我正在编写一个聚合物应用程序,服务器将根据请求返回图像文件名。 1或2个图像文件可能会返回。我想在阴影dom中添加动态生成的铁图像元素。我可以检查是否添加了铁图像元素,但图像没有显示。什么错了?
" test3.png"与html文件位于同一位置。
public class MyRunnable implements Runnable{
@Override
public void run() {
System.out.println("Thread 1 :First Thread started");
}
public static Runnable delay(){
Runnable r = new Runnable(){
@Override
public void run() { // running state
System.out.println("Thread 2: loading second thread..");
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Thread 2: System loaded");
}
}; // finished state
return r;
}
public static Runnable waiting(){
Runnable r = new Runnable(){
@Override
public void run() { // running state
System.out.println("Thread 3: waiting..");
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Thread 3: OK");
}
}; // finished state
return r;
}
public static void main(String[] args) throws InterruptedException{
Thread thread1 = new Thread(new MyRunnable());
Thread thread2 = new Thread(delay());
Thread thread3 = new Thread(waiting()); // (initial state)
thread1.start();
thread2.start();
thread3.start();
}
}
答案 0 :(得分:0)
使用img.src,这样就可以访问绑定的组件属性而不是html元素属性。
这是你的示例有点扩展,也将src属性暴露给元素之外的世界:https://gist.github.com/IgorRubinovich/36bc1ce3a314ed7cf032
有关详情,请参阅http://www.polymer-project.org/1.0/docs/devguide/properties.html。