• Thread与Handler


         好吧,废话就少说了。开始觉着这个线程真的就不费事,后来,到现在。。。嘿嘿,要是牵涉到一些活跃的赋值以及得到东西,为了线程的安全,好像我们都离不开它哦!

    今天,不是要做一个可以从网上动态获取数据的应用嘛,所以,这里在获取网络图片的时候,我遇到一个问题:

        first:网络图片都是URl的,而我等待赋值的这些控件除了ImageView还有Button以及布局。。。。imageview以及button还好说咯可是布局呢?

       也就是说这里必须要将Url转换成Drawable类型的。

       而且是获得多张,于是,我是这样打算的:

            先定义一个数组,然后将这些url全部写出来,然后将他转换成drawable类型的,然后再利用handler去更新界面。。。。不错不错。。。

        其实网上有很多这样关于这两者的代码,可是就是木有获取一连串的字符(url)然后来进行转换的。所以,就记下来了,方便自己,也方便大家嘛。。。

      

    public class MyThread extends Thread {
            String[] str = {
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appStoreLogoImg,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appStoreBackImg,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appStoreListimg,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appStoreListfocusimg,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appListonfocusimg,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appListFloat,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appInfoFloat,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appBoxBorderColor,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appBoxBgColor,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appBorFocusColor,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appBiFocuscolor,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appLeft,
                    WelcomeActivity.getstyleResponse.items.appStoreTheme.appRight };
    
            @Override
            public void run() {
                for (int i = 0; i < str.length; i++) {
    
                    try {
                        URL url = new URL(str[i]);
                        try {
                            bitmap = BitmapFactory.decodeStream(url.openStream());
    
                            bd = new BitmapDrawable(bitmap);
                          
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    Message message = new Message();
                    message.obj = bd;
                    System.out.println("this image message is====>" + bd);
                    message.what = i;
                    System.out.println("this image message   what  is====>" + i);
                    mhand.sendMessage(message);
    
                }
                msgHandler.sendEmptyMessageDelayed(0, 1 * 1000);
            }
    
        }
    
        class mHandler extends Handler {
            public void handleMessage(Message msg) {
                switch (msg.what) {
                case 1:
                    if (acache.getAsDrawable("1") == null) {
                        layoutDraw = ((BitmapDrawable) msg.obj);
                        // mlLayout.setBackground((BitmapDrawable) msg.obj);
                        System.out
                                .println("RRRRRRRRRRRthis layoutdraw is==========>"
                                        + layoutDraw);
                    } else {
                        layoutDraw = (BitmapDrawable) acache.getAsDrawable("1");
                        // mlLayout.setBackground(acache.getAsDrawable("1"));
                        System.out
                                .println("RRRRRRRRRRRthis layoutdraw is==========>"
                                        + layoutDraw);
                    }
    
                    break;
                case 2:
                    isNomal = (BitmapDrawable) msg.obj;
                    System.out.println("11111111111111 nomale is ====>" + isNomal);
                    // MyArrayAdapter.getImg(bd, 2);
                    break;
                case 3:
                    isfouce = (BitmapDrawable) msg.obj;
                    System.out.println("222222222222 fouce is ====>" + isfouce);
    
                    // MyArrayAdapter.getImg(bd, 3);
                    break;
                case 4:
                    isSelected = (BitmapDrawable) msg.obj;
                    System.out.println("3333333333333333 selected is ====>"
                            + isSelected);
                    // MyArrayAdapter.getImg(bd, 4);
                    break;
                case 5:
    
                    break;
                case 6:
                    if (acache.getAsDrawable("6") == null) {
    
                        DetailDraw = ((BitmapDrawable) msg.obj);
                        // detail.setBackground((BitmapDrawable) msg.obj);
                        // detailInfo.setBackground((BitmapDrawable) msg.obj);
                        System.out
                                .println("66666666666666666 is the detail is is ====>"
                                        + DetailDraw);
                    } else {
    
                        DetailDraw = (BitmapDrawable) acache.getAsDrawable("6");
                        // detail.setBackground((BitmapDrawable) acache
                        // .getAsDrawable("6"));
                        // detailInfo.setBackground((BitmapDrawable) acache
                        // .getAsDrawable("6"));
                        System.out.println("66666666666666666666 else is ====>"
                                + DetailDraw);
                    }
    
                    break;
                // color of the image
                case 8:
                    break;
                // color of the image
                case 10:
                    break;
                case 11:
                    DetailInfoFragment.getImg(bd, 11);
                    break;
                case 12:
                    DetailInfoFragment.getImg(bd, 12);
                    break;
    
                }
            }
        };

    这里面的代码 我是完全没做修改了!嘿嘿,看懂了就懂了,其实我这个循环可能会很累赘,大家有什么好的,提提咯!期待。。。

    一切只是为了充实自己!!stay hungry and stay foolish!!
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  • 原文地址:https://www.cnblogs.com/Catherine-Brain/p/3724511.html
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