| /* |
| * Copyright (C) 2017 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 com.android.wallpaper.util; |
| |
| import android.content.Context; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.graphics.Point; |
| import android.os.Build.VERSION; |
| import android.os.Build.VERSION_CODES; |
| import android.util.Log; |
| import android.view.Display; |
| import android.view.WindowManager; |
| |
| /** |
| * Calculates the size of the device's screen. |
| */ |
| public class ScreenSizeCalculator { |
| |
| private static final String TAG = "ScreenSizeCalculator"; |
| |
| private static ScreenSizeCalculator sInstance; |
| |
| private Point mPortraitScreenSize; |
| private Point mLandscapeScreenSize; |
| |
| public static ScreenSizeCalculator getInstance() { |
| if (sInstance == null) { |
| sInstance = new ScreenSizeCalculator(); |
| } |
| return sInstance; |
| } |
| |
| /** |
| * Clears the static instance of ScreenSizeCalculator. Used in test when display metrics are |
| * manipulated between test cases. |
| */ |
| static void clearInstance() { |
| sInstance = null; |
| } |
| |
| /** |
| * Calculates the device's screen size, in physical pixels. |
| * |
| * @return Screen size unadjusted for window decor or compatibility scale factors if API level is |
| * 17+, otherwise return adjusted screen size. In both cases, returns size in units of |
| * physical pixels. |
| */ |
| public Point getScreenSize(Display display) { |
| switch (Resources.getSystem().getConfiguration().orientation) { |
| case Configuration.ORIENTATION_PORTRAIT: |
| return getPortraitScreenSize(display); |
| case Configuration.ORIENTATION_LANDSCAPE: |
| return getLandscapeScreenSize(display); |
| default: |
| Log.e(TAG, "Unknown device orientation: " |
| + Resources.getSystem().getConfiguration().orientation); |
| return getPortraitScreenSize(display); |
| } |
| } |
| |
| /** |
| * Calculates the device's aspect ratio (height/width). |
| * |
| * Note: The screen size is getting from {@link #getScreenSize}. |
| */ |
| public float getScreenAspectRatio(Context context) { |
| final WindowManager windowManager = context.getSystemService(WindowManager.class); |
| final Point screenSize = getScreenSize(windowManager.getDefaultDisplay()); |
| return (float) screenSize.y / screenSize.x; |
| } |
| |
| private Point getPortraitScreenSize(Display display) { |
| if (mPortraitScreenSize == null) { |
| mPortraitScreenSize = new Point(); |
| } |
| writeDisplaySizeToPoint(display, mPortraitScreenSize); |
| return mPortraitScreenSize; |
| } |
| |
| private Point getLandscapeScreenSize(Display display) { |
| if (mLandscapeScreenSize == null) { |
| mLandscapeScreenSize = new Point(); |
| } |
| writeDisplaySizeToPoint(display, mLandscapeScreenSize); |
| return mLandscapeScreenSize; |
| } |
| |
| /** |
| * Writes the screen size of the provided display object to the provided Point object. |
| */ |
| private void writeDisplaySizeToPoint(Display display, Point outPoint) { |
| if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1) { |
| display.getRealSize(outPoint); |
| } else { |
| display.getSize(outPoint); |
| } |
| } |
| } |