I want to make a timer which will be shown on every activity of my application.
I know how to make a timer on an activity below is my code
public class Timer extends Activity implements OnClickListener {
public TextView mTextField;
private Button btnstart;
public String formatTime(long millis) {
String output = "00:00";
long seconds = millis / 1000;
long minutes = seconds / 60;
seconds = seconds % 60;
minutes = minutes % 60;
String secondsD = String.valueOf(seconds);
String minutesD = String.valueOf(minutes);
if (seconds < 10)
secondsD = "0" + seconds;
if (minutes < 10)
minutesD = "0" + minutes;
output = minutesD + " : " + secondsD;
return output;
}
public CountDownTimer Counter1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Declare Start/Stop button
btnstart = (Button)findViewById(R.id.btnThread1);
btnstart.setOnClickListener(this);
//Button btnstop = (Button)findViewById(R.id.button02);
//Button btnpass = (Button)findViewById(R.id.button03);
//Declare Text fields to show time left
final TextView mCounter1TextField=(TextView)findViewById(R.id.txtThread1);
final TextView mCounter2TextField = (TextView)findViewById(R.id.txtThread2);
//final TextView mCounter3TextField=(TextView)findViewById(R.id.textView03);
//Counter 1
Counter1 = new CountDownTimer(120000 , 1000) {
public void onTick(long millisUntilFinished) {
mCounter1TextField.setText("Seconds left: " + formatTime(millisUntilFinished));
}
public void onFinish() {
mCounter1TextField.setText("Finished!");
// Counter1.start();
}
};
}
@Override
public void onClick(View v) {
if(v == btnstart)
{
Counter1.start();
}
}
}
I want to know how to make it global??
You can have a singleton class holding your CountDownTimer
// This is not a real singleton, Google to get a proper Java implementation
public class TimerSingleton {
// Should not be public, you should of course encapsulate access to that timer.
// static keyword says that one timer object is shared by all instance of TimerSingleton
public static CountDownTimer timer = new CountDownTimer();
}
// Access to the timer from an activity:
TimerSingleton.timer.start();
Second option is to have your timer as a member of a custom Application class: Use Application class for global variables
Third option : make a local service that starts the timer when started.
Keep in mind that in case of options 1 and 2, if the OS decides to kill you app, the timer will vanish (i.e. when the activity is re-created, the CountDownTimer object will be resetted).
Create a Singleton! http://en.wikipedia.org/wiki/Singleton_pattern
singleton guarantee that there will be only one object of some kind and makes it easy for any other object to access it.
If you want to show it one every activity of your application, then I suggest you to use Fragments. All you need to do is to create a Fragment with your Timer class that will appear every time, another Fragment with other content you want to show, and manipulate the lifecycle of the second Fragment only.
I have solved my problem by making a timer in one activity and calling its protected function in my other activity.
This is the startTimer function to start the timer:
private void startTimer(){
if (mTimer == null) {
mTimer = new Timer();
}
if (mTimerTask == null) {
mTimerTask = new TimerTask() {
@Override
public void run() {
Log.i(TAG, "count: "+String.valueOf(count));
sendMessage(UPDATE_TEXTVIEW);
do {
try {
Log.i(TAG, "sleep(1000)...");
Thread.sleep(1000);
} catch (InterruptedException e) {
}
} while (isPause);
count ++;
}
};
}
if(mTimer != null && mTimerTask != null )
mTimer.schedule(mTimerTask, delay, period);
}
and this is the public function which can be used by any other activity:
public String valueOfTimer()
{
return String.valueOf(count);
}
and this is how I am getting the value on other activity:
private void updateTime()
{
TimerActivity tm = new TimerActivity();
String time = tm.valueOfTimer();
t2.setText(time);
System.out.println("Time::"+time);
}
make a singleton class and register listener in your ui.
mTimerCustom = CountdownTimer.getInstance();
mTimerCustom.registerListener(this);
mTimerCustom.start();
in CountDownTimer class
public static CountdownTimer getInstance()
{
return INSTANCE;
}
public synchronized void start() {
Calendar cal=Calendar.getInstance();
int seconds=cal.get(Calendar.SECOND);
start=60-seconds;
//Toast.makeText(mParentActivity,""+seconds,Toast.LENGTH_LONG).show();
if (D) Log.d(TAG, "start");
switch (state) {
case STOPPED:
count = start;
case PAUSED:
timer = new Timer(TAG);
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
if (count > 0) {
count--;
Log.d(TAG, "Tick: " + count);
for (TimerListener listener : listeners) {
listener.timerUpdate(count);
}
}
else stop();
}
}, 0, DELAY);
state = COUNTING;
if (D) Log.d(TAG, "state: counting");
break;
case COUNTING:
break;
default:
throw new IllegalStateException(state.toString());
}
}
