Android: measureText() Return Pixels Based on Scaled Pixels
So I use Paint's measureText() method to measure the width of a segment of text, but I wanted to measure text based on a certain text size. Say I wanted to get the width of a text segment that will be 20 scaled pixels when it occupies a certain TextView. I tried the following:
Paint paint = new Paint();
paint.setTextSize(20);
paint.measureText("sample text");
However, it does not seem to be working. I believe it is returning a width with respect to a smaller text size. I feel like I'm missing something that will make me slap myself in the face an开发者_如何转开发d yell herp derp.
You need to get the densityMultiplier like so:
final float densityMultiplier = getContext().getResources().getDisplayMetrics().density;
final float scaledPx = 20 * densityMultiplier;
paint.setTextSize(scaledPx);
final float size = paint.measureText("sample text");
I do something like this when I have to.
int textSize = 20;
for(int i = 2; i<18 && curTextSize< textSize;i+=2)
{
this.label.setTextSize(i);
curTextSize = this.label.getPaint().measureText(this.label.getText().toString());
}
I don't have enough reputation points to comment on answers but in reference to the comments by @schwiz and @AndreasEK on the accepted answer:
measureText()
, along with getTextBounds()
, does not include padding so it's possible that the solution to their problem is to add the left and right padding (or start and end padding)
final float scaleFactor = getContext().getResources().getDisplayMetrics().density;
final float scaledPx = 20 * scaleFactor;
paint.setTextSize(scaledPx);
final float padding = scaleFactor * (textView.getPaddingStart() + textView.getPaddingEnd());
final float size = paint.measureText("sample text") + padding;
Try
Paint.SetLinearText(true)
That solved the problem for me.
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