How to find TextView with ID when creating ID's with View.GenerateViewId

I'm creating X amount of TextViews dynamically and giving them ID's with View.generateViewId().

TextView textView = new TextView(this);
textView.setText("_");
...
...
int id = View.generateViewId();
textView.setId(id);


And I get some IDs generated e.g 1-5, depending on the number of TextViews. But after searching different forums and the official android site I can't figure out how to access these ID's.

How do I target lets say the TextView with ID = 1 if I want to setText() in that one? Tried some different things like using findViewById and R-class but doesn't seem to work.

Appreciate any direct help or links that are relevant, thanks.

2 Answers
2

declare the map:

public static final Map<String, Integer> ITEM_MAP = new HashMap<String, Integer>();


keep a track of items:

int id = View.generateViewId();
textView.setId(id);
ITEM_MAP.put("key1", id);

int id2 = View.generateViewId();
textView.setId(id2);
ITEM_MAP.put("key2", id2);


3.and then when needed:

int id = ITEM_MAP.get("key?X");
TextView textView = findViewById(id);


Good luck )

If you are going for a map, I'd suggest the same as @Hovanes Mosoyan's Answer but, rather than using strings as keys, use the id's as keys and then the value would be the textviews.

private Map<Int, TextView> textViewMap = HashMap();
...
// Add a textview to the map:
textViewMap.put(id, textView);
...
// Retrieve a textview from the map:
textViewMap.get(id);


But, this may have let downs since view id's are not required to be unique and you might get the wrong view. Also, if the id is repeated, it will be overwritten using the map, hence the last view with the same id will be taken.

So Here is a better way to do it

Use tags. View's have their own tags which are strings. Now, as default, a view's tag is empty. This means, we can manipulate it the way we want, and for you, to use it as a unique identifier. Now, the problem is how do we generate a unique id? That's easy, use the current time, as time will never repeat itself.

...
int id = System.currentTimeMillis(); // Use intelli-sense, this might not be the right name of the function
textView.setTag("" + id);
...
// Retrieve the view using the tag
TextView textView = findViewWithTag("" + id);
...


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