¡@
2014/10/16 ¤W¤È 08:13:18
android Programming Glossary: expensiveListView Adapter with arbitrary number of row types (Don't know the number of different row types) http://stackoverflow.com/questions/17370525/listview-adapter-with-arbitrary-number-of-row-types-dont-know-the-number-of-di problem As I understand it layout inflation is quite expensive and I won't be able to recycle the View passed in to getView..
Android Reading from an Input stream efficiently http://stackoverflow.com/questions/2492076/android-reading-from-an-input-stream-efficiently some Kbs and creating some objects lots of times is expensive. a.append b being a a StringBuilder directly appends b contents..
Is there a way to animate on a Home Widget? http://stackoverflow.com/questions/2565023/is-there-a-way-to-animate-on-a-home-widget fast onUpdate calls on the widget but that seems awfully expensive. android share improve this question I am currently creating.. put a blog post on how to animate home widget . Yes it is expensive to do so I do it only when the widget is needed. BTW original..
How can I put a ListView into a ScrollView without it collapsing? http://stackoverflow.com/questions/3495890/how-can-i-put-a-listview-into-a-scrollview-without-it-collapsing Using a ListView to make it not scroll is extremely expensive and goes against the whole purpose of ListView. You should NOT..
http://stackoverflow.com/questions/3567312/android-drop-shadow-on-view only loaded displayed once in a while since the process is expensive. Pseudo code might even compile BlurMaskFilter blurFilter new.. you could create it and cache it in onCreate to bypass the expensive image processing. Even if that doesn't work as is it should..
How to save state during orientation change in Android if the state is made of my classes? http://stackoverflow.com/questions/3915952/how-to-save-state-during-orientation-change-in-android-if-the-state-is-made-of-m fragments are usually the best way to handle keeping expensive to recreate data alive across activity destruction creation...
Intercept back button from soft keyboard http://stackoverflow.com/questions/3940127/intercept-back-button-from-soft-keyboard case a search . @Override public void onBackPressed It's expensive if running turn it off. DataHelper.cancelSearch hideKeyboard..
Any good graphing packages for Android? [closed] http://stackoverflow.com/questions/424752/any-good-graphing-packages-for-android is in a poor connectivity situation where network usage is expensive unlocked phones in resource poor settings . java android graph..
Which one to use: onSaveInstanceState vs. onRetainNonConfigurationInstance? http://stackoverflow.com/questions/4285877/which-one-to-use-onsaveinstancestate-vs-onretainnonconfigurationinstance is a redundant callback. If my activity has really expensive initialization I am better off using onSaveInstanceState. Saved.. callback. No it is not. If my activity has really expensive initialization I am better off using onSaveInstanceState. onSaveInstanceState.. onSaveInstanceState is not designed for really expensive initialization . It is designed for hey the user made some changes..
Static references are cleared--does Android unload classes at runtime if unused? http://stackoverflow.com/questions/5105097/static-references-are-cleared-does-android-unload-classes-at-runtime-if-unused well synchronized the call to getInstance but that's more expensive since it requires claiming an object lock. See What is an efficient..
android camera surfaceview orientation http://stackoverflow.com/questions/5157984/android-camera-surfaceview-orientation it calls Camera.open ... which as you may know is quite an expensive operation causing the transitions to be not so smooth. When..
Drawing mirrored bitmaps in android http://stackoverflow.com/questions/7925278/drawing-mirrored-bitmaps-in-android share improve this question Method 2 would be way too expensive and you don't need a canvas to flip a bitmap. Simply create..
Apply custom filters to camera output http://stackoverflow.com/questions/8371055/apply-custom-filters-to-camera-output format if you want to display it. This conversion is quite expensive operation and significantly lowers the output fps. It depends.. all you have to display it manually. And you can't do any expensive operations in onPreviewFrame method beacause the lifetime of..
http://stackoverflow.com/questions/9363072/android-set-fragment-id forced to generate strings dynamically. But it's not that expensive relative to the actual FragmentTransaction anyway. Another advantage..
When to clear the cache dir in Android? http://stackoverflow.com/questions/9942560/when-to-clear-the-cache-dir-in-android size file.length return size Of course this could be an expensive operation so you should plan on caching on a background thread...
ListView Adapter with arbitrary number of row types (Don't know the number of different row types) http://stackoverflow.com/questions/17370525/listview-adapter-with-arbitrary-number-of-row-types-dont-know-the-number-of-di post. I think this would work but there might be a performance problem As I understand it layout inflation is quite expensive and I won't be able to recycle the View passed in to getView either since it might have a bunch of sections added to it..
Android Reading from an Input stream efficiently http://stackoverflow.com/questions/2492076/android-reading-from-an-input-stream-efficiently String and you are doing those copies on each iteration. Copying some Kbs and creating some objects lots of times is expensive. a.append b being a a StringBuilder directly appends b contents to a so you don't copy the accumulated String on each iteration...
Is there a way to animate on a Home Widget? http://stackoverflow.com/questions/2565023/is-there-a-way-to-animate-on-a-home-widget that I can probably do the animation on my own with very fast onUpdate calls on the widget but that seems awfully expensive. android share improve this question I am currently creating an widget that need sprite animation and I have put a.. creating an widget that need sprite animation and I have put a blog post on how to animate home widget . Yes it is expensive to do so I do it only when the widget is needed. BTW original android animation is not supported in remote views. Edit Demo..
How can I put a ListView into a ScrollView without it collapsing? http://stackoverflow.com/questions/3495890/how-can-i-put-a-listview-into-a-scrollview-without-it-collapsing height android listview scrollview share improve this question Using a ListView to make it not scroll is extremely expensive and goes against the whole purpose of ListView. You should NOT do this. Just use a LinearLayout instead. share improve..
http://stackoverflow.com/questions/3567312/android-drop-shadow-on-view need to display but that would only work if your image is only loaded displayed once in a while since the process is expensive. Pseudo code might even compile BlurMaskFilter blurFilter new BlurMaskFilter 5 BlurMaskFilter.Blur.OUTER Paint shadowPaint.. ImageView. If this image never changes but is display a lot you could create it and cache it in onCreate to bypass the expensive image processing. Even if that doesn't work as is it should be enough to get you going in the right direction. share improve..
How to save state during orientation change in Android if the state is made of my classes? http://stackoverflow.com/questions/3915952/how-to-save-state-during-orientation-change-in-android-if-the-state-is-made-of-m versions of Android and with the compatibility library retained fragments are usually the best way to handle keeping expensive to recreate data alive across activity destruction creation. And as Dianne pointed out retaining nonconfiguration data was..
Intercept back button from soft keyboard http://stackoverflow.com/questions/3940127/intercept-back-button-from-soft-keyboard also enables the enter key to execute the functionality in my case a search . @Override public void onBackPressed It's expensive if running turn it off. DataHelper.cancelSearch hideKeyboard super.onBackPressed So when the onBackPressed is called within..
Any good graphing packages for Android? [closed] http://stackoverflow.com/questions/424752/any-good-graphing-packages-for-android workaround. However our eventual expected application usage is in a poor connectivity situation where network usage is expensive unlocked phones in resource poor settings . java android graph share improve this question UPDATE Since this question..
Which one to use: onSaveInstanceState vs. onRetainNonConfigurationInstance? http://stackoverflow.com/questions/4285877/which-one-to-use-onsaveinstancestate-vs-onretainnonconfigurationinstance As far as I can see onRetainNonConfigurationInstance is a redundant callback. If my activity has really expensive initialization I am better off using onSaveInstanceState. Saved instance covers more situations than non configuration instance... As far as I can see onRetainNonConfigurationInstance is a redundant callback. No it is not. If my activity has really expensive initialization I am better off using onSaveInstanceState. onSaveInstanceState is not designed for really expensive initialization.. expensive initialization I am better off using onSaveInstanceState. onSaveInstanceState is not designed for really expensive initialization . It is designed for hey the user made some changes to the information in the activity but has not saved..
Static references are cleared--does Android unload classes at runtime if unused? http://stackoverflow.com/questions/5105097/static-references-are-cleared-does-android-unload-classes-at-runtime-if-unused thread and read it on the UI thread. I could have as well synchronized the call to getInstance but that's more expensive since it requires claiming an object lock. See What is an efficient way to implement a singleton pattern in Java for a more..
android camera surfaceview orientation http://stackoverflow.com/questions/5157984/android-camera-surfaceview-orientation p 90 However everytime the orientation changes it calls Camera.open ... which as you may know is quite an expensive operation causing the transitions to be not so smooth. When i force the orientation to landscape the preview is great. Create..
Drawing mirrored bitmaps in android http://stackoverflow.com/questions/7925278/drawing-mirrored-bitmaps-in-android to draw from. Method 3 Other better ways android bitmap share improve this question Method 2 would be way too expensive and you don't need a canvas to flip a bitmap. Simply create another bitmap with a Matrix applied like so BitmapDrawable..
Apply custom filters to camera output http://stackoverflow.com/questions/8371055/apply-custom-filters-to-camera-output in YUV format which has to be converted to some sort of RGB format if you want to display it. This conversion is quite expensive operation and significantly lowers the output fps. It depends on what you actually want to do with the camera preview. Because.. null than your camera is not displaying preview at all you have to display it manually. And you can't do any expensive operations in onPreviewFrame method beacause the lifetime of data is limited it's overwriten on the next frame. One hint..
http://stackoverflow.com/questions/9363072/android-set-fragment-id 's findFragmentByTag String method. In one of my apps I was forced to generate strings dynamically. But it's not that expensive relative to the actual FragmentTransaction anyway. Another advantage to the tag method is that it can identify a Fragment..
When to clear the cache dir in Android? http://stackoverflow.com/questions/9942560/when-to-clear-the-cache-dir-in-android files dir.listFiles for File file files if file.isFile size file.length return size Of course this could be an expensive operation so you should plan on caching on a background thread. Also this could be as complicated as you need it to be...
|