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/*
* Copyright (C) 2016 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.launcher3.dynamicui;
import android.annotation.TargetApi;
import android.app.WallpaperManager;
import android.app.job.JobParameters;
import android.app.job.JobService;
import android.graphics.Bitmap;
import android.graphics.BitmapRegionDecoder;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.ParcelFileDescriptor;
import android.support.v7.graphics.Palette;
import android.util.Log;
import com.android.launcher3.LauncherProvider;
import com.android.launcher3.LauncherSettings;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.config.FeatureFlags;
import java.io.IOException;
/**
* Extracts colors from the wallpaper, and saves results to {@link LauncherProvider}.
*/
public class ColorExtractionService extends JobService {
private static final String TAG = "ColorExtractionService";
private static final boolean DEBUG = false;
/** The fraction of the wallpaper to extract colors for use on the hotseat. */
private static final float HOTSEAT_FRACTION = 1f / 4;
private HandlerThread mWorkerThread;
private Handler mWorkerHandler;
@Override
public void onCreate() {
super.onCreate();
mWorkerThread = new HandlerThread("ColorExtractionService");
mWorkerThread.start();
mWorkerHandler = new Handler(mWorkerThread.getLooper());
}
@Override
public void onDestroy() {
super.onDestroy();
mWorkerThread.quit();
}
@Override
public boolean onStartJob(final JobParameters jobParameters) {
if (DEBUG) Log.d(TAG, "onStartJob");
mWorkerHandler.post(new Runnable() {
@Override
public void run() {
WallpaperManager wallpaperManager = WallpaperManager.getInstance(
ColorExtractionService.this);
int wallpaperId = ExtractionUtils.getWallpaperId(wallpaperManager);
ExtractedColors extractedColors = new ExtractedColors();
if (wallpaperManager.getWallpaperInfo() != null) {
// We can't extract colors from live wallpapers; always use the default color.
extractedColors.updateHotseatPalette(null);
} else {
// We extract colors for the hotseat and status bar separately,
// since they only consider part of the wallpaper.
extractedColors.updateHotseatPalette(getHotseatPalette());
if (FeatureFlags.LIGHT_STATUS_BAR) {
extractedColors.updateStatusBarPalette(getStatusBarPalette());
}
}
// Save the extracted colors and wallpaper id to LauncherProvider.
String colorsString = extractedColors.encodeAsString();
Bundle extras = new Bundle();
extras.putInt(LauncherSettings.Settings.EXTRA_WALLPAPER_ID, wallpaperId);
extras.putString(LauncherSettings.Settings.EXTRA_EXTRACTED_COLORS, colorsString);
getContentResolver().call(
LauncherSettings.Settings.CONTENT_URI,
LauncherSettings.Settings.METHOD_SET_EXTRACTED_COLORS_AND_WALLPAPER_ID,
null, extras);
jobFinished(jobParameters, false /* needsReschedule */);
if (DEBUG) Log.d(TAG, "job finished!");
}
});
return true;
}
@Override
public boolean onStopJob(JobParameters jobParameters) {
if (DEBUG) Log.d(TAG, "onStopJob");
mWorkerHandler.removeCallbacksAndMessages(null);
return true;
}
@TargetApi(Build.VERSION_CODES.N)
private Palette getHotseatPalette() {
WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
if (Utilities.ATLEAST_NOUGAT) {
try (ParcelFileDescriptor fd = wallpaperManager
.getWallpaperFile(WallpaperManager.FLAG_SYSTEM)) {
BitmapRegionDecoder decoder = BitmapRegionDecoder
.newInstance(fd.getFileDescriptor(), false);
int height = decoder.getHeight();
Rect decodeRegion = new Rect(0, (int) (height * (1f - HOTSEAT_FRACTION)),
decoder.getWidth(), height);
Bitmap bitmap = decoder.decodeRegion(decodeRegion, null);
decoder.recycle();
if (bitmap != null) {
return Palette.from(bitmap).clearFilters().generate();
}
} catch (IOException | NullPointerException e) {
Log.e(TAG, "Fetching partial bitmap failed, trying old method", e);
}
}
Bitmap wallpaper = ((BitmapDrawable) wallpaperManager.getDrawable()).getBitmap();
return Palette.from(wallpaper)
.setRegion(0, (int) (wallpaper.getHeight() * (1f - HOTSEAT_FRACTION)),
wallpaper.getWidth(), wallpaper.getHeight())
.clearFilters()
.generate();
}
@TargetApi(Build.VERSION_CODES.N)
private Palette getStatusBarPalette() {
WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
int statusBarHeight = getResources()
.getDimensionPixelSize(R.dimen.status_bar_height);
if (Utilities.ATLEAST_NOUGAT) {
try (ParcelFileDescriptor fd = wallpaperManager
.getWallpaperFile(WallpaperManager.FLAG_SYSTEM)) {
BitmapRegionDecoder decoder = BitmapRegionDecoder
.newInstance(fd.getFileDescriptor(), false);
Rect decodeRegion = new Rect(0, 0,
decoder.getWidth(), statusBarHeight);
Bitmap bitmap = decoder.decodeRegion(decodeRegion, null);
decoder.recycle();
if (bitmap != null) {
return Palette.from(bitmap).clearFilters().generate();
}
} catch (IOException | NullPointerException e) {
Log.e(TAG, "Fetching partial bitmap failed, trying old method", e);
}
}
Bitmap wallpaper = ((BitmapDrawable) wallpaperManager.getDrawable()).getBitmap();
return Palette.from(wallpaper)
.setRegion(0, 0, wallpaper.getWidth(), statusBarHeight)
.clearFilters()
.generate();
}
}
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