feat(policy): check enable password helper

app/src/main/java/org/flyve/mdm/agent/utils/DeviceLockedHelper.java

@@ -0,0 +1,91 @@
+package org.flyve.mdm.agent.utils;
+
+import android.annotation.TargetApi;
+import android.app.KeyguardManager;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.os.Build;
+import android.provider.Settings;
+
+/*
+ *   Copyright © 2017 Teclib. All rights reserved.
+ *
+ *   This file is part of flyve-mdm-android
+ *
+ * flyve-mdm-android is a subproject of Flyve MDM. Flyve MDM is a mobile
+ * device management software.
+ *
+ * Flyve MDM is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * Flyve MDM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * ------------------------------------------------------------------------------
+ * @author    Rafael Hernandez
+ * @date      28/12/17
+ * @copyright Copyright © 2017 Teclib. All rights reserved.
+ * @license   GPLv3 https://www.gnu.org/licenses/gpl-3.0.html
+ * @link      https://github.com/flyve-mdm/flyve-mdm-android
+ * @link      https://flyve-mdm.com
+ * ------------------------------------------------------------------------------
+ */
+public class DeviceLockedHelper {
+
+    private Context context;
+
+    public DeviceLockedHelper(Context context) {
+        this.context = context;
+    }
+
+    public boolean isDeviceScreenLocked() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            return isDeviceLocked();
+        } else {
+            return isPatternSet() || isPassOrPinSet();
+        }
+    }
+
+    /**
+     * @return true if pattern set, false if not (or if an issue when checking)
+     */
+    private boolean isPatternSet() {
+        ContentResolver cr = context.getContentResolver();
+        try {
+            int lockPatternEnable = Settings.Secure.getInt(cr, Settings.Secure.LOCK_PATTERN_ENABLED);
+            return lockPatternEnable == 1;
+        } catch (Settings.SettingNotFoundException e) {
+            return false;
+        }
+    }
+
+    /**
+     * @return true if pass or pin set
+     */
+    private boolean isPassOrPinSet() {
+        try {
+            KeyguardManager keyguardManager = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE); //api 16+
+            return keyguardManager.isKeyguardSecure();
+        } catch (Exception ex) {
+            FlyveLog.e(ex.getMessage());
+            return false;
+        }
+    }
+
+    /**
+     * @return true if pass or pin or pattern loacks screen
+     */
+    @TargetApi(23)
+    private boolean isDeviceLocked() {
+        try {
+            KeyguardManager keyguardManager = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE); //api 23+
+            return keyguardManager.isDeviceSecure();
+        } catch (Exception ex) {
+         FlyveLog.e(ex.getMessage());
+            return false;
+        }
+    }
+}