src/com/android/settings/applications/DefaultPhonePreference.java

/*
 * Copyright (C) 2015 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.applications;

import android.content.Context;
import android.os.UserHandle;
import android.os.UserManager;
import android.telecom.DefaultDialerManager;
import android.telecom.TelecomManager;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.AttributeSet;

import com.android.settings.AppListPreference;
import com.android.settings.R;
import com.android.settings.SelfAvailablePreference;
import com.android.settings.Utils;

import java.util.List;
import java.util.Objects;

public class DefaultPhonePreference extends AppListPreference implements SelfAvailablePreference {
    public DefaultPhonePreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        loadDialerApps();
    }

    @Override
    protected CharSequence getConfirmationMessage(String value) {
        return Utils.isPackageDirectBootAware(getContext(), value) ? null
                : getContext().getText(R.string.direct_boot_unaware_dialog_message);
    }

    @Override
    protected boolean persistString(String value) {
        if (!TextUtils.isEmpty(value) && !Objects.equals(value, getDefaultPackage())) {
            DefaultDialerManager.setDefaultDialerApplication(getContext(), value, mUserId);
        }
        setSummary(getEntry());
        return true;
    }

    private void loadDialerApps() {
        List<String> dialerPackages =
                DefaultDialerManager.getInstalledDialerApplications(getContext(), mUserId);

        final String[] dialers = new String[dialerPackages.size()];
        for (int i = 0; i < dialerPackages.size(); i++) {
            dialers[i] = dialerPackages.get(i);
        }
        setPackageNames(dialers, getDefaultPackage(), getSystemPackage());
    }

    private String getDefaultPackage() {
        return DefaultDialerManager.getDefaultDialerApplication(getContext(), mUserId);
    }

    private String getSystemPackage() {
        TelecomManager tm = TelecomManager.from(getContext());
        return tm.getSystemDialerPackage();
    }

    @Override
    public boolean isAvailable(Context context) {
        final TelephonyManager tm =
                (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (!tm.isVoiceCapable()) {
            return false;
        }

        final UserManager um = (UserManager) context.getSystemService(Context.USER_SERVICE);
        final boolean hasUserRestriction =
                um.hasUserRestriction(UserManager.DISALLOW_OUTGOING_CALLS);
        final CharSequence[] entries = getEntries();
        return !hasUserRestriction
                && entries != null
                && entries.length > 0;
    }

    public static boolean hasPhonePreference(String pkg, Context context) {
        List<String> dialerPackages =
                DefaultDialerManager.getInstalledDialerApplications(context, UserHandle.myUserId());
        return dialerPackages.contains(pkg);
    }

    public static boolean isPhoneDefault(String pkg, Context context) {
        String def = DefaultDialerManager.getDefaultDialerApplication(context,
                UserHandle.myUserId());
        return def != null && def.equals(pkg);
    }
}