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2014/10/16 ¤W¤È 08:27:08
android Programming Glossary: usuallyAndroid - what's the difference between the various methods to get a Context? http://stackoverflow.com/questions/1026973/android-whats-the-difference-between-the-various-methods-to-get-a-context contexts as well In a regular Android application you usually have two kinds of Context Activity and Application. Reading..
How to avoid reverse engineering of an APK file? http://stackoverflow.com/questions/13854425/how-to-avoid-reverse-engineering-of-an-apk-file For example use obfuscation if it's Java code . This usually slows down reverse engineering significantly. 3. Is there a..
Saving Activity state in Android http://stackoverflow.com/questions/151777/saving-activity-state-in-android myString savedInstanceState.getString MyString You'd usually use this technique to store instance values for your application..
ClassNotFoundException after ADT update http://stackoverflow.com/questions/16610190/classnotfoundexception-after-adt-update that the new APK file is called myapp 1.apk while it was usually called myapp.apk . Can someone tell me how to fix android eclipse..
How to maintain multi layers of ImageViews and keep their aspect ratio based on the largest one? http://stackoverflow.com/questions/16729169/how-to-maintain-multi-layers-of-imageviews-and-keep-their-aspect-ratio-based-on and some might even be draggable. the largest one which usually takes the whole screen would be the bottom in the Z coordinate..
HTML5 <video> element on Android http://stackoverflow.com/questions/1711078/html5-video-element-on-android on Handbrake with the 'Web Optimized' button checked usually does the trick. Have a look at the demo on this page http broken..
Close application and launch home screen on Android http://stackoverflow.com/questions/2042222/close-application-and-launch-home-screen-on-android
Overriding the Home button - how do I get rid of the choice? http://stackoverflow.com/questions/2079691/overriding-the-home-button-how-do-i-get-rid-of-the-choice never get the question if I want to use Start or TouchFlo usually. However when I added my own Activity I always get the question...
How to close Android application? http://stackoverflow.com/questions/2092951/how-to-close-android-application per its documentation. In the last Activity that is exited usually the main Activity that first came up when the application started..
How to scale an Image in ImageView to keep the aspect ratio http://stackoverflow.com/questions/2521959/how-to-scale-an-image-in-imageview-to-keep-the-aspect-ratio
More efficient way of updating UI from Service than intents? http://stackoverflow.com/questions/2621395/more-efficient-way-of-updating-ui-from-service-than-intents android intent share improve this question I usually subclass Application and let my in app communication go through..
How do I get the logfile from an Android device? http://stackoverflow.com/questions/2882253/how-do-i-get-the-logfile-from-an-android-device it first. When I want to get the logfile to send by mail I usually do the following connect the device to the pc. Check that I..
How to Read MMS Data in Android? http://stackoverflow.com/questions/3012287/how-to-read-mms-data-in-android contentResolver.query uri projection null null null Note usually when you call query and want to return all columns you can pass.. It could contain different parts of text... but usually it'd be only one. So if you want to remove the loop it will..
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 true The AsyncTask will look like this usually subclasses of AsyncTask are declared inside the activity class...
How to center progress indicator in ProgressDialog easily (when no title/text passed along) http://stackoverflow.com/questions/3225889/how-to-center-progress-indicator-in-progressdialog-easily-when-no-title-text-pa progressDialog ProgressDialog.show this null null true usually the developers wants to only show the progress indication image.. wants to only show the progress indication image and usually would it expect to be centered within the window at least from..
Android: out of memory exception in Gallery http://stackoverflow.com/questions/3238388/android-out-of-memory-exception-in-gallery and height in px . The bitmaps consume native heap which usually doesn't show in a hprof. The hprof should only show you the..
Android Drawing Separator/Divider Line in Layout? http://stackoverflow.com/questions/5049852/android-drawing-separator-divider-line-in-layout android layout draw share improve this question I usually use this code to add horizontal line View android layout_width..
Android java.lang.VerifyError? http://stackoverflow.com/questions/668788/android-java-lang-verifyerror my app except for once when I included Apache Log4j. I usually get around this by taking the source of the library and adding..
Switching fragments within tab http://stackoverflow.com/questions/10502786/switching-fragments-within-tab ft User selected the already selected tab. Usually do nothing. And StationsFragment RouteFragment and DelaysFragment.. ft User selected the already selected tab. Usually do nothing. In the onTabUnselected method I now first retrieve..
Difference between getContext() , getApplicationContext() , getBaseContext() and “this” http://stackoverflow.com/questions/10641144/difference-between-getcontext-getapplicationcontext-getbasecontext-and Returns the context the view is currently running in. Usually the currently active Activity. Activity.getApplicationContext..
Android Activity ClassNotFoundException - tried everything http://stackoverflow.com/questions/10866431/android-activity-classnotfoundexception-tried-everything 2577 06 02 18 22 35.529 E AndroidRuntime 586 ... 11 more Usually this means that the manifest file is wrong in some way but I've..
Bind service to activity in Android http://stackoverflow.com/questions/1916253/bind-service-to-activity-in-android the client retains a reference on the Service's IBinder . Usually the IBinder returned is for a complex interface that has been..
Quitting an application - is that frowned upon? http://stackoverflow.com/questions/2033914/quitting-an-application-is-that-frowned-upon many iPhone and Android applications that deal with this. Usually it is because they hold onto logon credentials rather than forcing..
How can I avoid garbage collection delays in Java games? (Best Practices) [closed] http://stackoverflow.com/questions/2484079/how-can-i-avoid-garbage-collection-delays-in-java-games-best-practices hiccup in drawing and interaction for garbage collection. Usually it's less than one tenth of a second but sometimes it can be..
How to Read MMS Data in Android? http://stackoverflow.com/questions/3012287/how-to-read-mms-data-in-android whose ID is xxx . How to differentiate between SMS and MMS Usually you will want to know which type of message you are handling...
Android how to create file in Phone memory http://stackoverflow.com/questions/3288367/android-how-to-create-file-in-phone-memory possessing the correct access rights for your application. Usually you will use the method Context.getDir example MODE_PRIVATE..
How to use multiple MapActivities/MapViews per Android application/process http://stackoverflow.com/questions/3379575/how-to-use-multiple-mapactivities-mapviews-per-android-application-process some issues when using multiple mapviews in one process. Usually this is the case your app running in one process if you don't..
how to scan barcode using phonegap http://stackoverflow.com/questions/3888396/how-to-scan-barcode-using-phonegap
onSaveInstanceState () and onRestoreInstanceState () http://stackoverflow.com/questions/4096169/onsaveinstancestate-and-onrestoreinstancestate is android activity states share improve this question Usually you restore your state in onCreate . It is possible to restore..
Tiled drawable sometimes stretches http://stackoverflow.com/questions/4336286/tiled-drawable-sometimes-stretches android android src @drawable tile android tileMode repeat Usually this works. Sometimes however the src drawable isn't tiled but..
How do I launch the Android emulator from the command line? http://stackoverflow.com/questions/4974568/how-do-i-launch-the-android-emulator-from-the-command-line . Now you have to install the application to your AVD. Usually during development you just use the same Ant script you used..
Tips for optimizing a website for Android's browser? http://stackoverflow.com/questions/548892/tips-for-optimizing-a-website-for-androids-browser Android and iPhone Meta tags HandheldFriendly and viewport Usually I want pages not to have a page width of 800 to 900 pixels as..
Using Android to submit to a Google Spreadsheet Form http://stackoverflow.com/questions/6174962/using-android-to-submit-to-a-google-spreadsheet-form Spreadsheet Form First time asking a question here. Usually I can find my answer without having to ask but this time I'm..
Android: How To: display a map (still image file) with a moving current location pointer http://stackoverflow.com/questions/7062115/android-how-to-display-a-map-still-image-file-with-a-moving-current-location anchor points that coorespond to a real life lat long. Usually its 0 0 and width height of a rectangular image. Make your life..
Android: sound API (deterministic, low latency) http://stackoverflow.com/questions/7266298/android-sound-api-deterministic-low-latency sound_samples and actual sound played from the speakers. Usually it is around 300 ms. The problem is that on all devices it's..
ProgressDialog not shown when AsyncTask.get() called [duplicate] http://stackoverflow.com/questions/9019249/progressdialog-not-shown-when-asynctask-get-called UI thread waiting for the result. Solution Don't call get Usually you will call a function callback in the postExecute . share..
Android - what's the difference between the various methods to get a Context? http://stackoverflow.com/questions/1026973/android-whats-the-difference-between-the-various-methods-to-get-a-context address memory leaks but provides some good information about contexts as well In a regular Android application you usually have two kinds of Context Activity and Application. Reading the article a little bit further tells about the difference..
How to avoid reverse engineering of an APK file? http://stackoverflow.com/questions/13854425/how-to-avoid-reverse-engineering-of-an-apk-file way You can do different tricks to make hacking harder though. For example use obfuscation if it's Java code . This usually slows down reverse engineering significantly. 3. Is there a way to make hacking more tough or even impossible What more..
Saving Activity state in Android http://stackoverflow.com/questions/151777/saving-activity-state-in-android myDouble int myInt savedInstanceState.getInt MyInt String myString savedInstanceState.getString MyString You'd usually use this technique to store instance values for your application selections unsaved text etc. . share improve this answer..
ClassNotFoundException after ADT update http://stackoverflow.com/questions/16610190/classnotfoundexception-after-adt-update 05 17 13 09 56.357 E AndroidRuntime 969 ... 11 more I noticed that the new APK file is called myapp 1.apk while it was usually called myapp.apk . Can someone tell me how to fix android eclipse adt share improve this question Try going to Project..
How to maintain multi layers of ImageViews and keep their aspect ratio based on the largest one? http://stackoverflow.com/questions/16729169/how-to-maintain-multi-layers-of-imageviews-and-keep-their-aspect-ratio-based-on of the other some might have some kind of animation appearing and some might even be draggable. the largest one which usually takes the whole screen would be the bottom in the Z coordinate let's call it the backgroundImageView while all of the rest..
HTML5 <video> element on Android http://stackoverflow.com/questions/1711078/html5-video-element-on-android encoded to some quite strict parameters using the iPhone setting on Handbrake with the 'Web Optimized' button checked usually does the trick. Have a look at the demo on this page http broken links.com tests video This works AFAIK in all video enabled..
Close application and launch home screen on Android http://stackoverflow.com/questions/2042222/close-application-and-launch-home-screen-on-android
Overriding the Home button - how do I get rid of the choice? http://stackoverflow.com/questions/2079691/overriding-the-home-button-how-do-i-get-rid-of-the-choice Touch Flo Sense override the default start Activity and I never get the question if I want to use Start or TouchFlo usually. However when I added my own Activity I always get the question. Yes I know that I can check the Use this as standard checkbox..
How to close Android application? http://stackoverflow.com/questions/2092951/how-to-close-android-application has a mechanism in place to close an application safely per its documentation. In the last Activity that is exited usually the main Activity that first came up when the application started just place a couple of lines in the onDestroy method...
How to scale an Image in ImageView to keep the aspect ratio http://stackoverflow.com/questions/2521959/how-to-scale-an-image-in-imageview-to-keep-the-aspect-ratio
More efficient way of updating UI from Service than intents? http://stackoverflow.com/questions/2621395/more-efficient-way-of-updating-ui-from-service-than-intents they be implemented android user interface service performance android intent share improve this question I usually subclass Application and let my in app communication go through this class or have a mediator owned by the Application do..
How do I get the logfile from an Android device? http://stackoverflow.com/questions/2882253/how-do-i-get-the-logfile-from-an-android-device Logcollector is a good option but you need to install it first. When I want to get the logfile to send by mail I usually do the following connect the device to the pc. Check that I already setup my os for that particular device . Open a terminal..
How to Read MMS Data in Android? http://stackoverflow.com/questions/3012287/how-to-read-mms-data-in-android Uri uri Uri.parse content mms sms conversations Cursor query contentResolver.query uri projection null null null Note usually when you call query and want to return all columns you can pass null as the projection parameter. However you cannot do.. cursor.getString cursor.getColumnIndex text while cursor.moveToNext It could contain different parts of text... but usually it'd be only one. So if you want to remove the loop it will work most of the times. This is how the getMmsText method looks..
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 @Override public void onCancel DialogInterface dialog downloadTask.cancel true The AsyncTask will look like this usually subclasses of AsyncTask are declared inside the activity class. that way you can easily modify the UI thread from here private..
How to center progress indicator in ProgressDialog easily (when no title/text passed along) http://stackoverflow.com/questions/3225889/how-to-center-progress-indicator-in-progressdialog-easily-when-no-title-text-pa easily when no title text passed along When calling progressDialog ProgressDialog.show this null null true usually the developers wants to only show the progress indication image and usually would it expect to be centered within the window.. ProgressDialog.show this null null true usually the developers wants to only show the progress indication image and usually would it expect to be centered within the window at least from regular UI design point of view . But the image is too far..
Android: out of memory exception in Gallery http://stackoverflow.com/questions/3238388/android-out-of-memory-exception-in-gallery width height 4 bytes per image for regular ARGB images. width and height in px . The bitmaps consume native heap which usually doesn't show in a hprof. The hprof should only show you the number of objects i.e. BitmapDrawables or Bitmaps that are left...
Android Drawing Separator/Divider Line in Layout? http://stackoverflow.com/questions/5049852/android-drawing-separator-divider-line-in-layout it. And I want it to be relatively positioned as well. Thanks android layout draw share improve this question I usually use this code to add horizontal line View android layout_width fill_parent android layout_height 1dp android background..
Android java.lang.VerifyError? http://stackoverflow.com/questions/668788/android-java-lang-verifyerror a external JAR I always get VerifyErrors when I try to launch my app except for once when I included Apache Log4j. I usually get around this by taking the source of the library and adding it to my project but I am trying to put the GData client..
Switching fragments within tab http://stackoverflow.com/questions/10502786/switching-fragments-within-tab mFragment public void onTabReselected Tab tab FragmentTransaction ft User selected the already selected tab. Usually do nothing. And StationsFragment RouteFragment and DelaysFragment are the same with only different text public class StationsFragment.. mFragment public void onTabReselected Tab tab FragmentTransaction ft User selected the already selected tab. Usually do nothing. In the onTabUnselected method I now first retrieve the correct Fragment then detach it. Hope this helps someone..
Difference between getContext() , getApplicationContext() , getBaseContext() and “this” http://stackoverflow.com/questions/10641144/difference-between-getcontext-getapplicationcontext-getbasecontext-and android context share improve this question View.getContext Returns the context the view is currently running in. Usually the currently active Activity. Activity.getApplicationContext Returns the context for the entire application the process..
Android Activity ClassNotFoundException - tried everything http://stackoverflow.com/questions/10866431/android-activity-classnotfoundexception-tried-everything ActivityThread.java 2577 06 02 18 22 35.529 E AndroidRuntime 586 ... 11 more Usually this means that the manifest file is wrong in some way but I've double checked everything I can think of. Here is my activity..
Bind service to activity in Android http://stackoverflow.com/questions/1916253/bind-service-to-activity-in-android as long as the connection is established whether or not the client retains a reference on the Service's IBinder . Usually the IBinder returned is for a complex interface that has been written in AIDL. A service can be both started and have connections..
Quitting an application - is that frowned upon? http://stackoverflow.com/questions/2033914/quitting-an-application-is-that-frowned-upon a phonecall and Android decides to kill the app. There are many iPhone and Android applications that deal with this. Usually it is because they hold onto logon credentials rather than forcing users to log in every time manually. For example we want..
How can I avoid garbage collection delays in Java games? (Best Practices) [closed] http://stackoverflow.com/questions/2484079/how-can-i-avoid-garbage-collection-delays-in-java-games-best-practices in Java for the Android platform. Once in a while there is a hiccup in drawing and interaction for garbage collection. Usually it's less than one tenth of a second but sometimes it can be as large as 200ms on very slow devices. I am using the ddms..
How to Read MMS Data in Android? http://stackoverflow.com/questions/3012287/how-to-read-mms-data-in-android xxx it will return each SMS and or MMS on the conversation whose ID is xxx . How to differentiate between SMS and MMS Usually you will want to know which type of message you are handling. Documentation says A virtual column MmsSms.TYPE_DISCRIMINATOR_COLUMN..
Android how to create file in Phone memory http://stackoverflow.com/questions/3288367/android-how-to-create-file-in-phone-memory question You should only have access to the directories possessing the correct access rights for your application. Usually you will use the method Context.getDir example MODE_PRIVATE to get a writeable directory on the phone memory. It creates..
How to use multiple MapActivities/MapViews per Android application/process http://stackoverflow.com/questions/3379575/how-to-use-multiple-mapactivities-mapviews-per-android-application-process class it's per process. It's known that you might experience some issues when using multiple mapviews in one process. Usually this is the case your app running in one process if you don't configure anything specific. You could though use the android..
how to scan barcode using phonegap http://stackoverflow.com/questions/3888396/how-to-scan-barcode-using-phonegap
onSaveInstanceState () and onRestoreInstanceState () http://stackoverflow.com/questions/4096169/onsaveinstancestate-and-onrestoreinstancestate method. Can anyone explain to me why this is android activity states share improve this question Usually you restore your state in onCreate . It is possible to restore it in onRestoreInstanceState as well but not very common...
Tiled drawable sometimes stretches http://stackoverflow.com/questions/4336286/tiled-drawable-sometimes-stretches xml bitmap xmlns android http schemas.android.com apk res android android src @drawable tile android tileMode repeat Usually this works. Sometimes however the src drawable isn't tiled but stretched to fill the entire list item. I've got several..
How do I launch the Android emulator from the command line? http://stackoverflow.com/questions/4974568/how-do-i-launch-the-android-emulator-from-the-command-line it takes some time. You can read about additional options here . Now you have to install the application to your AVD. Usually during development you just use the same Ant script you used to build the project just select install target. However you..
Tips for optimizing a website for Android's browser? http://stackoverflow.com/questions/548892/tips-for-optimizing-a-website-for-androids-browser to optimize websites for mobile browsers especially Android and iPhone Meta tags HandheldFriendly and viewport Usually I want pages not to have a page width of 800 to 900 pixels as the Android and iPhone browsers set it to by default. To have..
Using Android to submit to a Google Spreadsheet Form http://stackoverflow.com/questions/6174962/using-android-to-submit-to-a-google-spreadsheet-form Android to submit to a Google Spreadsheet Form First time asking a question here. Usually I can find my answer without having to ask but this time I'm stuck and can't figure out what I'm missing. I'm just trying..
Android: How To: display a map (still image file) with a moving current location pointer http://stackoverflow.com/questions/7062115/android-how-to-display-a-map-still-image-file-with-a-moving-current-location To associate the indicator to the image make two pixels into anchor points that coorespond to a real life lat long. Usually its 0 0 and width height of a rectangular image. Make your life easier and make sure the images are to scale. Then using..
Android: sound API (deterministic, low latency) http://stackoverflow.com/questions/7266298/android-sound-api-deterministic-low-latency is that there is significant delay between sound_out.write sound_samples and actual sound played from the speakers. Usually it is around 300 ms. The problem is that on all devices it's different some don't have that problem but most are crippled..
ProgressDialog not shown when AsyncTask.get() called [duplicate] http://stackoverflow.com/questions/9019249/progressdialog-not-shown-when-asynctask-get-called
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