[英]SpannableString with dot under text
I am trying to achive something like this : 我正在尝试达到这样的目标:
There is a string with maximal lenght of 2 and minimal lenght of 1. I would like to create it with a dot under the text. 有一个最大长度为2且最小长度为1的字符串。我想在文本下方添加一个点。 Something like this http://imgur.com/7LKWpVR 像这样的东西http://imgur.com/7LKWpVR
Can this be achived with ImageSpan in textview ? 可以在Textview中使用ImageSpan实现吗?
Use a ReplacementSpan : 使用ReplacementSpan :
public class UnderDotSpan extends ReplacementSpan {
private final float mSize;
private final int mDotColor;
private final int mTextColor;
public UnderDotSpan(Context context) {
super();
TypedArray ta = context.getTheme().obtainStyledAttributes(new int[]{
R.attr.colorAccent,
android.R.attr.textColorPrimary
});
mDotColor = ta.getColor(0, ContextCompat.getColor(context, R.color.colorAccent));
mTextColor = ta.getColor(1, 0);
ta.recycle();
mSize = context.getResources().getDimension(R.dimen.dot_size);
}
@Override
public int getSize(Paint paint, CharSequence text, int start, int end, Paint.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) {
if (TextUtils.isEmpty(text)) {
return;
}
float textSize = paint.measureText(text, start, end);
paint.setColor(mDotColor);
canvas.drawCircle(x + textSize / 2, // text center X
bottom + mSize, // dot center Y
mSize / 2, // radius
paint);
paint.setColor(mTextColor);
canvas.drawText(text, start, end, x, y, paint);
}
}
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