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2014/10/16 ¤W¤È 08:20:52
android Programming Glossary: operationsComplete Working Sample of the Gmail Three-Fragment Animation Scenario? http://stackoverflow.com/questions/12253965/complete-working-sample-of-the-gmail-three-fragment-animation-scenario Fragment B And on a BACK button press we want that set of operations to be reversed. Now I have seen lots of partial implementations..
Bitmap recycle with largeHeap enabled http://stackoverflow.com/questions/12716574/bitmap-recycle-with-largeheap-enabled round on almost the full heap available. But when some operations needs a bit more memory the application crashes. So I enabled..
Android AsyncTask for Long Running Operations http://stackoverflow.com/questions/12797550/android-asynctask-for-long-running-operations here it says AsyncTasks should ideally be used for short operations a few seconds at the most. If you need to keep threads running.. requirement in Android and are by nature long running operations . Here is an excerpt from the app The AsyncTask and Activity.. a very very bad idea to use AsyncTasks for long running operations. Nevertheless they are fine for short living ones such as updating..
Sending and Receiving SMS and MMS in Android (pre Kit Kat Android 4.4) http://stackoverflow.com/questions/14452808/sending-and-receiving-sms-and-mms-in-android-pre-kit-kat-android-4-4 all those applications which use mobile data to perform operations like sending MMS and don't know the default APN setting present..
How do I return a boolean from AsyncTask? http://stackoverflow.com/questions/16752073/how-do-i-return-a-boolean-from-asynctask my code to use AsyncTasks to perform the various ftp operations but how can I pass back a boolean value if a connection is successfully..
Ideal way to cancel an executing AsyncTask http://stackoverflow.com/questions/2735102/ideal-way-to-cancel-an-executing-asynctask running remote audio file fetching and audio file playback operations in a background thread using AsyncTask . A Cancellable progress..
Download a file with Android, and showing the progress in a ProgressDialog http://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog you must manually spawn new threads to run CPU blocking operations . Download service can look like this public class DownloadService..
http://stackoverflow.com/questions/3132021/android-listview-illegalstateexception-the-content-of-the-adapter-has-changed My Adapter uses ArrayList of result objects all operations on those arraylists are synchronized. Research of other people..
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 to the documentation it allows to perform background operations and publish results on the UI thread without having to manipulate..
Android SQLite database: slow insertion http://stackoverflow.com/questions/3501516/android-sqlite-database-slow-insertion file takes only 23 seconds. Is it normal for the database operations to have such a big overhead Can I do anything about that android..
http://stackoverflow.com/questions/4116001/android-lock-screen-widget Lock screen interaction is difficult. Android allows basic operations with two window flags FLAG_SHOW_WHEN_LOCKED and FLAG_DISMISS_KEYGUARD..
http://stackoverflow.com/questions/4369537/update-ui-from-thread of the UI thread. This class allows to perform background operations and publish results on the UI thread without having to manipulate..
Android how to use Environment.getExternalStorageDirectory() http://stackoverflow.com/questions/5453708/android-how-to-use-environment-getexternalstoragedirectory the full path the SDCard. You can then do normal File I O operations using standard Java. Here's a simple example for writing a file..
android how to work with asynctasks progressdialog http://stackoverflow.com/questions/6450275/android-how-to-work-with-asynctasks-progressdialog is used to operate progress of asynchronous operations via this method. Note the param with datatype Integer . This..
Handler vs AsyncTask vs Thread http://stackoverflow.com/questions/6964011/handler-vs-asynctask-vs-thread of the UI thread. This class allows to perform background operations and publish results on the UI thread without having to manipulate..
Android - how do I investigate an ANR? http://stackoverflow.com/questions/704311/android-how-do-i-investigate-an-anr your code and look for vunerable spots and long running operations. Examples may include using sockets locks thread sleeps and.. using sockets locks thread sleeps and other blocking operations from within the event thread. You should make sure these all..
Complete Working Sample of the Gmail Three-Fragment Animation Scenario? http://stackoverflow.com/questions/12253965/complete-working-sample-of-the-gmail-three-fragment-animation-scenario right side of the screen and to take up the spot vacated by Fragment B And on a BACK button press we want that set of operations to be reversed. Now I have seen lots of partial implementations I'll review four of them below. Beyond being incomplete..
Bitmap recycle with largeHeap enabled http://stackoverflow.com/questions/12716574/bitmap-recycle-with-largeheap-enabled and recycling it over navigation and loading new ones works round on almost the full heap available. But when some operations needs a bit more memory the application crashes. So I enabled largeHeap true to have a bit more memory. But doing this has..
Android AsyncTask for Long Running Operations http://stackoverflow.com/questions/12797550/android-asynctask-for-long-running-operations Operations Quoting the documentation for AsyncTask found here it says AsyncTasks should ideally be used for short operations a few seconds at the most. If you need to keep threads running for long periods of time it is highly recommended you use.. for network requests RoboSpice. Network requests are a common requirement in Android and are by nature long running operations . Here is an excerpt from the app The AsyncTask and Activity life cycle AsyncTasks don't follow Activity instances' life.. for Android to preserve resources on the device. It is really a very very bad idea to use AsyncTasks for long running operations. Nevertheless they are fine for short living ones such as updating a View after 1 or 2 seconds. I encourage you to download..
Sending and Receiving SMS and MMS in Android (pre Kit Kat Android 4.4) http://stackoverflow.com/questions/14452808/sending-and-receiving-sms-and-mms-in-android-pre-kit-kat-android-4-4 you can't Read APNs in Android 4.2 What is the alternative for all those applications which use mobile data to perform operations like sending MMS and don't know the default APN setting present in the device android sms broadcastreceiver android manifest..
How do I return a boolean from AsyncTask? http://stackoverflow.com/questions/16752073/how-do-i-return-a-boolean-from-asynctask Connection Failed status Toast.LENGTH_LONG .show I'm reworking my code to use AsyncTasks to perform the various ftp operations but how can I pass back a boolean value if a connection is successfully made testConnection.setOnClickListener new OnClickListener..
Ideal way to cancel an executing AsyncTask http://stackoverflow.com/questions/2735102/ideal-way-to-cancel-an-executing-asynctask way to cancel an executing AsyncTask I am running remote audio file fetching and audio file playback operations in a background thread using AsyncTask . A Cancellable progress bar is shown for the time the fetch operation runs. I want..
Download a file with Android, and showing the progress in a ProgressDialog http://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog in the same thread of your app when you extends Service you must manually spawn new threads to run CPU blocking operations . Download service can look like this public class DownloadService extends IntentService public static final int UPDATE_PROGRESS..
http://stackoverflow.com/questions/3132021/android-listview-illegalstateexception-the-content-of-the-adapter-has-changed and publish result add entries to adapter from onProgressUpdate. My Adapter uses ArrayList of result objects all operations on those arraylists are synchronized. Research of other people there is very valuable data here . I also suffered from almost..
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 be missing something. The problem is with AsyncTask . According to the documentation it allows to perform background operations and publish results on the UI thread without having to manipulate threads and or handlers. The example then continues to..
Android SQLite database: slow insertion http://stackoverflow.com/questions/3501516/android-sqlite-database-slow-insertion everything else such as creating ContentValues etc. the same file takes only 23 seconds. Is it normal for the database operations to have such a big overhead Can I do anything about that android database performance sqlite insert share improve this..
http://stackoverflow.com/questions/4116001/android-lock-screen-widget android widget lockscreen share improve this question Lock screen interaction is difficult. Android allows basic operations with two window flags FLAG_SHOW_WHEN_LOCKED and FLAG_DISMISS_KEYGUARD . FLAG_SHOW_WHEN_LOCKED works pretty consistently..
http://stackoverflow.com/questions/4369537/update-ui-from-thread and ProgressDialog AsyncTask enables proper and easy use of the UI thread. This class allows to perform background operations and publish results on the UI thread without having to manipulate threads and or handlers. An asynchronous task is defined..
Android how to use Environment.getExternalStorageDirectory() http://stackoverflow.com/questions/5453708/android-how-to-use-environment-getexternalstoragedirectory .getAbsolutePath Gives you the full path the SDCard. You can then do normal File I O operations using standard Java. Here's a simple example for writing a file String baseDir Environment.getExternalStorageDirectory .getAbsolutePath..
android how to work with asynctasks progressdialog http://stackoverflow.com/questions/6450275/android-how-to-work-with-asynctasks-progressdialog within this android share improve this question onProgressUpdate is used to operate progress of asynchronous operations via this method. Note the param with datatype Integer . This corresponds to the second parameter in the class definition...
Handler vs AsyncTask vs Thread http://stackoverflow.com/questions/6964011/handler-vs-asynctask-vs-thread android document says AsyncTask enables proper and easy use of the UI thread. This class allows to perform background operations and publish results on the UI thread without having to manipulate threads and or handlers I want to emphasize on two points..
Android - how do I investigate an ANR? http://stackoverflow.com/questions/704311/android-how-do-i-investigate-an-anr but harder if it's just a temporary delay. First go over your code and look for vunerable spots and long running operations. Examples may include using sockets locks thread sleeps and other blocking operations from within the event thread. You.. vunerable spots and long running operations. Examples may include using sockets locks thread sleeps and other blocking operations from within the event thread. You should make sure these all happen in separate threads. If nothing seems the problem use..
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