AIR for androd 笔记

 1 1.stage.addEventListener(Event.ACTIVE,onActive);

 2 

 3   stage.addEventListener(Event.DEACTIVE,onDeactive);

 4 

 5 

 6 

 7 2.KeyboardEvent

 8    switch(e.keycode){

 9         case Keyboard.BACK:  break;

10         case Keyboard.HOME: break;

11         case Keyboard.SEARCH: break;

12     }

13 }

SQLite是运行本地环境的一个数据库系统，保存数据在硬盘上的文件中。每一个数据库保存一个文件

首先创建一个数据库，然后打开数据库（这两部可以一起），创建表，

创建db:

 1 import flash.filesystem.File;

 2 import flash.events.SQLErrorEvent;

 3 import flash.events.SQLEvent;

 4 import flash.data.SQLConnection;

 5 

 6 var file:File=File.applicationStorageDirectory.resolvePath("test.db");

 7 var conn:SQLConnection=new SQLConnection();

 8 conn.addEventListener(SQLEvent.OPEN,onOpen);

 9 conn.addEventListener(SQLErrorEvent.ERROR,onError);

10 try{

11     conn.open(file);

12     txt.appendText("-----open ");

13 }catch(e){

14     txt.appendText("-----error oh!!!");

15 }

16 function onOpen(e:SQLEvent){

17     txt.appendText("-----open success");

18 }

19 function onError(e:SQLErrorEvent){

20     txt.appendText("-----open error");

21 }

 创建表：

 1 var sql:String ="CREATE TABLE IF NOT EXISTS employees (" +  

 2     "    empId INTEGER PRIMARY KEY AUTOINCREMENT, " +  

 3     "    firstName TEXT, " +  

 4     "    lastName TEXT, " +  

 5     "    salary NUMERIC CHECK (salary > 0)" +  

 6     ")"; 

 7 var statm:SQLStatement=new SQLStatement();

 8 statm.addEventListener(SQLEvent.RESULT,onResult);

 9 statm.sqlConnection=conn;

10 statm.text=sql;

11 statm.execute();

12 function onResult(e:SQLEvent){

13     trace("----创建表成功");

14 }

查询数据：

 1 selectStmt.sqlConnection = conn; 

 2      

 3 selectStmt.text = "SELECT itemId, itemName, price FROM products"; 

 4      

 5 selectStmt.addEventListener(SQLEvent.RESULT, resultHandler); 

 6 selectStmt.addEventListener(SQLErrorEvent.ERROR, errorHandler); 

 7      

 8 selectStmt.execute(); 

 9      

10 function resultHandler(event:SQLEvent):void 

11 { 

12     var result:SQLResult = selectStmt.getResult(); 

13      

14     var numResults:int = result.data.length; 

15     for (var i:int = 0; i < numResults; i++) 

16     { 

17         var row:Object = result.data[i]; 

18         var output:String = "itemId: " + row.itemId; 

19         output += "; itemName: " + row.itemName; 

20         output += "; price: " + row.price; 

21         trace(output); 

22     } 

23 } 

24      

25 function errorHandler(event:SQLErrorEvent):void 

26 { 

27     // Information about the error is available in the 

28     // event.error property, which is an instance of  

29     // the SQLError class. 

30 }

插入数据：

 1 var insertStmt:SQLStatement = new SQLStatement(); 

 2 insertStmt.sqlConnection = conn; 

 3      

 4 // define the SQL text 

 5 var sql:String =  

 6     "INSERT INTO employees (firstName, lastName, salary) " +  

 7     "VALUES ('Bob', 'Smith', 8000)"; 

 8 insertStmt.text = sql; 

 9      

10 // register listeners for the result and failure (status) events 

11 insertStmt.addEventListener(SQLEvent.RESULT, insertResult); 

12 insertStmt.addEventListener(SQLErrorEvent.ERROR, insertError); 

13      

14 // execute the statement 

15 insertStmt.execute(); 

16      

17 function insertResult(event:SQLEvent):void 

18 { 

19     trace("INSERT statement succeeded"); 

20 } 

21      

22 function insertError(event:SQLErrorEvent):void 

23 { 

24     trace("Error message:", event.error.message); 

25     trace("Details:", event.error.details); 

26 } 

 使用加密的数据库