Add SettingsXmlIndexProvider for search indexing

android_library {

    name: "SettingsLibSearchProvider",

    srcs: ["src/**/*.java"],

    sdk_version: "system_current",

    min_sdk_version: "21",

}

<?xml version="1.0" encoding="utf-8"?>

<!--

  ~ Copyright (C) 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

  -->

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

          package="com.android.settingslib.search">

    <uses-sdk android:minSdkVersion="21" />

</manifest>

/*

 * Copyright (C) 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 com.android.settingslib.searchprovider;

import static android.provider.SearchIndexablesContract.INDEXABLES_XML_RES_COLUMNS;

import android.content.Context;

import android.database.Cursor;

import android.database.MatrixCursor;

import android.provider.SearchIndexableResource;

import android.provider.SearchIndexablesContract.XmlResource;

import android.provider.SearchIndexablesProvider;

import android.text.TextUtils;

import java.util.Collection;

/**

 * An abstract SearchIndexProvider using {@link SearchIndexableIntentResource} for indexing

 */

public abstract class SettingsXmlIndexProvider extends SearchIndexablesProvider {

    private static final String TAG = "XmlIndexProvider";

    @Override

    public boolean onCreate() {

        return true;

    }

    @Override

    public Cursor queryXmlResources(String[] projection) {

        final Context context = getContext();

        final MatrixCursor cursor = new MatrixCursor(INDEXABLES_XML_RES_COLUMNS);

        final Collection<SearchIndexableIntentResource> resources = getIntentResources();

        for (SearchIndexableIntentResource indexableResource : resources) {

            cursor.newRow()

                    .add(XmlResource.COLUMN_RANK, indexableResource.rank)

                    .add(XmlResource.COLUMN_XML_RESID, indexableResource.xmlResId)

                    .add(XmlResource.COLUMN_CLASS_NAME, indexableResource.className)

                    .add(XmlResource.COLUMN_INTENT_ACTION, indexableResource.intentAction)

                    .add(XmlResource.COLUMN_INTENT_TARGET_PACKAGE, context.getPackageName())

                    .add(XmlResource.COLUMN_INTENT_TARGET_CLASS,

                            indexableResource.intentTargetClass);

        }

        return cursor;

    }

    /**

     * Returns all {@link android.provider.SearchIndexablesContract.RawData}.

     *

     * Those are the raw indexable data.

     *

     * @param projection list of {@link android.provider.SearchIndexablesContract.RawData} columns

     *                   to put into the cursor. If {@code null} all supported columns should be

     *                   included.

     */

    public Cursor queryRawData(String[] projection) {

        return null;

    }

    /**

     * Returns all {@link android.provider.SearchIndexablesContract.NonIndexableKey}.

     *

     * Those are the non indexable data keys.

     *

     * @param projection list of {@link android.provider.SearchIndexablesContract.NonIndexableKey}

     *                   columns to put into the cursor. If {@code null} all supported columns

     *                   should be included.

     */

    public Cursor queryNonIndexableKeys(String[] projection) {

        return null;

    }

    /**

     * Returns a Collection of {@link SearchIndexableIntentResource} that should be indexed for

     * search.

     */

    protected abstract Collection<SearchIndexableIntentResource> getIntentResources();

    /**

     * Wrapper class of {@link SearchIndexableResource}. It is for setting the search indexable

     * resource of corresponding XML and intent action with class.

     */

    public static final class SearchIndexableIntentResource extends SearchIndexableResource {

        /**

         * Constructor of {@link SearchIndexableIntentResource}.

         *

         * @param xmlResId preference xml of target {@link prefereceFragment}

         * @param intentAction the intent to open target {@link Activity}

         * @param className the target {@link Activity} class name

         */

        public SearchIndexableIntentResource(int xmlResId, String intentAction,

                String className) {

            super(

                    0 /* rank */,

                    xmlResId,

                    className,

                    0 /* icon resource id */);

            if (TextUtils.isEmpty(intentAction)) {

                this.intentAction = "android.intent.action.MAIN";

            } else {

                this.intentAction = intentAction;

            }

            this.intentTargetClass = className;

        }

    }

}