[android-developers] Re: Displaying a now loading image while applic is, well, loading
Yep.. it's that simple. Pls note however that whatever content you're setting will not be actually visible until onCreate() is completed. If your onCreate() processing is lengthy, as ours, you're better off placing your startup image in a dedicated activity. On May 5, 12:34 am, Marco Nelissen marc...@android.com wrote: Why not set your content view to be an ImageView with the desired image, and then once you're ready to show the real UI, call setContentView() again with the real UI? On Mon, May 4, 2009 at 2:22 PM, GiladH gila...@gmail.com wrote: Tnx but that is not what I'm looking for. I basically want to display an image (packed within form/view/ whatever) WITHOUT blocking the UI thread, Can this be done? On May 4, 8:16 pm, Jeff Sharkey jshar...@android.com wrote: Take a peek at AsyncTask, it can help you easily (and correctly) transition between UI and background threads: http://d.android.com/reference/android/os/AsyncTask.html j On Mon, May 4, 2009 at 10:02 AM,GiladHgila...@gmail.com wrote: Hey, I want to display a fancy 'loading' image at my app's startup time. The problem: my startup code is mostly GUI related, hence needs to run on UI thread. Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user? GiladH -- Jeff Sharkey jshar...@google.com --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Displaying a now loading image while applic is, well, loading
Well, no. If the work you're doing takes that long, you should do it in another thread. Or, if you absolutely must to do it in your main thread (you never did say why you think you need to do that), you should break it up in to smaller chunks and post messages to your main thread to tell it to process each of those chunks. On Tue, May 5, 2009 at 8:11 AM, GiladH gila...@gmail.com wrote: Yep.. it's that simple. Pls note however that whatever content you're setting will not be actually visible until onCreate() is completed. If your onCreate() processing is lengthy, as ours, you're better off placing your startup image in a dedicated activity. On May 5, 12:34 am, Marco Nelissen marc...@android.com wrote: Why not set your content view to be an ImageView with the desired image, and then once you're ready to show the real UI, call setContentView() again with the real UI? On Mon, May 4, 2009 at 2:22 PM, GiladH gila...@gmail.com wrote: Tnx but that is not what I'm looking for. I basically want to display an image (packed within form/view/ whatever) WITHOUT blocking the UI thread, Can this be done? On May 4, 8:16 pm, Jeff Sharkey jshar...@android.com wrote: Take a peek at AsyncTask, it can help you easily (and correctly) transition between UI and background threads: http://d.android.com/reference/android/os/AsyncTask.html j On Mon, May 4, 2009 at 10:02 AM,GiladHgila...@gmail.com wrote: Hey, I want to display a fancy 'loading' image at my app's startup time. The problem: my startup code is mostly GUI related, hence needs to run on UI thread. Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user? GiladH -- Jeff Sharkey jshar...@google.com --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Displaying a now loading image while applic is, well, loading
Take a peek at AsyncTask, it can help you easily (and correctly) transition between UI and background threads: http://d.android.com/reference/android/os/AsyncTask.html j On Mon, May 4, 2009 at 10:02 AM, GiladH gila...@gmail.com wrote: Hey, I want to display a fancy 'loading' image at my app's startup time. The problem: my startup code is mostly GUI related, hence needs to run on UI thread. Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user? GiladH -- Jeff Sharkey jshar...@google.com --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Displaying a now loading image while applic is, well, loading
Tnx but that is not what I'm looking for. I basically want to display an image (packed within form/view/ whatever) WITHOUT blocking the UI thread, Can this be done? On May 4, 8:16 pm, Jeff Sharkey jshar...@android.com wrote: Take a peek at AsyncTask, it can help you easily (and correctly) transition between UI and background threads: http://d.android.com/reference/android/os/AsyncTask.html j On Mon, May 4, 2009 at 10:02 AM,GiladHgila...@gmail.com wrote: Hey, I want to display a fancy 'loading' image at my app's startup time. The problem: my startup code is mostly GUI related, hence needs to run on UI thread. Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user? GiladH -- Jeff Sharkey jshar...@google.com --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Displaying a now loading image while applic is, well, loading
Why not set your content view to be an ImageView with the desired image, and then once you're ready to show the real UI, call setContentView() again with the real UI? On Mon, May 4, 2009 at 2:22 PM, GiladH gila...@gmail.com wrote: Tnx but that is not what I'm looking for. I basically want to display an image (packed within form/view/ whatever) WITHOUT blocking the UI thread, Can this be done? On May 4, 8:16 pm, Jeff Sharkey jshar...@android.com wrote: Take a peek at AsyncTask, it can help you easily (and correctly) transition between UI and background threads: http://d.android.com/reference/android/os/AsyncTask.html j On Mon, May 4, 2009 at 10:02 AM,GiladHgila...@gmail.com wrote: Hey, I want to display a fancy 'loading' image at my app's startup time. The problem: my startup code is mostly GUI related, hence needs to run on UI thread. Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user? GiladH -- Jeff Sharkey jshar...@google.com --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Displaying a now loading image while applic is, well, loading
You can also do the trick maps does, where your activity's theme has the background set to some image that is to be shown during startup, and in onCreate() you programmatically set the background to whatever you really want. Then the preview window that is shown for the activity has your starting background. With careful use of padding in a 9-patch, you can easily do centering of a logo... or use other drawables for some more complicated effects. The down-side to this is that the preview window is currently only shown when launching an activity as a new task (such as from home); if your activity is launched from another activity in the same task, it won't be shown. But if your activity is being used that way you should even more work on optimizing its startup, since this is really going to be annoying for users. Speaking of which there should be NO need to do more than a few seconds of work on the main UI thread (and really our goal should be to keep this work 1 second). If you are taking long enough that you actually need to show the user a loading please wait image, you are also probably flirting dangeriously close to ANRing on the user. On Mon, May 4, 2009 at 2:34 PM, Marco Nelissen marc...@android.com wrote: Why not set your content view to be an ImageView with the desired image, and then once you're ready to show the real UI, call setContentView() again with the real UI? On Mon, May 4, 2009 at 2:22 PM, GiladH gila...@gmail.com wrote: Tnx but that is not what I'm looking for. I basically want to display an image (packed within form/view/ whatever) WITHOUT blocking the UI thread, Can this be done? On May 4, 8:16 pm, Jeff Sharkey jshar...@android.com wrote: Take a peek at AsyncTask, it can help you easily (and correctly) transition between UI and background threads: http://d.android.com/reference/android/os/AsyncTask.html j On Mon, May 4, 2009 at 10:02 AM,GiladHgila...@gmail.com wrote: Hey, I want to display a fancy 'loading' image at my app's startup time. The problem: my startup code is mostly GUI related, hence needs to run on UI thread. Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user? GiladH -- Jeff Sharkey jshar...@google.com -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Displaying a now loading image while applic is, well, loading
More detail on this technique here: http://android-developers.blogspot.com/2009/03/window-backgrounds-ui-speed.html On Mon, May 4, 2009 at 3:39 PM, Dianne Hackborn hack...@android.com wrote: You can also do the trick maps does, where your activity's theme has the background set to some image that is to be shown during startup, and in onCreate() you programmatically set the background to whatever you really want. Then the preview window that is shown for the activity has your starting background. With careful use of padding in a 9-patch, you can easily do centering of a logo... or use other drawables for some more complicated effects. The down-side to this is that the preview window is currently only shown when launching an activity as a new task (such as from home); if your activity is launched from another activity in the same task, it won't be shown. But if your activity is being used that way you should even more work on optimizing its startup, since this is really going to be annoying for users. Speaking of which there should be NO need to do more than a few seconds of work on the main UI thread (and really our goal should be to keep this work 1 second). If you are taking long enough that you actually need to show the user a loading please wait image, you are also probably flirting dangeriously close to ANRing on the user. On Mon, May 4, 2009 at 2:34 PM, Marco Nelissen marc...@android.com wrote: Why not set your content view to be an ImageView with the desired image, and then once you're ready to show the real UI, call setContentView() again with the real UI? On Mon, May 4, 2009 at 2:22 PM, GiladH gila...@gmail.com wrote: Tnx but that is not what I'm looking for. I basically want to display an image (packed within form/view/ whatever) WITHOUT blocking the UI thread, Can this be done? On May 4, 8:16 pm, Jeff Sharkey jshar...@android.com wrote: Take a peek at AsyncTask, it can help you easily (and correctly) transition between UI and background threads: http://d.android.com/reference/android/os/AsyncTask.html j On Mon, May 4, 2009 at 10:02 AM,GiladHgila...@gmail.com wrote: Hey, I want to display a fancy 'loading' image at my app's startup time. The problem: my startup code is mostly GUI related, hence needs to run on UI thread. Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user? GiladH -- Jeff Sharkey jshar...@google.com -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- Romain Guy Android framework engineer romain...@android.com Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
