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/*
* 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 android.media.update;
import android.content.res.Resources;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
/**
* @hide
*/
public final class ApiLoader {
private static Object sMediaLibrary;
private static final String UPDATE_PACKAGE = "com.android.media.update";
private static final String UPDATE_CLASS = "com.android.media.update.ApiFactory";
private static final String UPDATE_METHOD = "initialize";
private ApiLoader() { }
public static StaticProvider getProvider(Context context) {
try {
return (StaticProvider) getMediaLibraryImpl(context);
} catch (PackageManager.NameNotFoundException | ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
// TODO This method may do I/O; Ensure it does not violate (emit warnings in) strict mode.
private static synchronized Object getMediaLibraryImpl(Context context)
throws PackageManager.NameNotFoundException, ReflectiveOperationException {
if (sMediaLibrary != null) return sMediaLibrary;
// TODO Figure out when to use which package (query media update service)
int flags = Build.IS_DEBUGGABLE ? 0 : PackageManager.MATCH_FACTORY_ONLY;
Context libContext = context.createApplicationContext(
context.getPackageManager().getPackageInfo(UPDATE_PACKAGE, flags).applicationInfo,
Context.CONTEXT_INCLUDE_CODE | Context.CONTEXT_IGNORE_SECURITY);
sMediaLibrary = libContext.getClassLoader()
.loadClass(UPDATE_CLASS)
.getMethod(UPDATE_METHOD, Resources.class, Resources.Theme.class)
.invoke(null, libContext.getResources(), libContext.getTheme());
return sMediaLibrary;
}
}
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