DefaultAndroidSeekableAnimatedImageResourceByResIdResolver.java
/*
* Copyright 2023 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 androidx.wear.protolayout.renderer.inflater;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Xml;
import androidx.annotation.NonNull;
import androidx.wear.protolayout.renderer.common.SeekableAnimatedVectorDrawable;
import androidx.wear.protolayout.proto.ResourceProto.AndroidSeekableAnimatedImageResourceByResId;
import androidx.wear.protolayout.proto.ResourceProto.AnimatedImageFormat;
import androidx.wear.protolayout.renderer.inflater.ResourceResolvers.AndroidSeekableAnimatedImageResourceByResIdResolver;
import androidx.wear.protolayout.renderer.inflater.ResourceResolvers.ResourceAccessException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
/** Resource resolver for seekable Android animated resources. */
public class DefaultAndroidSeekableAnimatedImageResourceByResIdResolver
implements AndroidSeekableAnimatedImageResourceByResIdResolver {
@NonNull private final Resources mAndroidResources;
/**
* Constructor.
*
* @param androidResources An Android Resources instance for the tile service's package. This is
* normally obtained from {@code PackageManager#getResourcesForApplication}.
*/
public DefaultAndroidSeekableAnimatedImageResourceByResIdResolver(
@NonNull Resources androidResources) {
this.mAndroidResources = androidResources;
}
@NonNull
@Override
public Drawable getDrawableOrThrow(
@NonNull AndroidSeekableAnimatedImageResourceByResId resource)
throws ResourceAccessException {
if (resource.getAnimatedImageFormat() == AnimatedImageFormat.ANIMATED_IMAGE_FORMAT_AVD) {
try {
final XmlPullParser parser = mAndroidResources.getXml(resource.getResourceId());
final AttributeSet attrs = Xml.asAttributeSet(parser);
int type;
do {
type = parser.next();
} while (type != XmlPullParser.START_TAG && type != XmlPullParser.END_DOCUMENT);
if (type != XmlPullParser.START_TAG) {
throw new XmlPullParserException("No start tag found");
}
return SeekableAnimatedVectorDrawable.createFromXmlInner(
mAndroidResources, parser, attrs, null);
} catch (XmlPullParserException | IOException e) {
Log.e("SeekableAVD", "Error building pipeline", e);
}
}
throw new ResourceAccessException("Unsupported animated image format");
}
}