| /* |
| * Copyright (C) 2020 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.network; |
| |
| import android.content.Context; |
| import android.net.ConnectivityManager; |
| |
| import androidx.lifecycle.Lifecycle; |
| import androidx.lifecycle.LifecycleObserver; |
| import androidx.lifecycle.OnLifecycleEvent; |
| import androidx.preference.Preference; |
| import androidx.preference.PreferenceScreen; |
| |
| import com.android.settings.core.TogglePreferenceController; |
| import com.android.settings.datausage.DataSaverBackend; |
| |
| public abstract class TetherBasePreferenceController extends TogglePreferenceController |
| implements LifecycleObserver, DataSaverBackend.Listener, |
| TetherEnabler.OnTetherStateUpdateListener { |
| |
| private static final String TAG = "TetherBasePreferenceController"; |
| final ConnectivityManager mCm; |
| private final DataSaverBackend mDataSaverBackend; |
| |
| private TetherEnabler mTetherEnabler; |
| Preference mPreference; |
| private boolean mDataSaverEnabled; |
| int mTetheringState; |
| |
| TetherBasePreferenceController(Context context, String preferenceKey) { |
| super(context, preferenceKey); |
| mCm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); |
| mDataSaverBackend = new DataSaverBackend(context); |
| mDataSaverEnabled = mDataSaverBackend.isDataSaverEnabled(); |
| } |
| |
| /** |
| * Set TetherEnabler for the controller. Call this method to initialize the controller. |
| * @param tetherEnabler The tetherEnabler to set for the controller. |
| */ |
| public void setTetherEnabler(TetherEnabler tetherEnabler) { |
| mTetherEnabler = tetherEnabler; |
| } |
| |
| @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) |
| public void onResume() { |
| // Must call setEnabler() before |
| if (mTetherEnabler != null) { |
| mTetherEnabler.addListener(this); |
| } |
| mDataSaverBackend.addListener(this); |
| } |
| |
| @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) |
| public void onPause() { |
| if (mTetherEnabler != null) { |
| mTetherEnabler.removeListener(this); |
| } |
| mDataSaverBackend.remListener(this); |
| } |
| |
| @Override |
| public boolean isChecked() { |
| return TetherEnabler.isTethering(mTetheringState, getTetherType()); |
| } |
| |
| @Override |
| public boolean setChecked(boolean isChecked) { |
| if (mTetherEnabler == null) { |
| return false; |
| } |
| if (isChecked) { |
| mTetherEnabler.startTethering(getTetherType()); |
| } else { |
| mTetherEnabler.stopTethering(getTetherType()); |
| } |
| return true; |
| } |
| |
| @Override |
| public void displayPreference(PreferenceScreen screen) { |
| super.displayPreference(screen); |
| mPreference = screen.findPreference(mPreferenceKey); |
| } |
| |
| @Override |
| public void updateState(Preference preference) { |
| super.updateState(preference); |
| if (isAvailable()) { |
| preference.setEnabled(getAvailabilityStatus() != DISABLED_DEPENDENT_SETTING); |
| } |
| } |
| |
| @Override |
| public int getAvailabilityStatus() { |
| if (!shouldShow()) { |
| return CONDITIONALLY_UNAVAILABLE; |
| } |
| |
| if (mDataSaverEnabled || !shouldEnable()) { |
| return DISABLED_DEPENDENT_SETTING; |
| } |
| return AVAILABLE; |
| } |
| |
| @Override |
| public void onTetherStateUpdated(@TetherEnabler.TetheringState int state) { |
| mTetheringState = state; |
| updateState(mPreference); |
| } |
| |
| @Override |
| public void onDataSaverChanged(boolean isDataSaving) { |
| mDataSaverEnabled = isDataSaving; |
| } |
| |
| @Override |
| public void onWhitelistStatusChanged(int uid, boolean isWhitelisted) { |
| } |
| |
| @Override |
| public void onBlacklistStatusChanged(int uid, boolean isBlacklisted) { |
| } |
| |
| /** |
| * Used to enable or disable the preference. |
| * @return true if the preference should be enabled; false otherwise. |
| */ |
| public abstract boolean shouldEnable(); |
| |
| /** |
| * Used to determine visibility of the preference. |
| * @return true if the preference should be visible; false otherwise. |
| */ |
| public abstract boolean shouldShow(); |
| |
| /** |
| * Get the type of tether interface that is controlled by the preference. |
| * @return the tether interface, like {@link ConnectivityManager#TETHERING_WIFI} |
| */ |
| public abstract int getTetherType(); |
| } |