On iOS, what are the differences between margins, edge insets, content insets, alignment rects, layout margins, anchors…?

See this UIKit: Apps for Every Size and Shape before and after reading this. Might also want to see the notes from here as well. Being the Bounty offerer…I’d say the majority of my confusion came from not properly understanding the UILayoutGuide class. That is key, but also very simple. Let me first introduce a …

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create if not exists view?

From section 12.1.12. CREATE VIEW Syntax of the MySQL 5.0 Reference Manual: CREATE VIEW Syntax CREATE [OR REPLACE] [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}] [DEFINER = { user | CURRENT_USER }] [SQL SECURITY { DEFINER | INVOKER }] VIEW view_name [(column_list)] AS select_statement [WITH [CASCADED | LOCAL] CHECK OPTION] The CREATE VIEW statement creates …

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Inflating a xml layout in a custom View class

You can’t add views to the View class instead you should use ViewGroup or one of its subclasses(like Linearlayout, RelativeLayout etc). Then your code will be like this: public class View1 extends LinearLayout { View view; String[] countries = new String[] {“India”, “USA”, “Canada”}; public View1( Context context) { super(context); inflate(context, R.layout.test2, this); } }

Loop through all subviews of an Android view?

I have made a small example of a recursive function: public void recursiveLoopChildren(ViewGroup parent) { for (int i = 0; i < parent.getChildCount(); i++) { final View child = parent.getChildAt(i); if (child instanceof ViewGroup) { recursiveLoopChildren((ViewGroup) child); // DO SOMETHING WITH VIEWGROUP, AFTER CHILDREN HAS BEEN LOOPED } else { if (child != null) { …

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Redraw a single row in a listview [duplicate]

As Romain Guy explained a while back during the Google I/O session, the most efficient way to only update one view in a list view is something like the following (this one update the whole View data): ListView list = getListView(); int start = list.getFirstVisiblePosition(); for(int i=start, j=list.getLastVisiblePosition();i<=j;i++) if(target==list.getItemAtPosition(i)){ View view = list.getChildAt(i-start); list.getAdapter().getView(i, view, …

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