Android 8.1 修改锁屏显示时间

平台

RK3399 + Android 8.1

需求

加长锁屏显示时间, 延长用户解锁时间

补丁

|-- frameworks/base/core/res/res/values/config.xml

diff --git a/frameworks/base/core/res/res/values/config.xml b/frameworks/base/core/res/res/values/config.xml
index b81b609..c401275 100644
--- a/frameworks/base/core/res/res/values/config.xml
+++ b/frameworks/base/core/res/res/values/config.xml
@@ -1988,7 +1988,7 @@This value must be greater than zero, otherwise the device will immediatelyfall asleep again as soon as it is awoken.-->
-    <integer name="config_minimumScreenOffTimeout">10000</integer>
+    <integer name="config_minimumScreenOffTimeout">15000</integer><!-- User activity timeout: Maximum screen dim duration in milliseconds.

由原来的10 秒延长到15秒

跟踪

|-- frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java

    private void readConfigurationLocked() {...mMinimumScreenOffTimeoutConfig = resources.getInteger(com.android.internal.R.integer.config_minimumScreenOffTimeout);...}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;if (mWakefulness == WAKEFULNESS_AWAKE|| mWakefulness == WAKEFULNESS_DREAMING|| mWakefulness == WAKEFULNESS_DOZING) {final int sleepTimeout = getSleepTimeoutLocked();final int screenOffTimeout = getScreenOffTimeoutLocked(sleepTimeout);...mUserActivitySummary = 0;if (mLastUserActivityTime >= mLastWakeTime) {//计算超时进入休眠时间.
//mLastUserActivityTime最后一次操作nextTimeout = mLastUserActivityTime+ screenOffTimeout - screenDimDuration;if (now < nextTimeout) {mUserActivitySummary = USER_ACTIVITY_SCREEN_BRIGHT;} else {nextTimeout = mLastUserActivityTime + screenOffTimeout;if (now < nextTimeout) {mUserActivitySummary = USER_ACTIVITY_SCREEN_DIM;}}}...if (mUserActivitySummary != 0 && nextTimeout >= 0) {Message msg = mHandler.obtainMessage(MSG_USER_ACTIVITY_TIMEOUT);msg.setAsynchronous(true);mHandler.sendMessageAtTime(msg, nextTimeout);}}...}}/*
dumpsys power | grep mScreenOffTimeoutSettingmScreenOffTimeoutSetting=2147483647
*/private int getScreenOffTimeoutLocked(int sleepTimeout) {//-1int timeout = mScreenOffTimeoutSetting;//2147483647if (isMaximumScreenOffTimeoutFromDeviceAdminEnforcedLocked()) {timeout = Math.min(timeout, mMaximumScreenOffTimeoutFromDeviceAdmin);}if (mUserActivityTimeoutOverrideFromWindowManager >= 0) {timeout = (int)Math.min(timeout, mUserActivityTimeoutOverrideFromWindowManager);}if (sleepTimeout >= 0) {timeout = Math.min(timeout, sleepTimeout);}return Math.max(timeout, mMinimumScreenOffTimeoutConfig);}//用户长时间不操作后:private void handleUserActivityTimeout() { // runs on handler threadsynchronized (mLock) {if (DEBUG_SPEW) {Slog.d(TAG, "handleUserActivityTimeout");}mDirty |= DIRTY_USER_ACTIVITY;updatePowerStateLocked();}}/*** Updates the global power state based on dirty bits recorded in mDirty.** This is the main function that performs power state transitions.* We centralize them here so that we can recompute the power state completely* each time something important changes, and ensure that we do it the same* way each time.  The point is to gather all of the transition logic here.*/private void updatePowerStateLocked() {...// Phase 2: Update display power state.boolean displayBecameReady = updateDisplayPowerStateLocked(dirtyPhase2);// Phase 3: Update dream state (depends on display ready signal).updateDreamLocked(dirtyPhase2, displayBecameReady);// Phase 4: Send notifications, if needed.finishWakefulnessChangeIfNeededLocked();...} finally {Trace.traceEnd(Trace.TRACE_TAG_POWER);}}/*** Determines whether to post a message to the sandman to update the dream state.*/private void updateDreamLocked(int dirty, boolean displayBecameReady) {if ((dirty & (DIRTY_WAKEFULNESS| DIRTY_USER_ACTIVITY| DIRTY_WAKE_LOCKS| DIRTY_BOOT_COMPLETED| DIRTY_SETTINGS| DIRTY_IS_POWERED| DIRTY_STAY_ON| DIRTY_PROXIMITY_POSITIVE| DIRTY_BATTERY_STATE)) != 0 || displayBecameReady) {if (mDisplayReady) {scheduleSandmanLocked();}}}private void scheduleSandmanLocked() {if (!mSandmanScheduled) {mSandmanScheduled = true;Message msg = mHandler.obtainMessage(MSG_SANDMAN);msg.setAsynchronous(true);mHandler.sendMessage(msg);}}private void handleSandman() { // runs on handler thread// Handle preconditions....// Doze has ended or will be stopped.  Update the power state.reallyGoToSleepNoUpdateLocked(SystemClock.uptimeMillis(), Process.SYSTEM_UID);updatePowerStateLocked();}}// Stop dream.if (isDreaming) {mDreamManager.stopDream(false /*immediate*/);}}// Done dozing, drop everything and go to sleep.private boolean reallyGoToSleepNoUpdateLocked(long eventTime, int uid) {if (DEBUG_SPEW) {Slog.d(TAG, "reallyGoToSleepNoUpdateLocked: eventTime=" + eventTime+ ", uid=" + uid);}if (eventTime < mLastWakeTime || mWakefulness == WAKEFULNESS_ASLEEP|| !mBootCompleted || !mSystemReady) {return false;}Trace.traceBegin(Trace.TRACE_TAG_POWER, "reallyGoToSleep");try {Slog.i(TAG, "Sleeping (uid " + uid +")...");setWakefulnessLocked(WAKEFULNESS_ASLEEP, PowerManager.GO_TO_SLEEP_REASON_TIMEOUT);} finally {Trace.traceEnd(Trace.TRACE_TAG_POWER);}return true;}

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Android 8.1 修改锁屏显示时间

平台

需求

补丁

跟踪

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