@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.registerReceiver(this.batteryInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
chargeTimer2();
}
int j = 20;
public void chargeTimer2(){
if(statusString.equals("Charging (USB)") || statusString.equals("Charging (AC)")){
timer = new CountDownTimer(20*1000, 1000){
@Override
public void onTick(long millisUntilFinished){
j--;
chargeMinute.setText(j+"");
}
@Override
public void onFinish() {
timer.cancel();
}
};
timer.start();
}
else{
timer.cancel();
}
}
private BroadcastReceiver batteryInfoReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
level= intent.getIntExtra(BatteryManager.EXTRA_LEVEL,0);
int plugged= intent.getIntExtra(BatteryManager.EXTRA_PLUGGED,0);
int status= intent.getIntExtra(BatteryManager.EXTRA_STATUS,0);
if(status == BatteryManager.BATTERY_STATUS_CHARGING) {
statusString = ("Charging");
if(plugged > 0){
statusString = statusString + " " + ((plugged == BatteryManager.BATTERY_PLUGGED_AC)? "(AC)": "(USB)");
Toast.makeText(MainActivity.this, "충전을 시작합니다", Toast.LENGTH_SHORT).show();
}else if(status == BatteryManager.BATTERY_STATUS_DISCHARGING) {
statusString = ("Discharging");
} else if (status == BatteryManager.BATTERY_STATUS_NOT_CHARGING) {
statusString = ("Not charging");
} else if (status == BatteryManager.BATTERY_STATUS_FULL) {
statusString = ("Full");
} else {
statusString = ("Unknown");
}
chargingStatus.setText(statusString);
// chargeTimer();
}
};
11번줄에서 nullpointerException 발생이 되는데요.
왜 그런지 모르겠어요