TextView加载Html标签，图片显示问题方案解决

1，平时在开发中，遇到一些需要显示简介或者个人信息可能后台直接返回html。但是加载图片 会和后台上传的图片不一样

其实个人思路就是将获得的 drawble ，重新设置宽高，然后加载

本文因为我使用到了databing 和 Glide 配合使用。

<LinearLayout
    android:id="@+id/root_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:orientation="vertical">

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/dimen_15dp"
            android:lineSpacingExtra="@dimen/dimen_5dp"
            android:text="@{viewModel.descriptionField}"
            android:textColor="@{viewModel.isTextColor333?@color/color_333333:@color/color_666666}"
            android:textSize="16sp"

            />
    </android.support.v4.widget.NestedScrollView>
</LinearLayout>

简单的布局文件，只是个简单的TextView套Scroll;

 private void setActivityContent(final String activityContent) {
        new Thread(new Runnable() {

            @Override
            public void run() {
                Html.ImageGetter imageGetter = new Html.ImageGetter() {

                    @Override
                    public Drawable getDrawable(String source) {
                       //如果直接用drawble 
                        Drawable drawable;
                        drawable = getImageNetwork(source);
                        if (drawable != null) {
                            int w = drawable.getMinimumWidth();
                            int h = drawable.getMinimumHeight();
                            int width = UIUtils.getScreenWidth(BaseConfig.getContext()) - UiUtil.dip2px(30); //这边主要是计算了屏幕宽度减去边距的方法 在文章底部给出
                            float scale = ((float) width / w);
                            w = (int) (scale * w);
                            h = (int) (scale * h);
                            drawable.setBounds(0, 0, w, h);
                        } else {
                            return null;
                        }
                        return drawable;
                    }
                };
                CharSequence charSequence = Html.fromHtml(activityContent.trim(), imageGetter, null);
                Message ms = Message.obtain();
                ms.what = 1;
                ms.obj = charSequence;
                mHandler.sendMessage(ms);
            }
        }).start();
    }

    private Handler mHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case 1:
                    CharSequence charSequence = (CharSequence) msg.obj;
                    if (charSequence != null) {
                        descriptionField.set(charSequence);
                    }
                    break;
                default:
                    break;
            }
        }
    };

    /**
     * 连接网络获得相对应的图片 直接通过Glide
     *
     * @param imageUrl
     * @return
     */
    public Drawable getImageNetwork(String imageUrl) {
        URL myFileUrl = null;
        Drawable drawable = null;
        try {
            drawable = Glide.with(AppConfig.getContext()).load(imageUrl).submit().get();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return drawable;
    }

/**
 * 获取屏幕的宽
 *
 * @param context
 * @return
 */
public static int getScreenWidth(Context context) {
    WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    DisplayMetrics dm = new DisplayMetrics();
    wm.getDefaultDisplay().getRealMetrics(dm);
    return dm.widthPixels;
}

/**
 * dip转换成px
 *
 * @param context
 * @param dpValue
 * @return
 */

public static int dip2px(float dpValue) {
    ensureDensity();
    return (int) (dpValue * sDensity + 0.5f);
}