尝试将手势保存到手势库时的问题
问题描述:
我从目录中的文件构建手势并尝试将它们保存在手势库中。 我不能这样做正确,请帮助尝试将手势保存到手势库时的问题
class B implements Runnable
{
File main;
B(File temp)
{
main=temp;
}
public void savegesture()
{
final GestureLibrary store=sStore;
for(int i=0;i<list.size();i++)
{
try{
String name="0"+i;
store.addGesture(name, list.get(i));
store.save();
}catch(Exception e)
{
System.out.println("error");
}
}
}
public void run()
{
File[] newfiles=main.listFiles();
File[] temp=null;
int progress=0;
float dircnt=0;
int numberoffiles=newfiles.length;
for(File b:newfiles)
{
try{
Gesture gest;
gest=dotask.batchprocess(b);
if(gest!=null)
{
System.out.println("success");
list.add(gest);
}
}catch(Exception e)
{
System.out.println("error saving file");
}
savegesture();
}
}
}
public void addgestures()
{
cView.postInvalidate();
dotask.setH(cView.getH());
dotask.setW(cView.getW());
count=0;
B b=new B(dir);
Thread t=new Thread(b);
t.start();
} 谁能说得清是从我的logcat我无法理解的错误。
02-06 20:25:18.269: E/AndroidRuntime(31886): FATAL EXCEPTION: Thread-11
02-06 20:25:18.269: E/AndroidRuntime(31886): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
02-06 20:25:18.269: E/AndroidRuntime(31886): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257)
02-06 20:25:18.269: E/AndroidRuntime(31886): at java.util.ArrayList.get(ArrayList.java:311)
02-06 20:25:18.269: E/AndroidRuntime(31886): at android.gesture.Instance.temporalSampler(Instance.java:91)
02-06 20:25:18.269: E/AndroidRuntime(31886): at android.gesture.Instance.createInstance(Instance.java:76)
02-06 20:25:18.269: E/AndroidRuntime(31886): at android.gesture.GestureStore.addGesture(GestureStore.java:158)
02-06 20:25:18.269: E/AndroidRuntime(31886): at android.gesture.GestureLibrary.addGesture(GestureLibrary.java:68)
02-06 20:25:18.269: E/AndroidRuntime(31886): at com.android.pack.TestActivity$B.savegesture(TestActivity.java:83)
02-06 20:25:18.269: E/AndroidRuntime(31886): at com.android.pack.TestActivity$B.run(TestActivity.java:117)
02-06 20:25:18.269: E/AndroidRuntime(31886): at java.lang.Thread.run(Thread.java:1019)
}
答
我觉得你的问题是在这里:
gest=dotask.batchprocess(b);
所以这段代码:
if(gest!=null)
{
System.out.println("success");
list.add(gest);
}
,不会被调用列表的大小始终为0
Bump,“java.lang.IndexOutOfBoundsException:索引无效0,大小为0“ – 2012-02-07 02:57:52