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2014/10/16 ¤W¤È 08:14:10
android Programming Glossary: getinstanceHow to create XMPP chat client for facebook? http://stackoverflow.com/questions/11045241/how-to-create-xmpp-chat-client-for-facebook FACEBOOK_MECHANISM 0 public static FacebookChatManager getInstance RosterListener rosterListner if chatManager null chatManager.. facebookChatManager FacebookChatManager.getInstance rosterListner if facebookChatManager.connect if facebookChatManager.logIn..
Android : Check whether the phone is dual SIM http://stackoverflow.com/questions/14517338/android-check-whether-the-phone-is-dual-sim TelephonyInfo telephonyInfo TelephonyInfo.getInstance this String imeiSIM1 telephonyInfo.getImeiSIM1 String imeiSIM2.. null private TelephonyInfo public static TelephonyInfo getInstance Context context if telephonyInfo null telephonyInfo new TelephonyInfo..
How to have Android Service communicate with Activity http://stackoverflow.com/questions/2463175/how-to-have-android-service-communicate-with-activity Intent i sInstance this Make a static function MyService getInstance which returns the static sInstance . Then in Activity.onCreate..
Using static variables in Android http://stackoverflow.com/questions/2475978/using-static-variables-in-android I usually do private static A the_instance public static A getInstance if the_instance null the_instance new A return the_instance..
Google Analytics in Android app - dealing with multiple activities http://stackoverflow.com/questions/3216692/google-analytics-in-android-app-dealing-with-multiple-activities my activities I am calling tracker GoogleAnalyticsTracker.getInstance tracker.start UA xxxxxxxxx this And in the onDestroy of all.. that uses google analytics GoogleAnalyticsSessionManager.getInstance getApplication .incrementActivityCount @Override protected void.. of how to track a pageview event GoogleAnalyticsTracker.getInstance .trackPageView getClass .getSimpleName @Override protected..
Singletons vs. Application Context in Android? http://stackoverflow.com/questions/3826905/singletons-vs-application-context-in-android effects which may suddenly surface when moving calls to getInstance from one scope to another . Visibility has been mentioned as..
Android - What's the best way to share data between activities? http://stackoverflow.com/questions/4878159/android-whats-the-best-way-to-share-data-between-activities DataHolder holder new DataHolder public static DataHolder getInstance return holder From the launched activity String data DataHolder.getInstance.. holder From the launched activity String data DataHolder.getInstance .getData Use application singleton The application singleton.. Before launching the activity DataHolder.getInstance .save someId someObject From the launched activity DataHolder.getInstance..
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 context this.context context public static RootFactory getInstance return instance public LanguageSupport getLanguageSupport return.. or Service is started. Now here is the problem the getInstance method sometimes comes back as null even when invoked 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..
Out of memory exception due to large bitmap size http://stackoverflow.com/questions/5321579/out-of-memory-exception-due-to-large-bitmap-size DrawableManager _instance static public DrawableManager getInstance if _instance null _instance new DrawableManager return _instance.. DrawableManager _instance static public DrawableManager getInstance if _instance null _instance new DrawableManager return _instance..
Accessing Resources without a Context http://stackoverflow.com/questions/5574506/accessing-resources-without-a-context Therefore having to pass in a Context every time getInstance is called would be a complete waste. Also this is specific to..
Using Singleton design pattern for SQLiteDatabase http://stackoverflow.com/questions/6905524/using-singleton-design-pattern-for-sqlitedatabase 1 private Context mCxt public static DatabaseHelper getInstance Context ctx use the application context as suggested by CommonsWare... direct instantiation. make call to static factory method getInstance instead. private DatabaseHelper Context ctx super context DATABASE_NAME..
http://stackoverflow.com/questions/8267928/android-rest-client-sample public class HypotheticalApi public static HypotheticalApi getInstance Choose an appropriate creation strategy. Request a User Profile.. Activity or Service HypotheticalApi myApi HypotheticalApi.getInstance myApi.getUserProfile techie.curious new GetResponseCallback..
how to retrive Registration id and send message to third-party application in android c2dm0+ http://stackoverflow.com/questions/9033213/how-to-retrive-registration-id-and-send-message-to-third-party-application-in-an RegistrationIDRegistrar registrar RegistrationIDRegistrar.getInstance private static final String EXTRA_ERROR error private static.. registrationId static RegistrationIDRegistrar getInstance return new RegistrationIDRegistrar MASHMOBILE_C2DM_SERVER_URL.. with it return auth_key static RegistrationIDRegistrar getInstance return new RegistrationIDRegistrar MASHMOBILE_C2DM_SERVER_URL..
How to create XMPP chat client for facebook? http://stackoverflow.com/questions/11045241/how-to-create-xmpp-chat-client-for-facebook SASLAuthentication.supportSASLMechanism FACEBOOK_MECHANISM 0 public static FacebookChatManager getInstance RosterListener rosterListner if chatManager null chatManager new FacebookChatManager rosterListner return chatManager public.. about your friends state change implement one as you want FacebookChatManager facebookChatManager FacebookChatManager.getInstance rosterListner if facebookChatManager.connect if facebookChatManager.logIn FacebookActivity.APP_ID access_token return..
Android : Check whether the phone is dual SIM http://stackoverflow.com/questions/14517338/android-check-whether-the-phone-is-dual-sim super.onCreate savedInstanceState setContentView R.layout.activity_main TelephonyInfo telephonyInfo TelephonyInfo.getInstance this String imeiSIM1 telephonyInfo.getImeiSIM1 String imeiSIM2 telephonyInfo.getImeiSIM2 boolean isSIM1Ready telephonyInfo.isSIM1Ready.. isSIM2Ready public boolean isDualSIM return imeiSIM2 null private TelephonyInfo public static TelephonyInfo getInstance Context context if telephonyInfo null telephonyInfo new TelephonyInfo TelephonyManager telephonyManager TelephonyManager..
How to have Android Service communicate with Activity http://stackoverflow.com/questions/2463175/how-to-have-android-service-communicate-with-activity the service it self and populate it in onCreate void onCreate Intent i sInstance this Make a static function MyService getInstance which returns the static sInstance . Then in Activity.onCreate you start the service asynchronously wait until the service..
Using static variables in Android http://stackoverflow.com/questions/2475978/using-static-variables-in-android practice E.g implementing a Singleton pattern in Java I usually do private static A the_instance public static A getInstance if the_instance null the_instance new A return the_instance Also when does this get cleaned up by the Android JVM Thank..
Google Analytics in Android app - dealing with multiple activities http://stackoverflow.com/questions/3216692/google-analytics-in-android-app-dealing-with-multiple-activities Activities in my app. Right now in the onCreate of all of my activities I am calling tracker GoogleAnalyticsTracker.getInstance tracker.start UA xxxxxxxxx this And in the onDestroy of all of my activities tracker.stop I then track PageViews and Events.. savedInstanceState Need to do this for every activity that uses google analytics GoogleAnalyticsSessionManager.getInstance getApplication .incrementActivityCount @Override protected void onResume super.onResume Example of how to track a pageview.. @Override protected void onResume super.onResume Example of how to track a pageview event GoogleAnalyticsTracker.getInstance .trackPageView getClass .getSimpleName @Override protected void onDestroy super.onDestroy Purge analytics so they don't..
Singletons vs. Application Context in Android? http://stackoverflow.com/questions/3826905/singletons-vs-application-context-in-android will introduce state indeterminism with subtle side effects which may suddenly surface when moving calls to getInstance from one scope to another . Visibility has been mentioned as another problem and since singletons imply global random access..
Android - What's the best way to share data between activities? http://stackoverflow.com/questions/4878159/android-whats-the-best-way-to-share-data-between-activities void setData String data this.data data private static final DataHolder holder new DataHolder public static DataHolder getInstance return holder From the launched activity String data DataHolder.getInstance .getData Use application singleton The application.. new DataHolder public static DataHolder getInstance return holder From the launched activity String data DataHolder.getInstance .getData Use application singleton The application singleton is an instance of android.app.Application which is created.. Object objectWeakReference data.get id return objectWeakReference.get Before launching the activity DataHolder.getInstance .save someId someObject From the launched activity DataHolder.getInstance .retrieve someId You may or may not have to pass..
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 RootFactory context return instance private RootFactory Context context this.context context public static RootFactory getInstance return instance public LanguageSupport getLanguageSupport return languageSupport public void setLanguageSupport LanguageSupport.. is called once in Application.onCreate i.e. before any Activity or Service is started. Now here is the problem the getInstance method sometimes comes back as null even when invoked on the same thread That sounds like it isn't a visibility problem.. I write it from the instrumentation 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..
Out of memory exception due to large bitmap size http://stackoverflow.com/questions/5321579/out-of-memory-exception-due-to-large-bitmap-size private DrawableManager drawableMap new HashMap static private DrawableManager _instance static public DrawableManager getInstance if _instance null _instance new DrawableManager return _instance public Bitmap fetchBitmap final String sURL if sURL.length.. new HashMap String SoftReference Bitmap static private DrawableManager _instance static public DrawableManager getInstance if _instance null _instance new DrawableManager return _instance public Bitmap fetchBitmap final String sURL if sURL.length..
Accessing Resources without a Context http://stackoverflow.com/questions/5574506/accessing-resources-without-a-context anything from resources besides that one time during instantiation. Therefore having to pass in a Context every time getInstance is called would be a complete waste. Also this is specific to the App's configuration and should not be in stored in a shared..
Using Singleton design pattern for SQLiteDatabase http://stackoverflow.com/questions/6905524/using-singleton-design-pattern-for-sqlitedatabase DATABASE_TABLE tableName private static final int DATABASE_VERSION 1 private Context mCxt public static DatabaseHelper getInstance Context ctx use the application context as suggested by CommonsWare. this will ensure that you dont accidentally leak an.. return mInstance constructor should be private to prevent direct instantiation. make call to static factory method getInstance instead. private DatabaseHelper Context ctx super context DATABASE_NAME null DATABASE_VERSION this.mCtx ctx Approach #2..
http://stackoverflow.com/questions/8267928/android-rest-client-sample top layer might look like this Entry point into the API. public class HypotheticalApi public static HypotheticalApi getInstance Choose an appropriate creation strategy. Request a User Profile from the REST server. @param userName The user name for.. String result Here's how an app might use the API in an Activity or Service HypotheticalApi myApi HypotheticalApi.getInstance myApi.getUserProfile techie.curious new GetResponseCallback @Override void onDataReceived Profile profile Use the profile..
how to retrive Registration id and send message to third-party application in android c2dm0+ http://stackoverflow.com/questions/9033213/how-to-retrive-registration-id-and-send-message-to-third-party-application-in-an final String EXTRA_UNREGISTERED unregistered private final RegistrationIDRegistrar registrar RegistrationIDRegistrar.getInstance private static final String EXTRA_ERROR error private static final String EXTRA_REGISTRATION_ID registration_id public RegistrationIDReceiver.. REGISTER_NEW_DEVICE NODE_ID_PARAMETER nodeId REGISTRATION_IS_PARAMETER registrationId static RegistrationIDRegistrar getInstance return new RegistrationIDRegistrar MASHMOBILE_C2DM_SERVER_URL and at last use manifest file xml version 1.0 encoding utf..
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