我需要将LoginMechanism更改为asynchTask,以便它不会在SDK 4.x中引发android.os.NetworkOnMainThreadException。我不清楚如何在此异步任务中启动新的意图。我了解该工作将在doInBackground-Method中完成,并且此返回结果将在onPostExecute方法中进行处理。在这种方法中,我尝试启动新活动和服务,但它向我显示了编译器错误
The constructor Intent(MainActivity.LoginTask, Class<AttachService>) is undefined
这是onPostExecute方法
@Override
protected void onPostExecute(String result) {
super.onPostExecute( result );
if (result.equals("")){
loginError.setText(R.string.login_error);
loginError.setVisibility(View.VISIBLE);
}
else{
loginError.setVisibility(View.INVISIBLE);
startService(new Intent(LoginTask.this, AttachService.class));
Log.d(TAG, "setting status of user " + login.getText().toString() + " to stored for service endpoint " + service_endpoint_spinner.getSelectedItemId());
if (appData.getLoggedInUser() == null){
loggedInUser = DBManager.getInstance().storeUser(user,hashedPw,target, true);
appData.setLoggedInUser(loggedInUser);
DBManager.getInstance().setUserStatusToStored(loggedInUser);
}
startActivity(new Intent(this, ActionActivity.class));
}
}
所有的startservice和startActivity方法都会产生编译器错误,有人可以解释原因。
谢谢
最佳答案
采用
startActivity(new Intent(Your_Current_Activity.this, ActionActivity.class));
要么
startActivity(new Intent(getApplicationContext(), ActionActivity.class));
代替
startActivity(new Intent(this, ActionActivity.class));
用于从onPostExecute开始新活动
关于android - 是否可以在onPostExecute中启动 Activity ?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/13936077/