How java uses broadcasts to see power changes
Editor to share with you how java uses radio to check electricity changes, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's learn about it!
Public class BatteryChangedReceiver extends BroadcastReceiver {
@ Override
Public void onReceive (Context context, Intent intent) {
/ / current power
Int currLevel = intent.getIntExtra (BatteryManager.EXTRA_LEVEL, 0)
/ / Total electricity
Int total = intent.getIntExtra (BatteryManager.EXTRA_SCALE, 1)
Int percent = currLevel * 100 / total
}
}
Configure the following XMl in the manifest file:
Get the power immediately instead of waiting for the power to change, such as showing the battery immediately when the reader is turned on. We can obtain it in the following ways:
Intent batteryIntent = getApplicationContext () .registerReceiver (null
New IntentFilter (Intent.ACTION_BATTERY_CHANGED))
Int currLevel = batteryIntent.getIntExtra (BatteryManager.EXTRA_LEVEL, 0)
Int total = batteryIntent.getIntExtra (BatteryManager.EXTRA_SCALE, 1)
Int percent = currLevel * 100 / total
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