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      1 /*
      2  * Copyright (C) 2016 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.launcher3.dynamicui;
     18 
     19 import android.app.IntentService;
     20 import android.app.WallpaperManager;
     21 import android.content.Intent;
     22 import android.graphics.Bitmap;
     23 import android.graphics.drawable.BitmapDrawable;
     24 import android.os.Bundle;
     25 import android.support.v7.graphics.Palette;
     26 
     27 import com.android.launcher3.LauncherProvider;
     28 import com.android.launcher3.LauncherSettings;
     29 import com.android.launcher3.R;
     30 import com.android.launcher3.config.FeatureFlags;
     31 
     32 /**
     33  * Extracts colors from the wallpaper, and saves results to {@link LauncherProvider}.
     34  */
     35 public class ColorExtractionService extends IntentService {
     36 
     37     /** The fraction of the wallpaper to extract colors for use on the hotseat. */
     38     private static final float HOTSEAT_FRACTION = 1f / 4;
     39 
     40     public ColorExtractionService() {
     41         super("ColorExtractionService");
     42     }
     43 
     44     @Override
     45     protected void onHandleIntent(Intent intent) {
     46         WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
     47         int wallpaperId = ExtractionUtils.getWallpaperId(wallpaperManager);
     48         ExtractedColors extractedColors = new ExtractedColors();
     49         if (wallpaperManager.getWallpaperInfo() != null) {
     50             // We can't extract colors from live wallpapers, so just use the default color always.
     51             extractedColors.updatePalette(null);
     52             extractedColors.updateHotseatPalette(null);
     53         } else {
     54             Bitmap wallpaper = ((BitmapDrawable) wallpaperManager.getDrawable()).getBitmap();
     55             Palette palette = Palette.from(wallpaper).generate();
     56             extractedColors.updatePalette(palette);
     57             // We extract colors for the hotseat and status bar separately,
     58             // since they only consider part of the wallpaper.
     59             Palette hotseatPalette = Palette.from(wallpaper)
     60                     .setRegion(0, (int) (wallpaper.getHeight() * (1f - HOTSEAT_FRACTION)),
     61                             wallpaper.getWidth(), wallpaper.getHeight())
     62                     .clearFilters()
     63                     .generate();
     64             extractedColors.updateHotseatPalette(hotseatPalette);
     65 
     66             if (FeatureFlags.LIGHT_STATUS_BAR) {
     67                 int statusBarHeight = getResources()
     68                         .getDimensionPixelSize(R.dimen.status_bar_height);
     69                 Palette statusBarPalette = Palette.from(wallpaper)
     70                         .setRegion(0, 0, wallpaper.getWidth(), statusBarHeight)
     71                         .clearFilters()
     72                         .generate();
     73                 extractedColors.updateStatusBarPalette(statusBarPalette);
     74             }
     75         }
     76 
     77         // Save the extracted colors and wallpaper id to LauncherProvider.
     78         String colorsString = extractedColors.encodeAsString();
     79         Bundle extras = new Bundle();
     80         extras.putInt(LauncherSettings.Settings.EXTRA_WALLPAPER_ID, wallpaperId);
     81         extras.putString(LauncherSettings.Settings.EXTRA_EXTRACTED_COLORS, colorsString);
     82         getContentResolver().call(
     83                 LauncherSettings.Settings.CONTENT_URI,
     84                 LauncherSettings.Settings.METHOD_SET_EXTRACTED_COLORS_AND_WALLPAPER_ID,
     85                 null, extras);
     86     }
     87 }
     88