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How to pass a variable from Activity to Fragment, and pass it back?
I am currently making an android app, and I want to pass a date between activity and fragment.
My activity has a button, which opens the fragment: DatePickerFragment.
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Access Enum value using EL with JSTL
...ption 2, the compiler can not verify it, but at runtime the string will be converted into an enum using Enum.valueOf(Class<T> enumType, String name) which will trigger an ELException if the enum has no constant with that name. The expression will not just always be false.
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data type not understood
... postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9....
Getting activity from context in android
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This is something that I have used successfully to convert Context to Activity when operating within the UI in fragments or custom views. It will unpack ContextWrapper recursively or return null if it fails.
public Activity getActivity(Context context)
{
if (context == n...
What is the difference between class and instance attributes?
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Only the mutable types are shared. Like for int and str they still attached with each instances rather than class.
– Babu
Jul 17 '14 at 11:59
11
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How to get a Fragment to remove itself, i.e. its equivalent of finish()?
I'm converting an app to use fragments using the compatibility library.
Now currently I have a number of activities (A B C D) which chain onto one another, D has a button 'OK' which when pressed calls finish which then bubbles up through onActivityResult() to additionally destroy C and B.
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Is Java “pass-by-reference” or “pass-by-value”?
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Java is always pass-by-value.
Unfortunately, we never handle an object at all, instead juggling object-handles called references (which are passed by value of course). The chosen terminology and semantics easily confuse many beginners.
It goes like this:
public static void main(...
Inner join vs Where
...="T2"."ID"))
-- 2 table access full table1
-- 3 table access full table2
And the execution plan for the query using a WHERE clause.
-- with where clause
EXPLAIN PLAN FOR
SELECT * FROM table1 t1, table2 t2
WHERE t1.id = t2.id;
SELECT *
FROM TABLE (DBMS_XPLAN.DISPLAY);
-- 0 select statement
-- 1...
What type of hash does WordPress use?
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Just tried it also and logged in. The MD5 got auto-converted to a wp hash. Wp version 5.1
– Miro
Nov 20 '19 at 23:16
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Calling Java varargs method with single null argument?
...ably should have just used Arrays.toString() since the only reason it gets converted to a List is so it will print pretty.
– Mike Deck
Jun 20 '14 at 6:17
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