java - 如何每隔 n 秒更改 imageview 中的图像

Question

我已经制作了一个数组，其中包含 int 中的所有图像，我想在 imageView 中每 3 秒更改一次这些图像，我已经尝试了我能找到的所有解决方案，但显示了一些错误，我无法理解出去 。

java 文件(home.java)

/**
* Created by sukhvir on 17/04/2015.
*/
public class home extends android.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:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

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

Answer 1

实现您的要求的最佳选择是您应该使用 Timer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