Android仿一号店货物详情轮播图动画效果
还不是很完全，目前只能点中间图片才能位移，图片外的其他区域没有。。（属性动画），对了，图片加载用得是facebook的一款android图片加载库,感觉非常NB啊，完爆一切。
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1、先看布局
<?xml version="1.0" encoding="utf-8"?>
2、主界面代码
package com.newair.frescotextdemo;
import android.animation.Animator;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import adapter.MyViewPagerAdapter;
import utils.ScreenUtils;
public class MainActivity extends AppCompatActivity {
private ScrollView scrollView;
private LinearLayout ll_container_scroll;//scrollview第一层容器
private LinearLayout ll_bottom_container;//底部容器
private ViewPager viewPager;//滚动列表
private ViewPager viewPager_2;
private MyViewPagerAdapter myViewPagerAdapter;//适配器
private List image_urls;
private int y; //记住位移了多少
private boolean isRunAnimation = false;//判断当前动画是否执行完成
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
initEvent();
}
private void initView() {
scrollView = (ScrollView) findViewById(R.id.scrollView);
ll_container_scroll = (LinearLayout) findViewById(R.id.ll_container_scroll);
ll_bottom_container = (LinearLayout) findViewById(R.id.ll_bottom_container);
viewPager = (ViewPager) findViewById(R.id.viewPager);
viewPager_2 = (ViewPager) findViewById(R.id.viewPager_2);
}
private void initData() {
image_urls = new ArrayList<>();
image_urls.add("/upload/otherpic73/129349.gif");
image_urls.add("/upload/otherpic73/129350.gif");
image_urls.add("/upload/otherpic73/129351.gif");
image_urls.add("/upload/otherpic73/129352.gif");
image_urls.add("/upload/otherpic73/129353.gif");
myViewPagerAdapter = new MyViewPagerAdapter(this, image_urls);
viewPager.setAdapter(myViewPagerAdapter);
viewPager_2.setAdapter(myViewPagerAdapter);
}
private void initEvent() {
//当前页的点击事件
myViewPagerAdapter.setOnCurrentPositionClickListener(new MyViewPagerAdapter.OnCurrentViewClick() {
@Override
public void onCurrentPositionClick(int position) {
if (viewPager.getTag() == null || ((Integer) viewPager.getTag()) == 1) {
showAnimation();
} else {
hideAnimation();
}
}
});
ll_bottom_container.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
hideAnimation();
}
});
}
//显示动画
public void showAnimation() {
if (!isRunAnimation) {
isRunAnimation = true;
int scrollY = scrollView.getScrollY();
y = scrollY + ((ll_container_scroll.getMeasuredHeight() / 2) - (viewPager.getMeasuredHeight() / 2));
viewPager.animate()
.x(0f)
.y(y * 1f)
.setDuration(500)
.setListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
ll_bottom_container.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationEnd(Animator animation) {
isRunAnimation = false;
viewPager.setTag(2);
y = 0;
ll_container_scroll.setVisibility(View.VISIBLE);
viewPager_2.setCurrentItem(viewPager.getCurrentItem(),false);
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
}
}
//关闭动画
public void hideAnimation() {
if (!isRunAnimation) {
viewPager.animate()
.x(0f)
.y(-y * 1f)
.setDuration(500)
.setListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
ll_container_scroll.setVisibility(View.INVISIBLE);
viewPager.setCurrentItem(viewPager_2.getCurrentItem(),false);
}
@Override
public void onAnimationEnd(Animator animation) {
isRunAnimation = false;
viewPager.setTag(1);
y = 0;
ll_bottom_container.setVisibility(View.VISIBLE);
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
}
}
}
3、viewpager的适配器代码
package adapter;
import android.content.Context;
import android.net.Uri;
import android.support.v4.view.PagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.facebook.drawee.view.SimpleDraweeView;
import com.newair.frescotextdemo.R;
import java.util.List;
/**
* Created by ouhimehime on 16/4/28.
* ---------ViewPager适配器----------
*/
public class MyViewPagerAdapter extends PagerAdapter {
public interface OnCurrentViewClick {
void onCurrentPositionClick(int position);
}
private OnCurrentViewClick onCurrentViewClick;
public void setOnCurrentPositionClickListener(OnCurrentViewClick onCurrentViewClick) {
this.onCurrentViewClick = onCurrentViewClick;
}
private Context context;
private List myData;
public MyViewPagerAdapter(Context context, List myData) {
this.context = context;
this.myData = myData;
}
@Override
public int getCount() {
return myData.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, final int position) {
SimpleDraweeView simpleDraweeView = (SimpleDraweeView) LayoutInflater.from(context).inflate(R.layout.image_view, null);
Uri uri = Uri.parse(myData.get(position));
simpleDraweeView.setImageURI(uri);
container.addView(simpleDraweeView);
simpleDraweeView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onCurrentViewClick.onCurrentPositionClick(position);
}
});
return simpleDraweeView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((SimpleDraweeView) object);
}
}
4、facebook的加载图片的控件
<?xml version="1.0" encoding="utf-8"?>
还不是很好，感兴趣的可运行下看看。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。
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