{"id":16371,"date":"2025-03-27T08:00:15","date_gmt":"2025-03-27T05:00:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/"},"modified":"2025-03-27T08:00:15","modified_gmt":"2025-03-27T05:00:15","slug":"androidde-singleton-tasarim-desenini-kullanma-rehberi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/","title":{"rendered":"Android&#8217;de Singleton Tasar\u0131m Desenini Kullanma Rehberi"},"content":{"rendered":"<p>Android&#8217;de Singleton Tasar\u0131m Desenini Kullanma Rehberi<\/p>\n<p>Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Android uygulamalar\u0131n\u0131zda Singleton tasar\u0131m desenini nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m.  Singleton, bir s\u0131n\u0131f\u0131n yaln\u0131zca tek bir \u00f6rne\u011finin olu\u015fturulmas\u0131n\u0131 sa\u011flayan ve bu \u00f6rne\u011fe global bir eri\u015fim noktas\u0131 sunan bir tasar\u0131m deseni olarak tan\u0131mlan\u0131r.  Bu, uygulaman\u0131zda belirli kaynaklar\u0131 y\u00f6netmek veya belirli bir veriyi tek bir noktadan kontrol etmek i\u00e7in olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r.  \u00d6rne\u011fin, bir veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6neticisi veya tercihleri y\u00f6neten bir s\u0131n\u0131f i\u00e7in ideal bir \u00e7\u00f6z\u00fcmd\u00fcr.<\/p>\n<h2>Singleton&#8217;\u0131n Avantajlar\u0131 ve Dezavantajlar\u0131<\/h2>\n<p>Singleton tasar\u0131m deseninin bir\u00e7ok avantaj\u0131 vard\u0131r.  \u00d6ncelikle, kaynaklar\u0131 verimli bir \u015fekilde kullanmam\u0131z\u0131 sa\u011flar.  Tek bir \u00f6rnek oldu\u011fu i\u00e7in, gereksiz nesne olu\u015fturma i\u015flemlerinden ka\u00e7\u0131n\u0131l\u0131r.  Ayr\u0131ca, uygulama genelinde tek bir eri\u015fim noktas\u0131 sunarak, veri tutarl\u0131l\u0131\u011f\u0131n\u0131 ve kod okunabilirli\u011fini art\u0131r\u0131r.  Ancak, her \u015feyde oldu\u011fu gibi, dezavantajlar\u0131 da vard\u0131r.  Test edilebilirli\u011fi zorla\u015ft\u0131rabilir, \u00e7\u00fcnk\u00fc s\u0131n\u0131f\u0131n davran\u0131\u015f\u0131n\u0131 izole etmek zordur.  Ayr\u0131ca, tekil bir nesnenin olu\u015fmas\u0131, uygulama ba\u015flat\u0131lmas\u0131 s\u0131ras\u0131nda gecikmeye sebep olabilir.  Bu nedenle, kullan\u0131m\u0131 gerekti\u011finde dikkatlice de\u011ferlendirilmelidir.<\/p>\n<h2>Android&#8217;de Singleton Uygulamas\u0131<\/h2>\n<p>\u015eimdi, Android&#8217;de Singleton&#8217;\u0131 nas\u0131l uygulayabilece\u011fimize bakal\u0131m.  A\u015fa\u011f\u0131daki \u00f6rnek, bir veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6neticisi i\u00e7in bir Singleton s\u0131n\u0131f\u0131 g\u00f6stermektedir:<\/p>\n<pre><code class=\"java\">\npublic class DatabaseManager {\n\n    private static DatabaseManager instance;\n    private SQLiteDatabase database;\n\n    private DatabaseManager(Context context) {\n        \/\/ Veritaban\u0131 ba\u011flant\u0131s\u0131 burada kurulur.\n        database = new DatabaseHelper(context).getWritableDatabase();\n    }\n\n    public static synchronized DatabaseManager getInstance(Context context) {\n        if (instance == null) {\n            instance = new DatabaseManager(context);\n        }\n        return instance;\n    }\n\n    public SQLiteDatabase getDatabase() {\n        return database;\n    }\n\n    public void closeConnection() {\n      \/\/ Veritaban\u0131 ba\u011flant\u0131s\u0131n\u0131 kapatma i\u015flemleri burada yap\u0131l\u0131r.\n      if (database != null && database.isOpen()){\n          database.close();\n      }\n    }\n}\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>getInstance()<\/code> metodu, Singleton \u00f6rne\u011fine eri\u015fim sa\u011flar.  E\u011fer \u00f6rnek hen\u00fcz olu\u015fturulmam\u0131\u015fsa,  <code>synchronized<\/code> blok  ayn\u0131 anda birden fazla thread taraf\u0131ndan \u00e7a\u011fr\u0131lmas\u0131n\u0131 \u00f6nleyerek, tek bir \u00f6rne\u011fin olu\u015fturulmas\u0131n\u0131 garanti eder.  <code>getDatabase()<\/code> metodu ise veritaban\u0131 ba\u011flant\u0131s\u0131na eri\u015fim sa\u011flar.  <code>closeConnection()<\/code> metodu ise veritaban\u0131 ba\u011flant\u0131s\u0131n\u0131 kapat\u0131r.  Bu, kaynaklar\u0131n etkili bir \u015fekilde y\u00f6netilmesini sa\u011flar.  Bu \u00f6rnekte Context nesnesi parametre olarak verildi.  Dikkat edilmesi gereken bir nokta, Context nesnesinin Application Context&#8217;inin kullan\u0131lmas\u0131d\u0131r.  Activity veya Service Context&#8217;i kullanmak memory leak&#8217;lere neden olabilir.  Bunun nedeni,  Activity veya Service&#8217;in yok edildikten sonra bile Context nesnesinin DatabaseManager taraf\u0131ndan tutulmaya devam etmesidir.<\/p>\n<h2>Singleton&#8217;\u0131n Alternatifleri<\/h2>\n<p>Singleton&#8217;\u0131n baz\u0131 dezavantajlar\u0131 g\u00f6z \u00f6n\u00fcne al\u0131nd\u0131\u011f\u0131nda,  baz\u0131 durumlarda alternatif \u00e7\u00f6z\u00fcmler daha uygun olabilir.  \u00d6rne\u011fin, Dependency Injection (Ba\u011f\u0131ml\u0131l\u0131k Enjeksiyonu) tekni\u011fi, test edilebilirli\u011fi art\u0131rarak daha esnek bir yap\u0131 sunar.  Ayr\u0131ca,  Factory desenleri de tek bir noktadan nesne olu\u015fturulmas\u0131n\u0131 sa\u011flar ancak Singleton&#8217;daki gibi tek bir \u00f6rnekle s\u0131n\u0131rl\u0131 kalmaz.<\/p>\n<p>Sonu\u00e7 olarak, Singleton, belirli durumlarda yararl\u0131 bir tasar\u0131m deseni olsa da,  avantajlar\u0131 ve dezavantajlar\u0131 dikkatlice de\u011ferlendirilmeli ve  alternatif \u00e7\u00f6z\u00fcmler ara\u015ft\u0131r\u0131lmal\u0131d\u0131r.  Uygulaman\u0131z\u0131n gereksinimlerine en uygun \u00e7\u00f6z\u00fcm\u00fc se\u00e7mek \u00f6nemlidir.<\/p>\n<p>Umar\u0131m bu makale size Android&#8217;de Singleton tasar\u0131m desenini kullanma konusunda yard\u0131mc\u0131 olmu\u015ftur. Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.<\/p>\n<p>Faydal\u0131 bulabilece\u011finiz di\u011fer kaynaklar:<\/p>\n<ul>\n<li><a href=\"https:\/\/dev.to\/shalenmathew\/a-guide-to-using-singleton-design-pattern-in-android-41bd\">A Guide to Using Singleton Design Pattern in Android<\/a><\/li>\n<p>  <!--Di\u011fer kaynaklar buraya eklenebilir-->\n<\/ul>\n<p>#Etiketler: Android, Singleton, Tasar\u0131m Deseni,  Singleton Pattern, Android Geli\u015ftirme,  Kotlin, Java,  Programlama,  Mobil Geli\u015ftirme,  Yaz\u0131l\u0131m Mimarisi, DatabaseManager,  Dependency Injection<\/p>\n","protected":false},"excerpt":{"rendered":"Android&#8217;de Singleton Tasar\u0131m Desenini Kullanma Rehberi Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Android uygulamalar\u0131n\u0131zda Singleton tasar\u0131m desenini nas\u0131l&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-16371","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Android&#039;de Singleton Tasar\u0131m Desenini Kullanma Rehberi<\/title>\n<meta name=\"description\" content=\"Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Android uygulamalar\u0131n\u0131zda Singleton tasar\u0131m desenini nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Singleton, bir s\u0131n\u0131f\u0131n yaln\u0131zca tek bir \u00f6rne\u011finin olu\u015fturulmas\u0131n\u0131 sa\u011flayan ve bu \u00f6rne\u011fe global bir eri\u015fim noktas\u0131 sunan bir tasar\u0131m deseni olarak tan\u0131mlan\u0131r. Bu, uygulaman\u0131zda belirli kaynaklar\u0131 y\u00f6netmek veya belirli bir veriyi tek bir noktadan kontrol etmek i\u00e7in olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r. \u00d6rne\u011fin, bir veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6neticisi veya tercihleri y\u00f6neten bir s\u0131n\u0131f i\u00e7in ideal bir \u00e7\u00f6z\u00fcmd\u00fcr.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Android&#039;de Singleton Tasar\u0131m Desenini Kullanma Rehberi\" \/>\n<meta property=\"og:description\" content=\"Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Android uygulamalar\u0131n\u0131zda Singleton tasar\u0131m desenini nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Singleton, bir s\u0131n\u0131f\u0131n yaln\u0131zca tek bir \u00f6rne\u011finin olu\u015fturulmas\u0131n\u0131 sa\u011flayan ve bu \u00f6rne\u011fe global bir eri\u015fim noktas\u0131 sunan bir tasar\u0131m deseni olarak tan\u0131mlan\u0131r. Bu, uygulaman\u0131zda belirli kaynaklar\u0131 y\u00f6netmek veya belirli bir veriyi tek bir noktadan kontrol etmek i\u00e7in olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r. \u00d6rne\u011fin, bir veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6neticisi veya tercihleri y\u00f6neten bir s\u0131n\u0131f i\u00e7in ideal bir \u00e7\u00f6z\u00fcmd\u00fcr.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-27T05:00:15+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Android&#8217;de Singleton Tasar\u0131m Desenini Kullanma Rehberi\",\"datePublished\":\"2025-03-27T05:00:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/\"},\"wordCount\":556,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/\",\"name\":\"Android'de Singleton Tasar\u0131m Desenini Kullanma Rehberi\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-03-27T05:00:15+00:00\",\"description\":\"Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Android uygulamalar\u0131n\u0131zda Singleton tasar\u0131m desenini nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Singleton, bir s\u0131n\u0131f\u0131n yaln\u0131zca tek bir \u00f6rne\u011finin olu\u015fturulmas\u0131n\u0131 sa\u011flayan ve bu \u00f6rne\u011fe global bir eri\u015fim noktas\u0131 sunan bir tasar\u0131m deseni olarak tan\u0131mlan\u0131r. 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Bu yaz\u0131da, Android uygulamalar\u0131n\u0131zda Singleton tasar\u0131m desenini nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Singleton, bir s\u0131n\u0131f\u0131n yaln\u0131zca tek bir \u00f6rne\u011finin olu\u015fturulmas\u0131n\u0131 sa\u011flayan ve bu \u00f6rne\u011fe global bir eri\u015fim noktas\u0131 sunan bir tasar\u0131m deseni olarak tan\u0131mlan\u0131r. Bu, uygulaman\u0131zda belirli kaynaklar\u0131 y\u00f6netmek veya belirli bir veriyi tek bir noktadan kontrol etmek i\u00e7in olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r. \u00d6rne\u011fin, bir veritaban\u0131 ba\u011flant\u0131s\u0131 y\u00f6neticisi veya tercihleri y\u00f6neten bir s\u0131n\u0131f i\u00e7in ideal bir \u00e7\u00f6z\u00fcmd\u00fcr.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/fatihsoysal.com\/blog\/androidde-singleton-tasarim-desenini-kullanma-rehberi\/","og_locale":"tr_TR","og_type":"article","og_title":"Android'de Singleton Tasar\u0131m Desenini Kullanma Rehberi","og_description":"Merhaba, Fatih Soysal burada. Bu yaz\u0131da, Android uygulamalar\u0131n\u0131zda Singleton tasar\u0131m desenini nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. 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