Merge "support framework logging for slices" into pi-dev

    field public static final java.lang.String SLICE_METADATA_KEY = "android.metadata.SLICE_URI";

  }

  public class SliceMetrics {

    ctor public SliceMetrics(android.content.Context, android.net.Uri);

    method public void logHidden();

    method public void logTouch(android.net.Uri);

    method public void logVisible();

  }

  public abstract class SliceProvider extends android.content.ContentProvider {

    ctor public SliceProvider();

    method public final int delete(android.net.Uri, java.lang.String, java.lang.String[]);

/*

 * Copyright (C) 2018 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.app.slice;

import android.annotation.NonNull;

import android.content.Context;

import android.net.Uri;

import com.android.internal.logging.MetricsLogger;

/**

 * Metrics interface for slices.

 *

 * This is called by SliceView, so Slice develoers should

 * not need to reference this class.

 *

 * @see androidx.slice.widget.SliceView

 */

public class SliceMetrics {

    private static final String TAG = "SliceMetrics";

    private MetricsLogger mMetricsLogger;

    /**

     * An object to be used throughout the life of a slice to register events.

     */

    public SliceMetrics(@NonNull Context context, @NonNull Uri uri) {

        mMetricsLogger = new MetricsLogger();

    }

    /**

     * To be called whenever the slice becomes visible to the user.

     */

    public void logVisible() {

    }

    /**

     * To be called whenever the slice becomes invisible to the user.

     */

    public void logHidden() {

    }

    /**

     * To be called whenever the use interacts with a slice.

     *@param subSlice The URI of the sub-slice that is the subject of the interaction.

     */

    public void logTouch(@NonNull Uri subSlice) {

    }

}