記錄了Android系統上由於cursor泄露導致記憶體耗盡(error -12)導致的CursorWindow不能再建立的Issue。[Symptom]08-30 20:27:36.751 E/CursorWindow( 760): Could not allocate CursorWindow '/data/data/com.android.providers.media/databases/external.db' of size 2097152 due to
第一階段:Java物件導向編程1.Java基礎資料型別 (Elementary Data Type)與運算式,分支迴圈。2.String和StringBuffer的使用、Regex。3.物件導向的抽象,封裝,繼承,多態,類與對象,對象初始化和回收;建構函式、this關鍵字、方法和方法的參數傳遞過程、static關鍵字、內部類,Java的垃極回收機制,Javadoc介紹。4.對象執行個體化過程、方法的覆蓋、final關鍵字、抽象類別、介面、繼承的優點和缺點剖析;對象的多態性:子類和父類之間的轉換、
Unlike other programming paradigms in which apps are launched with a main() method, the Android system initiates code in an Activity instance by invoking specific callback methods that correspond to specific stages of its lifecycle. There is a
For instance, if you build a social app that can share messages or photos with the user's friends, it's in your best interest to support the ACTION_SEND intent so users can initiate a "share" action from another app and launch your
Use Density-independent PixelsOne common pitfall you must avoid when designing your layouts is using absolute pixels to define distances or sizes. Defining layout dimensions with pixels is a problem because different screens have different pixel