We Keep Coding

Android studio not saving variable

Hello so I have a App about a fact and tip each 24 hours it displays a fact or tip!
I am pretty new to Android studio anyways to keep track of the fact and tip the user is in I used a variabe "timing" in the start timer i put when the mTimeLeftInMillis == 0 then make timing = 1 and if timing == 1 then do that but ya for that it's not the case!
when the user leaves the timing variable resets and goes back to 124!
Could someone please help me! I tried to do shared perferences in it but It didn't work!
here is my java code!
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private static final long START_TIME_IN_MILLIS = 30000;
Button tip;
TextView texttip;
TextView textfact;
Button next;
Button back;
private TextView mTextViewCountDown;
private Button mButtonStartPause;
private Button mButtonStart;
private CountDownTimer mCountDownTimer;
private boolean mTimerRunning;
private long mTimeLeftInMillis;
private long mEndTime;
private long timing = 124;
#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);
next = (Button)findViewById(R.id.next);
next.setOnClickListener(this);
back = (Button)findViewById(R.id.back);
back.setOnClickListener(this);
mButtonStart = findViewById(R.id.tip);
tip = (Button) findViewById(R.id.tip);
texttip = (TextView)findViewById(R.id.texttip);
textfact = (TextView)findViewById(R.id.textfact);
mButtonStartPause.setOnClickListener((new View.OnClickListener() {
#Override
public void onClick(View v) {
if(mTimerRunning) {
mButtonStartPause.setText("fact ");
} else {
startTimer();
}
}
}));
mButtonStart.setOnClickListener((new View.OnClickListener() {
#Override
public void onClick(View v) {
if(mTimerRunning) {
mButtonStart.setText("Tip");
} else {
startTimer();
}
}
}));
}
#Override
public void onClick(View view) {
if(view.getId() == R.id.next){
tip.setVisibility(view.INVISIBLE);
mButtonStartPause.setVisibility(View.INVISIBLE);
mButtonStart.setVisibility(View.INVISIBLE);
textfact.setVisibility(View.INVISIBLE);
texttip.setVisibility(View.INVISIBLE);
mTextViewCountDown.setVisibility(View.INVISIBLE);
next.setVisibility(View.INVISIBLE);
back.setVisibility(View.VISIBLE);
}
if (view.getId() == R.id.back){
tip.setVisibility(View.VISIBLE);
mButtonStart.setVisibility(View.VISIBLE);
mButtonStartPause.setVisibility(View.VISIBLE);
textfact.setVisibility(View.VISIBLE);
texttip.setVisibility(View.VISIBLE);
mTextViewCountDown.setVisibility(View.VISIBLE);
next.setVisibility(View.VISIBLE);
back.setVisibility(View.INVISIBLE);
}
}
private void startTimer() {
if (timing == 5) {
mTimeLeftInMillis = START_TIME_IN_MILLIS;
updateCountDownText();
updateButtons();
textfact.setText("Makeup was invented by egypt");
texttip.setText("Spend time with a loved one");
} else{
mButtonStartPause.setText("fact ");
}
if (timing == 4) {
timing = 5;
mTimeLeftInMillis = START_TIME_IN_MILLIS;
updateCountDownText();
updateButtons();
textfact.setText("The US flag was designed by a student");
texttip.setText("Its okay to make mistakes because you will learn from them");
} else{
mButtonStartPause.setText("fact ");
}
if (timing == 3) {
timing = 4;
mTimeLeftInMillis = START_TIME_IN_MILLIS;
updateCountDownText();
updateButtons();
textfact.setText("DID YOU KNOW THAT SCOTLAND HAS 421 WORDS FOR SNOW!!!");
texttip.setText("Don't compare your self to others!");
} else{
mButtonStartPause.setText("fact ");
}
if (timing == 2) {
timing = 3;
mTimeLeftInMillis = START_TIME_IN_MILLIS;
updateCountDownText();
updateButtons();
textfact.setText("There is no q in all 50 states of US!");
texttip.setText("Do what you live. The purpose of life is to be happy!");
} else{
mButtonStartPause.setText("fact ");
}
if (timing == 1) {
timing = 2;
mTimeLeftInMillis = START_TIME_IN_MILLIS;
updateCountDownText();
updateButtons();
textfact.setText("The phillipines has about 7,641 islands!!");
texttip.setText("Develop good habits! Like running outside could benefit you and your mental health and your body by alot!");
} else{
mButtonStartPause.setText("fact ");
}
if (mTimeLeftInMillis == 0 && timing == 124) {
timing = 1;
mTimeLeftInMillis = START_TIME_IN_MILLIS;
updateCountDownText();
updateButtons();
textfact.setText("Sudan has the most pyramids in the world");
texttip.setText("Look for knowledge not results");
textfact.setVisibility(View.VISIBLE);
texttip.setVisibility(View.VISIBLE);
} else{
mButtonStartPause.setText("fact ");
}
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 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){
mButtonStartPause.setText("fact");
}else {
mButtonStartPause.setText("fact");
if (mTimeLeftInMillis < 1000) {
mButtonStartPause.setVisibility(View.VISIBLE);
} else {
mButtonStartPause.setVisibility(View.VISIBLE);
}
}
}
#Override
protected void onStop() {
super.onStop();
SharedPreferences prefs = getSharedPreferences("prefs", MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putLong("millisLeft", mTimeLeftInMillis);
editor.putBoolean("timerRunning", mTimerRunning);
editor.putLong("endTime", mEndTime);
editor.apply();
}
#Override
protected void onStart() {
super.onStart();
SharedPreferences prefs = getSharedPreferences("prefs", MODE_PRIVATE);
mTimeLeftInMillis = prefs.getLong("millisLeft", START_TIME_IN_MILLIS);
mTimerRunning = prefs.getBoolean("timerRunning", false);
updateCountDownText();
updateButtons();
if (mTimerRunning) {
mEndTime = prefs.getLong("endTime", 0);
mTimeLeftInMillis = mEndTime - System.currentTimeMillis();
if (mTimeLeftInMillis < 0) {
mTimeLeftInMillis = 0;
mTimerRunning = false;
updateCountDownText();
updateButtons();
} else{
startTimer();
}
}
}
}
I tried making two timers and the other timer will save it because i know how to do shared preferences on timers but not on stuff like that but it didn't work also because errors started coming!
I wanted the timing thing to save.

Countdown timer which runs in the background in android

Here is my fully functional code in which when I press the button, the button gets disabled and the countdown timer gets started and whenever it gets over button gets enabled. My problem is that if I leave that activity the process resets.
My question is how that can be done in the background so even if I close the application the timer runs in the background?
package com.mycompany.myapp;
import android.app.*;
import android.os.*;
import android.widget.*;
import android.view.View.*;
import android.view.*;
public class MainActivity extends Activity {
Button btnCountdown;
TextView tvCountdown;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnCountdown = findViewById(R.id.btnCountdown);
tvCountdown = findViewById(R.id.tvCountdown);
btnCountdown.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Timer();
btnCountdown.setEnabled(false);
}
});
}
private void Timer() {
new CountDownTimer(30*1000,1000) {
#Override
public void onTick(long millisUntilFinished) {
long second = (millisUntilFinished / 1000) % 60;
long minutes = (millisUntilFinished / (1000*60)) % 60;
tvCountdown.setText(minutes + ":" + second);
}
#Override
public void onFinish() {
tvCountdown.setText("Fin");
btnCountdown.setEnabled(true);
}
}.start();
}
}

Add to your AndroidManifest.xml
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
BroadcastReceiver.java
public class BroadcastReceiver extends AppCompatActivity {
TextView tvTimer, tvTimerRunningState, tvTimerFinishedState;
private static final String TAG = "CountdownTimer";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_broadcast_receiver);
}
public void handleStartTimer(View view) {
Intent intent = new Intent(this, BroadcastService.class);
intent.putExtra("inputExtra", "");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
ContextCompat.startForegroundService(this, intent);
} else {
this.startService(intent);
}
Log.i(TAG, "timerStarted");
}
public void handleCancelTimer (View view) {
Intent intent = new Intent(this, BroadcastService.class);
stopService(intent);
}
/* CountDown */
final private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
updateGUI(intent);
}
};
#Override
public void onResume() {
super.onResume();
registerReceiver(broadcastReceiver, new IntentFilter(BroadcastService.COUNTDOWN_BR));
Log.i(TAG, "Registered broadcast receiver");
}
#Override
public void onPause() {
super.onPause();
unregisterReceiver(broadcastReceiver);
Log.i(TAG, "Unregistered broadcast receiver");
}
#Override
public void onStop() {
try {
unregisterReceiver(broadcastReceiver);
} catch (Exception e) {
// Receiver was probably already stopped in onPause()
}
super.onStop();
}
private void updateGUI(Intent intent) {
if (intent.getExtras() != null) {
long millisUntilFinished = intent.getLongExtra("countdown", 0);
long seconds = (millisUntilFinished / 1000) % 60;
long minutes = (millisUntilFinished / (1000*60)) % 60;
long hours = (millisUntilFinished / (1000*60*60)) % 60;
String time = (hours + " : " + minutes + " : " + seconds);
tvTimer = findViewById(R.id.tvTimer);
tvTimer.setText(time);
boolean countdownTimerRunning = intent.getBooleanExtra("countdownTimerRunning", false);
tvTimerRunningState = findViewById(R.id.tvTimerRunningState);
if (countdownTimerRunning) {
tvTimerRunningState.setText("CountdownTimerRunning");
} else {
tvTimer.setText("0 : 0 : 0");
tvTimerRunningState.setText("CountdownTimerNotRunning");
}
boolean countdownTimerFinished = intent.getBooleanExtra("countdownTimerFinished", false);
tvTimerFinishedState = findViewById(R.id.tvTimerFinishedState);
if (countdownTimerFinished) {
tvTimerFinishedState.setText("Finished");
} else {
tvTimerFinishedState.setText("Unfinished");
}
}
}
activity_broadcast_receiver.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<Button
android:id="#+id/btnStartJob"
android:onClick="handleStartTimer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Start Timer" />
<Button
android:id="#+id/btnStopJob"
android:onClick="handleCancelTimer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Cancel Timer" />
<TextView
android:id="#+id/tvTimer"
android:text="0 : 0 : 0"
android:gravity="center"
android:textSize="30sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/tvTimerFinishedState"
android:gravity="center"
android:textSize="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/tvTimerRunningState"
android:gravity="center"
android:textSize="18sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
BroadcastService.java
public class BroadcastService extends Service {
public static final String CHANNEL_ID = "ForegroundServiceChannel";
private final static String TAG = "BroadcastService";
public static final String COUNTDOWN_BR = "your.package.name";
Intent bi = new Intent(COUNTDOWN_BR);
CountDownTimer cdt = null;
#Override
public void onCreate() {
super.onCreate();
Log.i(TAG, "Starting timer...");
cdt = new CountDownTimer(30000, 1000) {
#Override
public void onTick(long millisUntilFinished) {
Log.i(TAG, "Countdown seconds remaining: " + millisUntilFinished / 1000);
bi.putExtra("countdown", millisUntilFinished);
bi.putExtra("countdownTimerRunning", true);
bi.putExtra("countdownTimerFinished", false);
sendBroadcast(bi);
}
#Override
public void onFinish() {
Log.i(TAG, "Timer finished");
bi.putExtra("countdownTimerFinished", true);
sendBroadcast(bi);
stopForeground(true);
stopSelf();
}
}; cdt.start();
}
#Override
public void onDestroy() {
cdt.cancel();
Log.i(TAG, "Timer cancelled");
bi.putExtra("countdownTimerRunning", false);
sendBroadcast(bi);
super.onDestroy();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
/* Notification */
String input = intent.getStringExtra("inputExtra");
createNotificationChannel();
Intent notificationIntent = new Intent(this, BroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,
0, notificationIntent, 0);
/* NotificationBuilder */
Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
.setContentTitle("Foreground Service")
.setContentText(input)
.setSmallIcon(R.drawable.ic_launcher_background)
.setContentIntent(pendingIntent)
.build();
startForeground(1, notification);
return START_NOT_STICKY;
}
#Nullable
#Override
public IBinder onBind(Intent arg0) {
return null;
}
private void createNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel serviceChannel = new NotificationChannel(
CHANNEL_ID,
"Foreground Service Channel",
NotificationManager.IMPORTANCE_DEFAULT
);
NotificationManager manager = getSystemService(NotificationManager.class);
manager.createNotificationChannel(serviceChannel);
}
}

It is possible to resume countdown timer

Hi I am making simple countdown timer and I would like to resume it after pause. Very important for me is that I won't put my countdown timer to public void method.
mTextViewCountDown = findViewById(R.id.text_view_countdown);
mButtonStartPause = findViewById(R.id.button_start_pause);
mButtonStartPause.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mTimerRunning) {
pauseTimer();
} else {
startTimer();
}
}
});
updateCountDownText();
mCountDownTimer = new CountDownTimer(mTimeLeftInMillis, 1000) {
#Override
public void onTick(long millisUntilFinished) {
mTimeLeftInMillis = millisUntilFinished;
updateCountDownText();
}
#Override
public void onFinish() {
mTimerRunning = false;
}
}.start();
}
private void startTimer() {
mTimerRunning = true;
mCountDownTimer.start();
}
private void pauseTimer() {
mCountDownTimer.cancel();
mTimerRunning = false;
mButtonStartPause.setText("Start");
}
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);
}

it is but you need to make a new instance of the timer and passing the current paused time
read the details here :
Pausing/stopping and starting/resuming Java TimerTask continuously?

Send notifications when the foreground timer stops

I have some troubles with creating a way to send notifications foreground when the timer hits 00:00.
I mean, i want that when the timer ends, it sends a notification event if the app is closed.
I already found a way to show notifications and to make a timer who works even if the app is closed.
But when i put the function to send notification at the end of the timer it only works when the app is opened.
There is my MainActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
notificationManager = NotificationManagerCompat.from(this);
mTextViewCountDown = findViewById(R.id.timerTv);
mButtonStartPause = findViewById(R.id.btn_start_pause);
mButtonReset = findViewById(R.id.btn_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();
}
});
}
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() {
mTimeLeftInMillis=0;
updateCountDownText();
mTimerRunning = false;
updateButtons();
Notification notification = new NotificationCompat.Builder(getApplicationContext(), CHANNEL_1_ID)
.setSmallIcon(R.drawable.ic_money)
.setContentTitle("Test 1")
.setContentText("Important Message")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setCategory(NotificationCompat.CATEGORY_MESSAGE)
.build();
notificationManager.notify(1, notification);
}
}.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
public void onStop() {
super.onStop();
SharedPreferences prefs = getSharedPreferences("pref", MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putLong("millisLeft", mTimeLeftInMillis);
editor.putBoolean("timerRunning", mTimerRunning);
editor.putLong("endTime", mEndTime);
editor.apply();
if (mCountDownTimer != null) {
mCountDownTimer.cancel();
}
}
#Override
public void onStart() {
super.onStart();
SharedPreferences prefs = getSharedPreferences("pref", MODE_PRIVATE);
mTimeLeftInMillis = prefs.getLong("millisLeft", START_TIME_IN_MILLIS);
mTimerRunning = prefs.getBoolean("timerRunning", false);
updateCountDownText();
updateButtons();
if (mTimerRunning) {
mEndTime = prefs.getLong("endTime", 0);
mTimeLeftInMillis = mEndTime - System.currentTimeMillis();
if (mTimeLeftInMillis < 0) {
mTimeLeftInMillis = 0;
mTimerRunning = false;
updateCountDownText();
updateButtons();
} else {
startTimer();
}
}
}
}
App Java Class
public class App extends Application {
public static final String CHANNEL_1_ID = "channel1";
#Override
public void onCreate() {
super.onCreate();
createNotificationChannels();
}
private void createNotificationChannels() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel1 = new NotificationChannel(
CHANNEL_1_ID,
"Channel 1",
NotificationManager.IMPORTANCE_HIGH
);
NotificationManager manager = getSystemService(NotificationManager.class);
manager.createNotificationChannel(channel1);
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.krisix.notificationtest">
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<application
android:name=".App"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".ExampleService"/>
</application>
</manifest>
Thank you for your help !
Have a nice day
Krisix

Thank you for your help sorry i'm a beginner so i'm not sure i understand all the things you told me.
So do you mean something like this ?
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
notificationManager = NotificationManagerCompat.from(this);
mTextViewCountDown = findViewById(R.id.timerTv);
mButtonStartPause = findViewById(R.id.btn_start_pause);
mButtonReset = findViewById(R.id.btn_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();
}
});
}
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() {
mTimeLeftInMillis=0;
updateCountDownText();
mTimerRunning = false;
updateButtons();
if(mTimeLeftInMillis==0){
callNotification();
}
}
}.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
public void onStop() {
super.onStop();
SharedPreferences prefs = getSharedPreferences("pref", MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putLong("millisLeft", mTimeLeftInMillis);
editor.putBoolean("timerRunning", mTimerRunning);
editor.putLong("endTime", mEndTime);
editor.apply();
if (mCountDownTimer != null) {
mCountDownTimer.cancel();
}
}
#Override
public void onStart() {
super.onStart();
SharedPreferences prefs = getSharedPreferences("pref", MODE_PRIVATE);
mTimeLeftInMillis = prefs.getLong("millisLeft", START_TIME_IN_MILLIS);
mTimerRunning = prefs.getBoolean("timerRunning", false);
updateCountDownText();
updateButtons();
if (mTimerRunning) {
mEndTime = prefs.getLong("endTime", 0);
mTimeLeftInMillis = mEndTime - System.currentTimeMillis();
if (mTimeLeftInMillis < 0) {
mTimeLeftInMillis = 0;
mTimerRunning = false;
updateCountDownText();
updateButtons();
} else {
startTimer();
}
}
}
public void callNotification(){
Notification notification = new NotificationCompat.Builder(getApplicationContext(), CHANNEL_1_ID)
.setSmallIcon(R.drawable.ic_money)
.setContentTitle("Test 1")
.setContentText("Important Message")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setCategory(NotificationCompat.CATEGORY_MESSAGE)
.build();
notificationManager.notify(1, notification);
}
}

Continue countdown timer after pause

I have a countdown timer, I have a button that pause it, but I need that when you click on button, continue to countdown. I search but couldn't a function related this. How can do it? This is my code, I only managed to restart it, but not continue:
private TextView cuentaRegresiva;
private Button btnEmpezar;
private CountDownTimer countDownTimer;
private boolean timerHasStarted = false;
private long startTime = 30 * 1000;
private final long interval = 1 * 1000;
private long restante;
#Override
protected void onCreate(Bundle savedInstanceState) {
...
btnEmpezar.setOnClickListener(iniciar);
}
OnClickListener iniciar=new OnClickListener() {
#Override
public void onClick(View arg0) {
if (!timerHasStarted && !pausado) {
countDownTimer.start();
timerHasStarted = true;
btnEmpezar.setText("Pause");
pausado=false;
}
else if(timerHasStarted && !pausado){
countDownTimer.cancel();
timerHasStarted = false;
btnEmpezar.setText("Restart");
pausado=true;
}
else if(!timerHasStarted && pausado){
countDownTimer2.start();
timerHasStarted = true;
btnEmpezar.setText("Pause");
pausado=false;
}
}
};
public class MyCountDownTimer extends CountDownTimer {
public MyCountDownTimer(long startTime, long interval) {
super(startTime, interval);
}
#Override
public void onFinish() {
cuentaRegresiva.setText("Tiempo!");
}
#Override
public void onTick(long millisUntilFinished) {
cuentaRegresiva.setText("" + millisUntilFinished / 1000);
}
}
public class MyCountDownTimer2 extends CountDownTimer {
public MyCountDownTimer2(long restante, long interval) {
super(restante, interval);
}
#Override
public void onFinish() {
cuentaRegresiva.setText("Tiempo!");
}
#Override
public void onTick(long millisUntilFinished) {
cuentaRegresiva.setText("" + millisUntilFinished / 1000);
}
}
I thought about taking millisUntilFinished to a variable, but didn't work. Anyway I guess the way is close to that.

You can try saving the seconds until finish, and then you can start the new countdown timer with that seconds.
// -----------------------
Cuando presionas el boton de pausa, guarda los segundos que le faltan al timer para que termine. Entonces, cuando volves a apretar play, creas un nuevo CountDownTimer con esos segundos que te faltaban.
UPDATE
I did an example:
public class MainActivity extends Activity {
private static final int TIMER_TIME = 10000; // in millis
private Button btnCountdown;
private TextView tvTimeUntilFinish;
private boolean mIsPaused = true;
private long mMillisUntilFinish;
private CountDownTimer mTimer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mMillisUntilFinish = TIMER_TIME;
btnCountdown = (Button) findViewById(R.id.btnCountdown);
tvTimeUntilFinish = (TextView) findViewById(R.id.tvTimeUntilFinish);
btnCountdown.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
if (mIsPaused) {
btnCountdown.setText("Pause");
initTimer();
} else {
btnCountdown.setText("Play");
cancelTimer();
}
mIsPaused = !mIsPaused;
}
});
}
private void cancelTimer() {
if (mTimer != null) {
mTimer.cancel();
mTimer = null;
}
}
private void initTimer() {
mTimer = new CountDownTimer(mMillisUntilFinish, 1000) {
public void onTick(long millisUntilFinished) {
tvTimeUntilFinish.setText("seconds remaining: " + millisUntilFinished / 1000);
mMillisUntilFinish = millisUntilFinished;
}
public void onFinish() {
}
}.start();
}
}