我想从一个单独的线程打开一个对话框,但是在使用这种synchronized
方式时,我得到了一个错误。
如果我使用该方法invokeAndWait
一切正常,但是我不明白为什么我不能使用synchronized
.
这是我在屏幕上调用的代码:
public void Login() {
new HttpRequestDispatcher("http://www.google.com", "GET", this) {
public void onSuccess(byte[] baos, String contentType) {
synchronized(UiApplication.getEventLock()){
Dialog.alert("Cooooooool....");
}
}
public void onFail(String message){
synchronized(UiApplication.getEventLock()){
Dialog.alert(message);
}
}
}.start();
}
这是 HttpRequestDispatcherThread:
public abstract class HttpRequestDispatcher extends Thread {
String url;
String method;
Screen scr;
public HttpRequestDispatcher(String url, String method, Screen scr) {
this.url = url;
this.method = method;
this.scr = scr;
}
public abstract void onFail(String message);
public abstract void onSuccess(byte[] baos, String contentType);
public void beforeSend() {}
public void onComplete() {}
public void run() {
beforeSend();
try {
HttpConnection connection = (HttpConnection) Connector.open(url);
connection.setRequestMethod(method);
int responseCode = connection.getResponseCode();
if (responseCode != HttpConnection.HTTP_OK) {
onFail(connection.getResponseMessage());
connection.close();
return;
}
String contentType = connection.getHeaderField("Content-type");
int contentLength = (int) connection.getLength();
if (contentLength < 0)
contentLength = 10000;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream responseData = connection.openInputStream();
byte[] buffer = new byte[contentLength];
int bytesRead = responseData.read(buffer);
while (bytesRead > 0) {
baos.write(buffer, 0, bytesRead);
bytesRead = responseData.read(buffer);
}
baos.close();
connection.close();
onComplete();
onSuccess(baos.toByteArray(), contentType);
} catch (Exception e) {
}
}
}
我在模拟器中收到此错误:“JVM Error 104 Uncought: ArrayIndexOutOfBoundsException”