<p>android富文本append网络图片的加载方案</p> 

先占位，加载完之后重绘view

讯享网val builder = SpannableStringBuilder() val width = DpUtil.dp2px(35) val height = DpUtil.dp2px(30) val drawable = URLImageSpanParser(context, view).getDrawable(bean.url_img, width, height) val imgSpan = CenterAlignImageSpan(drawable) val spannableString = SpannableString(“aaaa”) spannableString.setSpan(

imgSpan, 0, spannableString.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE 

) builder.append(spannableString) builder.append(“ ”) textView.setText(builder)

用到的工具类

讯享网

讯享网class URLImageSpanParser(val context : Context?, val tv: TextView?) {

fun getDrawable(url:String?, width:Int, height:Int): Drawable { var urlDrawable = UikitURLDrawable() if(width == 0){ }else{ urlDrawable.setBounds(0, 0,width, height) } loadDrawableAsync(urlDrawable, url, width, height) return urlDrawable } private fun loadDrawableAsync(urlDrawable : UikitURLDrawable, url:String?, width: Int, height: Int){ ImgLoader.displayDrawable(context, url, object : DrawableCallback { override fun onLoadSuccess(drawable: Drawable) { drawable.setBounds(0, 0, width, height) urlDrawable.drawable = drawable urlDrawable.invalidateSelf() tv?.postInvalidate() } override fun onLoadFailed() { } }) } 

}

class UikitURLDrawable:BitmapDrawable(){

讯享网var drawable:Drawable? = null override fun draw(canvas: Canvas) { if(drawable != null){ drawable?.draw(canvas) } } 

}

public class CenterAlignImageSpan extends ImageSpan {

讯享网public CenterAlignImageSpan(Drawable drawable) { super(drawable); } public CenterAlignImageSpan(Bitmap b) { super(b); } @Override public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) { Drawable b = getDrawable(); Paint.FontMetricsInt fm = paint.getFontMetricsInt(); int transY = (y + fm.descent + y + fm.ascent) / 2 - b.getBounds().bottom / 2;//计算y方向的位移 canvas.save(); canvas.translate(x, transY);//绘制图片位移一段距离 b.draw(canvas); canvas.restore(); } 

}

public static void displayDrawable(Context context, String url, final DrawableCallback callback) {

讯享网if (context == null || TextUtils.isEmpty(url)) { return; } try { Glide.with(context).asDrawable().load(new GlideUrl(url, sHeaders)).skipMemoryCache(SKIP_MEMORY_CACHE).into(new SimpleTarget<Drawable>() { @Override public void onResourceReady(@NonNull Drawable resource, @Nullable Transition<? super Drawable> transition) { if (callback != null) { callback.onLoadSuccess(resource); } } @Override public void onLoadFailed(@Nullable Drawable errorDrawable) { if (callback != null) { callback.onLoadFailed(); } } }); } catch (Exception e) { e.printStackTrace(); } 

}

参考文章：Android 使用ImageSpan加载网络图片-CSDN博客