Question

我的申请有问题。我想让我的背景图像自动滑动而不按任何按钮但使用时间间隔。我按照一些文章的一些说明，但他们只是使用按钮滑动背景图像。有人可以帮我编辑代码，以便图像在一段时间内自动滑动吗？感谢

这是我的代码。

Java代码：

int image[] = {R.drawable.backgroundtwo, R.drawable.backgroundthree, R.drawable.backgroundfour};

ImageSwitcher imageSwitcher;
Button button;
Animation slide_in_left, slide_out_right;
int curIndex;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_homepage);

    imageSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher);
    button = (Button) findViewById(R.id.button);

    slide_in_left = AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);
    slide_out_right = AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right);

    imageSwitcher.setInAnimation(slide_in_left);
    imageSwitcher.setOutAnimation(slide_out_right);

    imageSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
        @Override
        public View makeView() {

            ImageView imageView = new ImageView(Homepage.this);
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);

            ViewGroup.LayoutParams params = new ImageSwitcher.LayoutParams(
                    ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT
            );

            imageView.setLayoutParams(params);
            return imageView;
        }
    });

    curIndex = 0;
    imageSwitcher.setImageResource(image[curIndex]);

    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(curIndex == image.length - 1){
                curIndex = 0;
                imageSwitcher.setImageResource(image[curIndex]);
            } else {
                imageSwitcher.setImageResource(image[++curIndex]);
            }
        }
    });

}

Answer 1

您在res文件夹下创建anim文件夹并在anim文件夹下创建一个imgae_animation.xml文件写在imgae_animation.xml

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false" >

<item
android:drawable="@drawable/img1"
android:duration="120"/>
<item
android:drawable="@drawable/img2"
android:duration="120"/>
<item
android:drawable="@drawable/img3"
android:duration="120"/>
<item
</animation-list>

然后将.xml下的此动画添加到imageview

<ImageView
    android:id="@+id/img_home_list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="5dp"
    android:background="@null"
    android:scaleType="fitXY"
    android:adjustViewBounds="true"
    android:contentDescription="@null"
   android:src="@anim/imgae_animation"
   />

图像会在一段时间内自动滑动

1 个答案: