- 안드로이드 어플리케이션에서 배터리 상태를 체크하기 위한 방법 -
BatteryManager class 사용하여 구현
(developer site link)
http://developer.android.com/reference/android/os/BatteryManager.html
방법은 구현하고자 하는 app. 에 BroadcastReceiver 를 추가하여, 'ACTION_BATTERY_CHANGED' 가 올때, 필요한 값들을 체크하여 사용하면 된다.
(ACTION_BATTERY_CHANGED 관련 developer site link)
http://developer.android.com/reference/android/content/Intent.html#ACTION_BATTERY_CHANGED
아래 샘플코드에서는 연결상태, 배터리상태, 배터리레벨 에 대해서 확인이 가능하도록 만들었다.
로그상 값만을 간단히 확인 가능하도록 만들었으며, 확장을 위해 context 등 불필요 코드가 몇가지 있으나, 실행에는 무관하다.
// 추가 : BroadcastReceiver 의 용법에 대해 주의해서 봐둔다.
UI 는 없으며, 아래 같이 로그에서만 확인이 가능함을 밝힌다.
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Colorized version of the entered code
package com.BatteryChecker;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
public class BatteryCheckMain extends Activity
{
private static final String tag = "BatteryChecker";
private static final String filetag = "<BatteryCheckMain> / ";
private Context context;
private BroadcastReceiver mBatteryBroadcastReceiver;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
context = this;
initBroadcastReceiver(context);
registerBatteryReceiver(context);
Log.i(tag, filetag + "PLUGED:" + BatteryManager.EXTRA_PLUGGED + "/LEVEL:" + BatteryManager.EXTRA_LEVEL
+ "/STATUS:" + BatteryManager.EXTRA_STATUS);
setContentView(R.layout.main);
}
@Override
protected void onDestroy()
{
// TODO Auto-generated method stub
super.onDestroy();
Log.i(tag, filetag + "onDeatroy()");
unregisterReceiver(mBatteryBroadcastReceiver);
}
@Override
protected void onPause()
{
// TODO Auto-generated method stub
super.onPause();
}
@Override
protected void onResume()
{
// TODO Auto-generated method stub
super.onResume();
}
// LOCAL FUNCTION -----------------------------------------------------------------------------
// make battery broadcast receiver
boolean initBroadcastReceiver(Context context)
{
mBatteryBroadcastReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
final String action = intent.getAction();
Log.i(tag, filetag + "mBatteryBroadcastReceiver - onReceive()/action:" +action);
if(Intent.ACTION_BATTERY_CHANGED.equals(action))
{
Log.i(tag, filetag + "PLUG:" + intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0)
+ " / STATUS:" + intent.getIntExtra(BatteryManager.EXTRA_STATUS, BatteryManager.BATTERY_STATUS_UNKNOWN)
+ " / LEVEL:" + intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0));
}
}
@Override
public IBinder peekService(Context myContext, Intent service)
{
// TODO Auto-generated method stub
return super.peekService(myContext, service);
}
};
return true;
} //initBroadcastReceiver
boolean registerBatteryReceiver(Context context)
{
Log.i(tag, filetag + "registerBatteryReceiver()");
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_BATTERY_CHANGED);
filter.addAction(Intent.ACTION_BATTERY_LOW);
registerReceiver(mBatteryBroadcastReceiver, filter);
return true;
}
}
