| /* |
| * 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.settingslib.deviceinfo; |
| |
| import android.content.Context; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.SystemClock; |
| import android.text.format.DateUtils; |
| |
| import androidx.annotation.VisibleForTesting; |
| import androidx.preference.Preference; |
| import androidx.preference.PreferenceScreen; |
| |
| import com.android.settingslib.core.AbstractPreferenceController; |
| import com.android.settingslib.core.lifecycle.Lifecycle; |
| import com.android.settingslib.core.lifecycle.LifecycleObserver; |
| import com.android.settingslib.core.lifecycle.events.OnStart; |
| import com.android.settingslib.core.lifecycle.events.OnStop; |
| |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * Preference controller for uptime |
| */ |
| public abstract class AbstractUptimePreferenceController extends AbstractPreferenceController |
| implements LifecycleObserver, OnStart, OnStop { |
| |
| @VisibleForTesting |
| static final String KEY_UPTIME = "up_time"; |
| private static final int EVENT_UPDATE_STATS = 500; |
| |
| private Preference mUptime; |
| private Handler mHandler; |
| |
| public AbstractUptimePreferenceController(Context context, Lifecycle lifecycle) { |
| super(context); |
| if (lifecycle != null) { |
| lifecycle.addObserver(this); |
| } |
| } |
| |
| @Override |
| public void onStart() { |
| getHandler().sendEmptyMessage(EVENT_UPDATE_STATS); |
| } |
| |
| @Override |
| public void onStop() { |
| getHandler().removeMessages(EVENT_UPDATE_STATS); |
| } |
| |
| @Override |
| public boolean isAvailable() { |
| return true; |
| } |
| |
| @Override |
| public String getPreferenceKey() { |
| return KEY_UPTIME; |
| } |
| |
| @Override |
| public void displayPreference(PreferenceScreen screen) { |
| super.displayPreference(screen); |
| mUptime = screen.findPreference(KEY_UPTIME); |
| updateTimes(); |
| } |
| |
| private Handler getHandler() { |
| if (mHandler == null) { |
| mHandler = new MyHandler(this); |
| } |
| return mHandler; |
| } |
| |
| private void updateTimes() { |
| mUptime.setSummary(DateUtils.formatDuration(SystemClock.elapsedRealtime())); |
| } |
| |
| private static class MyHandler extends Handler { |
| private WeakReference<AbstractUptimePreferenceController> mStatus; |
| |
| public MyHandler(AbstractUptimePreferenceController activity) { |
| mStatus = new WeakReference<>(activity); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| AbstractUptimePreferenceController status = mStatus.get(); |
| if (status == null) { |
| return; |
| } |
| |
| switch (msg.what) { |
| case EVENT_UPDATE_STATS: |
| status.updateTimes(); |
| sendEmptyMessageDelayed(EVENT_UPDATE_STATS, 1000); |
| break; |
| |
| default: |
| throw new IllegalStateException("Unknown message " + msg.what); |
| } |
| } |
| } |
| } |