How to acces view properties from coroutines result
I am trying to do simple request to backend with coroutines
uiScope.launch {
try {
result = URL("https://httpbin.org/get").readText()
text.text = result
} catch (error: Error) {
text.text = error.message
} finally {
log(this@MainActivity,result)
}
}
but this exeption is thrown:
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
How to solve it?
kotlin kotlinx.coroutines
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
asked Nov 21 at 8:23
Nurseyit
11
add a comment |
I am trying to do simple request to backend with coroutines
uiScope.launch {
try {
result = URL("https://httpbin.org/get").readText()
text.text = result
} catch (error: Error) {
text.text = error.message
} finally {
log(this@MainActivity,result)
}
}
but this exeption is thrown:
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
How to solve it?
kotlin kotlinx.coroutines
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
asked Nov 21 at 8:23
Nurseyit
11
add a comment |
I am trying to do simple request to backend with coroutines
uiScope.launch {
try {
result = URL("https://httpbin.org/get").readText()
text.text = result
} catch (error: Error) {
text.text = error.message
} finally {
log(this@MainActivity,result)
}
}
but this exeption is thrown:
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
How to solve it?
kotlin kotlinx.coroutines
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
asked Nov 21 at 8:23
Nurseyit
11
I am trying to do simple request to backend with coroutines
uiScope.launch {
try {
result = URL("https://httpbin.org/get").readText()
text.text = result
} catch (error: Error) {
text.text = error.message
} finally {
log(this@MainActivity,result)
}
}
but this exeption is thrown:
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
How to solve it?
kotlin kotlinx.coroutines
kotlin kotlinx.coroutines
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
asked Nov 21 at 8:23
Nurseyit
11
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
asked Nov 21 at 8:23
Nurseyit
11
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
edited Nov 21 at 12:10
Marko Topolnik
145k19194321
145k19194321
asked Nov 21 at 8:23
Nurseyit
11
asked Nov 21 at 8:23
Nurseyit
11
asked Nov 21 at 8:23
Nurseyit
11
11
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Your uiScope isn't set up correctly, apparently its dispatcher is not Dispatchers.Main. So the first thing to fix is your implementation of the coroutineContext property, which should be
override val coroutineContext = Dispatchers.Main + SupervisorJob()
Once you fix that, your code will be making a blocking call on the UI thread. To make the blocking call on a background thread, but still keep the rest of the coroutine on the UI thread, write
uiScope.launch {
try {
text.text = withContext(Dispatchers.IO) {
URL("https://httpbin.org/get").readText()
}
} catch (e: Exception) {
text.text = e.message
} finally {
log(this@MainActivity, result)
}
}
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
again "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." thrown
– Nurseyit
Nov 21 at 11:52
This indicates that you didn't set upuiScopeto actually be a UI-based coroutine scope. ItscoroutineContextmust returnDispatchers.Main + job.
– Marko Topolnik
Nov 21 at 11:55
but Dispatchers.Main throws: android.os.NetworkOnMainThreadException
– Nurseyit
Nov 21 at 12:09
It doesn't with the code as in my answer.
– Marko Topolnik
Nov 21 at 12:09
add a comment |
I found solution. I can not access UI component from another thread, at the same time I can not make internet request on the main thread. So I should chouse one of them. Solution was to use ViewModel components and update it's value which subsequently will chane the UI
var viewModel = ViewModelProviders.of(this).get(MyViewModel::class.java)
viewModel.selected.observe(this, Observer{ users ->
text.text = users
})
uiScope.launch {
try {
result = URL("http://jsonplaceholder.typicode.com/posts").readText()
viewModel.selected.postValue(result)
} catch (error: Error) {
viewModel.selected.postValue(error.toString())
}
}
log(this@MainActivity,result)
answered Nov 21 at 14:54
Nurseyit
11
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Your uiScope isn't set up correctly, apparently its dispatcher is not Dispatchers.Main. So the first thing to fix is your implementation of the coroutineContext property, which should be
override val coroutineContext = Dispatchers.Main + SupervisorJob()
Once you fix that, your code will be making a blocking call on the UI thread. To make the blocking call on a background thread, but still keep the rest of the coroutine on the UI thread, write
uiScope.launch {
try {
text.text = withContext(Dispatchers.IO) {
URL("https://httpbin.org/get").readText()
}
} catch (e: Exception) {
text.text = e.message
} finally {
log(this@MainActivity, result)
}
}
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
again "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." thrown
– Nurseyit
Nov 21 at 11:52
This indicates that you didn't set upuiScopeto actually be a UI-based coroutine scope. ItscoroutineContextmust returnDispatchers.Main + job.
– Marko Topolnik
Nov 21 at 11:55
but Dispatchers.Main throws: android.os.NetworkOnMainThreadException
– Nurseyit
Nov 21 at 12:09
It doesn't with the code as in my answer.
– Marko Topolnik
Nov 21 at 12:09
add a comment |
Your uiScope isn't set up correctly, apparently its dispatcher is not Dispatchers.Main. So the first thing to fix is your implementation of the coroutineContext property, which should be
override val coroutineContext = Dispatchers.Main + SupervisorJob()
Once you fix that, your code will be making a blocking call on the UI thread. To make the blocking call on a background thread, but still keep the rest of the coroutine on the UI thread, write
uiScope.launch {
try {
text.text = withContext(Dispatchers.IO) {
URL("https://httpbin.org/get").readText()
}
} catch (e: Exception) {
text.text = e.message
} finally {
log(this@MainActivity, result)
}
}
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
again "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." thrown
– Nurseyit
Nov 21 at 11:52
This indicates that you didn't set upuiScopeto actually be a UI-based coroutine scope. ItscoroutineContextmust returnDispatchers.Main + job.
– Marko Topolnik
Nov 21 at 11:55
but Dispatchers.Main throws: android.os.NetworkOnMainThreadException
– Nurseyit
Nov 21 at 12:09
It doesn't with the code as in my answer.
– Marko Topolnik
Nov 21 at 12:09
add a comment |
Your uiScope isn't set up correctly, apparently its dispatcher is not Dispatchers.Main. So the first thing to fix is your implementation of the coroutineContext property, which should be
override val coroutineContext = Dispatchers.Main + SupervisorJob()
Once you fix that, your code will be making a blocking call on the UI thread. To make the blocking call on a background thread, but still keep the rest of the coroutine on the UI thread, write
uiScope.launch {
try {
text.text = withContext(Dispatchers.IO) {
URL("https://httpbin.org/get").readText()
}
} catch (e: Exception) {
text.text = e.message
} finally {
log(this@MainActivity, result)
}
}
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
Your uiScope isn't set up correctly, apparently its dispatcher is not Dispatchers.Main. So the first thing to fix is your implementation of the coroutineContext property, which should be
override val coroutineContext = Dispatchers.Main + SupervisorJob()
Once you fix that, your code will be making a blocking call on the UI thread. To make the blocking call on a background thread, but still keep the rest of the coroutine on the UI thread, write
uiScope.launch {
try {
text.text = withContext(Dispatchers.IO) {
URL("https://httpbin.org/get").readText()
}
} catch (e: Exception) {
text.text = e.message
} finally {
log(this@MainActivity, result)
}
}
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
edited Nov 21 at 12:46
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
answered Nov 21 at 11:41
Marko Topolnik
145k19194321
145k19194321
again "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." thrown
– Nurseyit
Nov 21 at 11:52
This indicates that you didn't set upuiScopeto actually be a UI-based coroutine scope. ItscoroutineContextmust returnDispatchers.Main + job.
– Marko Topolnik
Nov 21 at 11:55
but Dispatchers.Main throws: android.os.NetworkOnMainThreadException
– Nurseyit
Nov 21 at 12:09
It doesn't with the code as in my answer.
– Marko Topolnik
Nov 21 at 12:09
add a comment |
again "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." thrown
– Nurseyit
Nov 21 at 11:52
This indicates that you didn't set upuiScopeto actually be a UI-based coroutine scope. ItscoroutineContextmust returnDispatchers.Main + job.
– Marko Topolnik
Nov 21 at 11:55
but Dispatchers.Main throws: android.os.NetworkOnMainThreadException
– Nurseyit
Nov 21 at 12:09
It doesn't with the code as in my answer.
– Marko Topolnik
Nov 21 at 12:09
again "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." thrown
– Nurseyit
Nov 21 at 11:52
again "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." thrown
– Nurseyit
Nov 21 at 11:52
This indicates that you didn't set up
uiScope to actually be a UI-based coroutine scope. Its coroutineContext must return Dispatchers.Main + job.– Marko Topolnik
Nov 21 at 11:55
This indicates that you didn't set up
uiScope to actually be a UI-based coroutine scope. Its coroutineContext must return Dispatchers.Main + job.– Marko Topolnik
Nov 21 at 11:55
but Dispatchers.Main throws: android.os.NetworkOnMainThreadException
– Nurseyit
Nov 21 at 12:09
but Dispatchers.Main throws: android.os.NetworkOnMainThreadException
– Nurseyit
Nov 21 at 12:09
It doesn't with the code as in my answer.
– Marko Topolnik
Nov 21 at 12:09
It doesn't with the code as in my answer.
– Marko Topolnik
Nov 21 at 12:09
add a comment |
I found solution. I can not access UI component from another thread, at the same time I can not make internet request on the main thread. So I should chouse one of them. Solution was to use ViewModel components and update it's value which subsequently will chane the UI
var viewModel = ViewModelProviders.of(this).get(MyViewModel::class.java)
viewModel.selected.observe(this, Observer{ users ->
text.text = users
})
uiScope.launch {
try {
result = URL("http://jsonplaceholder.typicode.com/posts").readText()
viewModel.selected.postValue(result)
} catch (error: Error) {
viewModel.selected.postValue(error.toString())
}
}
log(this@MainActivity,result)
answered Nov 21 at 14:54
Nurseyit
11
add a comment |
I found solution. I can not access UI component from another thread, at the same time I can not make internet request on the main thread. So I should chouse one of them. Solution was to use ViewModel components and update it's value which subsequently will chane the UI
var viewModel = ViewModelProviders.of(this).get(MyViewModel::class.java)
viewModel.selected.observe(this, Observer{ users ->
text.text = users
})
uiScope.launch {
try {
result = URL("http://jsonplaceholder.typicode.com/posts").readText()
viewModel.selected.postValue(result)
} catch (error: Error) {
viewModel.selected.postValue(error.toString())
}
}
log(this@MainActivity,result)
answered Nov 21 at 14:54
Nurseyit
11
add a comment |
I found solution. I can not access UI component from another thread, at the same time I can not make internet request on the main thread. So I should chouse one of them. Solution was to use ViewModel components and update it's value which subsequently will chane the UI
var viewModel = ViewModelProviders.of(this).get(MyViewModel::class.java)
viewModel.selected.observe(this, Observer{ users ->
text.text = users
})
uiScope.launch {
try {
result = URL("http://jsonplaceholder.typicode.com/posts").readText()
viewModel.selected.postValue(result)
} catch (error: Error) {
viewModel.selected.postValue(error.toString())
}
}
log(this@MainActivity,result)
answered Nov 21 at 14:54
Nurseyit
11
I found solution. I can not access UI component from another thread, at the same time I can not make internet request on the main thread. So I should chouse one of them. Solution was to use ViewModel components and update it's value which subsequently will chane the UI
var viewModel = ViewModelProviders.of(this).get(MyViewModel::class.java)
viewModel.selected.observe(this, Observer{ users ->
text.text = users
})
uiScope.launch {
try {
result = URL("http://jsonplaceholder.typicode.com/posts").readText()
viewModel.selected.postValue(result)
} catch (error: Error) {
viewModel.selected.postValue(error.toString())
}
}
log(this@MainActivity,result)
answered Nov 21 at 14:54
Nurseyit
11
answered Nov 21 at 14:54
Nurseyit
11
answered Nov 21 at 14:54
Nurseyit
11
answered Nov 21 at 14:54
Nurseyit
11
11
add a comment |
add a comment |
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