android 解析html 图文混排

public class MyImageGetter implements Html.ImageGetter {

    WeakReference<TextView> mTextViewReference;
    Context mContext;

    public MyImageGetter(Context context, TextView textView) {
        mContext = context.getApplicationContext();
        mTextViewReference = new WeakReference<TextView>(textView);
    }

    @Override
    public Drawable getDrawable(String url) {

        URLDrawable urlDrawable = new URLDrawable(mContext);

        // 异步获取图片，并刷新显示内容
        new ImageGetterAsyncTask(url, urlDrawable).execute();

        return urlDrawable;
    }

    public class ImageGetterAsyncTask extends AsyncTask<String, Void, Drawable> {

        WeakReference<URLDrawable> mURLDrawableReference;
        String mUrl;

        public ImageGetterAsyncTask(String url, URLDrawable drawable) {
            mURLDrawableReference = new WeakReference<URLDrawable>(drawable);
            mUrl = url;
        }

        @Override
        protected Drawable doInBackground(String... params) {

            // 下载图片，并且使用缓存
            try {
                Bitmap  bitmap = Glide.with(mContext).load(mUrl).asBitmap().centerCrop().into(100,100).get();
                BitmapDrawable bitmapDrawable = new BitmapDrawable(mContext.getResources(), bitmap);

                Rect bounds = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

                if (mURLDrawableReference.get() != null) {
                    mURLDrawableReference.get().setBounds(bounds);
                }
                bitmapDrawable.setBounds(bounds);
                return bitmapDrawable;
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }

        }

        @Override
        protected void onPostExecute(Drawable result) {
            if (null != result) {
                if (mURLDrawableReference.get() != null) {
                    mURLDrawableReference.get().drawable = result;
                }
                if (mTextViewReference.get() != null) {
                    // 加载完一张图片之后刷新显示内容
                    mTextViewReference.get().setText(mTextViewReference.get().getText());
                }
            }
        }
    }


    public class URLDrawable extends BitmapDrawable {
        protected Drawable drawable;

        public URLDrawable(Context context) {
            // 设置默认大小和默认图片
            Rect bounds = new Rect(0, 0, 100, 100);
            setBounds(bounds);
            drawable = context.getResources().getDrawable(R.drawable.morentu);
            drawable.setBounds(bounds);
        }

        @Override
        public void draw(Canvas canvas) {
            if (drawable != null) {
                drawable.draw(canvas);
            }
        }
    }
}

public class MyTagHandler implements Html.TagHandler {

    private Context mContext;

    public MyTagHandler(Context context) {
        mContext = context.getApplicationContext();
    }

    @Override
    public void handleTag(boolean opening, String tag, Editable output, XMLReader xmlReader) {

        // 处理标签<img>
        if (tag.toLowerCase(Locale.getDefault()).equals("img")) {
            // 获取长度
            int len = output.length();
            // 获取图片地址
            ImageSpan[] images = output.getSpans(len-1, len, ImageSpan.class);
            String imgURL = images[0].getSource();

            // 使图片可点击并监听点击事件
            output.setSpan(new ClickableImage(mContext, imgURL), len-1, len, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }

    private class ClickableImage extends ClickableSpan {

        private String url;
        private Context context;

        public ClickableImage(Context context, String url) {
            this.context = context;
            this.url = url;
        }

        @Override
        public void onClick(View widget) {
            // 进行图片点击之后的处理
            ToastUtil.showToast(context,"111",0);
        }
    }
}

 MyImageGetter imageGetter = new MyImageGetter(this,text_reward_description );
        MyTagHandler tagHandler = new MyTagHandler(this);
        text_reward_description.setText(Html.fromHtml(task.getAward_desc(),imageGetter,tagHandler));
        text_reward_description.setMovementMethod(LinkMovementMethod.getInstance());