我正在为android制作一个简单的程序,什么可以添加,读取和写入文本行到一个txt文件并显示在列表中。 我得到了saveFile();函数将todo_items数组写入文件todo.txt。 但由于某种原因,而不是显示列表中的真实文本行,它给了我数字... 例如,当我添加“喂狗,喂猫,喂鱼,喂鸟”,然后删除结果中的3d项它给了我“0,1,2”。不知道为什么。下面是函数的代码如何将数组写入文件
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
height="494" creationComplete="readFile()"
>
<fx:Script>
<![CDATA[
public var intTemp:int;
import mx.collections.ArrayCollection;
[Bindable] public var todo_items:ArrayCollection;
private function readFile():void
{
var todoFile:File =File.applicationStorageDirectory.resolvePath("todo.txt");
var fs:FileStream = new FileStream();
fs.open(todoFile, FileMode.READ);
var result:String = fs.readUTFBytes(fs.bytesAvailable);
var items:Array = result.split("\n");
items.pop();
todo_items = new ArrayCollection(items);
fs.close();
}
private function writeFile():void
{
var todoFile:File = File.applicationStorageDirectory.resolvePath("todo.txt");
var fs:FileStream = new FileStream();
fs.open(todoFile, FileMode.APPEND);
fs.writeUTFBytes(task_txt.text + "\n");
fs.close();
readFile();
}
private function deleteItem():void
{
var todoFile:File =File.applicationStorageDirectory.resolvePath("todo.txt");
var fs:FileStream = new FileStream();
fs.open(todoFile, FileMode.READ);
var result:String = fs.readUTFBytes(fs.bytesAvailable);
var items:Array = result.split("\n");
items.pop();
todo_items = new ArrayCollection(items);
todo_items.removeItemAt(intTemp);
fs.close();
safeFile();
}
private function safeFile():void
{
var todoFile:File = File.applicationStorageDirectory.resolvePath("todo.txt");
var fs:FileStream = new FileStream();
fs.open(todoFile, FileMode.WRITE);
for(var item:String in todo_items)
{
fs.writeUTFBytes(item + "\n")
}
fs.close();
readFile();
}
]]>
</fx:Script>
<s:List id="todo_list" left="10" right="10" top="142" bottom="87" dataProvider="{todo_items}"/>
<s:Button left="11" right="10" top="69" height="65" label="Save task" click="writeFile(); task_txt.text = null"
enabled="{task_txt.text.length > 0}"/>
<s:TextInput id="task_txt" left="10" right="10" top="10" height="51" prompt="Specify a task"/>
<s:Button left="10" right="10" bottom="14" label="Delete"
click="intTemp = todo_list.selectedIndex; todo_items.removeItemAt(todo_list.selectedIndex); deleteItem()"
enabled="{todo_list.selectedIndex != -1}"/>
</s:Application>
'todo_items'从哪里来?请给更多的代码。或至少是其声明 – poussma 2012-07-25 09:33:32
以下是完整的代码 – 2012-07-25 09:37:46
代码在哪里? – poussma 2012-07-25 09:40:45