ContentProviderCompat.java
/*
* Copyright 2019 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.core.content;
import android.content.ContentProvider;
import android.content.Context;
import androidx.annotation.NonNull;
/**
* Helper for accessing features in {@link android.content.ContentProvider} in a backwards
* compatible fashion.
*/
public final class ContentProviderCompat {
private ContentProviderCompat() {
/* Hide constructor */
}
/**
* Returns NonNull context associated with given {@link android.content.ContentProvider}.
*
* A provider must be declared in the manifest and created automatically by the system, and
* context is only available after {@link android.content.ContentProvider#onCreate}
* is called.
*
* @param provider The {@link android.content.ContentProvider}.
* @return The {@link android.content.Context} object associated with the
* {@link android.content.ContentProvider}.
*/
public static @NonNull Context requireContext(@NonNull final ContentProvider provider) {
final Context ctx = provider.getContext();
if (ctx == null) {
throw new IllegalStateException("Cannot find context from the provider.");
}
return ctx;
}
}