我尝试了 koopuluri 的解决方案,但是当我只想突出显示某些单词时,LineBackgroundSpan 是针对整个段落的。所以我找到了ReplacementSpan,我们可以在其中重写该函数draw
并在文本后面画一个矩形。您必须为其指定文本高度。
/**
* It's like a {@link android.text.style.BackgroundColorSpan} but we don't paint the extra line height.
* <p/>
*/
public class BackgroundColorWithoutLineHeightSpan extends ReplacementSpan
{
private final int mColor;
private final int mTextHeight;
public BackgroundColorWithoutLineHeightSpan(int color, int textHeight)
{
mColor = color;
mTextHeight = textHeight;
}
@Override
public int getSize(Paint paint, CharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
return Math.round(measureText(paint, text, start, end));
}
@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint)
{
int paintColor = paint.getColor();
RectF rect = new RectF(x, top, x + measureText(paint, text, start, end), top + mTextHeight);
paint.setColor(mColor);
canvas.drawRect(rect, paint);
paint.setColor(paintColor);
canvas.drawText(text, start, end, x, y, paint);
}
private float measureText(Paint paint, CharSequence text, int start, int end)
{
return paint.measureText(text, start, end);
}
}