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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 com.android.dialer.constants;
import android.content.Context;
import android.support.annotation.NonNull;
import com.android.dialer.common.Assert;
import com.android.dialer.proguard.UsedByReflection;
/**
* Utility to access constants that are different across build variants (Google Dialer, AOSP,
* etc...). This functionality depends on a an implementation being present in the app that has the
* same package and the class name ending in "Impl". For example,
* com.android.dialer.constants.ConstantsImpl. This class is found by the module using reflection.
*/
@UsedByReflection(value = "Constants.java")
public abstract class Constants {
private static Constants instance;
private static boolean didInitializeInstance;
@NonNull
public static synchronized Constants get() {
if (!didInitializeInstance) {
didInitializeInstance = true;
try {
Class<?> clazz = Class.forName(Constants.class.getName() + "Impl");
instance = (Constants) clazz.getConstructor().newInstance();
} catch (ReflectiveOperationException e) {
Assert.fail(
"Unable to create an instance of ConstantsImpl. To fix this error include one of the "
+ "constants modules (googledialer, aosp etc...) in your target.");
}
}
return instance;
}
@NonNull
public abstract String getFilteredNumberProviderAuthority();
@NonNull
public abstract String getFileProviderAuthority();
@NonNull
public abstract String getAnnotatedCallLogProviderAuthority();
@NonNull
public abstract String getPhoneLookupHistoryProviderAuthority();
@NonNull
public abstract String getPreferredSimFallbackProviderAuthority();
public abstract String getUserAgent(Context context);
@NonNull
public abstract String getSettingsActivity();
protected Constants() {}
}