Sorry, I keep on trying to adapt the tokens, but somehow I can't manage this one.
I have the following code:
timer.schedule(new TimerTask(){
runOnUiThread(new Runnable() {
public void run(){
SplashImage.setImageDrawable(aktieknop);}
});
},SplashTime);
}
Like this the code 'works':
timer.schedule(new TimerTask(){
// runOnUiThread(new Runnable() {
public void run(){
SplashImage.setImageDrawable(aktieknop);}
// });
},SplashTime);
}
Can you please help me solving this silly issue? Thanks a lot!
You must call this code line " SplashImage.setImageDrawable(nSplashImage); " from your run method in a runOnUIThread() method like this:
runOnUiThread(new Runnable() {
public void run() {
SplashImage.setImageDrawable(nSplashImage);
}
});
This is because you cannot change UI components on a non UI thread.
For the splash Screen you can use the Handler and send the delayed message.
Handler splashHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
//Here you can do what ever you want
}
};
int SPLASHTIME=2000;//your wish
splashHandler.sendMessageDelayed(msg, SPLASHTIME);
Related
From my generic fragment, I have this method:
protected void loadDataListWithDelay() {
Handler handler = new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
#Override
public void run() {
loadDataList();
}
}, DELAY_START_LOADING);
}
This method allows to start a new loading data from server (with Volley networking).
In my loadDataList() method there are some views visibility setting:
protected void loadDataList(String url, ArrayList<BaseFilters> filters,
String query, boolean byPassSearchMode) {
...
mLoadingDataListView.setVisibility(View.INVISIBLE);
mListContainer.setVisibility(View.VISIBLE);
...
This code runs perfectly, but I have this crash this morning on mobile with Android 6.0.1.
Could you help me guys?
I will give you a good advice, if you want to do postDelayed, take a view in your fragment (or any view), and do postDelayed with it. i.e. textView.postDelayed(.. This way you can be sure you are on the ui thread.
Why not use runOnUiThread instead of creating a new handler ?
runOnUiThread(new Runnable() {
#Override
public void run() {
loadDataList();
}
});
If you need a delay, then you can use a handler inside the runOnUiThread
runOnUiThread(new Runnable() {
#Override
public void run() {
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
loadDataList();
}
}, DELAY);
}
});
Runnable run = new Runnable() {
#Override
public void run() {
Log.i("runnable has run","a second must have passed");
}
};
handler.post(run);
When I write this code, this error appears:
cannot resolve`postDelayed.
Please tell me how to remove it.
I think you want to put delay use this code.
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
// do something here
}
}, 1000);
I'm trying to make a timer that will do a certain thing after a certain amount of time:
int delay = 1000;
int period = 1000;
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
//Does stuff
}
}, delay, period);
However, the app crashes after the wait period. This is Java code, so it might not be entirely compatible with Android (like while loops). Is there something I'm doing wrong?
Something like this should work, create a handler, and wait 1 second :) This is generally the best way of doing it, its the most tidy and also probably the best on memory too as its not really doing too much, plus as it's only doing it once it is the most simple solution.
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
// do your stuff
}
}, 1000);
If you would like something to run every one second then something like this would be best:
Thread thread = new Thread()
{
#Override
public void run() {
try {
while(true) {
sleep(1000);
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
thread.start();
If you want a GUI thread then something like this should work:
ActivityName.this.runOnUiThread(new Runnable()
{
public void run(){
try {
while(true) {
sleep(1000);
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
If your app is crashing after the wait period, then your timer task is doing its job and executing your code on schedule. The problem must then be in your code where run() occurs (for example, you may be trying to update UI elements in a background thread).
If you post more code and your logcat, I can probably be more specific about the error you are getting, but your question was in regards to TimerTask.
Timer and also you can run your code on UI thread:
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
myTimer = new Timer();
myTimer.schedule(new TimerTask() {
#Override
public void run() {
timerMethod();
}
}, 0, 1000);
}
private void timerMethod(){
// This method is called directly by the timer
// and runs in the same thread as the timer.
// We call the method that will work with the UI
// through the runOnUiThread method.
this.runOnUiThread(timerTick);
}
private Runnable timerTick = new Runnable() {
public void run() {
// This method runs in the same thread as the UI.
// Do something to the UI thread here
}
};
I would like to know if it's possible to use handler().postdelayed twice?
I mean, I want to create a button, that when clicked it change the color and stay in this state 1 second, then, after 1 second another button change the color.
I've created the following code:
In the onclicklistener:
btn3.setBackgroundColor(Color.WHITE);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
checkAnswer();
waitAnswer();
btnRsp3.setBackgroundResource(R.drawable.selector);
}
}, 1000);
CheckAnswer:
public void CheckAnswer(){
btn1.setBackgroundColor(Color.GREEN);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
}
}, 500);
btn1.setBackgroundResource(R.drawable.selector);
}
I think the problem is on CheckAnswer because it seems it doesn't stop in this postDelayed and step to the waitAnswer.
Thanks
Why do you expect it to stop on postDelayed? postDelayed places your Runnable to the Handler Looper queue and returns. Since both handlers are created on the same looper, the second runnable is executed after the first one terminates (plus whatever left of the 500 ms delay)
UPDATE:
You need something like that
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
btn1.setBackgroundColor(Color.GREEN);
}
}, 1000);
handler.postDelayed(new Runnable() {
#Override
public void run() {
btn1.setBackgroundResource(R.drawable.selector);
}
}, 2000);
new Handler().postDelayed(new Runnable()
{
#Override
public void run()
{
//Your Work
}
}, 1000);
I want to change some values onBackPressed method... And i override it like this:
#Override
public void onBackPressed() {
final Handler backHandler = new Handler();
backHandler.postDelayed(new Runnable() {
public void run() {
exitCount = 0;
Log.d("exitCount", "exitCount: " + exitCount);
}
}, Toast.LENGTH_SHORT);
}
But the problem is handler posts immediately... There's no delay. Where am i doing wrong?
Sorry if this is a lame question, i'm pretty new on Android. Thanks in advance.
That is because Toast.LENGTH_SHORT value is zero. Try declaring your constant with a delay value you choose. see here
Make the handler part of an activity (or part of a thread you are posting a message to if its not for the UI thread), and use a millisecond delay rather than Toast.LENGTH_SHORT which has a value of zero so it will happen instantly.
public class SomeActivity extends Activity {
private Handler mHandler = new Handler();
#Override
public void onBackPressed() {
mHandler.postDelayed(new Runnable() {
#Override
public void run() {
Log.d("tag", "Hello, Handler!");
}
}, 1000); // one second
}
}
Use belo code I hope it will work.
runOnUiThread(new Runnable() {
#Override
public void run() {
backHandler.postDelayed(new Runnable() {
public void run() {
exitCount = 0;
Log.d("exitCount", "exitCount: " + exitCount);
}
}, Toast.LENGTH_SHORT);
}
});