android 4.2 系统增永不休眠同时隐藏休眠选项

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，        <integername="def_screen_off_timeout">-1</integer>2. android\packages\apps\Settings\res\values\arrays.xml文件增加两项，标红选项。    <!--Display settings.  The delay ininactivity before the screen is turned off. These are shown ain a list dialog.-->    <string-arrayname="screen_timeout_entries">        <item>15 seconds</item>        <item>30 seconds</item>        <item>1 minute</item>        <item>2 minutes</item>        <item>10 minutes</item>        <item>30 minutes</item>        <item>never</item>    </string-array>    <!-- Do not translate. -->   <string-array  name="screen_timeout_values"translatable="false">        <!-- Do not translate. -->        <item>15000</item>        <!-- Do not translate. -->        <item>30000</item>        <!-- Do not translate. -->        <item>60000</item>        <!-- Do not translate. -->        <item>120000</item>        <!-- Do not translate. -->        <item>600000</item>        <!-- Do not translate. -->        <item>1800000</item>         <item>-1</item>    </string-array>3. android\packages\apps\Settings\res\values-zh-rCN中增加永不休眠对应的中文    <string-arrayname="screen_timeout_entries">    <itemmsgid="3342301044271143016">"15 秒"</item>    <itemmsgid="8881760709354815449">"30 秒"</item>    <item msgid="7589406073232279088">"1分钟"</item>    <itemmsgid="7001195990902244174">"2 分钟"</item>    <itemmsgid="7489864775127957179">"5 分钟"</item>    <itemmsgid="2314124409517439288">"10 分钟"</item>    <itemmsgid="6864027152847611413">"30 分钟"</item>    <item msgid="9989898989898989898">"永不休眠"</item>    </string-array>4./services/Java/com/android/server/power/PowerManagerService.javaprivate 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 <nextTimeout) {                            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.javaprivatevoid 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 <values.length; 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 itemgetPreferenceScreen().removePreference(mScreenTimeoutPreference);