您好，我正在开发一个应用程序，我正在使用 viewpager 通过 viewpager 转换器制作自定义动画，但问题是 存在缩放问题viewpager 页面转换器。我尝试了所有可能的 x 和 y 缩放比例，但问题仍然相同。如果有人可以帮助我，我很难理解这个问题。
下面是我想要达到的效果
更新:
看起来我还没有找到解决方案，但我仍在努力寻找解决方案，因为我几乎已经完成了，只剩下卡片组外观的设计了。
我的页面转换代码
public class CardStackTransformer implements ViewPager.PageTransformer {
private static final float DEFAULT_CURRENT_PAGE_SCALE = 1.0f;
private static final float OTHER_PAGE_SCALE = 0.9f;
private int dimen;
@Override
public void transformPage(@NonNull View view, float position) {
//view.setScaleX(DEFAULT_CURRENT_PAGE_SCALE);
// view.setScaleY(DEFAULT_CURRENT_PAGE_SCALE);
/*dimen = view.getWidth();
int pageWidth = view.getWidth();
final float translateValue = position * -pageWidth;
if (translateValue < -pageWidth) {
view.setTranslationX(translateValue);
}
if (position < -1) {
view.setAlpha(0);
} else if (position <= 0) {
view.setAlpha(1.0f);
view.setTranslationX(view.getWidth() * -position);
view.setTranslationY(0);
view.setScaleX(1);
view.setScaleY(1);
} else if (position <= 1) {
view.setTranslationX(dimen * position);
view.setAlpha(-0.5f * position + 1.0f);
// view.setTranslationX((-dimen / 1.1F) * position);
view.setTranslationX(view.getWidth() * -position);
view.setTranslationY((dimen / 200.09f) * position);
float scaleFactor = OTHER_PAGE_SCALE
+ (1 - OTHER_PAGE_SCALE) * (1 - Math.abs(position));
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor);
//view.setScaleX(OTHER_PAGE_SCALE);
//view.setScaleY(OTHER_PAGE_SCALE);
} else {
view.setAlpha(0);
}*/
view.setScaleX(DEFAULT_CURRENT_PAGE_SCALE);
view.setScaleY(DEFAULT_CURRENT_PAGE_SCALE);
dimen = view.getWidth();
if(position < -1) {
view.setAlpha(0);
} else if(position <= 0) {
view.setAlpha(1.0f);
view.setTranslationX(0);
view.setTranslationY(0);
view.setScaleX(DEFAULT_CURRENT_PAGE_SCALE);
view.setScaleY(OTHER_PAGE_SCALE);
} else if(position <= 1) {
final float scaleFactor = OTHER_PAGE_SCALE + (1 - OTHER_PAGE_SCALE) * (1 - Math.abs(position));
// view.setTranslationX(dimen * -position);
view.setAlpha(-0.5f * position + 1.0f);
view.setTranslationX((-dimen / 1.1F) * position);
view.setTranslationY((dimen / 209.9f)*position);
view.setTranslationX(view.getWidth() * -position);
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor);
} else {
view.setAlpha(0);
}
}
}
最佳答案
检查下面的代码
import android.view.View
import androidx.core.view.ViewCompat
import androidx.viewpager.widget.ViewPager
import kotlin.math.abs
class SliderTransformer() : ViewPager.PageTransformer {
companion object {
private const val TAG = "SliderTransformer"
private const val DEFAULT_TRANSLATION_X = .50f
private const val DEFAULT_TRANSLATION_FACTOR = 1.2f
private const val SCALE_FACTOR = .14f
private const val DEFAULT_SCALE = 1f
private const val ALPHA_FACTOR = .3f
private const val DEFAULT_ALPHA = 1f
}
override fun transformPage(page: View, position: Float) {
page.apply {
ViewCompat.setElevation(page, -abs(position))
val scaleFactor = -SCALE_FACTOR * position + DEFAULT_SCALE
val alphaFactor = -ALPHA_FACTOR * position + DEFAULT_ALPHA
when {
position <= 0f -> {
translationX = DEFAULT_TRANSLATION_X
scaleX = DEFAULT_SCALE
scaleY = DEFAULT_SCALE
alpha = DEFAULT_ALPHA + position
}
position >0 -> {
scaleX = scaleFactor
scaleY = scaleFactor
translationX = -(width / DEFAULT_TRANSLATION_FACTOR) * position
alpha = alphaFactor
}
else -> {
translationX = DEFAULT_TRANSLATION_X
scaleX = DEFAULT_SCALE
scaleY = DEFAULT_SCALE
alpha = DEFAULT_ALPHA
}
}
}
}
}
关于java - 页面转换器的 ViewPager 页面缩放问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50390243/