java如何每隔n秒在imageview中更改图像

Question

我制作了一个数组，所有图像都是int，我想在imageView中每3秒更改一次这些图像，我尝试了所有我能找到的解决方案，但显示出一些错误，我无法解决

java文件（home.java）

/**
* Created by sukhvir on 17/04/2015.
*/
public class home extends 安卓.support.v4.app.Fragment {

    ImageView MyImageView;
    int[] imageArray = { R.drawable.image1, R.drawable.image2, R.drawable.image3, R.drawable.image4, R.drawable.image5 };

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        /**
         * Inflate the layout for this fragment
        */
        return inflater.inflate(R.layout.home, container, false);
    }
}

xml文件（home.xml）

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
    安卓:orientation="vertical" 安卓:layout_width="match_parent"
    安卓:layout_height="match_parent">

    <ImageView
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content"
        安卓:id="@+id/imageView"
        安卓:layout_gravity="center_horizontal" />
</LinearLayout>

Answer 1

使用CountDownTimer以下是方法：How to make a countdown Timer in android? 并更改onFinish()内的图像视图背景。 希望这对你有帮助

Answer 2

要达到您的要求，最好的选择是使用^{}每3秒更改一次图像，如下所示

// Declare globally
private int position = -1;

/**
 * This timer will call each of the seconds.
 */
Timer mTimer = new Timer();
mTimer.schedule(new TimerTask() {
    @Override
    public void run() {
        // As timer is not a Main/UI thread need to do all UI task on runOnUiThread
        getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                    // increase your position so new image will show
                position++;
                // check whether position increased to length then set it to 0
                // so it will show images in circuler
                if (position >= imageArray.length)
                    position = 0;
                // Set Image
                MyImageView.setImageResource(imageArray[position]);
            }
        });
    }
}, 0, 3000);
// where 0 is for start now and 3000 (3 second) is for interval to change image as you mentioned in question