我的布局中只有一个ImageView
,当检测到gasture事件时,我正在更改其资源。我只想在更改ImageView的资源时显示动画。我可以将ViewFlipper
用于one
ImageView吗?
答案 0 :(得分:59)
对于单个imageview,您可以使用此辅助函数:
public static void ImageViewAnimatedChange(Context c, final ImageView v, final Bitmap new_image) {
final Animation anim_out = AnimationUtils.loadAnimation(c, android.R.anim.fade_out);
final Animation anim_in = AnimationUtils.loadAnimation(c, android.R.anim.fade_in);
anim_out.setAnimationListener(new AnimationListener()
{
@Override public void onAnimationStart(Animation animation) {}
@Override public void onAnimationRepeat(Animation animation) {}
@Override public void onAnimationEnd(Animation animation)
{
v.setImageBitmap(new_image);
anim_in.setAnimationListener(new AnimationListener() {
@Override public void onAnimationStart(Animation animation) {}
@Override public void onAnimationRepeat(Animation animation) {}
@Override public void onAnimationEnd(Animation animation) {}
});
v.startAnimation(anim_in);
}
});
v.startAnimation(anim_out);
}
答案 1 :(得分:14)
以下是使用ImageSwitcher的示例,例如@Konstantin Burov建议:
将此ImageSwitcher
元素添加到xml布局:
<ImageSwitcher
android:id="@+id/slide_trans_imageswitcher"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ImageSwitcher>
在res/anim/
创建进出动画:
动画:
//left_to_right_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<translate android:fromXDelta="0%" android:toXDelta="100%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="700"/>
</set>
在动画中:
//left_to_right_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<translate android:fromXDelta="-100%" android:toXDelta="0%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="700"/>
</set>
在代码中初始化它们:
Animation in = AnimationUtils.loadAnimation(this, R.anim.left_to_right_in);
Animation out = AnimationUtils.loadAnimation(this, R.anim.left_to_right_out);
初始化您的ImageSwitcher
:
private ImageSwitcher imageSwitcher;
imageSwitcher = (ImageSwitcher)findViewById(R.id.slide_trans_imageswitcher);
将动画附加到它:
imageSwitcher.setInAnimation(in);
imageSwitcher.setOutAnimation(out);
现在,每次为imageSwitcher
设置图像资源时,都会切换幻灯片动画。
例如,我们可以每隔X秒更改一次图像:
private int animationCounter = 1;
private Handler imageSwitcherHandler;
imageSwitcherHandler = new Handler(Looper.getMainLooper());
imageSwitcherHandler.post(new Runnable() {
@Override
public void run() {
switch (animationCounter++) {
case 1:
imageSwitcher.setImageResource(R.drawable.image1);
break;
case 2:
imageSwitcher.setImageResource(R.drawable.image2);
break;
case 3:
imageSwitcher.setImageResource(R.drawable.image3);
break;
}
animationCounter %= 4;
if(animationCounter == 0 ) animationCounter = 1;
imageSwitcherHandler.postDelayed(this, 3000);
}
});
答案 2 :(得分:13)
我认为ImageSwitcher是最适合该任务的组件。
答案 3 :(得分:3)
我找到了另一种使用转场可绘制动画的方法(我从here那里得到了想法)
public static void setImageDrawableWithAnimation(ImageView imageView,
Drawable drawable,
int duration) {
Drawable currentDrawable = imageView.getDrawable();
if (currentDrawable == null) {
imageView.setImageDrawable(drawable);
return;
}
TransitionDrawable transitionDrawable = new TransitionDrawable(new Drawable[] {
currentDrawable,
drawable
});
imageView.setImageDrawable(transitionDrawable);
transitionDrawable.startTransition(duration);
}
类似kotlin扩展功能:
fun ImageView.setImageDrawableWithAnimation(drawable: Drawable, duration: Int = 300) {
val currentDrawable = getDrawable()
if (currentDrawable == null) {
setImageDrawable(drawable)
return
}
val transitionDrawable = TransitionDrawable(arrayOf(
currentDrawable,
drawable
))
setImageDrawable(transitionDrawable)
transitionDrawable.startTransition(duration)
}
如果可绘制对象包含透明零件,则此标志对于防止旧的可绘制可见性很有用:
transitionDrawable.setCrossFadeEnabled(true);
答案 4 :(得分:0)
考虑使用API演示应用中提供的Rotate3dAnimation。 查看&gt;动画&gt; 3D过渡
你也可以在{<3}}上提问