When I flip the keyboard, the layout changes from portrait to landscape, activity is recreated but any background thread keeps running. How can I prevent orientation change/activity from being recreated until my background thread finishes.
View 2 Replies
How can I stop a background thread on keyboard flip in android?
View 1 Replies View RelatedI'm testing an app on a Droid. It's a kind of card matching game. I'd like to keep the cards physically located in the same place on the screen regardless of a screen rotation. For example, I can put my thumb on a card, rotate the phone any way I please and the card stays fixed under my thumb. However, the orientation of the content of the card will change to match the current phone rotation. I handle this by transforming the card grid in onCreate. This works fine for 90 degree rotations, but if I do a fast 180 degree flip from one landscape mode to another the screen simply flips and the Activity is NOT destroyed and recreated.
This seems contrary to the documentation:
http://developer.android.com/reference/android/R.attr.html#configChanges
"public static final int configChanges Since: API Level 1
Specify one or more configuration changes that the activity will handle itself. If not specified, the activity will be restarted if any of these configuration changes happen in the system. Otherwise, the activity will remain running and its Activity.onConfigurationChanged method called with the new configuration. "
I am NOT specifying any configChanges in my AndroidManifest.xml file, so it seems that the activity SHOULD be destroyed and recreated. Why isn't it? Is there some way I specify that it should be destroy/ recreated?
Well, preventing an orientation change is easy. But what about doing it at run time.
Say, I have an activity which supports orientation change in normal situations. It has say three Edit Texts.
There's also a button, which when clicked would do some processing in a thread while showing a ProgressDialog which is not cancellable.
Ok, so till the user hits the Button, I want the activity to be able to adapt the orientation changes. I have two layouts files for each orientation with different layout schemes.
What I want is this. Once the user clicks on the button, and the ProgressDialog is showing, I don't want the activity now to be re- created again when the orientation changes. So, before showing the ProgressDialog, is there any way to tell the Activity not to handle Orientation change?
Also, once the process is complete, and the ProgressDialog is removed, I want the Activity again to be able to handle orientation changes.
My MainActivity (the one that is started by the android application) is a TabActivity which contains several tabs (which are implemented as activities as well). In a certain tab/activity I want to prevent the change of orientation/rotation when the phone is turned. What is the easiest way to achieve this?
View 2 Replies View Relatedwhen i open my keyboard, it restarts the activity. i use only landscape mode and dont want the activity to restart.
View 2 Replies View RelatedI've got an activity that calls a helper class called DownloadManager. DownloadManager spawns a thread that downloads a mp3 to the sdcard. I'm having some trouble finding the best design for resuming the initial activity and starting the MediaPlayer. Does it make the most sense to use a BroadcastReceiver that receives a message that download is complete, then start a new Intent of my activity? Think I saw something that I can't use an Intent to start an Activity from BroadcastReceiver because it is a background process.
View 4 Replies View RelatedMy program does some network activity in a background thread. Before starting, it pops up a progress dialog. The dialog is dismissed on the handler.This all works fine, except when screen orientation changes while the dialog is up (and the background thread is going). At this point the app either crashes, or deadlocks, or gets into a weird stage where the app does not work at all until all the threads have been killed.How can I handle the screen orientation change gracefully?
View 9 Replies View RelatedOccasionally I see thread execution hiccups on my Motorola Droid (currently running 2.1 but I saw it with 2.0.1, too). Normally my dummy thread (full tilt, foreground, not doing *anything* else) runs in about 5-6mS. However, I see a second hump around 13-14mS and stragglers anywhere out to 80mS (typically around 35mS, though). What is going on? Why is this scheduling so non-deterministically? What is the solution? I could deal with a couple mS slower if it would get rid of those stragglers that exist the whole way out to 50-80mS..................
View 2 Replies View RelatedI have an android app that repeatedly collects fingerprints from the wifi-networks that are around (for scientific reasons, not to invade anybodies privacy). Anyways, imagine I have a function that does this work and it's called scanWifi(). I initally wanted to start it like this:
ExecutorService mExecutor = Executors.newSingleThreadScheduledExecutor();
mExecutor.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
scanWifi();
}
}, 0, interval, TimeUnit.MILLISECONDS);
Sadly, this only works reliably when the phone is plugged in. If it's plugged out and lays there for a while, it doesn't run my scanWifi() function every minute. Sometimes there are gaps of several minutes between single calls to scanWifi(). I also tried doing the same thing using a Timer/TimerTask with similarly poor results. The only thing that seems to work more or less reliable until now is to post it to a handler and call it repeatedly, like this:
Handler h = new Handler();
Runnable r = new Runnable() {
@Override
public void run() {
if (!mIsStopped) {
scanWifi();
h.postDelayed(this, mInterval);
}
}
};
h.post(r);
Why is that the case? Is the CPU sleeping and thus misses the scheduled execution? I hold a partial wakelock in my app.
Suppose i have one simple function in my program. Whenever i call that function does a new thread or process is spawned to execute the function or it is executed under the main thread memory space only.
View 4 Replies View RelatedI have created an activity for my game which handles all orientation changes by itself and has a fixed "portrait" layout. Actually it uses the accelerometer and is rendered using 2D canvas methods. If the level has been completed I show up a highscore dialog in which the user can enter his name. The dialog is floating above the underlying level screen which gets blurred out nicely. This generally works.
Problem is that the dialog does not get rotated if the orientation of the phone changes. So even if the keyboard is exposed the dialog is shown in portrait mode instead of landscape. I have tried to use an activity with dialog theme instead but the behavior didn't change. After several tries it seems that I have found the reason for this: Once there's an activity with fixed orientation in the activity stack then all subsequent activities keep this orientation, too. They will not react on orientation changes anymore (e.g. if the keyboard gets exposed).
After upgrading to 1.5 SDK the described behavior changed a little bit. Now at subactivities indead react on orientation changes like expected. However, the need to have an opaque background! That means that neither dialogs nor activities with dialog theme will work. Those will stick with the orientation of the underlaying activity. So my workaround is to first start a sub-activity with an opaque black background. This activity then shows my highscore dialog on top. It looks quite okay but I wonder if there's a better solution? Is it possible to show a dialog above a fixed portrait or landscape activity which automatically adapts to orientation changes?
I snap a photo, and it gets placed onto an ImageView. When the user sees the page where the Image View is, and I turn the phone sideways where the orientation is horizontal, the app immediately returns to the app's main screen.
View 1 Replies View RelatedI understand how to force a specific orientation per activity in the android manifest. I would like to know if it is possible to allow the keyboard to change orientation even though the activity(the layout really) must remain unchanged.
View 1 Replies View RelatedI've successfully implemented onRetainNonConfigurationInstance() for my main activity to save and restore certain critical components across screen orientation changes.
But it seems, my custom views are being re-created from scratch when the orientation changes. This makes sense, although in my case it's inconvenient because the custom view in question is an X/Y plot and the plotted points are stored in the custom view.
Is there a crafty way to implement something similar to onRetainNonConfigurationInstance() for a custom view, or do I need to just implement methods in the custom view which allow me to get and set its "state"?
well just baught this in the app store and its really confusing need some help like wen i open up the weather and toggle flip clock widget the time doesnt flip et dont know how to get/delete skins just iso someone who has this and knows how to run this.
View 2 Replies View RelatedIs this possible to do? Landscape mode distorts the background image, and therefore I would like to lock orientation to vertical on phones with accelerometers.
View 2 Replies View RelatedI have the giant clock/weather widget on my homescreen (the one that comes on the phone when you first get it and the one most people probably use). I have seen animations of this clock on the HTC site that show the digits flipping over. And you would think it would do that anyway based on the design. However, I noticed my doesn't really flip. The digits just change instantaneously. No flipping animation. Is this just mine or is that how it is? I was actually hoping it would flip because I always thought it looked neat.
View 13 Replies View RelatedI have a notification that starts my activity and passes a messages using the intent's putExtra() function. The message is then displayed to the user in the activity's onCreate function. When the application is restarted due to a orientation change, the message is shown again as it is still in the intent's bundled data.
How can I remove the extra data?
I tried the following:
Bundle bundle = getIntent().getExtras();
if (bundle.getBoolean("showMessage")) {
// ... show message that is in bundle.getString("message")
// remove message
bundle.remove("showMessage");
}
But the message will still be shown after the orientation changed, seems like the intent used is not the one I changed, but the original one. The only workaround I found is to save the showMessage additionally in onSaveInstanceState(). Is there another way? Or is this the way to go?
I have a widget which has say, a dimension of 294*72(portrait). But when the orientation is changed, I need to change this dimension of the widget to another dimension which would look good on the landscape orientation.
View 4 Replies View RelatedI have an image set as my background and when it is vertical, the image looks fine. However, when the orentation is changed, the image get streched out. If there a way that I can change the image based on the orentation of the device?
View 4 Replies View RelatedThere are many questions related to how to programatically show/hide the soft keyboard.
However, as we all know the android back button will cause the keyboard to be dismissed. Is there a way to prevent the user from dismissing the keyboard with a back button press?
I tried to capture the back button, but when the keyboard is displayed onKeyDown in my activity is not invoked when the back key is pressed and soft keyboard is visible.
Is there any way to prevent the soft keyboard from appearing through out my application? I have implemented my custom keyboard and do not want the soft keyboard from appearing on focus of the EditText. is there any way or is setting the input type for each EditText as TYPE_NULL the only way.
View 2 Replies View RelatedI have my android:screenOrientation="portait" on but when a physical keyboard is opened it doesn't rotate the screen as I wanted, but it restarts the app. It seems to run onCreate over again or something. Can someone point me in the right direction and/or tell me how to intercept this and handle it?
View 2 Replies View RelatedI have a vertical sliding drawer at the bottom of my app. When the soft keyboard opens, it pushes the tab for the drawer up, so it sits atop the keyboard. I actually want it to remain at the bottom of the screen, becoming hidden when the keyboard is shown.
View 1 Replies View RelatedIs there a way to prevent the virtual keyboard from moving and resizing views? I have a table with a row of 4 buttons at the bottom of a relative layout that are centered and equally sized, very similar to the 3 buttons that appear at the bottom of the Gmail app when an email is checked. When the virtual keyboard appears, the buttons move to stay just above the virtual keyboard. When this happens, the four buttons become small and get squished to the left, leaving tons of blank space to the right of the buttons. Is there a property I can set on the table, row, and/or buttons to prevent this from happening?
View 3 Replies View RelatedFinally I've been waiting for something like this. Swype - portrait; stock - landscape.Assign Keyboards Based on Orientation - Keyboard Manager for Android | xda-developers
View 2 Replies View RelatedI am starting a service from an activity. Once the services starts, the calling activity loses focus and blocks till the service is completed. Why is this and is there a way around it to return the control to the calling activity while the service runs in the background?
View 6 Replies View RelatedIt would be sweet if the Droid (or OS 2.0.1 as the case may be), when switching orientation from portrait to landscape, would keep the keyboard showing if it was already showing in the prior orientation.Often, I'll be typing a text in portrait mode and then realize that I'd prefer to type faster and more accurately.However, when I switch to landscape orientation, I have to click/highlight the text box in order for the virtual keyboard to show again.It's a bit of a hassle.Oh yeah, for the hardware keyboard lovers out there that suggest I use it instead.I hate the hardware keyboard.though curiously,the keypad is pretty nice for moving the cursor.
View 3 Replies View RelatedI am looking for a case that will prevent the keyboard from sliding out. I know I will more than likely not find what I am looking for because the slide out keyboard is a selling point for this phone, but mine keeps sliding out in my pocket and I am concerned that the open portion of the keyboard might bend, flex or crack if it is bent the wrong way. Maybe I am being paranoid, but it never hurts to be preventative
View 1 Replies View Related