package com.mileltd.tg.utils.normal;

import android.graphics.drawable.Drawable;

import android.os.Handler;

import android.os.Message;

import android.text.Html;

import android.util.Log;

import android.widget.TextView;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URL;

/**

 * 加载富文本工具类

 * Created by jamez on 2016-01-25.

 */

public class RichHtmlUtil

{

    TextView tv;

    public RichHtmlUtil(TextView txt_content, final String infointro,final int widthType)

    {

        tv=txt_content;

        final   MyHandler myHandler = new MyHandler(tv);

        Thread t = new Thread(new Runnable() {

            Message msg = Message.obtain();

            @Override

            public void run() {

                // TODO Auto-generated method stub

                /**

                 * 要实现图片的显示需要使用Html.fromHtml的一个重构方法：public static Spanned

                 * fromHtml (String source, Html.ImageGetterimageGetter,

                 * Html.TagHandler

                 * tagHandler)其中Html.ImageGetter是一个接口，我们要实现此接口，在它的getDrawable

                 * (String source)方法中返回图片的Drawable对象才可以。

                 */

                Html.ImageGetter imageGetter = new Html.ImageGetter() {

                    @Override

                    public Drawable getDrawable(String source) {

                        // TODO Auto-generated method stub

                        URL url;

                        Drawable drawable = null;

                        try {

                            url = new URL(source);

                            drawable = Drawable.createFromStream(url.openStream(), null);

                            int iPicWidth= drawable.getIntrinsicWidth();

                            int iPicHeight = drawable.getIntrinsicHeight();

                            int newwidth=0;

                            if(widthType==0)//列表页面，图片宽度只显示为textview宽度的4分之一

                                newwidth=tv.getMeasuredWidth()/4;

                            else //详细页面，图片宽度显示为整个TextView的宽度

                                newwidth=tv.getMeasuredWidth();

                            float newheight=iPicHeight*(newwidth/iPicWidth);//图片宽度和高度等比缩放

                            drawable.setBounds(0, 0, newwidth,(int)newheight);

                        } catch (MalformedURLException e) {

                            // TODO Auto-generated catch block

                            e.printStackTrace();

                        } catch (IOException e) {

                            // TODO Auto-generated catch block

                            e.printStackTrace();

                        }

                        return drawable;

                    }

                };

                CharSequence test = Html.fromHtml(infointro, imageGetter, null);

                msg.what = 0x101;

                msg.obj = test;

                myHandler.sendMessage(msg);

            }

        });

        t.start();

    }

    /*

     * Handler

     * 类应该应该为static类型，否则有可能造成泄露。在程序消息队列中排队的消息保持了对目标Handler类的应用。如果Handler是个内部类，那

     * 么它也会保持它所在的外部类的引用。为了避免泄露这个外部类，应该将Handler声明为static嵌套类，并且使用对外部类的弱应用。

     */

    private static class MyHandler extends Handler

    {

        TextView tv;

        //WeakReference<NewsDetailActivity> mActivity;

        public MyHandler(TextView tv) {

            this.tv=tv;

            // TODO Auto-generated constructor stub

            //mActivity = new WeakReference<NewsDetailActivity>(activity);

        }

        @Override

        public void handleMessage(Message msg) {

            // TODO Auto-generated method stub

            //NewsDetailActivity theActivity = mActivity.get();

            if (msg.what == 0x101) {

                tv.setText((CharSequence) msg.obj);

                Log.i("tl_user","0x101");

            }

            super.handleMessage(msg);

        }

    }

}