TextView具有lineSpacing时的ImageSpan.ALIGN_BASELINE

Question

我想将我ImageSpan的文本基线对齐,但我还需要在行之间添加一些间距.
问题是,当我添加行间距时,ImageSpan它不会与文本的基线对齐,而是与文本的基线对齐baseline+lineSpacing,因此它看起来比它应该低.

这有解决方法吗？

编辑:进一步说明:

1. 没有 它的样子lineSpacing(箭头是ImageSpan).它与基线正确对齐.
   

2. 如果我添加,它看起来如何 android:lineSpacingMulitiplier="1.2"
   

编辑2代码:
XML:

<com.kushtrim.example.views.CustomTypefaceTextView
    android:id="@+id/descId"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:lines="3"
    android:gravity="center_vertical"
    android:layout_marginLeft="@dimen/_45"
    android:layout_marginTop="@dimen/_6"
    android:layout_marginBottom="@dimen/_20"
    app:font_type="merriweather_regular"
    android:textSize="@dimen/f40"
    android:lineSpacingMultiplier="1.2"
    android:textColor="@color/black"
    android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit."
    android:ellipsize="end" />

其他相关方法:

    private Spannable getContentText(ContactRaport contactRaport) {
    DateTime dateTime = new DateTime(contactRaport.contactDate);

    String datePart = dateTime.getDayOfMonth() + " " + dateTime.monthOfYear().getAsShortText(new Locale("nl")) + "; ";
    String completeText = datePart + contactRaport.note;

    Typeface font1 = Typeface.createFromAsset(context.getAssets(), "MyFont1.ttf");
    Typeface font2 = Typeface.createFromAsset(context.getAssets(), "MyFont2.ttf");
    SpannableStringBuilder  spannable = new SpannableStringBuilder("XX");
    ImageSpan arrow = getArrowImageSpan(contactRaport);
    spannable.setSpan(arrow, 0, 2, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
    spannable.append(completeText);

    spannable.setSpan(new CustomTypefaceSpan("", font1 ), 2, datePart.length()+1, Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
    spannable.setSpan(new CustomTypefaceSpan("", font2), datePart.length(), completeText.length(), Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
    spannable.setSpan(new ForegroundColorSpan(getContentDateColor(contactRaport)),2, datePart.length()+1, 0);

    return spannable;
}

.

private ImageSpan getArrowImageSpan(ContactRaport contactRaport) {

    Drawable d = null;
    switch (contactRaport.type) {
        ... logic to load the correct drawable
    }


   d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());

    return new ImageSpan(d, ImageSpan.ALIGN_BASELINE);
}

Answer 1

我最近遇到了同样的问题，设法通过改变这个答案来解决它。我无法找到如何从字体度量中获取行高，因此我将其设置为常量浮点数（您也可以从 TextView 中获取它）。

private static class CenterImageSpan extends ImageSpan {

    public CenterImageSpan(Drawable d) {
        super(d, ALIGN_BOTTOM);
    }

    public void draw(@NonNull Canvas canvas, CharSequence text, int start,
                     int end, float x, int top, int y, int bottom,
                     @NonNull Paint paint) {
        Drawable b = getDrawable();
        canvas.save();

        int transY = bottom - b.getBounds().bottom;
        // this is the key
        transY -= paint.getFontMetricsInt().descent / 2;

        // adjust it for the current line height
        transY *= 1 - (LINE_HEIGHT - 1) * 2;

        canvas.translate(x, transY);
        b.draw(canvas);
        canvas.restore();
    }
}