我只是在学习AsyncTask,并希望将其用作单独的类,而不是子类。
例如
class inetloader extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
String response = "";
DefaultHttpClient client = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(urls[0]);
try {
HttpResponse execute = client.execute(httpGet);
InputStream content = execute.getEntity().getContent();
BufferedReader buffer = new BufferedReader(
new InputStreamReader(content));
String s = "";
while ((s = buffer.readLine()) != null) {
response += s;
}
} catch (Exception e) {
e.printStackTrace();
}
return response;
}
@Override
protected void onPostExecute(String result) {
Log.e("xx",result);
// how do I pass this result back to the thread, that created me?
}
}
和主(UI)线程:
inetloader il = new inetloader();
il.execute("http://www.google.com");
//il.onResult()
//{
///do something...
//}
谢谢!
使用接口。像这样:
interface CallBackListener{
public void callback();
}
然后在 UI 线程中执行此操作:
inetloader il = new inetloader();
li.setListener(this);
il.execute("http://www.google.com");
在 inetloader 中,添加:
CallBackListener mListener;
public void setListener(CallBackListener listener){
mListener = listener;
}
则在 postExecute() 中,执行以下操作:
mListener.callback();
您可以将活动实例传递给构造函数并从那里调用活动函数...
喜欢使用界面:
public interface ResultUpdatable {
public void setResult(Object obj);
}
在活动中实现这一点,并传入异步任务的构造函数,并使用setResult
函数更新onPostExecute
的结果。
inetloader il = new inetloader();
il.execute("http://www.google.com");
String result = il.get();//put it in try-catch
^^^^^^^^
here you get result which is in onPostExecute(String result)