src/com/android/settings/development/LocalBackupPasswordPreferenceController.java

/*
 * 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.settings.development;

import android.app.backup.IBackupManager;
import android.content.Context;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.UserManager;

import androidx.annotation.VisibleForTesting;
import androidx.preference.Preference;

import com.android.settings.R;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settingslib.development.DeveloperOptionsPreferenceController;

public class LocalBackupPasswordPreferenceController extends DeveloperOptionsPreferenceController
        implements PreferenceControllerMixin {

    private static final String LOCAL_BACKUP_PASSWORD = "local_backup_password";

    private final UserManager mUserManager;
    private final IBackupManager mBackupManager;

    public LocalBackupPasswordPreferenceController(Context context) {
        super(context);

        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
        mBackupManager = IBackupManager.Stub.asInterface(
                ServiceManager.getService(Context.BACKUP_SERVICE));
    }

    @Override
    public String getPreferenceKey() {
        return LOCAL_BACKUP_PASSWORD;
    }

    @Override
    public void updateState(Preference preference) {
        updatePasswordSummary(preference);
    }

    private void updatePasswordSummary(Preference preference) {
        preference.setEnabled(isAdminUser() && mBackupManager != null);
        if (mBackupManager == null) {
            return;
        }
        try {
            if (mBackupManager.hasBackupPassword()) {
                preference.setSummary(R.string.local_backup_password_summary_change);
            } else {
                preference.setSummary(R.string.local_backup_password_summary_none);
            }
        } catch (RemoteException e) {
            // Not much we can do here
        }
    }

    @VisibleForTesting
    boolean isAdminUser() {
        return mUserManager.isAdminUser();
    }
}