How to programmatically set a TextView width and height to Wrap Content

Question

I am writing a table programmatically from an SQLite database.

In a loop I am generating needed TextViews and am attempting to wrap the data in a TextView called descCol when the data is longer than the existing screen allows.

Suggestions to do this were offered in the following link: Setting width to wrap_content for TextView through code

However when using either of the suggested methods I'm getting a java.lang.NullPointerException.

Here's my code example:

TextView descCol = new TextView(this);
descCol.getLayoutParams().width = ViewGroup.LayoutParams.WRAP_CONTENT;

In this case debug shows it throws a java.lang.NullPointerException on the getLayoutParams() line.

Also I've tried:

TextView descCol = new TextView(this);
ViewGroup.LayoutParams params = descCol.getLayoutParams();
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
params.width = ViewGroup.LayoutParams.WRAP_CONTENT;
descCol.setLayoutParams(params);

In this case debug shows it throws a java.lang.NullPointerException on the params.height line.

Debug shows that in either case after performing the getLayoutParams() method, params is equal to null, apparently throwing the exception.

I've tried to assign other parameters first to descCol (textcolor, text, gravity etc.) prior to the getLayoutParams() but get the same result.

Suggestions as to how to avoid the java.lang.NullPointerException would be appreciated.

Answer 1

Also I was able to accomplish my task programmatically by simply using the setWidth and setHeight methods.

textview.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
textview.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);

Answer 2

Try this way:

  LinearLayout.LayoutParams textParam = new LinearLayout.LayoutParams
                        (LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f);

    textView.setLayoutParams(textParam);