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Not Allowing Multiple Button Presses

I'm building a camera app with Camera2 API, relatively new to Android development. Everything is working just working out the bugs. But I have a switch camera button, going from the front camera to the back or vise-versa. If the user continuosly presses the button, the app will crash. Trying to set it up in a way that it finishes everything it needs to do before the button can be used again.
I have the button set to enabled, but after press, it disables the button until everyting finishes, then renables, but that doesn't seem to work:
//The button to switch the camera to front and back camera.
mChangeCamera = (ImageButton) findViewById(R.id.change_camera);
mChangeCamera.setEnabled(true);
mChangeCamera.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mChangeCamera.setEnabled(false);
closeCamera();
// stopBackgroundthread();
if (mTextureView.isAvailable()) {
setUpCamera(mTextureView.getWidth(), mTextureView.getHeight());
transformImage(mTextureView.getWidth(), mTextureView.getHeight());
connectCamera();
} else {
mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
}
mChangeCamera.setEnabled(true);
}
});
there has to be a simple way to do this, but not finding anyting from searchs. Anyone know how I can set it up not to crash when the user smashes the button?

Alight, so I ended up figuring out how to do this. You can use a handler with a post delay like so:
mChangeCamera = (ImageButton) findViewById(R.id.change_camera);
mChangeCamera.setEnabled(true);
mChangeCamera.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mChangeCamera.setEnabled(false);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
mChangeCamera.setEnabled(true);
}
},1000);
closeCamera();
// stopBackgroundthread();
if (mTextureView.isAvailable()) {
setUpCamera(mTextureView.getWidth(), mTextureView.getHeight());
transformImage(mTextureView.getWidth(), mTextureView.getHeight());
connectCamera();
} else {
mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
}
}
});

i did this by calculate time between multiple button presses...
create global variable in your class first
private long mLastClickTime = 0;
and a final int for duration between clicks
public static final int CLICK_TIME = 400;
then paste this code in on click of button
if (SystemClock.elapsedRealtime() - mLastClickTime < CLICK_TIME) {
return; //button pressed repeatedly so do nothing
}
mLastClickTime = SystemClock.elapsedRealtime();
// button is not pressed repeatedly so add your desired action
and of course you can increase the CLICK_TIME value if error still occurs

How to start a thread if a button is idle?

I need a thread to start after 3 seconds of a button being idle, is there a simple way of doing it?
I'm building a counter app, the button triggers two counters, the total counter and the "tapping counter", the tapping counter helps keep track of the actual change of values, showing how many taps the user did, I need it to vanish after some seconds so the user can tap again.

for stuffs like that I usually use a Handler with a Runnable in order to do stuff after X milliseconds the user isn't doing a specific action.
First, create a runnable and a handler
final android.os.Handler handler = new android.os.Handler();
private Runnable runnable;
private final long DELAY = 3000; // how many milliseconds you want to wait
Then add the onClickListener:
myButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
}
});
Then, inside onClick event, remove callbacks and istantiate the handler again as follows:
if(runnable != null) {
// in this case the user already clicked once at least
handler.removeCallbacks(runnable);
}
runnable = new Runnable() {
#Override
public void run() {
//this code will run when user isn't clicking for the time you set before.
}
};
handler.postDelayed(runnable, DELAY);
Final result:
final android.os.Handler handler = new android.os.Handler();
private Runnable runnable;
private final long DELAY = 3000; // how many milliseconds you want to wait
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// all your previous stuffs
myButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(runnable != null) {
// in this case the user already clicked once at least
handler.removeCallbacks(runnable);
}
runnable = new Runnable() {
#Override
public void run() {
//this code will run when user isn't clicking for the time you set before.
}
};
handler.postDelayed(runnable, DELAY);
}
});
}
I hope this helps, for any question feel free to ask

Handler may work in this scenario, with a 3000 milisecond delay.
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
// do action
}
}, 3000);

At first, you create a Timer with a TimerTask(with your Thread) and schedule it to run after 3 seconds.
Every time the button is pressed, you reset the timer.
public class MyClass{
private Timer timer=new Timer()
private TimerTask task=new TimerTask(){
public void run(){
//your action
}
};
public void init(){
timer.schedule(task,3000);
}
public void onButtonClick(){
task.cancel();
timer.schedule(task,3000);
}
}

how to set different onclicklisteners on same button click?

I am implementing a timer in android with one text view and one button for start/stop.
How do I set register different events on clicklistener of the same button, such that when it is clicked the first time it will start a timer and when clicked a second time it will stop the timer and report the time between events?
I am implementing a timer in android with one text view and one button for start/stop.
How do I set register different events on clicklistener of the same button, such that when it is clicked the first time it will start a timer and when clicked a second time it will stop the timer and report the time between events?
Edit1
what i did is,
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_depth);
findViewById(R.id.btn).setOnClickListener(this);
}
boolean showingFirst = true;
public void generate(View view){
if(showingFirst){
long startTime = System.currentTimeMillis();
showingFirst = false;
}else{
long difference = System.currentTimeMillis() - startTime;
showingFirst = true;
TextView myText = (TextView)findViewById(R.id.tv);
myText.setText(String.valueOf(difference));
}
}
but since long starttime is started in if when the control enters else loop it shows
cannot resolve symbol 'startTime'
please help and special thanks to eliamyro

You can do it using a global boolean isStart and start or stop the timer depending on the value of the isStart.
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (isStart) {
// Stop timer
isStart = false;
} else {
// Start timer
isStart = true;
}
}
});

try this,
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(btn.getText().toString().equals("Start")){
btn.setText("Stop");
// start timer
}else{
btn.setText("Start");
// stop timer
}
}
});

on click (start/stop) button start the timer according to your code and return a value to button and when you click again that flag value can be used to create a if condition for stop as well as start

As you are starting and stopping a Timer with your button you can just check if the timer is running or not. I would suggest extending a TimerTask for that use case (I took that code from here):
public class YourTimerTask extends TimerTask {
private boolean isRunning = false;
#Overrides
public void run() {
this.isRunning = true;
//rest of run logic here...
}
public boolean isRunning() {
return this.isRunning;
}
}
Then in your onClickListener you can just check if your timer is running or not:
startStopBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (yourTimer.isRunning()) {
stopTimer();
} else {
startTimer();
}
}
});

Android stop loop by click button

i am trying to make a button that when its clicked , it changes its color image and starts a countdowntimer in a method activeDelay() as here:
piscaAutoButton = (Button) rootView.findViewById(R.id.piscaAutoButton);
piscaAutoButton.setOnClickListener(new Button.OnClickListener() {
#Override
public void onClick(final View view) {
if (sessionManager.getPisca()) {
sessionManager.setPisca(false);
trigger = false;
piscaAutoButton.setBackgroundResource(R.drawable.button_bg_round);
} else {
sessionManager.setPisca(true);
piscaAutoButton.setBackgroundResource(R.drawable.button_add_round);
trigger = true;
activeDelay(trigger);
}
here is my activeDelay method:
private boolean activeDelay(boolean trigger) {
while (trigger) { // LOOP WHILE BUTTON IS TRUE CLICKED
int timerDelay = manualControl.getDelayPisca(); //input for timer
//delay manual
new CountDownTimer(timerDelay * 1000, 1000) {
public void onFinish() {
System.out.println("sent");
try {
System.out.println("blink button " + manualControl.getBlinkButton());
if (!manualControl.getBlinkButton().isEmpty()) {
MenuActivity.mOut.write(manualControl.getBlinkButton().getBytes());
}
} catch (IOException e) {
e.printStackTrace();
}
}
public void onTick(long millisUntilFinished) {
}
}.start();
}
return trigger;
}
My problem is that i need the counter keeps going after finished, stopping just when the user clicks again in the button (trigger = false). I am having problems to program that, if someone could help,i know the return inside activeDelay ejects from the method, how can we solve that ,tks

I would suggest you to don't use CountDownTimer(this runs for some specific time period) , instead of this you should use Handler(this run infinitely) . i am sending you handler code.
private Handler handler = new Handler();
//call this when you want to start the timer .
handler.postDelayed(runnable, startTime);
Runnable runnable = new Runnable() {
#Override
public void run() {
// Do here , whatever you want to do(show updated time e.t.c.) .
handler.postDelayed(this, xyz); //xyz is time interval(in your case it is 1000)
}
};
//Stop handler when you want(In your case , when user click the button)
handler.removeCallbacks(runnable);

How to make timer stop on click

My timer will stop when it reaches a certain number. Instead, I want it to stop on a button click. How do I do that?
This is what my code looks like currently:
final TextView t1 = (TextView) findViewById(R.id.yourpay);
final Timer t =new Timer();
t.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
money = (PPS+Reserve);
Reserve = (money);
t1.setText("$" + money); //Place your text data here
counter++;
//Place your stopping condition over here. Its important to have a stopping condition or it will go in an infinite loop.
if(counter == HPDPS)
t.cancel();
}
});
}
}, 1000, 1000);
If possible I would like it to stop on button click AND when counter reaches HPDPS.

Put in your button's onClickListener():
if (t != null)
t.cancel();
and remove the stopping condition from the timer.
Code Example (updated):
final TextView t1 = (TextView) findViewById(R.id.yourpay);
final Timer t =new Timer();
t.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
money = (PPS+Reserve);
Reserve = (money);
t1.setText("$" + money); //Place your text data here
// Removed the stopping condition/counter
}
});
}
}, 1000, 1000); // Do you really want to wait 1 second before executing the timer's code? If not, change the 1st "1000" to a "0"
final Button b = (Button) findViewById(R.id.my_button_id); // Replace with your button's id
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (t != null)
t.cancel();
}
});

Use a CountDownTimer. When the button is clicked just stop the timer.
But for what you have just go ahead and create a button, set an OnClickListener on the button and then call timer.cancel() or whatever stops it inside on the onClick() method of your listener.