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Commit 6bc44a07 authored by Garvit Narang's avatar Garvit Narang
Browse files

Add a wear backup helper 

This adds a backup helper for Wear to use in system server along with an
internal interface to communicate the info.

Bug: 380505272
Test: manually confirm backup succesfull
Flag: EXEMPT trivial
Change-Id: Iaf2e8c24dd232911c1294e46b57f95e00b8e32f9
parent e579b0d6

services/core/java/com/android/server/backup/SystemBackupAgent.java

+7 −1
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ public class SystemBackupAgent extends BackupAgentHelper { 
    private static final String SYSTEM_GENDER_HELPER = "system_gender";

    private static final String DISPLAY_HELPER = "display";

    private static final String INPUT_HELPER = "input";

    private static final String WEAR_BACKUP_HELPER = "wear";



    // These paths must match what the WallpaperManagerService uses.  The leaf *_FILENAME

    // are also used in the full-backup file format, so must not change unless steps are
@@ -113,7 +114,7 @@ public class SystemBackupAgent extends BackupAgentHelper { 
    private static final Set<String> sEligibleHelpersForNonSystemUser =

            SetUtils.union(sEligibleHelpersForProfileUser,

                    Sets.newArraySet(ACCOUNT_MANAGER_HELPER, USAGE_STATS_HELPER, PREFERRED_HELPER,

                            SHORTCUT_MANAGER_HELPER, INPUT_HELPER));

                            SHORTCUT_MANAGER_HELPER, INPUT_HELPER, WEAR_BACKUP_HELPER));



    private int mUserId = UserHandle.USER_SYSTEM;

    private boolean mIsProfileUser = false;
@@ -153,6 +154,11 @@ public class SystemBackupAgent extends BackupAgentHelper { 
        if (com.android.hardware.input.Flags.enableBackupAndRestoreForInputGestures()) {

            addHelperIfEligibleForUser(INPUT_HELPER, new InputBackupHelper(mUserId));

        }



        // Add Wear helper only if the device is a watch

        if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) {

            addHelperIfEligibleForUser(WEAR_BACKUP_HELPER, new WearBackupHelper());

        }

    }



    @Override

services/core/java/com/android/server/backup/WearBackupHelper.java

0 → 100644
+49 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2024 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

 *

 *      https://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.server.backup;



import android.annotation.Nullable;

import android.app.backup.BlobBackupHelper;



import com.android.server.LocalServices;



/** A {@link android.app.backup.BlobBackupHelper} for Wear */

public class WearBackupHelper extends BlobBackupHelper {



    private static final int BLOB_VERSION = 1;

    private static final String KEY_WEAR_BACKUP = "wear";

    @Nullable private final WearBackupInternal mWearBackupInternal;



    public WearBackupHelper() {

        super(BLOB_VERSION, KEY_WEAR_BACKUP);

        mWearBackupInternal = LocalServices.getService(WearBackupInternal.class);

    }



    @Override

    protected byte[] getBackupPayload(String key) {

        return KEY_WEAR_BACKUP.equals(key) && mWearBackupInternal != null

                ? mWearBackupInternal.getBackupPayload(getLogger())

                : null;

    }



    @Override

    protected void applyRestoredPayload(String key, byte[] payload) {

        if (KEY_WEAR_BACKUP.equals(key) && mWearBackupInternal != null) {

            mWearBackupInternal.applyRestoredPayload(payload);

        }

    }

}

services/core/java/com/android/server/backup/WearBackupInternal.java

0 → 100644
+32 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2024 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

 *

 *      https://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.server.backup;



import android.app.backup.BackupRestoreEventLogger;



import com.android.internal.annotations.Keep;



/** A local service internal for Wear OS handle backup/restore */

@Keep

public interface WearBackupInternal {



    /** Gets the backup payload */

    byte[] getBackupPayload(BackupRestoreEventLogger logger);



    /** Applies the restored payload */

    void applyRestoredPayload(byte[] payload);

}