How to stop two runables with one button?

How to stop two runables with one button? - java

I am having an issure trying to stop both of my runnables with one stop button, i can stop just one of the two just fine but as soon as i try to stop both my app freezes when the button is pressed on my phone, here is my code so far:
if(go != 1){
go = 1;
final Timer t =new Timer();
t.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
if(DHPDPS==0){
money = (DPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
}else if(counter > DHPDPS && DOTPPS != 0 && DHPDPS != 0){
money = (DOTPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
} else{
money = (DPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
}
//Place your stopping condition over here. Its important to have a stopping condition or it will go in an infinite loop.
counter++;
// Display pay per second
if(counter <= DHPDPS || DHPDPS == 0){
t2.setText("Your pay per second is: $"+result);
}else{
t2.setText("Your pay per second is: $"+result2);
}
}
});
}
}, 20, 20);
// Make countdown to overtime display
final TextView count = (TextView) findViewById(R.id.countdown);
countdown = (int)HPDPS;
cd.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run(){
int hours = (countdown/3600);
if(OTPPS != 0 && HPDPS != 0){
count.setText("Seconds Remaining to Overtime: " + countdown + "\nAbout " + hours + " Hours");
countdown--;
}
}
});
}
}, 1000, 1000);
final Button b = (Button) findViewById(R.id.clockout);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(go == 1)
go = 0;
if (t != null)
t.cancel();
// if (cd != null) // This condition Freezes my phone when activated?
// cd.cancel();
}
});
}
}
Any help would be greatly appreciated! thanks.

public void run() {
while(running) {
//your code for both runnables
}
}
final Button b = (Button) findViewById(R.id.clockout);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(running) {
running = false;
}
}
});
With this code, your runnables will check if they should be running each loop, and if not, they will exit their run() and the thread will stop.

I have figured out what the problem was, it turned out to be a really simple fix,
Here is my original code byte:
final Button b = (Button) findViewById(R.id.clockout);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(go == 1)
go = 0;
if (t != null)
t.cancel();
// if (cd != null) // This condition Freezes my phone when activated?
// cd.cancel();
}
Here is what i did to fix the problem:
final Button b = (Button) findViewById(R.id.clockout);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(go == 1)
go = 0;
if (t != null){
t.cancel();
cd.cancel();
}
}
It was extremely simple, just something i looked over i guess, Thanks for everyones help!

1. Create a boolean variable which will be set to true in the beginning...
2. Use this variable in both the runnables like ... while (isOk)
3. On the click of the button, make this boolean variable as false, and both the runnnable
will cease to exists...

Related

How to calculate reaction time?

I have developed an app that has two buttons (left and right) and a Textview that will pop up on the screen.Each button has it's corresponding word.
The user has to click the button that corresponds to TextView's word as quickly as possible when it shows. I want to calculate it's reaction time on clicking the button.
Below is my code.
public class Place_to_go_1 extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_place_to_go_1);
placeone = Global_variables.getFirst_choice_label();
placetwo = Global_variables.getSecond_choice_label();
p_one = (TextView)findViewById(R.id.p_one);
p_two = (TextView)findViewById(R.id.p_two);
btnleft = (ImageButton)findViewById(R.id.btnleft);
btnright = (ImageButton)findViewById(R.id.btnright);
next = (ImageButton)findViewById(R.id.Next);
lblmaintext = (TextView)findViewById(R.id.lblmaintext);
lblprompt = (TextView)findViewById(R.id.lblprompt);
lblreact = (TextView)findViewById(R.id.lblreact);
imgmain = (ImageView)findViewById(R.id.imgmain);
//prac = (ImageView) findViewById(R.id.prac);
Intent intent = getIntent();
final String randomId = intent.getStringExtra("Info_id");
//============ validate image if not empty
setImage_onLaunch();
//==== populate left and right choices===
populate_headers(placeone, placetwo);
//==== populate attributes=====
populate_attributes();
//============== instruction ======
setInstruction();
//=============media
wrong_press = MediaPlayer.create(this, R.raw.wrong_press);
react_fast = MediaPlayer.create(this, R.raw.react_faster);
//=== left button click trigger
btnleft.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String position = "H";
if (tanan[counter].equals(p_one.getText().toString())) {
lblprompt.setVisibility(View.INVISIBLE);
HashMap<String,String> queryValues = new HashMap<String, String>();
queryValues.put("Info_id",randomId);
queryValues.put("Choice",p_one.getText().toString());
queryValues.put("Reaction_time",String.valueOf(elapsedTime));
queryValues.put("Position",position);
queryValues.put("Main",main);
queryValues.put("Error",error);
mydb.insertTest(queryValues);
counter++;
if (counter < tanan.length) {
btnleft.setEnabled(false);
btnright.setEnabled(false);
timeStamp = System.currentTimeMillis();
//Toast.makeText(Place_to_go_1.this, ""+timeStamp, Toast.LENGTH_SHORT).show();
getreactionTime(p_one.getText().toString(), String.valueOf((((timeStamp) / 1000.0) - ((timeRun) / 1000.0))));
setIntervalTime();
} else {
//======end sa data
postEnd();
}
} else {
// Toast.makeText(Place_to_go_1.this, "Wrong pressed", Toast.LENGTH_SHORT).show();
//wrong_press.start();
wrong_click_audio();
error = "1";
lblprompt.setVisibility(View.VISIBLE);
}
}
});
//==== right button click trigger
btnright.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String position = "A";
if (tanan[counter].equals(p_two.getText().toString())) {
lblprompt.setVisibility(View.INVISIBLE);
HashMap<String,String> queryValues = new HashMap<String, String>();
queryValues.put("Info_id",randomId);
queryValues.put("Choice",p_two.getText().toString());
queryValues.put("Reaction_time", String.valueOf(elapsedTime));
queryValues.put("Position",position);
queryValues.put("Main",main);
queryValues.put("Error",error);
mydb.insertTest(queryValues);
counter++;
if (counter < tanan.length) {
btnleft.setEnabled(false);
btnright.setEnabled(false);
timeStamp = System.currentTimeMillis();
//Toast.makeText(Place_to_go_1.this, ""+timeStamp, Toast.LENGTH_SHORT).show();
getreactionTime(p_two.getText().toString(), String.valueOf((((timeStamp) / 1000.0) - ((timeRun) / 1000.0))));
setIntervalTime();
} else {
//======end sa data
postEnd();
}
} else {
// Toast.makeText(Place_to_go_1.this, "Wrong pressed", Toast.LENGTH_SHORT).show();
// wrong_press.start();
wrong_click_audio();
error = "1";
lblprompt.setVisibility(View.VISIBLE);
}
}
});
// ==== next button for the next activity (Place to go 2)
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = getIntent();
String randomId = intent.getStringExtra("Info_id");
//============= launch activity 2 for place to go
if (instruct == true) {
next.setVisibility(View.INVISIBLE);
// prac.setVisibility(View.VISIBLE);
CountDownTimer();
} else {
//Toast.makeText(getApplication(),"Saved Successfully.",Toast.LENGTH_SHORT).show();
Intent i = new Intent(getApplicationContext(), Place_to_go_2.class);
i.putExtra("Info_id", randomId);
startActivity(i);
}
}
});
}
public void interval(){
if(counter < tanan.length){
lblmaintext.setVisibility(View.VISIBLE);
timeRun = System.currentTimeMillis();
btnleft.setEnabled(true);
btnright.setEnabled(true);
lblmaintext.setText(tanan[counter]);
setImage();
imgmain.setVisibility(View.VISIBLE);
react = true;
reacFaster();
}else{
//======end sa data
Toast.makeText(Place_to_go_1.this, "End data", Toast.LENGTH_SHORT).show();
lblmaintext.setVisibility(View.VISIBLE);
lblmaintext.setText("Ok for now");
}
}
public void setIntervalTime(){
react = false;
lblreact.setVisibility(View.INVISIBLE);
reactFaster_timer.cancel();
lblmaintext.setVisibility(View.INVISIBLE);
lblreact.setVisibility(View.INVISIBLE);
imgmain.setVisibility(View.INVISIBLE);
timer = new CountDownTimer(Global_variables.interval_time_before_choices_will_show,Global_variables.interval_time_before_choices_will_show) {
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
interval();
}
}.start();
}
int counter_countdown = 0;
int drawwable_amber = R.drawable.amber;
String arr[] = {"Ready...","Set...","Start."};
public void CountDownTimer(){
btnleft.setVisibility(View.INVISIBLE);
btnright.setVisibility(View.INVISIBLE);
lblmaintext.setBackgroundResource(0);
timer = new CountDownTimer(4000,1000) {
#Override
public void onTick(long millisUntilFinished) {
lblmaintext.setTextSize(35);
lblmaintext.setText(arr[counter_countdown]);
counter_countdown++;
}
#Override
public void onFinish() {
btnleft.setVisibility(View.VISIBLE);
btnright.setVisibility(View.VISIBLE);
lblmaintext.setBackgroundResource(drawwable_amber);
// lblmaintext.setText(tanan[counter]);
//setImage();
val_first_launch();
timeRun = System.currentTimeMillis();
react = true;
reacFaster();
}
}.start();
}
public void reacFaster(){
reactFaster_timer = new CountDownTimer(Global_variables.reaction_time_first_param,Global_variables.reaction_time_second_param) {
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
if(react == true){
//Toast.makeText(Place_to_go_1.this, "please react faster", Toast.LENGTH_SHORT).show();
react_fast.start();
lblreact.setVisibility(View.VISIBLE);
}
}
}.start();
}
public void populate_headers(String one,String two){
//== this methos sets headers as random==//
headers = new ArrayList<String>();
headers.add(one);
headers.add(two);
Collections.shuffle(headers);
p_one.setText(headers.get(0));
p_two.setText(headers.get(1));
}
public void populate_attributes(){
attributes = new ArrayList<String>();
for(int h =0;h < 5;h++){
attributes.add(placeone);
attributes.add(placetwo);
}
Collections.shuffle(attributes);
tanan = new String[attributes.size()];
for(int k = 0; k < tanan.length;k++ ){
tanan[k] = attributes.get(k);
}
}
public void postEnd(){
instruct = false;
lblprompt.setVisibility(View.INVISIBLE);
btnright.setVisibility(View.INVISIBLE);
btnleft.setVisibility(View.INVISIBLE);
next.setVisibility(View.VISIBLE);
lblmaintext.setBackgroundResource(0);
lblmaintext.setTextSize(20);
p_one.setVisibility(View.INVISIBLE);
p_two.setVisibility(View.INVISIBLE);
imgmain.setVisibility(View.INVISIBLE);
reactFaster_timer.cancel();
lblreact.setVisibility(View.INVISIBLE);
lblmaintext.setText("Well done!\nNext, is the main task. It is exactly the same as before but this time words will appear on the screen that might distract you. \nPlease respond as quickly as you can.\n Press Next to begin");
}
//=========== validate if image is enabled/ disble if not set
public void setImage_onLaunch(){
if(Global_variables.getFirst_choice_image().equals("") || Global_variables.getSecond_choice_image().equals("")){
disbaleImage();
}else{
}
}
public void setImage(){
/* if(tanan[counter].equals(p_one.getText().toString())){
imgmain.setImageBitmap(BitmapFactory.decodeFile(Global_variables.getFirst_choice_image()));
}else{
imgmain.setImageBitmap(BitmapFactory.decodeFile(Global_variables.getSecond_choice_image()));
}*/
if(placeone.equals(tanan[counter])){
imgmain.setImageBitmap(BitmapFactory.decodeFile(Global_variables.getFirst_choice_image()));
}else{
imgmain.setImageBitmap(BitmapFactory.decodeFile(Global_variables.getSecond_choice_image()));
}
}
public void val_first_launch(){
if(Global_variables.getFirst_choice_image().equals("") || Global_variables.getSecond_choice_image().equals("")){
lblmaintext.setVisibility(View.VISIBLE);
lblmaintext.setText(tanan[counter]);
}else{
imgmain.setVisibility(View.VISIBLE);
if(placeone.equals(tanan[counter])){
imgmain.setImageBitmap(BitmapFactory.decodeFile(Global_variables.getFirst_choice_image()));
}else{
imgmain.setImageBitmap(BitmapFactory.decodeFile(Global_variables.getSecond_choice_image()));
}
}
}
public void disbaleImage(){
imgmain.setBackgroundResource(0);
imgmain.setVisibility(View.GONE);
}
#Override
public void onBackPressed() {
super.onBackPressed();
startActivity(new Intent(getApplication(), MainActivity.class));
finish();
}
public String getreactionTime(String domain, String time){
// Toast.makeText(Place_to_go_1.this, time, Toast.LENGTH_SHORT).show();
//== get reaction time to every activity
Global_variables.set_timeStamps(domain, time);
return domain;
}
//===== prompt instruction====
public void setInstruction(){
btnleft.setVisibility(View.INVISIBLE);
btnright.setVisibility(View.INVISIBLE);
lblmaintext.setBackgroundResource(0);
lblmaintext.setTextSize(20);
lblmaintext.setText("Instruction:\n\nIf " + p_one.getText().toString() + " appears, press arrow left.\n If " + p_two.getText().toString() +
" appears, press arrow right.\n\nRespond as quickly as you can.");
next.setVisibility(View.VISIBLE);
}
//===== prompt instruction====
public void wrong_click_audio(){
wrong_press.start();
}
//=============end class====================
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Checks the orientation of the screen
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
// Toast.makeText(this, "landscape", Toast.LENGTH_SHORT).show();
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
//Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
}
}
}

Here a simple logic to calculate reaction time is to create a variable which hold a time when a question is popped up to user and the time when a user show a click reaction to question and calculate the time difference between these two action.
long timeWhenQuestionShowed = System.currentTimeMillis();
long timeWhenUserReacted = System.currentTimeMillis();
long reactionTime = timeWhenQuestionShowed - timeWhenUserReacted;

This should help:
Try using onTouch instead of onClick.
long timeBefor=0;
long timeReaction=0;
btnleft.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: // when pressed
timeBefore=System.currentTimeMillis();
break;
case MotionEvent.ACTION_UP: // when released
timeReaction=System.currentTimeMillis() - timeBefore; // calculate difference
break;
}
}
timeReaction is your desired value.

The idea is to calculate the difference between 2 points in time. I will write 2 examples of calculating time difference in Java / measuring reaction time in Java:
System.nanoTime() or System.currentTimeMillis()
Differences are discussed here: Time measuring overhead in Java
long endTimeNanoSec = 0;
long startTimeNanoSec = System.nanoTime();
myWorkThatNeedsTiming(); // wait for user button press here
endTimeNanoSec = System.nanoTime();
long totalWorkTimeNanos = endTimeNanoSec - startTimeNanoSec;
Java StopWatch
JavaDoc: StopWatch
Stopwatch stopwatch = Stopwatch.createStarted();
myWorkThatNeedsTiming(); // wait for user button press here
stopwatch.stop();
long totalWorkTimeMillis = stopwatch.elapsedMillis();

Why aren't my timers stopping when button is clicked?

It was working fine when it was just one timer but when I added inserted a switch and added two more timers, the stop timer button seized working. All the code is pasted below:
public class timer extends Activity implements OnClickListener {
private Button buttonStartTime, buttonStopTime, buttonStartTime2, buttonStopTime2, buttonStartTime3, buttonStopTime3;
private EditText edtTimerValue, edtTimerValue2, edtTimerValue3;
private TextView textViewShowTime, textViewShowTime2, textViewShowTime3; // will show the time
private CountDownTimer countDownTimer, countDownTimer2, countDownTimer3; // built in android class
// CountDownTimer
private long totalTimeCountInMilliseconds, totalTimeCountInMilliseconds2, totalTimeCountInMilliseconds3; // total count down time in
// milliseconds
private long timeBlinkInMilliseconds, timeBlinkInMilliseconds2, timeBlinkInMilliseconds3; // start time of start blinking
private boolean blink, blink2, blink3; // controls the blinking .. on and off
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_timer);
buttonStartTime = (Button) findViewById(R.id.btnStartTime);
buttonStopTime = (Button) findViewById(R.id.btnStopTime);
textViewShowTime = (TextView) findViewById(R.id.tvTimeCount);
edtTimerValue = (EditText) findViewById(R.id.edtTimerValue);
buttonStartTime2 = (Button) findViewById(R.id.btnStartTime2);
buttonStopTime2 = (Button) findViewById(R.id.btnStopTime2);
textViewShowTime2 = (TextView) findViewById(R.id.tvTimeCount2);
edtTimerValue2 = (EditText) findViewById(R.id.edtTimerValue2);
buttonStartTime3 = (Button) findViewById(R.id.btnStartTime3);
buttonStopTime3 = (Button) findViewById(R.id.btnStopTime3);
textViewShowTime3 = (TextView) findViewById(R.id.tvTimeCount3);
edtTimerValue3 = (EditText) findViewById(R.id.edtTimerValue3);
buttonStartTime.setOnClickListener(this);
buttonStopTime.setOnClickListener(this);
buttonStartTime2.setOnClickListener(this);
buttonStopTime2.setOnClickListener(this);
buttonStartTime3.setOnClickListener(this);
buttonStopTime3.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnStartTime:
if (v.getId() == R.id.btnStartTime) {
textViewShowTime.setTextAppearance(getApplicationContext(),
R.style.normalText);
setTimer();
buttonStopTime.setVisibility(View.VISIBLE);
buttonStartTime.setVisibility(View.GONE);
edtTimerValue.setVisibility(View.GONE);
edtTimerValue.setText("");
startTimer();
} else if (v.getId() == R.id.btnStopTime) {
countDownTimer.cancel();
buttonStartTime.setVisibility(View.VISIBLE);
buttonStopTime.setVisibility(View.GONE);
edtTimerValue.setVisibility(View.VISIBLE);
}
break;
case R.id.btnStartTime2:
if (v.getId() == R.id.btnStartTime2) {
textViewShowTime2.setTextAppearance(getApplicationContext(),
R.style.normalText);
setTimer2();
buttonStopTime2.setVisibility(View.VISIBLE);
buttonStartTime2.setVisibility(View.GONE);
edtTimerValue2.setVisibility(View.GONE);
edtTimerValue2.setText("");
startTimer2();
} else if (v.getId() == R.id.btnStopTime2) {
countDownTimer2.cancel();
buttonStartTime2.setVisibility(View.VISIBLE);
buttonStopTime2.setVisibility(View.GONE);
edtTimerValue2.setVisibility(View.VISIBLE);
}
break;
case R.id.btnStartTime3:
if (v.getId() == R.id.btnStartTime3) {
textViewShowTime3.setTextAppearance(getApplicationContext(),
R.style.normalText);
setTimer3();
buttonStopTime3.setVisibility(View.VISIBLE);
buttonStartTime3.setVisibility(View.GONE);
edtTimerValue3.setVisibility(View.GONE);
edtTimerValue3.setText("");
startTimer3();
} else if (v.getId() == R.id.btnStopTime) {
countDownTimer3.cancel();
buttonStartTime3.setVisibility(View.VISIBLE);
buttonStopTime3.setVisibility(View.GONE);
edtTimerValue3.setVisibility(View.VISIBLE);
}
break;
}
}
private void setTimer() {
int time = 0;
if (!edtTimerValue.getText().toString().equals("")) {
time = Integer.parseInt(edtTimerValue.getText().toString());
} else
Toast.makeText(timer.this, "Please Enter Minutes...",
Toast.LENGTH_LONG).show();
totalTimeCountInMilliseconds = 60 * time * 1000;
timeBlinkInMilliseconds = 30 * 1000;
}
private void startTimer() {
countDownTimer = new CountDownTimer(totalTimeCountInMilliseconds, 500) {
// 500 means, onTick function will be called at every 500
// milliseconds
#Override
public void onTick(long leftTimeInMilliseconds) {
long seconds = leftTimeInMilliseconds / 1000;
if (leftTimeInMilliseconds < timeBlinkInMilliseconds) {
textViewShowTime.setTextAppearance(getApplicationContext(),
R.style.blinkText);
// change the style of the textview .. giving a red
// alert style
if (blink) {
textViewShowTime.setVisibility(View.VISIBLE);
// if blink is true, textview will be visible
} else {
textViewShowTime.setVisibility(View.INVISIBLE);
}
blink = !blink; // toggle the value of blink
}
textViewShowTime.setText(String.format("%02d", seconds / 60)
+ ":" + String.format("%02d", seconds % 60));
// format the textview to show the easily readable format
}
#Override
public void onFinish() {
// this function will be called when the timecount is finished
textViewShowTime.setText("Time up!");
textViewShowTime.setVisibility(View.VISIBLE);
buttonStartTime.setVisibility(View.VISIBLE);
buttonStopTime.setVisibility(View.GONE);
edtTimerValue.setVisibility(View.VISIBLE);
}
}.start();
}
private void setTimer2() {
int time = 0;
if (!edtTimerValue2.getText().toString().equals("")) {
time = Integer.parseInt(edtTimerValue2.getText().toString());
} else
Toast.makeText(timer.this, "Please Enter Minutes...",
Toast.LENGTH_LONG).show();
totalTimeCountInMilliseconds2 = 60 * time * 1000;
timeBlinkInMilliseconds2 = 30 * 1000;
}
private void startTimer2() {
countDownTimer2 = new CountDownTimer(totalTimeCountInMilliseconds2, 500) {
// 500 means, onTick function will be called at every 500
// milliseconds
#Override
public void onTick(long leftTimeInMilliseconds) {
long seconds = leftTimeInMilliseconds / 1000;
if (leftTimeInMilliseconds < timeBlinkInMilliseconds2) {
textViewShowTime2.setTextAppearance(getApplicationContext(),
R.style.blinkText);
// change the style of the textview .. giving a red
// alert style
if (blink2) {
textViewShowTime2.setVisibility(View.VISIBLE);
// if blink is true, textview will be visible
} else {
textViewShowTime2.setVisibility(View.INVISIBLE);
}
blink2 = !blink; // toggle the value of blink
}
textViewShowTime2.setText(String.format("%02d", seconds / 60)
+ ":" + String.format("%02d", seconds % 60));
// format the textview to show the easily readable format
}
#Override
public void onFinish() {
// this function will be called when the timecount is finished
textViewShowTime2.setText("Time up!");
textViewShowTime2.setVisibility(View.VISIBLE);
buttonStartTime2.setVisibility(View.VISIBLE);
buttonStopTime2.setVisibility(View.GONE);
edtTimerValue2.setVisibility(View.VISIBLE);
}
}.start();
}
private void setTimer3() {
int time = 0;
if (!edtTimerValue3.getText().toString().equals("")) {
time = Integer.parseInt(edtTimerValue3.getText().toString());
} else
Toast.makeText(timer.this, "Please Enter Minutes...",
Toast.LENGTH_LONG).show();
totalTimeCountInMilliseconds3 = 60 * time * 1000;
timeBlinkInMilliseconds3 = 30 * 1000;
}
private void startTimer3() {
countDownTimer3 = new CountDownTimer(totalTimeCountInMilliseconds3, 500) {
// 500 means, onTick function will be called at every 500
// milliseconds
#Override
public void onTick(long leftTimeInMilliseconds3) {
long seconds = leftTimeInMilliseconds3 / 1000;
if (leftTimeInMilliseconds3 < timeBlinkInMilliseconds3) {
textViewShowTime3.setTextAppearance(getApplicationContext(),
R.style.blinkText);
// change the style of the textview .. giving a red
// alert style
if (blink3) {
textViewShowTime3.setVisibility(View.VISIBLE);
// if blink is true, textview will be visible
} else {
textViewShowTime3.setVisibility(View.INVISIBLE);
}
blink3 = !blink; // toggle the value of blink
}
textViewShowTime3.setText(String.format("%02d", seconds / 60)
+ ":" + String.format("%02d", seconds % 60));
// format the textview to show the easily readable format
}
#Override
public void onFinish() {
// this function will be called when the timecount is finished
textViewShowTime3.setText("Time up!");
textViewShowTime3.setVisibility(View.VISIBLE);
buttonStartTime3.setVisibility(View.VISIBLE);
buttonStopTime3.setVisibility(View.GONE);
edtTimerValue3.setVisibility(View.VISIBLE);
}
}.start();
}
}

You need to switch on stopping buttons as well.
switch (v.getId()) {
case R.id.btnStartTime:
means v.getId() == R.id.btnStartTime inside this case so checking the value of v.getId() there is useless. The first if (v.getId() == R.id.btnStartTime) will always be true, the second one (v.getId() == R.id.btnStopTime) always false.

Getting value from 3 Textviews and converting to int for Countdown Timer

Currently I have three textviews which I am using for the countdown timer in my android app in HH:MM:SS. (hours, minutes and seconds). I am allowing the user to set the textviews to a specific number for the time. I am then trying to get the value from the textviews by converting to int and then using the integer values as the seconds for the countdown timer. But the problem is that there is no values for the ints, and therefore the timer cannot start.
As the user drags around the scrubber he can change the textview value for hours, minutes, or seconds:
Here is the code for that below in my onCreate method:
#Override
public void onProgressChanged(SeekArc seekArc, int progress,
boolean fromUser) {
int progress_count = 0;
for (int i=0;i<24;i=i+1)
{
if (progress ==120) {
mSeekArcProgress.setText("24");
}
else if (progress == progress_count)
{
mSeekArcProgress.setText(String.valueOf(String.format("%02d",i)));
}
progress_count = progress_count + 5;
}
}
});
} else if (v.getId() == R.id.minutetext) {
//corresponding button logic should below here
mSeekArc.setOnSeekArcChangeListener(new SeekArc.OnSeekArcChangeListener() {
#Override
public void onStopTrackingTouch(SeekArc seekArc) {
}
#Override
public void onStartTrackingTouch(SeekArc seekArc) {
}
//This sets the actual string for the minutes
#Override
public void onProgressChanged(SeekArc seekArc, int progress,
boolean fromUser) {
int progress_count = 0;
for (int i=0;i<120;i++)
{
if (progress ==120) {
mSeekArcMinuteProgress.setText("00");
}
else if (progress == progress_count)
{
mSeekArcMinuteProgress.setText(String.valueOf(String.format("%02d",i)));
}
progress_count = progress_count + 2;
}
}
});
} else if (v.getId() == R.id.secondtext) {
//corresponding button logic should below here
mSeekArc.setOnSeekArcChangeListener(new SeekArc.OnSeekArcChangeListener() {
#Override
public void onStopTrackingTouch(SeekArc seekArc) {
}
#Override
public void onStartTrackingTouch(SeekArc seekArc) {
}
//This sets the actual string for the seconds
#Override
public void onProgressChanged(SeekArc seekArc, int progress,
boolean fromUser) {
// so ur setting it to HALF of what "progress" is = to
int progress_count = 0;
for (int i=0;i<60;i++)
{
if (progress ==120) {
mSeekArcSecondProgress.setText("00");
}
else if (progress == progress_count)
{
mSeekArcSecondProgress.setText(String.valueOf(String.format("%02d",i)));
}
progress_count = progress_count + 2;
}
}
});
}
The TextView ID's are referenced in the following code which is in my setActionListener method for the countdown timer:
private void setActionListeners() {
// IT IS RIGHT BELOW CHECK IT OUT.
number_text = (TextView) findViewById(R.id.hour_progress_number);
minute_text = (TextView) findViewById(R.id.minute_progress_number);
second_text = (TextView) findViewById(R.id.second_progress_number);
hourint = Integer.valueOf(number_text.getText().toString());
minuteint = Integer.valueOf(minute_text.getText().toString());
secondint = Integer.valueOf(second_text.getText().toString());
totalTimeCountInMilliseconds = ((hourint*60*60) +(minuteint*60) + (secondint)) * 1000; // time count for 3 minutes = 180 seconds
timeBlinkInMilliseconds = totalTimeCountInMilliseconds/1000;
start_timer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// textViewShowTime.setTextAppearance(getApplicationContext(), R.style.normalText);
countDownTimer = new CountDownTimer(totalTimeCountInMilliseconds, 500) {
// 500 means, onTick function will be called at every 500 milliseconds
#Override
public void onTick(long leftTimeInMilliseconds) {
long seconds = leftTimeInMilliseconds / 1000;
mSeekArc.setVisibility(View.INVISIBLE);
if ( leftTimeInMilliseconds < timeBlinkInMilliseconds ) {
// textViewShowTime.setTextAppearance(getApplicationContext(), R.style.blinkText);
// change the style of the textview .. giving a red alert style
if ( blink ) {
number_text.setVisibility(View.VISIBLE);
minute_text.setVisibility(View.VISIBLE);
second_text.setVisibility(View.VISIBLE);
// if blink is true, textview will be visible
} else {
number_text.setVisibility(View.INVISIBLE);
minute_text.setVisibility(View.INVISIBLE);
second_text.setVisibility(View.INVISIBLE);
}
blink = !blink; // toggle the value of blink
}
second_text.setText(String.format("%02d", seconds % 60));
minute_text.setText(String.format("%02d", seconds / 60));
number_text.setText(String.format("%02d", seconds / 3600)); // format the textview to show the easily readable format
}
#Override
public void onFinish() {
// this function will be called when the timecount is finished
//textViewShowTime.setText("Time up!");
number_text.setVisibility(View.VISIBLE);
minute_text.setVisibility(View.VISIBLE);
second_text.setVisibility(View.VISIBLE);
mSeekArc.setVisibility(View.VISIBLE);
}
}.start();
}
});
}
The timer works went I put an explicit integer value for totalTimeCountInMilliseconds; however, when I use hourint, minuteint, and secondint the value is probably zero because the timer doesn't start and that seems like that is the only valid reason.
I am not sure what to do the fix this so I can get integer values and make the timer work.
EDIT: Pastebin for full code link: http://pastebin.com/1wcXHdvX

You can use
Log.i("YourActivity","Seconds: " + secondsint);
to check, what are the values you get from textviews.
Dont forget to add imports. You can use Ctrl+Shift+O and select the Android Logcat import.
EDIT1:
I looked you code and you are calling setActionListeners() in your OnCreateMethod(). That does not make sense! setActionListeners() get the values from the TextViews from the user. But User cant enter values when system initializes the activity. So, call your setActionListeners() here:
start_timer.setOnClickListener(new View.OnClickListener() {
setActionListeners();
#Override
public void onClick(View view) {
...
}
...
}
And move the start_timer.setOnClickListener(new View.OnClickListener(){...})
to onCreateMethod()

UI not updating in Android using AsyncTask

I've searched the internet far and wide about getting the UI to update in real-time in Android to no avail. I implemented an AysncTask class as most of the other posts suggested, but it's still not updating my UI in real-time like I want. It only updates after the program is done running. I've even been getting the "Skipped n frames. The application may be doing too much work in its main thread." error, which I don't understand because I'm trying to do these updates in the UI thread. About 5 seconds into running my program the screen turns black and stays like that until its done finishing. Any help would be much appreciated as I've been pulling my hair out on this one for awhile Here's my code.
EDIT: Solved. Removed the Thread.sleep(n) from my UI thread and added it to my AsyncTask. Thanks everyone!
Main class:
public class Home extends Activity {
// Declare objects
Button turingB, socratesB, voltaireB, descartesB, platoB;
int[] eating, thinking, hungry;
Philosopher socrates, turing, voltaire, descartes, plato;
Philosopher[] philosophers;
Chopstick[] chopsticks;
TextView info;
String value;
Context context;
int toastLength;
boolean turingHungry, socratesHungry, voltaireHungry, descartesHungry, platoHungry;
String running;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
// Instantiate objects (keep track of each button individually
context = getApplicationContext();
toastLength = Toast.LENGTH_SHORT;
info = (TextView) findViewById(R.id.textView1);
info.setText("Click Start to begin!");
socratesB = (Button) findViewById(R.id.button1);
descartesB = (Button) findViewById(R.id.button5);
platoB = (Button) findViewById(R.id.button4);
voltaireB = (Button) findViewById(R.id.button3);
turingB = (Button) findViewById(R.id.button2);
running = "false";
// Set all philosophers to thinking (blue)
// socratesB.setBackgroundColor(Color.BLUE);
// descartesB.setBackgroundColor(Color.BLUE);
// platoB.setBackgroundColor(Color.BLUE);
// voltaireB.setBackgroundColor(Color.BLUE);
// turingB.setBackgroundColor(Color.BLUE);
turingHungry = false;
socratesHungry = false;
voltaireHungry = false;
descartesHungry = false;
platoHungry = false;
//Button platoTempButton = (Button) findViewById(R.id.button4);
// Listen for buttons
OnClickListener pBtn = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
platoHungry = true;
}
};
//platoTempButton.setOnClickListener(pBtn);
OnClickListener tBtn = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
turingHungry = true;
}
};
OnClickListener sBtn = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
socratesHungry = true;
}
};
OnClickListener vBtn = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
voltaireHungry = true;
}
};
OnClickListener dBtn = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
descartesHungry = true;
}
};
platoB.setOnClickListener(pBtn);
turingB.setOnClickListener(tBtn);
socratesB.setOnClickListener(sBtn);
voltaireB.setOnClickListener(vBtn);
descartesB.setOnClickListener(dBtn);
// Set arrays to count time spent eating, thinking, hungry
eating = new int[5];
thinking = new int[5];
hungry = new int[5];
// Create the chopsticks
chopsticks = new Chopstick[5];
for (int i = 0; i < 5; i ++)
{
chopsticks[i] = new Chopstick(i);
}
for (Chopstick chop: chopsticks)
{
chop.available = true;
}
// Create the philosophers
philosophers = new Philosopher[5];
philosophers[0] = new Philosopher(0, chopsticks[0], chopsticks[1], "Plato", platoB);
philosophers[1] = new Philosopher(1, chopsticks[1], chopsticks[2], "Turing", turingB);
philosophers[2] = new Philosopher(2, chopsticks[2], chopsticks[3], "Socrates", socratesB);
philosophers[3] = new Philosopher(3, chopsticks[3], chopsticks[4], "Voltaire", voltaireB);
philosophers[4] = new Philosopher(4, chopsticks[4], chopsticks[0], "Descartes", descartesB);
// Get sim time from user
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Simulation Time");
alert.setMessage("Please length of time for the simulation to run (in seconds)");
final EditText input = new EditText(this);
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
value = String.valueOf(input.getText());
}
});
alert.show();
// Get info
Bundle extras = getIntent().getExtras();
if (extras != null)
{
running = extras.getString("runApp");
value = extras.getString("numToRun");
}
// Run app
if (running.equals("true"))
{
System.out.println("RUNNING!!!");
run(value);
}
}
public void run(String length)
{
int num = Integer.parseInt(length);
// Run num times
for (int i = 0; i < num; i++)
{
try {
// Pass current index, and data arrays to step method
step(i, eating, thinking, hungry);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
// Print out some data
for (int j = 0; j < 5; j++)
{
System.out.println("Philosopher " + j + " ate: " + eating[j]);
System.out.println("Philosopher " + j + " thought: " + thinking[j]);
System.out.println("Philosopher " + j + " was hungry: " + hungry[j]);
}
running = "false";
}
// Run simulation n times (n specified by the user)
public void startSim(View v)
{
Intent my_intent = new Intent(this, Home.class);
my_intent.putExtra("runApp", "true");
my_intent.putExtra("numToRun", value);
startActivity(my_intent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home, menu);
return true;
}
// Reset simulation
public void reset(View v)
{
Intent my_intent = new Intent(this, Home.class);
startActivity(my_intent);
}
// Return hunger status of philosopher
public boolean isHungry(String name) {
if (name.equals("Voltaire"))
return voltaireHungry;
else if (name.equals("Socrates"))
return socratesHungry;
else if (name.equals("Plato"))
return platoHungry;
else if (name.equals("Turing"))
return turingHungry;
else if (name.equals("Descartes"))
return descartesHungry;
else
return false;
}
// Step method for simulation
// Takes the current index and each of the data arrays
public void step(int i, int[] eating, int[] thinking, int[] hungry) throws InterruptedException
{
// Make random number
Random randomGenerator = new Random();
int num = randomGenerator.nextInt(10);
// Randomly set a philosopher isFull to false (hungry) (10% chance for each to become hungry if not specified by the user)
if (isHungry(philosophers[0].name))
philosophers[0].isFull = false;
if (num == 1 || isHungry(philosophers[1].name))
philosophers[1].isFull = false;
if (num == 2 || isHungry(philosophers[2].name))
philosophers[2].isFull = false;
if (num == 3 || isHungry(philosophers[3].name))
philosophers[3].isFull = false;
if (num == 4 || isHungry(philosophers[4].name))
philosophers[4].isFull = false;
// For each philosopher
for (Philosopher phil: philosophers)
{
// Print current info
System.out.println("PHIL: " + phil.name + " NUM: " + num + " RIGHT: " + phil.rightChopstick.available + " LEFT: " + phil.leftChopstick.available);
// Temp id var
int tempId = phil.id;
// If philosopher is hungry, try to eat
if (phil.isFull == false)
{
// Try to eat only if both chopsticks are available
if (phil.rightChopstick.pickUp(phil.name) && phil.leftChopstick.pickUp(phil.name))
{
// Change button color
new Background(phil.button).execute((long) 1);
//Toast.makeText(context, phil.name + " is eating.", toastLength).show();
// Increment time spent eating
eating[tempId]++;
}
// Check to see if the philosopher is already eating (has both chopsticks)
else if (phil.rightChopstick.who.equals(phil.name) && phil.leftChopstick.who.equals(phil.name))
{
//Toast.makeText(context, phil.name + " is eating.", toastLength).show();
new Background(phil.button).execute((long) 1);
// Increment eating
eating[tempId]++;
// 30% chance to stop eating
if (num >= 5 && num <=7)
{
// Put down chopsticks
phil.rightChopstick.putDown();
phil.leftChopstick.putDown();
// Stop eating
phil.isFull = true;
}
}
// Hungry
else
{
// Change button color
new Background(phil.button).execute((long) 3);
//Toast.makeText(context, phil.name + " is hungry.", toastLength).show();
// Increment time spent hungry
hungry[tempId]++;
}
}
// Thinking
else
{
new Background(phil.button).execute((long) 2);
//Toast.makeText(context, phil.name + " is thinking.", toastLength).show();
// Increment time spent thinking
thinking[tempId]++;
}
Thread.sleep(1000);
}
// Make each step count as 1 second (1000 miliseconds)
System.out.println("--------------------------------------------------------------");
Thread.sleep(5000);
}
}
Background class (AsyncTask):
public class Background extends AsyncTask<Long, Void, Void>
{
// Variables
String color;
Button button;
public Background(Button button)
{
this.button = button;
}
#Override
protected Void doInBackground(Long... params) {
// Get which color the button needs to be
try
{
// Change the color based on the value passed in
if (params[0] == 3)
{
color = "RED";
}
else if (params[0] == 2)
{
color = "BLUE";
}
else if (params[0] == 1)
{
color = "GREEN";
}
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
// Set button to that color
System.out.println("Updating color in real time...");
button.setBackgroundColor(Color.parseColor(color));
}
#Override
protected void onPreExecute() {
}
#Override
protected void onProgressUpdate(Void... values) {
}
}

Here is one problem
Thread.sleep(1000);
and here is another
Thread.sleep(5000);
these are both making the UI sleep for a total of 6 seconds. You almost never want to call sleep() on the UI Thread. You can do this in doInBackground() or anywhere else that runs on a background Thread.
Edit
You don't set your Listeners. For example:
platoB.setOnClickListener(new pBtn());

Progress can be set with publishProgress in your asynctask, you get a call to onProgressUpdate in the UI thread.

Timer not stopping after activity has been closed and restarted

I have a runnable timer that update a textview every second, when the activity is onStop (or called into the background) the timer continues to run. The issue i am having is that when i re-launch the activity it starts the same timer again, so the numbers are going up twice as fast as they should. I have it coded so that it will kill both timers before it restarts them but i believe that when the activity is started again the timers are not being killed. Here is an example of my code :
t.cancel();
cd.cancel();
t = new Timer();
t.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
That is only a small part but it should kill the timer (t.cancel();) then start a new one, this only happens when the activity is stopped and then restarted. please help this issue is driving me absolutely insane.
=========================================================
For the brave souls willing to read alot, here is my entire activity that i am having the issue with:
public class PayTracker extends Activity {
private static double Reserve;
private static int Reserve1;
public static double money;
public static double counter;
private static int go;
private static int countdown;
public static int convert;
public static double HW;
public static double OTW;
public static double HPD;
public static double DPPS;
public Timer t = new Timer();
public Timer cd = new Timer();
public static String mcountdown = "Time till overtime";
public static String mmoney = "total cash";
public static String mcounter = "ticks";
public static String mReserve = "building total";
public static String mReserve1 = "building total 2";
public static String mHW;
public static String mOTW;
public static String mHPD;
public static String mDPPS;
public static String mgo;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pay_tracker);
getActionBar().setDisplayHomeAsUpEnabled(true);
// Receive messages from options page
double pHW, pOTW, pHPD;
Intent intent = getIntent();
pHW = intent.getDoubleExtra(Options.MESSAGE_HW, 0);
pOTW = intent.getDoubleExtra(Options.MESSAGE_OTW, 0);
pHPD = intent.getDoubleExtra(Options.MESSAGE_HPD, 0);
if(pHW != 0){
HW = pHW;
OTW = pOTW;
HPD = pHPD;
}
// Color buttons
Button buttonc = (Button) findViewById(R.id.clockin);
buttonc.getBackground().setColorFilter(0xFF00FF00, PorterDuff.Mode.MULTIPLY);
Button buttond = (Button) findViewById(R.id.clockout);
buttond.getBackground().setColorFilter(0xFFFF0000, PorterDuff.Mode.MULTIPLY);
// go = 0;
// Calculate pay per second
final double PPS = (HW/3600);
DPPS = (PPS/50);
final double OTPPS = (OTW/3600);
final double DOTPPS = (OTPPS/50);
final double HPDPS = (HPD*3600);
final double DHPDPS = (HPDPS*50);
// Display
final TextView t1 = (TextView) findViewById(R.id.yourpay);
t1.setTextColor(Color.parseColor("#008000"));
final TextView t2 = (TextView) this.findViewById(R.id.payper);
final String result2 = String.format("%.8f", OTPPS);
final String result = String.format("%.8f", PPS);
// if(go != 1){
// go = 1;
// if(go == 1){
t.cancel();
cd.cancel();
// go = 0;
// }
// if(go == 0){
// go = 1;
t = new Timer();
t.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
if(DHPDPS==0){
money = (DPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
}else if(counter > DHPDPS && DOTPPS != 0 && DHPDPS != 0){
money = (DOTPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
} else{
money = (DPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
}
counter++;
//if(counter == 3000)
// t.cancel();
// Display pay per second
if(counter <= DHPDPS || DHPDPS == 0){
t2.setText("Your pay per second is: $"+result);
}else{
t2.setText("Your pay per second is: $"+result2);
}
}
});
}
}, 20, 20);
// Make countdown to overtime display
final Intent intent1 = new Intent(this, PayTracker.class);
// Create the notification
final Notification notification = new Notification(R.drawable.ic_launcher, "Click here to check your pay!", System.currentTimeMillis());
// Create an Intent for the notification to launch
// Create a PendingIntent for the associated Intent
final PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent1, 0);
cd = new Timer();
final TextView count = (TextView) findViewById(R.id.countdown);
convert = (int)HPDPS;
cd.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run(){
countdown = (convert - Reserve1);
int hours = (countdown/3600);
if(OTPPS != 0 && HPDPS != 0){
count.setText("Seconds Remaining to Overtime: " + countdown + "\nAbout " + hours + " Hours");
Reserve1++;
}
// Set the notification's details
final String end = String.format("%.6f", money);
notification.setLatestEventInfo(getApplicationContext(), "Your Current Pay:", "$"+end, pendingIntent);
// Submit the notification to the system
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).notify(0, notification);
}
});
}
}, 1000, 1000);
// }
// }
final Button b = (Button) findViewById(R.id.clockout);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(go == 1)
go = 0;
if (t != null){
t.cancel();
cd.cancel();
}
}
});
}
public void onRestoreInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can restore the view hierarchy
super.onRestoreInstanceState(savedInstanceState);
// Restore value of members from saved state
countdown = savedInstanceState.getInt(mcountdown);
Reserve = savedInstanceState.getInt(mReserve);
money = savedInstanceState.getInt(mmoney);
counter = savedInstanceState.getInt(mcounter);
Reserve1 = savedInstanceState.getInt(mReserve1);
HW = savedInstanceState.getInt(mHW);
OTW = savedInstanceState.getInt(mOTW);
HPD = savedInstanceState.getInt(mHPD);
DPPS = savedInstanceState.getInt(mDPPS);
go = savedInstanceState.getInt(mgo);
}
#Override
public void onStart(){
super.onStart();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_pay_tracker, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
public void sendMessage(View view) {
// Calculate pay per second
final double PPS = (HW/3600);
DPPS = (PPS/50);
final double OTPPS = (OTW/3600);
final double DOTPPS = (OTPPS/50);
final double HPDPS = (HPD*3600);
final double DHPDPS = (HPDPS*50);
// Display
final TextView t1 = (TextView) findViewById(R.id.yourpay);
t1.setTextColor(Color.parseColor("#008000"));
final TextView t2 = (TextView) this.findViewById(R.id.payper);
final String result2 = String.format("%.8f", OTPPS);
final String result = String.format("%.8f", PPS);
//if(go != 1){
// go = 1;
t.cancel();
cd.cancel();
t = new Timer();
t.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
if(DHPDPS==0){
money = (DPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
}else if(counter > DHPDPS && DOTPPS != 0 && DHPDPS != 0){
money = (DOTPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
} else{
money = (DPPS+Reserve);
Reserve = (money);
String end = String.format("%1f", money);
t1.setText("$" + end);
}
counter++;
if(counter == 3000)
t.cancel();
// Display pay per second
if(counter <= DHPDPS || DHPDPS == 0){
t2.setText("Your pay per second is: $"+result);
}else{
t2.setText("Your pay per second is: $"+result2);
}
}
});
}
}, 20, 20);
// Make countdown to overtime display
final Intent intent1 = new Intent(this, PayTracker.class);
// Create the notification
final Notification notification = new Notification(R.drawable.ic_launcher, "Click here to check your pay!", System.currentTimeMillis());
// Create an Intent for the notification to launch
// Create a PendingIntent for the associated Intent
final PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent1, 0);
cd = new Timer();
final TextView count = (TextView) findViewById(R.id.countdown);
convert = (int)HPDPS;
cd.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run(){
countdown = (convert - Reserve1);
int hours = (countdown/3600);
if(OTPPS != 0 && HPDPS != 0){
count.setText("Seconds Remaining to Overtime: " + countdown + "\nAbout " + hours + " Hours");
Reserve1++;
}
// Set the notification's details
final String end = String.format("%.6f", money);
notification.setLatestEventInfo(getApplicationContext(), "Your Current Pay:", "$"+end, pendingIntent);
// Submit the notification to the system
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).notify(0, notification);
}
});
}
}, 1000, 1000);
//}
}
#Override
public void onSaveInstanceState(Bundle savedInstanceState) {
// Save the user's current game state
savedInstanceState.putInt(mcountdown, countdown);
savedInstanceState.putDouble(mReserve, Reserve);
savedInstanceState.putDouble(mmoney, money);
savedInstanceState.putDouble(mcounter, counter);
savedInstanceState.putDouble(mReserve1, Reserve1);
savedInstanceState.putDouble(mHW, HW);
savedInstanceState.putDouble(mOTW, OTW);
savedInstanceState.putDouble(mHPD, HPD);
savedInstanceState.putDouble(mDPPS, DPPS);
savedInstanceState.putInt(mgo, go);
// Always call the superclass so it can save the view hierarchy state
super.onSaveInstanceState(savedInstanceState);
}
#Override
public void onDestroy() {
super.onDestroy();
if(t != null)
t.cancel();
if(cd != null)
cd.cancel();
}
}

This is one way to get around that.
static Timer mTimer = null;
onCreate() {
if (mTimer == null)
mTimer = new Timer();
} else {
// You shouldn't have to do nothing because your timer should be running
}
}
Note that there are several issues in general here. The static is basically saying just to create one instance of that object. As a side effect it also tries to reclaim the same memory address. Either way, once your app is in the background it can be cleaned up by the system at any time so your not guaranteed to get your Timer back. There are a bunch of other ways to get around that, but that is out of scope for this question.

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