改变图像的时间间隔

改变图像的时间间隔

本文介绍了Android的:改变图像的时间间隔的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我使用 ImageDownloader 类来从服务器映像和获得使用一个ArrayList这些图像的链接。下载图片后,我设置的图像作为布局背景。所有的工作,但我希望有一个具体的的时间间隔后改变这些图像,并设置为背景不同的图像。我已经经历了很多帖子了这里,但没有得到我想要的。正如我在ArrayList中的所有图片的链接,所以我怎么能设置一个计时器来改变图像,从的ArrayList 。它到来总是让我在<$ c中的第一图片$ C>指数为零连我都设置一个计时器,但同样的图像再次显示?请帮我,如果有人有任何code为例,看看我的code有什么改变呢?

 最后ImagesSerialized项目;
最后ImageView的bgImage =(ImageView的)findViewById(R.id.image);
 ArrayList的&LT; ImagesSerialized&GT;清单;
        控制=(控制器)getApplicationContext();
        名单=(ArrayList中&LT; ImagesSerialized&GT;)control.Table_Images.GetData();

         的for(int i = 0; I&LT;则为list.size();我++)
         {
         项= list.get(ⅰ);
         }




         下载=新ImageDownloader();
         downloader.download(item.imageurl(),bgImage);
 

解决方案

我不知道 ImageLoader的分量,但在一个视图调度计时器是很容易在Android中。 (没有任何额外的对象)

 最后ImageView的bgImage =(ImageView的)findViewById(R.id.image);

...

新的Runnable(){
    INT updateInterval = 1000; // =1秒

    @覆盖
    公共无效的run(){

        //任何code肚里,这里将被执行每一个updateInterval
        //这里改变你的背景

        bgImage.postDelayed(这一点,updateInterval);
    }
}。跑();
 

你愿意,可以改变这个模板,假设我想停止这个定时器,用于这个目的,我必须添加一个stop方法我同步的可运行(此停车方法行为,并不会导致不一致的计时器内codeS):

 的Runnable myRunnable =新的Runnable(){
    INT updateInterval = 1000; // =1秒
    布尔停止= FALSE;

    公共无效停止(){
        this.stop = TRUE;
    }

    @覆盖
    公共无效的run(){

        //任何code肚里,这里将被执行每一个updateInterval
        //这里改变你的背景

        如果(!停止){
            bgImage.postDelayed(这一点,updateInterval);
        }
    }
}。跑();
 

现在我可以通过 myRunnable.stop()停止;

编辑:你应该重复你的网址阵列,并通过其中的一个到你的下载器。它可以通过这个片段code来实现:

  INT ARRAYSIZE =则为list.size();

新的Runnable(){
    INT CURRENTINDEX = 0;
    INT updateInterval = 1000; // =1秒

    @覆盖
    公共无效的run(){

        CURRENTINDEX + = 1;
        如果(CURRENTINDEX == ARRAYSIZE){
            CURRENTINDEX = 0;
        }

        项目= list.get(CURRENTINDEX);
        downloader.download(item.imageurl(),bgImage);

        bgImage.postDelayed(这一点,updateInterval);
    }
}。跑();
 

I am using ImageDownloader class to get images from server and getting these images links using an ArrayList. After downloading the Image I am setting the Image as background of the layout. All is working but I want to change these Images after a specific time interval and set as background different images. I have gone through many posts here but didn't get what I want. As I have all Images links in ArrayList, so how can I set a timer to change the images, coming from that ArrayList.It always show me the first Image at index zero even I have set a timer but the same Image is showing again? Please help me if someone has any code example and see my code what to change there?

final ImagesSerialized item;
final ImageView bgImage=(ImageView) findViewById(R.id.image);
 ArrayList<ImagesSerialized> list;
        control = (Controller) getApplicationContext();
        list = (ArrayList<ImagesSerialized>) control.Table_Images.GetData();

         for(int i=0; i<list.size(); i++)
         {
         item = list.get(i);
         }




         downloader = new ImageDownloader();
         downloader.download(item.imageurl(), bgImage);
解决方案

I do not know about ImageLoader component but scheduling a timer on a view is quite easy in Android.(Without any additional Object)

final ImageView bgImage=(ImageView) findViewById(R.id.image);

...

new Runnable() {
    int updateInterval = 1000; //=one second

    @Override
    public void run() {

        // Any code which goes here will be executed every 'updateInterval'
        // change your background here

        bgImage.postDelayed(this, updateInterval);
    }
}.run();

You can change this template as you wish, suppose I want to stop this timer, for this purpose I have to add a stop method to my runnable(This stop method acts synchronized and do not cause inconsistency in timer inner codes):

Runnable myRunnable = new Runnable() {
    int updateInterval = 1000; //=one second
    boolean stop = false;

    public void stop() {
        this.stop = true;
    }

    @Override
    public void run() {

        // Any code which goes here will be executed every 'updateInterval'
        // change your background here

        if(!stop) {
            bgImage.postDelayed(this, updateInterval);
        }
    }
}.run();

Now I can stop it by myRunnable.stop();

EDIT :You should iterate your array of URLs and pass one of them to your downloader. It can be accomplished by this snippet code:

int arraySize = list.size();

new Runnable() {
    int currentIndex = 0;
    int updateInterval = 1000; //=one second

    @Override
    public void run() {

        currentIndex += 1;
        if(currentIndex == arraySize){
            currentIndex = 0;
        }

        item = list.get(currentIndex);
        downloader.download(item.imageurl(), bgImage);

        bgImage.postDelayed(this, updateInterval);
    }
}.run();

这篇关于Android的:改变图像的时间间隔的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-04 21:59