安卓画廊效果
2022-04-19 本文已影响0人
默默_大魔王
1：效果图
645cffcaf8c68ad7fc2eef256e37a4c.jpg
04a4c299711908a1e90a360e7786b24.jpg
a6dcdda58333bc3ef3666a595fff265.jpg
2：代码
//首先创建一个ZoomOutPageTransformer
public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
//缩小倍数可以调节
private static final float MAX_SCALE = 1f;
private static final float MIN_SCALE = 0.6f;//0.85f
@Override
public void transformPage(@NonNull View page, float position) {
if (position <= 1) {
float scaleFactor = MIN_SCALE + (1 - Math.abs(position)) * (MAX_SCALE - MIN_SCALE);
page.setScaleX(scaleFactor);
if (position > 0) {
page.setTranslationX(-scaleFactor * 2);
} else if (position < 0) {
page.setTranslationX(scaleFactor * 2);
}
page.setScaleY(scaleFactor);
} else {
page.setScaleX(MIN_SCALE);
page.setScaleY(MIN_SCALE);
}
}
}
2：创建activity代码
List<String> urlList = new ArrayList<>();
urlList.add("https://tenfei03.cfp.cn/creative/vcg/800/new/VCG41N697946430.jpg");
urlList.add("https://tenfei04.cfp.cn/creative/vcg/800/new/VCG41N970090320.jpg");
urlList.add("https://tenfei02.cfp.cn/creative/vcg/800/version23/VCG41615107150.jpg");
mViewPager.setAdapter(new FlowerAdapter(this, urlList));
mViewPager.setPageMargin(20);
mViewPager.setOffscreenPageLimit(urlList.size());
mViewPager.setPageTransformer(true, new ZoomOutPageTransformer());//设置画廊模式
3：xml代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/color_f2f2f2"
android:clipChildren="false">
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="@dimen/dp200"
android:layout_height="@dimen/dp200"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:layout_marginBottom="30dp"
android:clipChildren="false"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/img_flower"/>
</android.support.constraint.ConstraintLayout>
4:适配器
public class FlowerAdapter extends PagerAdapter {
private List<String> mData;
private Context mContext;
@Override
public int getCount() {
return mData.size();// 返回数据的个数
}
public FlowerAdapter(Context ctx, List<String> data) {
this.mContext = ctx;
this.mData = data;
}
@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
return view == object;// 过滤和缓存的作用
}
@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
View view = View.inflate(container.getContext(), R.layout.result_flower_item, null);
ImageView imageView = view.findViewById(R.id.iv_photo);
Glide.with(mContext).load(mData.get(position)).into(imageView);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(mContext, "当前条目：" + position, Toast.LENGTH_SHORT).show();
}
});
container.addView(view);//添加到父控件
return view;
}
}
