Auto Scale TextView Text to Fit within Bounds

Question

I\'m looking for an optimal way to resize wrapping text in a TextView so that it will fit within its getHeight and getWidth bounds. I\'m not simply looking for

Answer 1

Actually a solution is in Google's DialogTitle class... though it's not as effective as the accepted one, it's a lot simpler and is easy to adapt.

public class SingleLineTextView extends TextView {

  public SingleLineTextView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setSingleLine();
    setEllipsize(TruncateAt.END);
  }

  public SingleLineTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
    setSingleLine();
    setEllipsize(TruncateAt.END);
  }

  public SingleLineTextView(Context context) {
    super(context);
    setSingleLine();
    setEllipsize(TruncateAt.END);
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    final Layout layout = getLayout();
    if (layout != null) {
      final int lineCount = layout.getLineCount();
      if (lineCount > 0) {
        final int ellipsisCount = layout.getEllipsisCount(lineCount - 1);
        if (ellipsisCount > 0) {

          final float textSize = getTextSize();

          // textSize is already expressed in pixels
          setTextSize(TypedValue.COMPLEX_UNIT_PX, (textSize - 1));

          super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
      }
    }
  }

}