utils: Introduce ScreenType class

Change-Id: I6ddb14d6228565331d52069f4d96f93a9d306b45

src/java/org/cyanogenmod/internal/util/ScreenType.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2015 The CyanogenMod 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 org.cyanogenmod.internal.util;
+
+import android.content.Context;
+import android.util.DisplayMetrics;
+import android.view.DisplayInfo;
+import android.view.WindowManager;
+
+public class ScreenType {
+    // Device type reference
+    private static int sDeviceType = -1;
+
+    // Device types
+    private static final int DEVICE_PHONE = 0;
+    private static final int DEVICE_HYBRID = 1;
+    private static final int DEVICE_TABLET = 2;
+
+    private static int getScreenType(Context context) {
+        if (sDeviceType == -1) {
+            WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+            DisplayInfo outDisplayInfo = new DisplayInfo();
+            wm.getDefaultDisplay().getDisplayInfo(outDisplayInfo);
+            int shortSize = Math.min(outDisplayInfo.logicalHeight, outDisplayInfo.logicalWidth);
+            int shortSizeDp = shortSize * DisplayMetrics.DENSITY_DEFAULT
+                    / outDisplayInfo.logicalDensityDpi;
+            if (shortSizeDp < 600) {
+                // 0-599dp: "phone" UI with a separate status & navigation bar
+                sDeviceType =  DEVICE_PHONE;
+            } else if (shortSizeDp < 720) {
+                // 600-719dp: "phone" UI with modifications for larger screens
+                sDeviceType = DEVICE_HYBRID;
+            } else {
+                // 720dp: "tablet" UI with a single combined status & navigation bar
+                sDeviceType = DEVICE_TABLET;
+            }
+        }
+        return sDeviceType;
+    }
+
+    public static boolean isPhone(Context context) {
+        return getScreenType(context) == DEVICE_PHONE;
+    }
+
+    public static boolean isHybrid(Context context) {
+        return getScreenType(context) == DEVICE_HYBRID;
+    }
+
+    public static boolean isTablet(Context context) {
+        return getScreenType(context) == DEVICE_TABLET;
+    }
+}