Vishal处在正确的轨道上，但要与Android的版本相匹配还需要更多
AsyncTask。由于BlackBerry上Java
1.3无法提供枚举和泛型，因此您无法完美匹配Android API。
但是，您可以执行以下操作（未经测试……这只是您的起点）：
import net.rim.device.api.ui.UiApplication;public abstract class AsyncTask { public static final int FINISHED = 0; public static final int PENDING = 1; public static final int RUNNING = 2; private int _status = PENDING; private boolean _cancelled = false; private Thread _worker; public abstract Object doInBackground(Object[] params); protected void onPreExecute() { // default implementation does nothing } protected void onPostExecute(Object result) { // default implementation does nothing } protected void onProgressUpdate(Object[] values) { // default implementation does nothing } protected void onCancelled() { // default implementation does nothing } protected void onCancelled(Object result) { onCancelled(); } public final int getStatus() { return _status; } public final boolean isCancelled() { return _cancelled; } public final boolean cancel(boolean mayInterruptIfRunning) { if (_status == FINISHED || _cancelled) { return false; } else { _cancelled = true; if (mayInterruptIfRunning && _status == RUNNING) { // NOTE: calling Thread.interrupt() usually doesn't work // well, unless you don't care what state the background // processing is left in. I'm not 100% sure that this is how // Android's AsyncTask implements cancel(true), but I // normally just cancel background tasks by letting the // doInBackground() method check isCancelled() at multiple // points in its processing. _worker.interrupt(); } return true; } } protected final void publishProgress(final Object[] values) { // call back onProgressUpdate on the UI thread UiApplication.getUiApplication().invokeLater(new Runnable() { public void run() { onProgressUpdate(values); } }); } private void completeTask(final Object result) { // transmit the result back to the UI thread UiApplication.getUiApplication().invokeLater(new Runnable() { public void run() { if (isCancelled()) { onCancelled(result); } else { onPostExecute(result); } // TODO: not sure if status should be FINISHED before or after onPostExecute() _status = FINISHED; } }); } public AsyncTask execute(final Object[] params) throws IllegalStateException { if (getStatus() != PENDING) { throw new IllegalStateException("An AsyncTask can only be executed once!"); } else { try { onPreExecute(); _worker = new Thread(new Runnable() { public void run() { try { // run background work on this worker thread final Object result = doInBackground(params); completeTask(result); } catch (Exception e) { // I believe if Thread.interrupt() is called, we'll arrive here completeTask(null); } } }); _status = RUNNING; _worker.start(); } catch (Exception e) { // TODO: handle this exception } } return this; }}另外，请务必牢记适用于上述实现的Android AsyncTask线程规则：
线程规则 为了使此类正常工作，必须遵循一些线程规则：
必须在UI线程上加载AsyncTask类。从JELLY_BEAN开始，这是自动完成的。
必须在UI线程上创建任务实例。
必须在UI线程上调用execute（Params …）。
不要手动调用onPreExecute（），onPostExecute（Result），doInBackground（Params
…），onProgressUpdate（Progress …）。该任务只能执行一次（如果尝试第二次执行，则将引发异常。）
