Android设置系统开机自动永不休眠
android4.2系统增永不休眠同时隐藏休眠选项
1. android\frameworks\base\packages\SettingsProvider\res\values\defaults.xml中设置def_screen_off_timeout为-1，
2. android\packages\apps\Settings\res\values\arrays.xml文件增加两项，标红选项。
3. android\packages\apps\Settings\res\values-zh-rCN中增加永不休眠对应的中文
4./services/java/com/android/server/power/PowerManagerService.java
private int getScreenOffTimeoutLocked() {
int DonotSleeptimeout;
int timeout =mScreenOffTimeoutSetting;
if(isMaximumScreenOffTimeoutFromDeviceAdminEnforcedLocked()) {
timeout = Math.min(timeout,mMaximumScreenOffTimeoutFromDeviceAdmin);
if(mUserActivityTimeoutOverrideFromWindowManager >= 0) {
timeout = (int)Math.min(timeout,mUserActivityTimeoutOverrideFromWindowManager);
}
DonotSleeptimeout = mScreenOffTimeoutSetting;
if(DonotSleeptimeout < 0)
{
DonotSleeptimeout= mMaximumScreenOffTimeoutFromDeviceAdmin ;
returnMath.max(DonotSleeptimeout, mMaximumScreenOffTimeoutFromDeviceAdmin);
}
return Math.max(timeout,MINIMUM_SCREEN_OFF_TIMEOUT);
}
privatevoid updateUserActivitySummaryLocked(long now, int dirty) {
// Update the status of the useractivity timeout timer.
if ((dirty & (DIRTY_USER_ACTIVITY |DIRTY_WAKEFULNESS | DIRTY_SETTINGS)) != 0) {
mHandler.removeMessages(MSG_USER_ACTIVITY_TIMEOUT);
long nextTimeout = 0;
if (mWakefulness !=WAKEFULNESS_ASLEEP) {
final int screenOffTimeout =getScreenOffTimeoutLocked();
final int screenDimDuration =getScreenDimDurationLocked(screenOffTimeout);
mUserActivitySummary = 0;
if (mLastUserActivityTime >=mLastWakeTime) {
nextTimeout =mLastUserActivityTime
+ screenOffTimeout- screenDimDuration;
if (now < nextTimeout) {
mUserActivitySummary |=USER_ACTIVITY_SCREEN_BRIGHT;
} else {
nextTimeout =mLastUserActivityTime + screenOffTimeout;
if (now
mUserActivitySummary|= USER_ACTIVITY_SCREEN_DIM;
}
}
}
if (mUserActivitySummary == 0
&&mLastUserActivityTimeNoChangeLights >= mLastWakeTime) {
nextTimeout =mLastUserActivityTimeNoChangeLights + screenOffTimeout;
if (now < nextTimeout
&&mDisplayPowerRequest.screenState
!=DisplayPowerRequest.SCREEN_STATE_OFF) {
mUserActivitySummary =mDisplayPowerRequest.screenState
==DisplayPowerRequest.SCREEN_STATE_BRIGHT ?
USER_ACTIVITY_SCREEN_BRIGHT : USER_ACTIVITY_SCREEN_DIM;
}
}
if (mUserActivitySummary != 0&&mScreenOffTimeoutSetting > 0) {
Message msg =mHandler.obtainMessage(MSG_USER_ACTIVITY_TIMEOUT);
msg.setAsynchronous(true);
mHandler.sendMessageAtTime(msg,nextTimeout);
}
} else {
mUserActivitySummary = 0;
}
if (DEBUG_SPEW) {
Slog.d(TAG,"updateUserActivitySummaryLocked: mWakefulness="
+wakefulnessToString(mWakefulness)
+ ",mUserActivitySummary=0x" + Integer.toHexString(mUserActivitySummary)
+ ",nextTimeout=" + TimeUtils.formatUptime(nextTimeout));
}
}
}
5. /android/packages/apps/Settings/src/com/android/settings/ DisplaySettings.java
privatevoid updateTimeoutPreferenceDescription(long currentTimeout) {
ListPreference preference =mScreenTimeoutPreference;
String summary;
if (currentTimeout < -1) {
// Unsupported value
summary = "";
} else {
final CharSequence[] entries =preference.getEntries();
final CharSequence[] values =preference.getEntryValues();
if (entries == null ||entries.length == 0) {
summary = "";
} else {
int best = 0;
for (int i = 0; i
long timeout =Long.parseLong(values[i].toString());
if (currentTimeout >=timeout) {
best = i;
}
}
summary = preference.getContext().getString(R.string.screen_timeout_summary,
entries[best]);
if(currentTimeout < 0)summary =entries[best].toString();
}
}
preference.setSummary(summary);
}
onCreate方法中隐藏休眠选项：
mScreenTimeoutPreference= (ListPreference) findPreference(KEY_SCREEN_TIMEOUT);
final long currentTimeout =Settings.System.getLong(resolver, SCREEN_OFF_TIMEOUT,
FALLBACK_SCREEN_TIMEOUT_VALUE);
mScreenTimeoutPreference.setValue(String.valueOf(currentTimeout));
mScreenTimeoutPreference.setOnPreferenceChangeListener(this);
disableUnusableTimeouts(mScreenTimeoutPreference);
updateTimeoutPreferenceDescription(currentTimeout);
//hide sleep item
getPreferenceScreen().removePreference(mScreenTimeoutPreference);