Develop Reference

Pause thread on CountDownTimer in Android

I have four balls on the screen red , blue , green , yellow which has two states ON , OFF. Initially all of them are in OFF state.My requirement is that I have a string suppose "RBYGRBYG" and for every letter i want to change the state of the corresponding ball one by one (R->RED,B->BLUE,Y->YELLOW,G->GREEN) for 0.5 seconds. But my code for playString("RBYGRBYG"); changes the state of all balls simultaneously at once for 0.5 seconds instead of changing it one by one.
private void playString(String str) {
for(int i=0;i<str.length();i++)
{
if(str.charAt(i)=='R')
{
red.setImageResource(R.drawable.red_on);
new CountDownTimer(500,100){
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
red.setImageResource(R.drawable.red_off);
}
}.start();
}
if(str.charAt(i)=='B')
{
blue.setImageResource(R.drawable.blue_on);
new CountDownTimer(500,100){
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
blue.setImageResource(R.drawable.blue_off);
}
}.start();
}
if(str.charAt(i)=='G')
{
green.setImageResource(R.drawable.green_on);
new CountDownTimer(500,100){
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
green.setImageResource(R.drawable.green_off);
}
}.start();
}
if(str.charAt(i)=='Y')
{
yellow.setImageResource(R.drawable.yellow_on);
new CountDownTimer(500,100){
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
yellow.setImageResource(R.drawable.yellow_off);
}
}.start();
}
}
}

Try this :
private int i= 0; // class field
private void playString(String str) {
i++;
if (i == str.length())
i = 0;
if(str.charAt(i)=='R')
// the rest of the code the same removing one "}" at the end

Let's see if I got it right:
-for each letter on your string, you want to change the state of the ball(coresponding with the char in string).
Maybe try with a while instead of for, and you will increment i++ only in the function onFinish() this way it will get to the next color only if previous one has stopped.
EDIT Hope this helps :
private void playString(String str){
while (i < str.length()){
if(str.charAt(i)=='R'){
red.setImageResource(R.drawable.red_on);
new CountDownTimer(500,100){
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
red.setImageResource(R.drawable.red_off);
i+=1;
}
}.start();
}
}
}

How to stop the CountDownTimer?

where should I edit this code, that i can stop the CountDown ?
How to delete the old one before I start the next new CountDown ?
public void MyCounter1(){
new CountDownTimer(60000, 1000) {
public void onTick(long millisUntilFinished) {
txt_timer.setText("Left time : " + millisUntilFinished / 1000);
}
public void onFinish() {
txt_timer.setText("done");
}
}.start();
}

here is code:
CountDownTimer timer= null;
public void MyCounter1(){
timer =new CountDownTimer(60000, 1000) {
public void onTick(long millisUntilFinished) {
txt_timer.setText("Left time : " + millisUntilFinished / 1000);
}
public void onFinish() {
txt_timer.setText("done");
}
};
timer.start();
}
// To stop & start new timer check not null of timer instance first then cancel existing timer & start new one
if(timer != null){
timer.cancel();
MyCounter1();
}
also if you want to cancel first instance and start new one you can add above lines in onFinish method which will be get called when timer finish his time.
check this:
CountDownTimer timer= null;
public void MyCounter1(){
timer =new CountDownTimer(60000, 1000) {
public void onTick(long millisUntilFinished) {
txt_timer.setText("Left time : " + millisUntilFinished / 1000);
}
public void onFinish() {
txt_timer.setText("done");
if(timer != null){
timer.cancel();
MyCounter1();
}
}
};
timer.start();
}

I did these 2 lines. I works at the time fine:
public void MyCounter1(){
CountDownTimer countDownTimer = new CountDownTimer(60000, 1000) {
public void onTick(long millisUntilFinished) {
if(my_condition=1){ //1- just make my_condition<>1 to stop the counter
txt_timer.setText("Left time : " + millisUntilFinished / 1000); }
}
public void onFinish() {
countDownTimer.cacel(); // 2- delete old one
txt_timer.setText("done");
}
}.start();
}

private int time = 10; //example 10 min.
CountDownTimer(60000 * time, 1000)
#Override
public void onFinish() {
txt_timer.setText("done");
cancel();
time = 0;

How to use CountDownTimer in my android application?

I'm writing a android application. I have a CountDownTimer in between my application and i want until the timer to zero, all my app run(user must be select the true Button) and when become zero and the user did'nt anything, the other action performed (the user loses).
this is CountDownTimer :
new CountDownTimer(5000, 1000) {
public void onTick(long millisUntilFinished) {
a.setText("" + millisUntilFinished / 1000);
/*while (millisUntilFinished / 1000 != 1) {
}*/
}
public void onFinish() {
a.setText("done!");
}
}.start();
and this is part of code:
if ((randomAndroidColor1 == rainbow[0]) {
findViewById(ans).setBackgroundColor(rainbow2[0]);
findViewById(ans).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
c3.setBackgroundColor(rainbow1[2]);
}
});
}
How to access to millisUntilFinished variable in above if condition?
Timer and if condition worked correctly but I want to combine them.

If I understood correctly , you can use an instance boolean variable.
boolean isWon = false;
private void countDown() {
isWon=false; // Reset every method call.
// Set listener once in method.
findViewById(R.id.answer).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
isWon=true;
}
});
new CountDownTimer(5000, 1000) {
public void onTick(long millisUntilFinished) {
// onTick works.
}
public void onFinish() {
if(isWon){
// Won
}else{
// Lose
}
}
}.start();
}

android - handler don't work in loop [duplicate]

I try to do app which show elements. Each element should start showing when the before element was hidden. Each element is showing 2 seconds.
Code:
public void gameStart()
{
do
{
data = random.nextInt(6) + 1;
if (data == 1)
{
CountDownTimer cdt = new CountDownTimer(2000, 1000)
{
#Override
public void onTick(long millisUntilFinished)
{
element1.setVisibility(View.VISIBLE);
}
#Override
public void onFinish()
{
element1.setVisibility(View.GONE);
}
}.start();
{
CountDownTimer cdt = new CountDownTimer(2000, 1000)
{
#Override
public void onTick(long millisUntilFinished)
{
element2.setVisibility(View.VISIBLE);
}
#Override
public void onFinish()
{
element2.setVisibility(View.GONE);
}
}.start();
} else if (data == 3)
{
CountDownTimer cdt = new CountDownTimer(2000, 1000)
{
#Override
public void onTick(long millisUntilFinished)
{
element3.setVisibility(View.VISIBLE);
}
#Override
public void onFinish()
{
element3.setVisibility(View.GONE);
}
}.start();
} else if (data == 4)
{
CountDownTimer cdt = new CountDownTimer(2000, 1000)
{
#Override
public void onTick(long millisUntilFinished)
{
element4.setVisibility(View.VISIBLE);
}
#Override
public void onFinish()
{
element4.setVisibility(View.GONE);
}
}.start();
} else if (data == 5)
{
CountDownTimer cdt = new CountDownTimer(2000, 1000)
{
#Override
public void onTick(long millisUntilFinished)
{
element5.setVisibility(View.VISIBLE);
}
#Override
public void onFinish()
{
element5.setVisibility(View.GONE);
}
}.start();
} else if (data == 6)
{
CountDownTimer cdt = new CountDownTimer(2000, 1000)
{
#Override
public void onTick(long millisUntilFinished)
{
element6.setVisibility(View.VISIBLE);
}
#Override
public void onFinish()
{
element6.setVisibility(View.GONE);
}
}.start();
}
id = id + 1;
text.setText("cos " + id);
} while (id < 3);
All elements are being shown in the same time. And I try add
Thread.sleep(2500);
But this stoped the action in window. I try add this after code:
Timer timer = new Timer();
timer.schedule( new TimerTask() {
public void run() {
}
}, 0, 60*1000);
But loop wasn't stay. I try do it with notify() and wait(), but it also don't work.
Don't suggest me to do do next action in onFinish() because this must be repeat a lot.
Anybody have another idea?
EDIT
I also use Handler but it don't work

I would recommend you not to implement this code in the main thread.
Create an async task, which hides a button and on postExequte calls itself.

CountDownTimer issue

Basically my aim is to have this timer reset whenever the user presses button b. I've tried a few methods such as if( i==true && bIsPressed()) but no luck, any ideas?
//2 buttons
Button =b;
TextView = time;
//countdown code
CountDownTimer Count = new CountDownTimer(11000, 1000) {
public void onTick(long millisUntilFinished) {
time.setText(""+millisUntilFinished / 1000);
}
public void onFinish() {
time.setText("Finished");
}
}; Count.start();

Haven't tested it, but I would do something along the lines of:
private void setupTimerResetButton()
{
mTimerResetButton.setOnClickListener(new OnClickListener(){
public void onClick(){
resetTimer();
}
});
}
private void resetTimer()
{
if(mTimer != null){
mTimer.cancel();
mTimer = null;
}
mTimer = new CountDownTimer(11000, 1000) {
public void onTick(long millisUntilFinished) {
mTimerTextView.setText(""+millisUntilFinished / 1000);
}
public void onFinish() {
mTimerTextView.setText("Finished");
}
};
mTimer.start();
}