SpannableString简单的图文混排

 SpannableString spannableString = new SpannableString("点击 按钮有惊喜");

        ImageSpan imageSpan = new ImageSpan(this,R.mipmap.ic_launcher);
        spannableString.setSpan(imageSpan,2,4, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        tv.setText(spannableString);
        Log.i("TextView",tv.getText().toString());

Paste_Image.png

注意：在setSpan方法中，start和end代表的是图片所占位置的开始和结尾。

在任意位置插入

           int index = tv.getSelectionStart();
                        Editable edit = tv.getEditableText();
                        Drawable drawable = BitmapDrawable.createFromPath(resultList.get(0).getPhotoPath());
                        int width = drawable.getIntrinsicWidth();
                        int height = drawable.getIntrinsicHeight();
                        float ratio = (float)height/width;
                        deviceWidth = displayMetrics.widthPixels;
                        drawable.setBounds(0,0,deviceWidth, (int) (deviceWidth*ratio));
                        String str = "\n"+resultList.get(0).getPhotoPath()+"\n";
                        SpannableString spannableString = new SpannableString(str);
                        ImageSpan imageSpan = new ImageSpan(drawable, DynamicDrawableSpan.ALIGN_BASELINE);
                        spannableString.setSpan(imageSpan,1,str.length()-1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

                        if(index< 0 || index >=edit.length()){
                            edit.append(spannableString);
                        }else{
                            edit.insert(index+1,spannableString);
                        }
                      tv.setSelection(index+spannableString.length());

HTML方式实现图文混排

  Html.ImageGetter getImageGetterInstance() {
        Html.ImageGetter imgGetter = new Html.ImageGetter() {
            @Override
            public Drawable getDrawable(String source) {
                int fontH = (int) (getResources().getDimension(
                        R.dimen.textSizeMedium) * 1.5);
                int id = Integer.parseInt(source);
                Drawable d = getResources().getDrawable(id);
                int height = fontH;
                int width = (int) ((float) d.getIntrinsicWidth() / (float) d
                        .getIntrinsicHeight()) * fontH;
                if (width == 0) {
                    width = d.getIntrinsicWidth();
                }
                d.setBounds(0, 0, width, height);
                return d;
            }
        };
        return imgGetter;
    }

主要依赖上面这个类，通过书写html代码来实现图文混排，使用img标签和src属性。tv.append(Html.fromHtml("<img src='"+resultList.get(0).getPhotoPath()+"'/>",getImageGetterInstance(),null));同时注意，source就是在ImageSpan中的那个source。