字体背景颜色的高度修改
当使用android:lineSpacingExtra="5dp" 后面背景就会变大
public class BetterHighlightSpan extends ReplacementSpan { private int backgroundColor; public BetterHighlightSpan(int backgroundColor) { super(); this.backgroundColor = backgroundColor; } @Override public int getSize(Paint paint, CharSequence text, int start, int end, FontMetricsInt fm) { return Math.round(paint.measureText(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) { // save current color int oldColor = paint.getColor(); // calculate new bottom position considering the fontSpacing float fontSpacing = paint.getFontSpacing(); float newBottom = bottom - fontSpacing; // change color and draw background highlight RectF rect = new RectF(x, top, x + paint.measureText(text, start, end), newBottom); paint.setColor(backgroundColor); canvas.drawRect(rect, paint); // revert color and draw text paint.setColor(oldColor); canvas.drawText(text, start, end, x, y, paint); }}TextView textView = (TextView) findViewById(R.id.textView);SpannableStringBuilder builder = new SpannableStringBuilder("here some text and more of it");builder.setSpan(new BetterHighlightSpan(Color.CYAN), 4, 8, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);textView.setText(builder);?