I have made a CountDownTimer that works perfectly - you can get the correct time for soft/medium/hard-boiling an egg. My problem is that the timer resets after orientation change. I have googled and tried so many solution, still I don't understand how to use the onSave and onRestore properly. Here's my code:
Any tips?
package com.dohman.boilaneggbae;
import android.graphics.PorterDuff;
import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
public class MainActivity extends AppCompatActivity {
private static final String CURRENT_TIME = "currentTime";
private static final String DURATION_TIME = "durationTime";
private long currentTime;
private int durationTime;
private TextView time;
private Button buttonLargeSize;
private Button buttonMediumSize;
private Button buttonSoft;
private Button buttonMedium;
private Button buttonHard;
private Button buttonHellaHard;
private CountDownTimer countDownTimer;
private EggSize mediumOrLarge = EggSize.UNDEFINED;
private boolean alreadyRunning = false;
enum EggSize {
UNDEFINED, MEDIUM, LARGE;
}
private View.OnClickListener btnMediumSizeClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
mediumOrLarge = EggSize.MEDIUM;
}
};
private View.OnClickListener btnLargeSizeClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
mediumOrLarge = EggSize.LARGE;
}
};
private View.OnClickListener btnSoftClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
if ((mediumOrLarge != EggSize.UNDEFINED) && (alreadyRunning == false)) {
alreadyRunning = true;
durationTime = 240;
start(240);
} else if (mediumOrLarge == EggSize.UNDEFINED) {
time.setText("Choose size first");
} else {
alreadyRunning = false;
cancel();
}
}
};
@Override
protected void onSaveInstanceState(Bundle savedInstanceState) {
savedInstanceState.putLong(CURRENT_TIME, currentTime);
savedInstanceState.putInt(DURATION_TIME, durationTime);
super.onSaveInstanceState(savedInstanceState);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState != null) {
currentTime = savedInstanceState.getLong(CURRENT_TIME);
durationTime = savedInstanceState.getInt(DURATION_TIME);
}
time = findViewById(R.id.time);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
currentTime = savedInstanceState.getLong(CURRENT_TIME);
durationTime = savedInstanceState.getInt(DURATION_TIME);
currentTime -= durationTime;
}
private void start(int duration) {
time.setText("");
if (mediumOrLarge == EggSize.MEDIUM) {
duration -= 60;
}
countDownTimer = new CountDownTimer(duration * 1000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
String text = String.format(Locale.getDefault(), "%02d:%02d",
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) % 60,
TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) % 60);
time.setText(text);
}
countDownTimer.start();
}
}
I finally solved this! Using this link: https://codinginflow.com/code-examples/android/countdown-timer/part-2
Those are the codes:
package com.codinginflow.countdowntimerexample;
import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
private static final long START_TIME_IN_MILLIS = 600000;
private TextView mTextViewCountDown;
private Button mButtonStartPause;
private Button mButtonReset;
private CountDownTimer mCountDownTimer;
private boolean mTimerRunning;
private long mTimeLeftInMillis = START_TIME_IN_MILLIS;
private long mEndTime;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextViewCountDown = findViewById(R.id.text_view_countdown);
mButtonStartPause = findViewById(R.id.button_start_pause);
mButtonReset = findViewById(R.id.button_reset);
mButtonStartPause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mTimerRunning) {
pauseTimer();
} else {
startTimer();
}
}
});
mButtonReset.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
resetTimer();
}
});
updateCountDownText();
}
private void startTimer() {
mEndTime = System.currentTimeMillis() + mTimeLeftInMillis;
mCountDownTimer = new CountDownTimer(mTimeLeftInMillis, 1000) {
@Override
public void onTick(long millisUntilFinished) {
mTimeLeftInMillis = millisUntilFinished;
updateCountDownText();
}
@Override
public void onFinish() {
mTimerRunning = false;
updateButtons();
}
}.start();
mTimerRunning = true;
updateButtons();
}
private void pauseTimer() {
mCountDownTimer.cancel();
mTimerRunning = false;
updateButtons();
}
private void resetTimer() {
mTimeLeftInMillis = START_TIME_IN_MILLIS;
updateCountDownText();
updateButtons();
}
private void updateCountDownText() {
int minutes = (int) (mTimeLeftInMillis / 1000) / 60;
int seconds = (int) (mTimeLeftInMillis / 1000) % 60;
String timeLeftFormatted = String.format(Locale.getDefault(), "%02d:%02d", minutes, seconds);
mTextViewCountDown.setText(timeLeftFormatted);
}
private void updateButtons() {
if (mTimerRunning) {
mButtonReset.setVisibility(View.INVISIBLE);
mButtonStartPause.setText("Pause");
} else {
mButtonStartPause.setText("Start");
if (mTimeLeftInMillis < 1000) {
mButtonStartPause.setVisibility(View.INVISIBLE);
} else {
mButtonStartPause.setVisibility(View.VISIBLE);
}
if (mTimeLeftInMillis < START_TIME_IN_MILLIS) {
mButtonReset.setVisibility(View.VISIBLE);
} else {
mButtonReset.setVisibility(View.INVISIBLE);
}
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putLong("millisLeft", mTimeLeftInMillis);
outState.putBoolean("timerRunning", mTimerRunning);
outState.putLong("endTime", mEndTime);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
mTimeLeftInMillis = savedInstanceState.getLong("millisLeft");
mTimerRunning = savedInstanceState.getBoolean("timerRunning");
updateCountDownText();
updateButtons();
if (mTimerRunning) {
mEndTime = savedInstanceState.getLong("endTime");
mTimeLeftInMillis = mEndTime - System.currentTimeMillis();
startTimer();
}
}
}
EDIT: For some reason I can't mark my own answer as a solution, but this problem is solved anyway. (Answered)