解決辦法查找至：https://segmentfault.com/a/1190000007133405
效果圖如下:
效果圖.png
關(guān)鍵代碼
/**
* 圖文混排時(shí)砂豌，圖片和文字都垂直居中顯示
*/
public static class CenterImageSpan extends ImageSpan {
private WeakReference<Drawable> mDrawableRef;
public CenterImageSpan(Drawable drawable) {
super(drawable);
}
@Override public int getSize(Paint paint, CharSequence text, int start, int end,
Paint.FontMetricsInt fontMetricsInt) {
Drawable drawable = getDrawable();
Rect rect = drawable.getBounds();
if (fontMetricsInt != null) {
Paint.FontMetricsInt fmPaint = paint.getFontMetricsInt();
int fontHeight = fmPaint.descent - fmPaint.ascent;
int drHeight = rect.bottom - rect.top;
int centerY = fmPaint.ascent + fontHeight / 2;
fontMetricsInt.ascent = centerY - drHeight / 2;
fontMetricsInt.top = fontMetricsInt.ascent;
fontMetricsInt.bottom = centerY + drHeight / 2;
fontMetricsInt.descent = fontMetricsInt.bottom;
}
return rect.right;
}
@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y,
int bottom, Paint paint) {
Drawable drawable = getCachedDrawable();
canvas.save();
Paint.FontMetricsInt fmPaint = paint.getFontMetricsInt();
int fontHeight = fmPaint.descent - fmPaint.ascent;
int centerY = y + fmPaint.descent - fontHeight / 2;
int transY = centerY - (drawable.getBounds().bottom - drawable.getBounds().top) / 2;
canvas.translate(x, transY);
drawable.draw(canvas);
canvas.restore();
}
private Drawable getCachedDrawable() {
WeakReference<Drawable> wr = mDrawableRef;
Drawable d = null;
if (wr != null) {
d = wr.get();
}
if (d == null) {
d = getDrawable();
mDrawableRef = new WeakReference<>(d);
}
return d;
}
}
具體使用：
SpannableString mSpannableString = new SpannableString(value);
CenterImageSpan span = new CenterImageSpan(d);
mSpannableString.setSpan(span, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
tv.setText(mSpannableString);
