Android P添加屏保功能，如果休眠时间设定大于屏保时间，则先进入屏保，达到休眠时间后再进入休眠
需求：
- 添加屏幕互保开关，默认关闭。
- 只保留时钟，可设定指针和数字、夜间模式。
- 启用时间改多长时间无操作进入屏保，可设定1、5、10、15、30分钟。
- 如果休眠时间设定小于屏保时间，则优先进入休眠，如果休眠时间设定大于屏保时间，则先进入屏保，达到休眠时间后再进入休眠
修改后的屏保：
分析与实现：
1.修改进入屏保的条件
由于Android原生系统默认进入屏保的条件是充电或插入基座时，但到达休眠时才进入屏保。所以需要把进入屏保的条件修改为任何时候都能进入。
frameworks\base\core\res\res\values\config.xml
把"config_dreamsEnabledOnBattery"修改为true即实现任何时候都能进入屏保
<!-- Are we allowed to dream while not plugged in? -->
<bool name="config_dreamsEnabledOnBattery">true</bool>2.在设置–>显示–>屏保中添加“屏幕互保”选项开关
2.1添加系统自定义全局变量，用来保存“屏幕互保”选项开关的状态值
frameworks/base/core/java/android/provider/Settings.java
+ /** @hide */
+ public static final String SCREENSAVER_SWITCH= "seewo.screensavers.switch";
public static final class Secure extends NameValueTable {
/** @hide */
public static final String SCREENSAVER_TIMEOUT= “seewo.screensavers.timeout”;2.2 vendor/mediatek/proprietary/packages/apps/MtkSettings/res/values-zh-rCN/strings.xml
<string name="screensaver_switch_title">屏幕互保</string>
2.3 vendor/mediatek/proprietary/packages/apps/MtkSettings/res/xml/dream_fragment_overview.xml
<PreferenceScreen
xmlns:android="http://schemas.android.com/apk/res/android"
+ xmlns:settings="http://schemas.android.com/apk/res-auto"
android:key="dream_overview_screen"
<SwitchPreference
android:key="screensaver_switch"
android:title="@string/screensaver_switch_title"/>
2.4添加vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/dream/ScreenSaverSwitchPreferenceController.java文件
/*
* 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.dream;
import static android.provider.Settings.Secure.SCREENSAVER_SWITCH;
import android.content.Context;
import android.provider.Settings;
import android.support.v14.preference.SwitchPreference;
import android.support.v7.preference.Preference;
import com.android.settings.R;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settingslib.core.AbstractPreferenceController;
public class ScreenSaverSwitchPreferenceController extends AbstractPreferenceController
implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener {
private static final String KEY_SCREENSAVER_SWITCH_NAME = "screensaver_switch";
public ScreenSaverSwitchPreferenceController(Context context) {
super(context);
}
@Override
public boolean isAvailable() {
return true;
}
@Override
public String getPreferenceKey() {
return KEY_SCREENSAVER_SWITCH_NAME;
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
boolean value = (Boolean) newValue;
Settings.Secure.putInt(mContext.getContentResolver(),
KEY_SCREENSAVER_SWITCH_NAME, value ? 1 : 0);
if (value) {
Settings.Secure.putInt(mContext.getContentResolver(), Settings.Secure.SCREENSAVER_SWITCH,
1);
} else {
Settings.Secure.putInt(mContext.getContentResolver(), Settings.Secure.SCREENSAVER_SWITCH,
0);
}
return true;
}
@Override
public void updateState(Preference preference) {
int value = Settings.Secure.getInt(mContext.getContentResolver(),
KEY_SCREENSAVER_SWITCH_NAME, 0);
((SwitchPreference) preference).setChecked(value == 1);
}
}
2.5 vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/dream/DreamSettings.java
@@ -132,6 +132,7 @@ public class DreamSettings extends DashboardFragment {
controllers.add(new StartNowPreferenceController(context));
+ controllers.add(new ScreenSaverSwitchPreferenceController(context));
return controllers;
3.隐藏“启动时间”
--- a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/dream/StartNowPreferenceController.java
+++ b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/dream/StartNowPreferenceController.java
@@ -40,7 +40,7 @@ public class StartNowPreferenceController extends AbstractPreferenceController i
@Override
public boolean isAvailable() {
- return true;
+ return false;
}
4.添加选择无操作多少分钟后进入屏保的ListPreference
4.1添加系统自定义全局变量，用来保存无操作多少分钟后进入屏保的时间。
frameworks/base/core/java/android/provider/Settings.java
public static final class Secure extends NameValueTable {
/** @hide */
public static final String SCREENSAVER_TIMEOUT= "seewo.screensavers.timeout";
4.2设置–>显示–>屏保中添加ListPreference
vendor/mediatek/proprietary/packages/apps/MtkSettings/res/xml/dream_fragment_overview.xml
+ <ListPreference
+ android:key="screensaver_timeout"
+ android:title="@string/screensaver_timeout"
+ android:entries="@array/screensaver_timeout_entries"
+ android:entryValues="@array/screensaver_timeout_values"
+ settings:controller="com.android.settings.dream.ScreenSaverTimeoutPreferenceController" />
vendor/mediatek/proprietary/packages/apps/MtkSettings/res/values/arrays.xml
+ <!-- Titles for screensaver preference. -->
+ <string-array name="screensaver_timeout_entries" >
+ <item>@string/screensaver_timeout_1min</item>
+ <item>@string/screensaver_timeout_5mins</item>
+ <item>@string/screensaver_timeout_10mins</item>
+ <item>@string/screensaver_timeout_15mins</item>
+ <item>@string/screensaver_timeout_30mins</item>
+ </string-array>
+
+ <!-- Values for screensaver preference. -->
+ <string-array name="screensaver_timeout_values" translatable="false" >
+ <item>60000</item>
+ <item>300000</item>
+ <item>600000</item>
+ <item>900000</item>
+ <item>1800000</item>
+ </string-array>
vendor/mediatek/proprietary/packages/apps/MtkSettings/res/values-zh-rCN/strings.xml
+ <string name="screensaver_timeout">屏保</string>
+ <string name="screensaver_timeout_1min">1 分钟</string>
+ <string name="screensaver_timeout_5mins">5 分钟</string>
+ <string name="screensaver_timeout_10mins">10 分钟</string>
+ <string name="screensaver_timeout_15mins">15 分钟</string>
+ <string name="screensaver_timeout_30mins">30 分钟</string>
+ <string name="screensaver_timeout_summary">"无操作<xliff:g id="TIMEOUT_DESCRIPTION">%1$s</xliff:g>后"</string>
+ <string name="screensaver_switch_title">屏幕互保</string>
4.3添加vendor\mediatek\proprietary\packages\apps\MtkSettings\src\com\android\settings\dream\ScreenSaverTimeoutPreferenceController.java
/*
* Copyright (C) 2018 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.dream;
import static android.provider.Settings.Secure.SCREENSAVER_TIMEOUT;
import android.content.Context;
import android.provider.Settings;
import android.support.v7.preference.ListPreference;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceScreen;
import android.util.FeatureFlagUtils;
import com.android.settings.R;
import com.android.settings.core.BasePreferenceController;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settingslib.core.AbstractPreferenceController;
/**
* Setting where user can pick if SystemUI will be light, dark or try to match
* the wallpaper colors.
*/
public class ScreenSaverTimeoutPreferenceController extends BasePreferenceController
implements Preference.OnPreferenceChangeListener {
private ListPreference mScreenSaverTimeoutPref;
public ScreenSaverTimeoutPreferenceController(Context context, String preferenceKey) {
super(context, preferenceKey);
}
@Override
public int getAvailabilityStatus() {
return AVAILABLE;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mScreenSaverTimeoutPref = (ListPreference) screen.findPreference(getPreferenceKey());
int value = Settings.Secure.getInt(mContext.getContentResolver(), SCREENSAVER_TIMEOUT, 60000);
mScreenSaverTimeoutPref.setValue(Integer.toString(value));
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
int value = Integer.parseInt((String) newValue);
Settings.Secure.putInt(mContext.getContentResolver(), SCREENSAVER_TIMEOUT, value);
refreshSummary(preference);
return true;
}
@Override
public CharSequence getSummary() {
int value = Settings.Secure.getInt(mContext.getContentResolver(), SCREENSAVER_TIMEOUT, 60000);
int index = mScreenSaverTimeoutPref.findIndexOfValue(Integer.toString(value));
return mContext.getString(R.string.screensaver_timeout_summary, mScreenSaverTimeoutPref.getEntries()[index]);
}
}
5.屏保默认为原生时钟，移除“万花筒”
5.1 原生屏保默认是使用Google GMS中的时钟，因此修改为默认使用原生的时钟。
frameworks/base/core/res/res/values/config.xml
- <string name="config_dreamsDefaultComponent" translatable="false">com.google.android.deskclock/com.android.deskclock.Screensaver</string>
+ <string name="config_dreamsDefaultComponent" translatable="false">com.android.deskclock/com.android.deskclock.Screensaver</string>
5.2移除“万花筒”
vendor/mediatek/proprietary/packages/apps/SettingsLib/src/com/android/settingslib/dream/DreamBackend.java
public List<DreamInfo> getDreamInfos() {
logd("getDreamInfos()");
+ String componentName;//del basic.Colors
ComponentName activeDream = getActiveDream();
PackageManager pm = mContext.getPackageManager();
Intent dreamIntent = new Intent(DreamService.SERVICE_INTERFACE);
@@ -124,6 +125,12 @@ public class DreamBackend {
dreamInfo.caption = resolveInfo.loadLabel(pm);
dreamInfo.icon = resolveInfo.loadIcon(pm);
dreamInfo.componentName = getDreamComponentName(resolveInfo);
+ componentName = dreamInfo.componentName.toString();
+ if(componentName.contains("com.android.dreams.basic.Colors")){
+ continue;
+ }
dreamInfo.isActive = dreamInfo.componentName.equals(activeDream);
6.定制屏保时间
如果休眠时间设定小于屏保时间，则优先进入休眠，如果休眠时间设定大于屏保时间，则先进入屏保，达到休眠时间后再进入休眠的实现
frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java
6.1修改进入屏保的条件由Setting中的“屏幕互保”选项的开或关来决定
private boolean updateWakefulnessLocked(int dirty) {
boolean changed = false;
if ((dirty & (DIRTY_WAKE_LOCKS | DIRTY_USER_ACTIVITY | DIRTY_BOOT_COMPLETED
| DIRTY_WAKEFULNESS | DIRTY_STAY_ON | DIRTY_PROXIMITY_POSITIVE
| DIRTY_DOCK_STATE)) != 0) {
if (mWakefulness == WAKEFULNESS_AWAKE && isItBedTimeYetLocked()) {
if (DEBUG_SPEW) {
Slog.d(TAG, "updateWakefulnessLocked: Bed time...");
}
final long time = SystemClock.uptimeMillis();
if (shouldNapAtBedTimeLocked()) {//此处为进入屏保的条件
changed = napNoUpdateLocked(time, Process.SYSTEM_UID);
} else {
changed = goToSleepNoUpdateLocked(time,
PowerManager.GO_TO_SLEEP_REASON_TIMEOUT, 0, Process.SYSTEM_UID);
}
}
}
return changed;
}
shouldNapAtBedTimeLocked()为进入屏保的条件，所以需要修改shouldNapAtBedTimeLocked()的返回值。
private boolean shouldNapAtBedTimeLocked() {
- return mDreamsActivateOnSleepSetting
- || (mDreamsActivateOnDockSetting
- && mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED);
+ return Settings.Secure.getInt(mContext.getContentResolver(),Settings.Secure.SCREENSAVER_SWITCH,0) == 1;
+ //return mDreamsActivateOnSleepSetting
+ // || (mDreamsActivateOnDockSetting
+ // && mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED);
}
Settings.Secure.getInt(mContext.getContentResolver(),Settings.Secure.SCREENSAVER_SWITCH,0)是获取“屏幕互保”的状态值，1表示打开，0表示关闭。
6.2修改取决于什么时候进入屏保的逻辑。
private void updateUserActivitySummaryLocked(long now, int dirty) {
// Update the status of the user activity timeout timer.
if ((dirty & (DIRTY_WAKE_LOCKS | DIRTY_USER_ACTIVITY
| DIRTY_WAKEFULNESS | DIRTY_SETTINGS)) != 0) {
mHandler.removeMessages(MSG_USER_ACTIVITY_TIMEOUT);
long nextTimeout = 0;
long screenSaverNextTimeout = 0;//添加计算下次进入屏保的时间
boolean isScreenSaverEnabled = Settings.Secure.getInt(mContext.getContentResolver(),Settings.Secure.SCREENSAVER_SWITCH,0) == 1;//获取“屏幕互保”是否打开
if (mWakefulness == WAKEFULNESS_AWAKE
|| mWakefulness == WAKEFULNESS_DREAMING
|| mWakefulness == WAKEFULNESS_DOZING) {
final long sleepTimeout = getSleepTimeoutLocked();
final long screenOffTimeout = getScreenOffTimeoutLocked(sleepTimeout);//无操作多少分钟后进入休眠的时间
final long screenDimDuration = getScreenDimDurationLocked(screenOffTimeout);
final boolean userInactiveOverride = mUserInactiveOverrideFromWindowManager;
final long nextProfileTimeout = getNextProfileTimeoutLocked(now);
final long screenSaverTimeout = Settings.Secure.getInt(mContext.getContentResolver(),Settings.Secure.SCREENSAVER_TIMEOUT,60000);//无操作多少分钟后进入屏保的时间
mUserActivitySummary = 0;
if (mLastUserActivityTime >= mLastWakeTime) {
nextTimeout = mLastUserActivityTime
+ screenOffTimeout - screenDimDuration;
screenSaverNextTimeout = mLastUserActivityTime + screenSaverTimeout;//无操作后下次进入屏保的时间
if (now < nextTimeout) {
//当“屏幕互保”是打开的，并且无操作后进入休眠的时间 大于 无操作后进入屏保的时间，
//而且当前的时间 大于 无操作后下次进入屏保的时间则进入屏保
if(isScreenSaverEnabled && screenOffTimeout > screenSaverTimeout && now > screenSaverNextTimeout ){
mUserActivitySummary = USER_ACTIVITY_SCREEN_DREAM;
}else{//否则保持屏保亮屏
mUserActivitySummary = USER_ACTIVITY_SCREEN_BRIGHT;
}
//Neostra dangziming end screensaver
} else {
nextTimeout = mLastUserActivityTime + screenOffTimeout;
if (now < nextTimeout) {
mUserActivitySummary = USER_ACTIVITY_SCREEN_DIM;
}
}
}
if (mUserActivitySummary == 0
&& mLastUserActivityTimeNoChangeLights >= mLastWakeTime) {
nextTimeout = mLastUserActivityTimeNoChangeLights + screenOffTimeout;
if (now < nextTimeout) {
if (mDisplayPowerRequest.policy == DisplayPowerRequest.POLICY_BRIGHT
|| mDisplayPowerRequest.policy == DisplayPowerRequest.POLICY_VR) {
mUserActivitySummary = USER_ACTIVITY_SCREEN_BRIGHT;
} else if (mDisplayPowerRequest.policy == DisplayPowerRequest.POLICY_DIM) {
mUserActivitySummary = USER_ACTIVITY_SCREEN_DIM;
}
}
}
if (mUserActivitySummary == 0) {
if (sleepTimeout >= 0) {
final long anyUserActivity = Math.max(mLastUserActivityTime,
mLastUserActivityTimeNoChangeLights);
if (anyUserActivity >= mLastWakeTime) {
nextTimeout = anyUserActivity + sleepTimeout;
if (now < nextTimeout) {
mUserActivitySummary = USER_ACTIVITY_SCREEN_DREAM;
}
}
} else {
//mUserActivitySummary = USER_ACTIVITY_SCREEN_DREAM;//删除系统进入休眠后才进入屏保的逻辑
nextTimeout = -1;
}
}
if (mUserActivitySummary != USER_ACTIVITY_SCREEN_DREAM && userInactiveOverride) {
if ((mUserActivitySummary &
(USER_ACTIVITY_SCREEN_BRIGHT | USER_ACTIVITY_SCREEN_DIM)) != 0) {
// Device is being kept awake by recent user activity
if (nextTimeout >= now && mOverriddenTimeout == -1) {
// Save when the next timeout would have occurred
mOverriddenTimeout = nextTimeout;
}
}
mUserActivitySummary = USER_ACTIVITY_SCREEN_DREAM;
nextTimeout = -1;
}
if (nextProfileTimeout > 0) {
nextTimeout = Math.min(nextTimeout, nextProfileTimeout);
}
if (mUserActivitySummary != 0 && nextTimeout >= 0) {
//当“屏幕互保”是打开的，并且无操作后进入休眠的时间 大于 无操作后进入屏保的时间，
//而且当前的时间 大于 无操作后下次进入屏保的时间则发送信息进入屏保
if(isScreenSaverEnabled && screenOffTimeout > screenSaverTimeout && now <= screenSaverNextTimeout ){
scheduleUserInactivityTimeout(screenSaverNextTimeout);
}else{//否则发送进入休眠的信息
scheduleUserInactivityTimeout(nextTimeout);
}
//Neostra dangziming end screensaver
}
} else {
mUserActivitySummary = 0;
}
if (DEBUG_SPEW) {
Slog.d(TAG, "updateUserActivitySummaryLocked: mWakefulness="
+ PowerManagerInternal.wakefulnessToString(mWakefulness)
+ ", mUserActivitySummary=0x" + Integer.toHexString(mUserActivitySummary)
+ ", nextTimeout=" + TimeUtils.formatUptime(nextTimeout));
}
}
}
updateUserActivitySummaryLocked()的逻辑分析可以参考Android 8.1 PowerManagerService分析(二) ——updatePowerStateLocked()方法
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