ReplacementSpan
輪郭を描いたスパンを作るために伸ばしました。残念ながら、それらをラップすることはできませんが、アウトラインをいくつかの単語に適用するだけであれば、うまくいくはずです. setSpan(ClickableSpanWithoutUnderline...)
これをクリック可能にするには、これを設定する前に言及したサブクラスを使用するだけです。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_replacement_span);
final Context context = this;
final TextView tv = (TextView) findViewById(R.id.tv);
Spannable span = Spannable.Factory.getInstance().newSpannable("Some string");
span.setSpan(new BorderedSpan(context), 0, span.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
tv.setText(span, TextView.BufferType.SPANNABLE);
}
public static class BorderedSpan extends ReplacementSpan {
final Paint mPaintBorder, mPaintBackground;
int mWidth;
Resources r;
int mTextColor;
public BorderedSpan(Context context) {
mPaintBorder = new Paint();
mPaintBorder.setStyle(Paint.Style.STROKE);
mPaintBorder.setAntiAlias(true);
mPaintBackground = new Paint();
mPaintBackground.setStyle(Paint.Style.FILL);
mPaintBackground.setAntiAlias(true);
r = context.getResources();
mPaintBorder.setColor(Color.RED);
mPaintBackground.setColor(Color.GREEN);
mTextColor = Color.BLACK;
}
@Override
public int getSize(Paint paint, CharSequence text, int start, int end, Paint.FontMetricsInt fm) {
//return text with relative to the Paint
mWidth = (int) paint.measureText(text, start, end);
return mWidth;
}
@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
canvas.drawRect(x, top, x + mWidth, bottom, mPaintBackground);
canvas.drawRect(x, top, x + mWidth, bottom, mPaintBorder);
paint.setColor(mTextColor); //use the default text paint to preserve font size/style
canvas.drawText(text, start, end, x, y, paint);
}
}