[android-developers] Re: battery consumption

When you call registerReceiver, specifying an Intent Filter that matches a sticky Broadcast Intent, the return value will be the last Intent broadcast, such as the battery-level changed broadcast:

 

IntentFilter battery = new IntentFilter( Intent.ACTION_BATTERY_CHANGED);

Intent currentBatteryCharge = registerReceiver( null, battery); 

As shown in the preceding snippet, it is not necessary to specify a Receiver to obtain the current value of a sticky Intent. As a result, many of the system device state broadcasts (such as battery and docking state) use sticky Intents to improve efficiency. These are examined in more detail later in this chapter. To broadcast your own sticky Intents, your application must have the BROADCAST_STICKY uses-permission before calling sendStickyBroadcast and passing in the relevant Intent: sendStickyBroadcast( intent); To remove a sticky Intent, call removeStickyBroadcast, passing in the sticky Intent to remove: removeStickyBroadcast( intent);

Meier, Reto (2012-04-05). Professional Android 4 Application Development (Wrox Professional Guides) (Kindle Locations 4825-4838). John Wiley and Sons. Kindle Edition. 

On Tuesday, January 1, 2013 12:23:17 AM UTC-6, Jiggy wrote:

Hi there,


I would like to get the battery consumption for sending an SMS or downloading data (~1MB) from server. 


Currently, I am using following way to get the information about battery voltage, level and etc. 




private void getBatLevel(){ 

BroadcastReceiver batteryLevelReceiver = new BroadcastReceiver() { 

public void onReceive(Context context, Intent intent) { 

int scale = -1; 

int level = -1; 

int voltage = -1; 

int temp = -1; 

context.unregisterReceiver(this); 

level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1); 

scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1); 

temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1); 

voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, -1); 

batUsageString.setText(String.valueOf(voltage)); 

Log.d("DEBUG", "level is "+level+"/"+scale+", temp is "+temp+", voltage is "+voltage); 

} 

}; 

IntentFilter batteryLevelFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); 

registerReceiver(batteryLevelReceiver, batteryLevelFilter); 

}




I would like to know if there is any other way to get the precise information about battery (I mean in float or double)




PS: I am calling above method before and after sending an SMS.

Thanks




Regards

Jiggy

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