[Android] 배터리 잔여량 확인

MainActivity.java


package com.example.study;

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.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
	private Button btn;
	int level,tem;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=(Button)findViewById(R.id.btn);
        registerReceiver(mBattery,new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        btn.setOnClickListener(new OnClickListener(){
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(v.getId()==R.id.btn)
					Toast.makeText(MainActivity.this, toString().valueOf(level), Toast.LENGTH_SHORT).show();
			}
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
    private BroadcastReceiver mBattery = new BroadcastReceiver(){

		@Override
		public void onReceive(Context arg0, Intent arg1) {
			// TODO Auto-generated method stub
                        //배터리량을 가져옴
			level=arg1.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
                        //배터리 온도를 가져옴
                        tem=arg1.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, 0);
			}
    };
}