1.ViewPager2和父布局添加 android:clipChildren=”false” 属性
2.ViewPager2左右两侧增加Margin
3.ViewPager2的OffscreenPageLimit设置为大于等于1的值
binding.viewPager.setOffscreenPageLimit(1);
4.ViewPager2设置PageTransformer
binding.viewPager.setPageTransformer(new GalleryTransformer());
import android.view.View;
import androidx.viewpager2.widget.ViewPager2;
public class GalleryTransformer implements ViewPager2.PageTransformer {
public static float MIN_ALPHA = 0.8f;
public static float MIN_SCALE = 0.8f;
@Override
public void transformPage(View page, float position) {
if (position < -1 || position > 1) {
page.setAlpha(MIN_ALPHA);
page.setScaleX(MIN_SCALE);
page.setScaleY(MIN_SCALE);
} else if (position <= 1) { // [-1,1]
float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
float scaleX;
if (position < 0) {
scaleX = 1 + 0.1f * position;
} else {
scaleX = 1 - 0.1f * position;
}
page.setScaleX(scaleX);
page.setScaleY(scaleX);
page.setAlpha(MIN_ALPHA + (scaleFactor - MIN_SCALE) / (1 - MIN_SCALE) * (1 - MIN_ALPHA));
}
}
}
参考资料:
Android使用ViewPager2中遇到的问题(使用ViewPager2实现画廊效果)
万能ViewPager2适配器–SmartViewPager2Adapter