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2014/10/16 ¤W¤È 08:19:03
android Programming Glossary: meanAndroid ViewPager - can't update dynamically http://stackoverflow.com/questions/10849552/android-viewpager-cant-update-dynamically default getItemPosition returns POSITION_UNCHANGED which means This object is fine where it is don't destroy or remove it... FragmentPagerAdapter doesn't destroy a fragment doesn't mean that getItemPosition is completely useless in a FragmentPagerAdapter...
How to change an application icon programmatically in Android? http://stackoverflow.com/questions/1103027/how-to-change-an-application-icon-programmatically-in-android to change an application icon directly from the program I mean change icon.png in the res drawable folder. I would like to..
This Handler class should be static or leaks might occur: IncomingHandler http://stackoverflow.com/questions/11407943/this-handler-class-should-be-static-or-leaks-might-occur-incominghandler static or leaks might occur IncomingHandler What does it mean android memory leaks static classes android lint android handler..
Inner class can access but not update values - AsyncTask http://stackoverflow.com/questions/18517400/inner-class-can-access-but-not-update-values-asynctask in a thread separate from the main UI thread. Does that mean that any values updated in the new thread will be lost once.. updated. This SO answer covers how to do this Does that mean that any values updated in the new thread will be lost once..
How to send an object from one Android Activity to another using Intents? http://stackoverflow.com/questions/2139134/how-to-send-an-object-from-one-android-activity-to-another-using-intents Java's native serialization but it's way faster and I mean way WAY faster . From the docs a simple example for how to implement..
How to discover memory usage of my application in Android http://stackoverflow.com/questions/2298208/how-to-discover-memory-usage-of-my-application-in-android there is always a long discussion about what they actually mean that only results in a vague conclusion. Note we now have much..
getting the screen density programmatically in android? http://stackoverflow.com/questions/3166501/getting-the-screen-density-programmatically-in-android to get the screen density programmatically in android I mean How to find the screen dpi of the current device android ..
Android, Detect when other apps are launched http://stackoverflow.com/questions/3290936/android-detect-when-other-apps-are-launched i found this permission android.permission.READ_LOGS that mean all of them use it. but it seems the program starts and after..
Is AsyncTask really conceptually flawed or am I just missing something? http://stackoverflow.com/questions/3357477/is-asynctask-really-conceptually-flawed-or-am-i-just-missing-something you don't have access to any context You can't do anything meaningful here. One workaround would be to not pass context instances.. between them without risking a leak right . But that would mean that the premise of AsyncTask namely that you don't need to.. destroyed you have no record of the tasks it fired. That means that you have to re start any tasks when re creating the context..
Developing cross platform mobile application [closed] http://stackoverflow.com/questions/3369413/developing-cross-platform-mobile-application the inevitable compromises of making a cross platform API mean that all the apps created by the API will be at best B grade.. never be the best tool to use on each platform. All this means that in most use cases cross platform tools give the end user..
http://stackoverflow.com/questions/3651086/android-using-custom-font So assets fonts Also make sure that the font ending I mean the ending of the font file itself is all lower case. In other..
What is the Android UiThread (UI thread) http://stackoverflow.com/questions/3652560/what-is-the-android-uithread-ui-thread to the event queue of the UI thread. Does the UI thread mean that this will be run everytime the activity is pushed the the..
Android: Is application running in background? http://stackoverflow.com/questions/3667022/android-is-application-running-in-background your application is running in background By background I mean none of the applications activities are currently visible to..
Can't create handler inside thread that has not called Looper.prepare() http://stackoverflow.com/questions/3875184/cant-create-handler-inside-thread-that-has-not-called-looper-prepare called Looper.prepare What does the following exception mean how can I fix it This is the code Toast toast Toast.makeText..
What does android:layout_weight mean? http://stackoverflow.com/questions/3995825/what-does-androidlayout-weight-mean does android layout_weight mean I don't understand how to use this attribute. Can anyone tell..
Android: Go back to previous activity http://stackoverflow.com/questions/4038479/android-go-back-to-previous-activity activity stack. Going back to a previous activity could mean two things. You opened the new activity from another activity..
'Application not Installed' Error on Android http://stackoverflow.com/questions/4226132/application-not-installed-error-on-android both apk hadn't been signed with the same certificate. I mean when I used the same certificate I was able to overwrite the..
Android Min SDK Version vs. Target SDK Version http://stackoverflow.com/questions/4568267/android-min-sdk-version-vs-target-sdk-version are not available to older applications. This does not mean that you can program different features for different versions..
Handler vs AsyncTask vs Thread http://stackoverflow.com/questions/6964011/handler-vs-asynctask-vs-thread but that is not an important point . What does it mean It means no magic in AsyncTask or Handler . They just make your.. but that is not an important point . What does it mean It means no magic in AsyncTask or Handler . They just make your job.. thread is UI Thread . 2 No need to manipulate handlers. means You can use Handler instead of AsyncTask but AsyncTask is an..
Android ViewPager - can't update dynamically http://stackoverflow.com/questions/10849552/android-viewpager-cant-update-dynamically they need to be moved to a different position or removed. By default getItemPosition returns POSITION_UNCHANGED which means This object is fine where it is don't destroy or remove it. Returning POSITION_NONE fixes the problem by instead saying.. or other AdapterView types. One last thing just because FragmentPagerAdapter doesn't destroy a fragment doesn't mean that getItemPosition is completely useless in a FragmentPagerAdapter. You can still use this callback to reorder your fragments..
How to change an application icon programmatically in Android? http://stackoverflow.com/questions/1103027/how-to-change-an-application-icon-programmatically-in-android application icon programmatically in Android Is it possible to change an application icon directly from the program I mean change icon.png in the res drawable folder. I would like to let users to change application's icon from the program so next..
This Handler class should be static or leaks might occur: IncomingHandler http://stackoverflow.com/questions/11407943/this-handler-class-should-be-static-or-leaks-might-occur-incominghandler I get the following Lint warning This Handler class should be static or leaks might occur IncomingHandler What does it mean android memory leaks static classes android lint android handler share improve this question If IncomingHandler class..
Inner class can access but not update values - AsyncTask http://stackoverflow.com/questions/18517400/inner-class-can-access-but-not-update-values-asynctask the values remain updated 2. I know that doInBackground occurs in a thread separate from the main UI thread. Does that mean that any values updated in the new thread will be lost once that thread returns java android multithreading android asynctask.. use an interface to create a callback when these values are updated. This SO answer covers how to do this Does that mean that any values updated in the new thread will be lost once that thread returns No they shouldn't be lost . They probably..
How to send an object from one Android Activity to another using Intents? http://stackoverflow.com/questions/2139134/how-to-send-an-object-from-one-android-activity-to-another-using-intents for this. It requires a little more effort to use than using Java's native serialization but it's way faster and I mean way WAY faster . From the docs a simple example for how to implement is simple class that just has one member property as..
How to discover memory usage of my application in Android http://stackoverflow.com/questions/2298208/how-to-discover-memory-usage-of-my-application-in-android time I look at memory usage numbers with other engineers there is always a long discussion about what they actually mean that only results in a vague conclusion. Note we now have much more extensive documentation on Managing Your App's Memory..
getting the screen density programmatically in android? http://stackoverflow.com/questions/3166501/getting-the-screen-density-programmatically-in-android the screen density programmatically in android How to get the screen density programmatically in android I mean How to find the screen dpi of the current device android share improve this question You can get info on the display..
Android, Detect when other apps are launched http://stackoverflow.com/questions/3290936/android-detect-when-other-apps-are-launched use logcat and analyze it's output. in all similar programs i found this permission android.permission.READ_LOGS that mean all of them use it. but it seems the program starts and after that our program app protector will start and bring front...
Is AsyncTask really conceptually flawed or am I just missing something? http://stackoverflow.com/questions/3357477/is-asynctask-really-conceptually-flawed-or-am-i-just-missing-something what good is it for this method to run on the UI thread if you don't have access to any context You can't do anything meaningful here. One workaround would be to not pass context instances to an AsyncTask but a Handler instance. That works since.. binds the context and the task you can exchange messages between them without risking a leak right . But that would mean that the premise of AsyncTask namely that you don't need to bother with handlers is wrong. It also seems like abusing Handler.. you still have the problem that when the context gets destroyed you have no record of the tasks it fired. That means that you have to re start any tasks when re creating the context e.g. after a screen orientation change. This is slow and..
Developing cross platform mobile application [closed] http://stackoverflow.com/questions/3369413/developing-cross-platform-mobile-application the fact that it does brings them no value. Conversely the inevitable compromises of making a cross platform API mean that all the apps created by the API will be at best B grade on every platform. They will never be the best tool to use.. the API will be at best B grade on every platform. They will never be the best tool to use on each platform. All this means that in most use cases cross platform tools give the end user an inferior product compared to ones made with platform specific..
http://stackoverflow.com/questions/3651086/android-using-custom-font fonts but it must go in the assets folder not the res folder. So assets fonts Also make sure that the font ending I mean the ending of the font file itself is all lower case. In other words it should not be myFont.TTF but myFont.ttf share improve..
What is the Android UiThread (UI thread) http://stackoverflow.com/questions/3652560/what-is-the-android-uithread-ui-thread the current thread is not the UI thread the action is posted to the event queue of the UI thread. Does the UI thread mean that this will be run everytime the activity is pushed the the background by some ui activity like incoming call or screen..
Android: Is application running in background? http://stackoverflow.com/questions/3667022/android-is-application-running-in-background in background Is there any way in android to know if your application is running in background By background I mean none of the applications activities are currently visible to the user Any help will be appreciated android background ..
Can't create handler inside thread that has not called Looper.prepare() http://stackoverflow.com/questions/3875184/cant-create-handler-inside-thread-that-has-not-called-looper-prepare create handler inside thread that has not called Looper.prepare What does the following exception mean how can I fix it This is the code Toast toast Toast.makeText mContext Something Toast.LENGTH_SHORT This is the exception..
What does android:layout_weight mean? http://stackoverflow.com/questions/3995825/what-does-androidlayout-weight-mean does android layout_weight mean I don't understand how to use this attribute. Can anyone tell me more about it android android layout android widget ..
Android: Go back to previous activity http://stackoverflow.com/questions/4038479/android-go-back-to-previous-activity improve this question Android activities are stored in the activity stack. Going back to a previous activity could mean two things. You opened the new activity from another activity with startActivityForResult . In that case you can just call..
'Application not Installed' Error on Android http://stackoverflow.com/questions/4226132/application-not-installed-error-on-android an apk on a phone with a previous version of the same apk and both apk hadn't been signed with the same certificate. I mean when I used the same certificate I was able to overwrite the previous instalation but when I changed of certificate between..
Android Min SDK Version vs. Target SDK Version http://stackoverflow.com/questions/4568267/android-min-sdk-version-vs-target-sdk-version to maintain forward compatibility or enable newer features that are not available to older applications. This does not mean that you can program different features for different versions of the platform ”it simply informs the platform that you have..
Handler vs AsyncTask vs Thread http://stackoverflow.com/questions/6964011/handler-vs-asynctask-vs-thread will see their code purely in Java. of course there some exceptions but that is not an important point . What does it mean It means no magic in AsyncTask or Handler . They just make your job easier as a developer. For example If Program A calls.. their code purely in Java. of course there some exceptions but that is not an important point . What does it mean It means no magic in AsyncTask or Handler . They just make your job easier as a developer. For example If Program A calls method.. on two points 1 Easy use of the UI thread so use when caller thread is UI Thread . 2 No need to manipulate handlers. means You can use Handler instead of AsyncTask but AsyncTask is an easier option . There are many things in this post I haven't..
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