# Copyright 2015 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import re
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import subprocess
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import sys
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import time
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DISPLAY_LEVEL = 96 # [0:255] Depends on tablet model. Adjust for best result.
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DISPLAY_CMD_WAIT = 0.5 # seconds. Screen commands take time to have effect
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DISPLAY_TIMEOUT = 1800000 # ms
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def main():
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"""Power up and unlock screen as needed."""
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screen_id = None
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display_level = DISPLAY_LEVEL
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for s in sys.argv[1:]:
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if s[:7] == 'screen=' and len(s) > 7:
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screen_id = s[7:]
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if s[:11] == 'brightness=' and len(s) > 11:
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display_level = int(s[11:])
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if display_level < 0 or display_level > 255:
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print 'Invalid brightness value. Range is [0-255]'
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display_level = DISPLAY_LEVEL
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if not screen_id:
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print 'Error: need to specify screen serial'
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assert False
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# turn on screen if necessary and unlock
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cmd = ('adb -s %s shell dumpsys display | egrep "mScreenState"'
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% screen_id)
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process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
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cmd_ret = process.stdout.read()
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screen_state = re.split(r'[s|=]', cmd_ret)[-1]
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power_event = ('adb -s %s shell input keyevent POWER' % screen_id)
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subprocess.Popen(power_event.split())
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time.sleep(DISPLAY_CMD_WAIT)
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if 'ON' in screen_state:
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print 'Screen was ON. Toggling to refresh.'
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subprocess.Popen(power_event.split())
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time.sleep(DISPLAY_CMD_WAIT)
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else:
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print 'Screen was OFF. Powered ON.'
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unlock = ('adb -s %s wait-for-device shell wm dismiss-keyguard'
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% screen_id)
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subprocess.Popen(unlock.split())
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time.sleep(DISPLAY_CMD_WAIT)
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# set to manual mode and set brightness
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manual = ('adb -s %s shell settings put system screen_brightness_mode 0'
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% screen_id)
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subprocess.Popen(manual.split())
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time.sleep(DISPLAY_CMD_WAIT)
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print 'Tablet display brightness set to %d' % display_level
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bright = ('adb -s %s shell settings put system screen_brightness %d'
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% (screen_id, display_level))
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subprocess.Popen(bright.split())
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time.sleep(DISPLAY_CMD_WAIT)
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# set screen to dim at max time (30min)
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stay_bright = ('adb -s %s shell settings put system screen_off_timeout %d'
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% (screen_id, DISPLAY_TIMEOUT))
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subprocess.Popen(stay_bright.split())
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time.sleep(DISPLAY_CMD_WAIT)
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if __name__ == '__main__':
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main()
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