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How to call a method after a delay in Android
(35 answers)
Closed 5 years ago.
This is a curiosity question but is there a way to delay the final line in an if statement.
eg:
if(m_Toolbar.getVisibility() == View.VISBILE) {
...........
m_Toolbar.setVisibility(View.GONE);
}
How would you go about delaying the final line like (ie.GONE)?
Please DO NOT use Thread.Sleep() that will freeze the UI Use a Handler
Handler h = new Handler();
h.postDelayed(new Runnable() {
#Override
public void run() {
}
},delayMilliseconds);
Thread.sleep will cause UI to freeze , I suggest to use Handler instead
if(m_Toolbar.getVisibility() == View.VISBILE) {
...........
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
m_Toolbar.setVisibility(View.GONE);
}
}, 3000);//3 seconds
}
You can use the following TimeUnit.SECONDS.sleep(1); which waits for one second.
if(m_Toolbar.getVisibility() == View.VISBILE) {
int Delay = 5; //set Your request delay
new Thread(new Runnable(){
public void run() {
// TODO Auto-generated method stub
do{
try {
runOnUiThread(new Runnable() {
public void run() {
Delay --;
if( Delay == 0){
m_Toolbar.setVisibility(View.GONE);
}
}
});
Thread.sleep(1000);
} catch (InterruptedException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
}while(Delay > 0);
}
}).start();
}
Related
i'm trying to make a delay inside while loop using Thread.sleep() method . here is my code :
new Thread(new Runnable() {
#Override
public void run() {
z=0;
while (z<45){
z++;
handler.post(new Runnable() {
#Override
public void run() {
time.setText(Integer.toString(45-z));
}
});
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
this code was working and suddenly a problem occurred . it started to make a delay less than one minute , sumtimes 500 ms and sumtimes less than that
Instead if using a different thread, Thread.sleep(), Handler and while loop you can try only with Handler like this,
private int timerCount = 0;
private static Handler myHandler = new Handler();
private void runVVRunnable() {
myHandler.postDelayed(runnable, 1000);
}
private Runnable runnable = new Runnable() {
#Override
public void run() {
timerCount++;
if ((time == null)) {
return;
}
if (timerCount <= 45) {
time.setText(Integer.toString(timerCount));
runVVRunnable();
}
}
};
#Override
protected void onDestroy() {
super.onDestroy();
myHandler.removeCallbacks(runnable);
}
you can just call runVVRunnable() it will do the same process which you are doing while loop
Just a guess but when sleeping/waiting on Java thread you need to try-catch InterruptedException.
This exception is thrown when "someone" calls interrupt() on your thread.
This will cause the thread to wake up from sleep early than expected.
Check if you catch InterruptedException before your thread terminated.
How can I implement a timer in Java 8? I prefer one simple method for this. I want to do something every 15 min or 30 min. Any idea?
you can use
Thread.sleep(milliseconds)
call the function you want and put it inside Runnable .
Example :
new Thread(new Runnable() {
#Override
public void run() {
try {
Thread.sleep(3000); // 3
} catch (InterruptedException e) {
e.printStackTrace();
}
runOnUiThread(new Runnable() {
#Override
public void run() {
//your Function
}
});
}
}).start();
OR
Thread t = new Thread(new Runnable() {
public void run() {
// stuff here
}});
t.start();
I have the following code:
int x=0;
private void startTimerThread() {
System.out.println("enter");
System.out.println("percentage"+percentage);
System.out.println("x"+x);
final Handler handler = new Handler();
Runnable runnable = new Runnable() {
public void run() {
for (x = 0; x>= percentage; x++ ) {
try {
Thread.sleep(1000);
}
catch (InterruptedException e) {
e.printStackTrace();
}
handler.post(new Runnable(){
public void run() {
textpercentage.animate(x, x++);
System.out.println("enter"+x);
}
});
}
}
};
new Thread(runnable).start();
}
I am trying to animate digits on a textview using timely text view, however when I call startTimerThread from my code which is outside of onCreate neither do I get the text view to display not does the system.out execute. What do I miss here?
try like this
Handler handler = new Handler();
int delay=1000;
Runnable rann=new Runnable() {
#Override
public void run() {
//Write Your logic here which you want to perform periodically
System.out.println("Handler is running : ");
//to call the same thread repeatedly calling handler again
handler.postDelayed(rann, delay);
}
};
private void startHandler() {
//here the handler will executes the rannable after that particulary delay milli seconds
handler.postDelayed(rann, delay);
}
private void stopHandler() {
handler.removeCallbacks(rann);
}
I need stop thread and handler when my progress bar reaches 0 from 100 when thread runs the progress bar reaches but the progressStatus value going in negative please help me to stop thread after progress bar reaches 0
new Thread(runn =new Runnable() {
public void run() {
while (progressStatus <= 100) {
progressStatus += doWork();
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Update the progress bar
handler.post(runn1=new Runnable() {
public void run() {
bar.setProgress(progressStatus);
i=-1;
if(bar.getProgress()==0)
{
handler.removeCallbacks(runn);
handler.removeCallbacks(runn1);
System.out.println("Reached");
congrats.setVisibility(View.VISIBLE);
restart.setVisibility(View.VISIBLE);
rightbutton.setVisibility(View.GONE);
wrongbutton.setVisibility(View.GONE);
}
}
});
}
}
private int doWork() {
return i;
}
}).start();
your program is not thread safe, you actually reading and writing a variable (progressStatus) from two different threads, you must avoid doing that or if you want to do that you must use synchronized block. In order to solve your problem you can do this way:
Thread t;
progressStatus = 100;
t = new Thread(runn =new Runnable() {
public void run() {
while (!Thread.currentThread().isInterrupted()) {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
return;
}
// Update the progress bar
handler.post(runn1=new Runnable() {
public void run() {
bar.setProgress(progressStatus);
progressStatus=progressStatus-1;
if(bar.getProgress()==0)
{
handler.removeCallbacks(runn);
handler.removeCallbacks(runn1);
System.out.println("Reached");
congrats.setVisibility(View.VISIBLE);
restart.setVisibility(View.VISIBLE);
rightbutton.setVisibility(View.GONE);
wrongbutton.setVisibility(View.GONE);
t.interrupt();
}
}
});
another way that i recommend you is using ScheduledThreadPoolExecutor with the function scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit). something like:
final ScheduledThreadPoolExecutor myTimer = new ScheduledThreadPoolExecutor(1);
myTimer.scheduleAtFixedRate(new Runnable() {
#Override
public void run() {
getActivity().runOnUiThread(new Runnable(){
#Override
public void run(){
}
});
}
}
}, 0,10, TimeUnit.MILLISECONDS);
and in order to close it use myTimer.shutdownNow();
In my android application I want an automatically refresh every 60 seconds. So I tried it like this:
public void refresh_check() {
Thread myThread = new Thread()
{
int counter = 0;
#Override
public void run() {
MyActivity.this.runOnUiThread(new Runnable(){
#Override
public void run() {
while (counter < 60) {
try {
Thread.sleep(1000);
counter += 1;
System.out.println("Counter: " + counter);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
refresh();
}});
super.run();
}
};
myThread.start();
}
This works in the way that it prints the counter into logcat but in my Application I get a black view. refresh() is just a function with a http request, and this works alone, so the mistake has to be in the thread at any place :/ Can someone help?
You are not utilizing the Thread correctly. Running long tasks on the UI thread is just like not using a Thread at all. To accomplish what you need you should do it like this:
public void refresh_check() {
Thread myThread = new Thread()
{
int counter = 0;
#Override
public void run() {
while (counter < 60) {
try {
Thread.sleep(1000);
counter += 1;
System.out.println("Counter: " + counter); //I think this may cause exception, if it does try removing it
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
refresh(); // In refresh(), use TextView.post(runnable) to post update the TextView from outside the UI thread or use handlers
}});
super.run();
};
myThread.start();
}
Also, take a look at AsyncTask class, it enables you to run long tasks outside UI thread (doInBackground()) as well as update UI with the result from (onPostExecute())