
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import android.os.Build;
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import android.os.UserManager;
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import android.support.annotation.IntDef;
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import java.lang.annotation.Retention;
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import java.lang.reflect.Method;
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import static java.lang.annotation.RetentionPolicy.SOURCE;
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/**
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* A temporary solution until {@code UserManagerCompat.isUserUnlocked()} in the support-v4 library
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* becomes publicly available.
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*/
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public final class UserManagerCompatUtils {
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private static final Method METHOD_isUserUnlocked;
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static {
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// We do not try to search the method in Android M and prior.
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if (BuildCompatUtils.EFFECTIVE_SDK_INT <= Build.VERSION_CODES.M) {
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METHOD_isUserUnlocked = null;
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} else {
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METHOD_isUserUnlocked = CompatUtils.getMethod(UserManager.class, "isUserUnlocked");
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}
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}
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private UserManagerCompatUtils() {
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// This utility class is not publicly instantiable.
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}
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public static final int LOCK_STATE_UNKNOWN = 0;
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public static final int LOCK_STATE_UNLOCKED = 1;
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public static final int LOCK_STATE_LOCKED = 2;
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@Retention(SOURCE)
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@IntDef({LOCK_STATE_UNKNOWN, LOCK_STATE_UNLOCKED, LOCK_STATE_LOCKED})
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public @interface LockState {}
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/**
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* Check if the calling user is running in an "unlocked" state. A user is unlocked only after
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* they've entered their credentials (such as a lock pattern or PIN), and credential-encrypted
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* private app data storage is available.
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* @param context context from which {@link UserManager} should be obtained.
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* @return One of {@link LockState}.
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*/
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@LockState
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public static int getUserLockState(final Context context) {
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if (METHOD_isUserUnlocked == null) {
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return LOCK_STATE_UNKNOWN;
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}
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final UserManager userManager = context.getSystemService(UserManager.class);
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if (userManager == null) {
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return LOCK_STATE_UNKNOWN;
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}
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final Boolean result =
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(Boolean) CompatUtils.invoke(userManager, null, METHOD_isUserUnlocked);
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if (result == null) {
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return LOCK_STATE_UNKNOWN;
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}
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return result ? LOCK_STATE_UNLOCKED : LOCK_STATE_LOCKED;
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}
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}
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