Android :: Check If The View Is Visible On The Window
Sep 4, 2010
What's the best way to check if the view is visible on the window?
I have a CustomView which is part of my SDK and anybody can add CustomView to their layouts. My CustomView is taking some actions when it is visible to the user periodically. So if view becomes invisible to the user then it needs to stop the timer and when it becomes visible again it should restart its course.
But unfortunately there is no certain way of checking if my CustomView becomes visible or invisible to the user. There are few things that I can check and listen to: onVisibilityChange, it is for view's visibility change, and is introduced in new API 8 version so has backward compatibility issue onWindowVisibilityChange, but my CustomView can be part of a ViewFlipper's Views so it can pose issues onDetachedFromWindows, this not as useful onWindowFocusChanged //Again my CustomView can be part of ViewFlipper's views. So if anybody has faced this kind of issues please throw some light.
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Sep 24, 2010
I set sameting to invisible like this on Android: myImageView.setVisibility(View.INVISIBLE);
And then visible like this: myImageView.setVisibility(View.VISIBLE);
I don't know if myImageView is visible or not now, how can I check it like this:
if (IF myImageView IS VISIBLE) {Do something} else {Do something else}
How can I do that? What do I have to write within the brackets?
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Aug 5, 2009
I wanted to change the frame around my Dialog. So I set up a style...
And yay! I get my new frame. However, the parent window disappears (goes black).
Having a normal dialog: <activity android:name=".MyActivity" android:theme="@android:style/ Theme.Dialog"> keeps the parent window visible.
Can I have a custom frame on a dialog and keep the parent window visible?
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Aug 20, 2010
I want to be able to tell if a view is visible in my listview, which is populated by a custom CursorAdapter. How can I do this?
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Jun 24, 2010
Is there a way to get the first visible View out of the ListView in Android?I can get the data that backs the first View in the Adapter but it seems I can't get the first View in ListView.I want to change the first visible view after a scroll action finished. I know that I should not save references to the view.
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Jun 4, 2009
I have a list view which contains some 20 odd items along with a check box. Now when iam trying to delete an item by checking its checkbox,Now if I have six elements in this ViewList, which are visible on the emulator, then the same code just works fine. Problem arises when the list is long and it starts scrolling and some element are not visible.
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Jan 11, 2010
How can I change the first visible item in a list view (I searched a method such as setFirstVisiblePosition) ?
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May 7, 2010
I can't find a way to obtain a reference the Window containing an arbitrary View v. I found getWindowToken, but I can't figure out how to use it? Does anyone know how? Also, does anyone know why it returns an IBinder rather than a Window?
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Aug 23, 2010
I have made a sample application to flip through different layouts in a viewflipper.
XML is basically (pseudo-code)
<ViewFlipper>
<LinearLayout><TextView text:"this is the first page" /></LinearLayout>
<LinearLayout><TextView text:"this is the second page" /></LinearLayout>
<LinearLayout><TextView text:"this is the third page" /></LinearLayout>
</ViewFlipper>...........
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Jan 14, 2010
Does anyone know how to make a ListView object larger such that more than one Entry item is visible at the same moment ? Both parents are already set with "fill_parent" but the view continues to show one-and- a-half Entries.
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Nov 20, 2010
I'd like to ask about how to proper handle progress Dialog in Thread, since getting the error from subject. My code...
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Feb 8, 2010
I am having some of the following exceptions:
CODE:................
I have googled it and see that it has something to do with popups and turning the screen, but there is no reference to my code.
The questions are:
Is there a way to find out exactly when this issue is happening? other than turning the screen, is there another event or action that triggers this error? how do I prevent this to happen?
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Apr 4, 2014
Can you create a popup window in eclipse with web view in it, if so remotely how to achieve this. Im trying to get part of an app when loaded to automatically popup a web view box over the top of everything
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Apr 18, 2009
Is there a way to check if a view contains another certain view? I have an AbsoluteLayout view that I add multiple views to (buttons). I have a certain button, let's call it reportButton, and I want to check to see if its already within my AbsoluteLayout view. Is there like an AbsoluteLayout.contains(reportButton) method or something of the kind?
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May 22, 2009
I want to show a view on calling a Service API. Currently the only way looks like using the Toast class.
I tried the following after getting the WindowManager service, but it crashes at addView. I looked into the Toast class and found that it uses WindowManagerImpl which is not accessible publicly - is there any way to access the WindowManagerImpl functionality?
CODE:.................
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Jul 31, 2010
I am getting the following remotely from clients so I don't know what hardware etc they are using.
CODE:................
This is happening because of a ProgressDialog
CODE:.............
The Activity looks like this in the Manifest.
CODE:........................
So what could this mean? I think it has something to do with the Activity being destroyed then created but as you can see I have the configChanges set correctly.
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Nov 19, 2009
I recently got some fade in stuff working so that my "loading" view is an ImageView that takes up the whole screen, and then I fade in the main view (a GridView in this case) over the top of it. In the activity creation, I call:
CODE:.........
Then when the loading AsyncTask is done, I call the following:
CODE:...............
Do I need to do anything in particular to clean up the loading_foo view to reduce the amount of memory my app is using? Any other issues with this approach?
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Jun 10, 2010
When I apply some animation to the view, which is out of window, the animation not start immediately. And then, I scroll the screen to show the animation target view, the animation will start. I hope to the animation will start immediately when it apply.
Bellow is sample code.................
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May 5, 2009
I am using a custom title view in my application for each activity. In one of the activities, based on button clicks I need to change the custom title view. Now this works fine every time when I make a call to setFeatureInt.
But if I try to update any items in the custom title (say change the text of a button or a text view on the title), the update does not take place.
Debugging through the code shows that the text view and button instances are not null and I can also see the custom title bar. But the text on the text view or the button is not updated. Has anyone else faced this problem? How do I resolve it?
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Sep 21, 2009
When i ran my old application in 1.6 i noticed that the progress bar was not showing up on the screen.When i analyzed it further i found the issue.The progress bar is getting activated but its not visible since my background color is also white.When i changed the background color i was able to see the progress bar.Is there no other way to make the progress bar visible other than changing the background color..Shouldn't the progress bar be visible under all background colors??
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Nov 8, 2010
I am getting this error automatically sent to me from a lot of beta users. ava.lang. Illegal ArgumentException: View not attached to window manager at android.view. Window Manager Impl.findViewLocked(WindowManagerImpl.java: 355) At android.view.Window Manager Impl. removeView(WindowManagerImpl.java:200) at android.view. Window $LocalWindow Manager . removeView(Window.java:43 2) at android.app.Dialog .dismissDialog(Dialog.java:278) at android. app. Dialog. access $000 (Dialog.java:71) at ndroid.app .Dialog$1.run (Dialog. java:111) at android .os.Handler.handleCallback(Handler.java:587) at android.os. Handler. dispatch Message(Handler.java:92) at android. os.Looper. loop (Looper.java:143) at android.app. Activity Thread . main (Activity Thread.java:4701) at java. lang.reflect .Method.invokeNative(Native Method)at java.lang.reflect.Method.invoke(Method.java:521) At com.android. internal.os. ZygoteInit $Method And Args Caller.run (ZygoteInit .java:868) at com.android.internal. os. ZygoteInit .main(ZygoteInit.java:626) at dalvik . system . Native Start.main(Native Method) Since it comes from external beta users I dont know what they were doing when they got it. Nor do i know how to reproduce it. The stack trace does not list any of our code. Usually, this error means that there was an orientation change while a dialog was open, thereby invalidating the reference to the dialog when android recreates it. All of my activities already uses Android:configChanges="keyboardHidden|orientation" in order to prevent them from doing this. We still get the error. Has anyone else seen this before? What could be the problem?
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Apr 30, 2010
I have an activity that starts AsyncTask and shows progress dialog for the duration of operation. The activity is declared NOT be recreated by rotation or keyboard slide.
CODE:............
Once task completed, I dissmiss dialog, but on some phones (framework: 1.5, 1.6) such error is thrown:
CODE:...............
My code is:
CODE:................
From what I have read (http://bend-ing.blogspot.com/2008/11/properly-handle-progress-dialog-in.html) and seen in Android sources, it looks like the only possible situation to get that exception is when activity was destroyed. But as I have mentioned, I forbid activity recreation for basic events.
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Nov 20, 2010
I'd like to ask about how to proper handle progressDialog in Thread, since gettings the error from subject.
My code:
CODE:.......
Problem occurs when a dialog progress appears and I change my phone orientation, it freezes and crashes.
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May 9, 2009
I am wondering how to track down this IAE? It doesn't mention my code (com.newsrob.*) in the stack trace.
Is there anymore information that I can automatically gather and include in the bug reports to get a better understanding why this happens?
CODE:..............................
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Feb 17, 2009
I have a list view with checkbox .List view contains all email list from phonebook application.Now i want to check multiple email at a time.After checking the email items ,I want to send some request to selected email. So,please tell me how to do this? any sample code or tutorial or anything relevant to this?
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Jul 31, 2010
What is the best way to check if street view is available for a GeoPoint location? There seems to be no way of figuring this out, but the map google app grays out the street view button if not available?
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Oct 5, 2010
How to get that working:
CODE:...............
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Nov 26, 2009
I am new to android development.I am trying to prepare a list view with check boxes without using android.R.layout.simple_list_item_multiple_choice. xml inbuilt file.But am i facing problems with check box on click events.
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Apr 14, 2010
I'm trying to open a dialog window, but every time I try to open it it throws this exception:
CODE:.................
I'm creating it by calling showDialog with the display's id. The onCreateDialog handler logs fine and I can step through it without an issue, but I've attached it since it seems like I'm missing something:
CODE:............
Is there something missing from this? Some questions have talked about having this problem when creating a dialog from onCreate, which happen because the activity isn't created yet, but this is coming from a call from a menu object, and the appContext variable seems like it is correctly populated in the debugger.
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Sep 1, 2010
What is the basic difference between the PhoneWindow and MidWindow policies? I found that the emulator version takes the implementations of the PhoneWindow.When the MidWindow implementations will be used? Also, I found that PhoneWindow handles the call settings implementation and the same is not there in MidWindow? Please someone help me pointing out the differences between both the policies and under which circumstances which one will be used.
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