The following 4 animation effects are available in Android: 1, alphaanimation transparency animation effect 2, Scaleanimation Zoom animation effect 3, translateanimation displacement animation effect 4, rotateanimation rotation Animation effectsAndroid's networkonmainthreadexception anomalyhttp://blog.csdn.net/mad1989/article/details/25964495QuerySqlitedatabase DBInstance; cursor cursor = dbinstance.query (String table,string []columns, String selection, String[]selectionargs, string having, s Tring); Tables: Table name, cannot be nullcolumns: The column name to query, can be multiple, can be NULL, indicates query all columns selection: Query criteria, such as id=? and name=? Can be Nullselectionargs: Assign a value to a query condition, a question mark corresponds to a value, in order can be nullhaving: syntax has, can be nullorderby: syntax, sorted by XX, can be nullandroid layout and picture usage specificationshttp://blog.csdn.net/u011733020/article/details/51861682Android System in order to save memory, generally does not support the direct display of GIF pictures, even if you force the setting, will only show the first frame of the picture.
Android Learning Note
