This simple app can help you increase the standby time of your device:
WiFi Automatic automatically disable your WiFi radio when you don't need it and thereby lowers the battery consumption.
You can also specify to automatically turn on WiFi again, if you turn on your device or when you enter a specified location (requires a cell radio and therefore does not work on WiFi-only tablets!). Also, the app can regularly scan for available networks to connect to and re-disable WiFi if no suitable network is found. This way, you are always connected to your WiFi network when using the device.
WiFi Automatic is open source: https://github.com/j4velin/WiFi-Automatic
A WiFi connection generally uses less power than a mobile data connection, so on your phone, it makes sense to keep the WiFi radio active, whenever a WiFi network is in range
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Permissions:
RECEIVE_BOOT_COMPLETED - is required to start the service again when rebooting your device
The following permissions are required to observe and change the WiFi state:
CHANGE_WIFI_STATE
ACCESS_NETWORK_STATE
ACCESS_WIFI_STATE
The following permissions are required to the "turn on WiFi when entering these locations" feature:
INTERNET
WRITE_EXTERNAL_STORAGE
ACCESS_COARSE_LOCATION
ACCESS_FINE_LOCATION
BILLING
这个简单的应用程序可以帮助您提高设备的待机时间：
无线自动自动禁用WiFi无线电，当你不需要它，从而降低电池消耗。
您还可以指定自动开启无线再说，如果你把你的设备上，或当你输入一个指定的位置（需要一个小区无线电，因此不会对WiFi的唯一工作片！）。另外，应用程序可以定期扫描可用的网络来连接和重新禁用无线如果没有合适的网络被发现。通过这种方式，您正在使用的设备时，始终连接到WiFi网络。
无线自动的是开源：https://github.com/j4velin/WiFi-Automatic
WiFi连接一般采用更少的功率比移动数据连接，所以你的手机上，这是有道理的，以保持WiFi无线电活跃，每当一个WiFi网络在范围内
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权限：
RECEIVE_BOOT_COMPLETED - 需要重新启动设备，当再次启动该服务
下面的权限，必须遵守和更改的WiFi状态：
CHANGE_WIFI_STATE
ACCESS_NETWORK_STATE
ACCESS_WIFI_STATE
下面的权限要求的“进入这些场所时，打开无线网络”功能：
互联网
WRITE_EXTERNAL_STORAGE
ACCESS_COARSE_LOCATION
ACCESS_FINE_LOCATION
计费
WiFi Auto-Off更新内容
1.7: Fixed some rare crashes when no web browser is available on device
1.6.9: Fix: App will turn off WiFi if already connected when receiving a LOCATION_ENTERED
1.6.8: french translation updated
1.6.6:
changed "turn WiFi on when connected to external power supply" option to KEEP wifi on WHILE connected to external power
1.6.5:
- implemented Android M runtime permissions
- fixed issue with "active location scanning"
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