android添加购物车动画实现

商品列表Adapter

[java] view
plain copy

import android.content.Context;

import android.graphics.drawable.Drawable;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.LinearLayout;

/**

* 商品列表Adapter

* @author antkingwei

*

*/

public class GoodAdapter extends BaseAdapter{

private Context mContext;

private LayoutInflater layoutInflater;

private HolderClickListener mHolderClickListener;

final class ViewHolder {

ImageView imgview;

Button button;

}

public GoodAdapter(Context context){

this.mContext = context;

layoutInflater = LayoutInflater.from(mContext);

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return 16;

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return null;

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

final int selectedId = position;

final ViewHolder viewHolder;

if(convertView ==null){

viewHolder = new ViewHolder();

convertView = layoutInflater.inflate(R.layout.adapter_listview, null);

viewHolder.imgview = (ImageView)convertView.findViewById(R.id.item_img);

viewHolder.button = (Button)convertView.findViewById(R.id.item_button);

convertView.setTag(viewHolder);

}else{

viewHolder =(ViewHolder)convertView.getTag();

}

viewHolder.button.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

if(mHolderClickListener!=null){

int[] start_location = new int[2];

viewHolder.imgview.getLocationInWindow(start_location);//获取点击商品图片的位置

Drawable drawable = viewHolder.imgview.getDrawable();//复制一个新的商品图标

mHolderClickListener.onHolderClick(drawable,start_location);

}

}

});

return convertView;

}

public void SetOnSetHolderClickListener(HolderClickListener holderClickListener){

this.mHolderClickListener = holderClickListener;

}

public interface HolderClickListener{

public void onHolderClick(Drawable drawable,int[] start_location);

}

}

活动类

[java] view
plain copy

package com.example.addshopcart;

import com.example.addshopcart.GoodAdapter.HolderClickListener;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.app.Activity;

import android.content.Context;

import android.graphics.drawable.Drawable;

import android.view.Menu;

import android.view.View;

import android.view.ViewGroup;

import android.view.animation.Animation;

import android.view.animation.Animation.AnimationListener;

import android.view.animation.AnimationSet;

import android.view.animation.RotateAnimation;

import android.view.animation.ScaleAnimation;

import android.view.animation.TranslateAnimation;

import android.widget.Button;

import android.widget.FrameLayout;

import android.widget.ImageView;

import android.widget.ListView;

/**

*

* @author antkingwei

*

*/

public class MainActivity extends Activity {

private ListView listView;

private Button cart_btn;

private GoodAdapter goodAdapter;

//动画时间

private int AnimationDuration = 1000;

//正在执行的动画数量

private int number = 0;

//是否完成清理

private boolean isClean = false;

private FrameLayout animation_viewGroup;

private Handler myHandler = new Handler(){

public void handleMessage(Message msg){

switch(msg.what){

case 0:

//用来清除动画后留下的垃圾

try{

animation_viewGroup.removeAllViews();

}catch(Exception e){

}

isClean = false;

break;

default:

break;

}

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

listView = (ListView)this.findViewById(R.id.listview);

cart_btn = (Button)this.findViewById(R.id.button);

animation_viewGroup = createAnimLayout();

goodAdapter = new GoodAdapter(this);

goodAdapter.SetOnSetHolderClickListener(new HolderClickListener(){

@Override

public void onHolderClick(Drawable drawable,int[] start_location) {

// TODO Auto-generated method stub

doAnim(drawable,start_location);

}

});

listView.setAdapter(goodAdapter);

}

private void doAnim(Drawable drawable,int[] start_location){

if(!isClean){

setAnim(drawable,start_location);

}else{

try{

animation_viewGroup.removeAllViews();

isClean = false;

setAnim(drawable,start_location);

}catch(Exception e){

e.printStackTrace();

}

finally{

isClean = true;

}

}

}

/**

* @Description: 创建动画层

* @param

* @return void

* @throws

*/

private FrameLayout createAnimLayout(){

ViewGroup rootView = (ViewGroup)this.getWindow().getDecorView();

FrameLayout animLayout = new FrameLayout(this);

FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,FrameLayout.LayoutParams.MATCH_PARENT);

animLayout.setLayoutParams(lp);

animLayout.setBackgroundResource(android.R.color.transparent);

rootView.addView(animLayout);

return animLayout;

}

/**

* @deprecated 将要执行动画的view 添加到动画层

* @param vg

* 动画运行的层 这里是frameLayout

* @param view

* 要运行动画的View

* @param location

* 动画的起始位置

* @return

*/

private View addViewToAnimLayout(ViewGroup vg,View view,int[] location){

int x = location[0];

int y = location[1];

vg.addView(view);

FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(

dip2px(this,90),dip2px(this,90));

lp.leftMargin = x;

lp.topMargin = y;

view.setPadding(5, 5, 5, 5);

view.setLayoutParams(lp);

return view;

}

/**

* dip，dp转化成px 用来处理不同分辨路的屏幕

* @param context

* @param dpValue

* @return

*/

private int dip2px(Context context,float dpValue){

float scale = context.getResources().getDisplayMetrics().density;

return (int)(dpValue*scale +0.5f);

}

/**

* 动画效果设置

* @param drawable

* 将要加入购物车的商品

* @param start_location

* 起始位置

*/

private void setAnim(Drawable drawable,int[] start_location){

Animation mScaleAnimation = new ScaleAnimation(1.5f,0.0f,1.5f,0.0f,Animation.RELATIVE_TO_SELF,0.1f,Animation.RELATIVE_TO_SELF,0.1f);

mScaleAnimation.setDuration(AnimationDuration);

mScaleAnimation.setFillAfter(true);

final ImageView iview = new ImageView(this);

iview.setImageDrawable(drawable);

final View view = addViewToAnimLayout(animation_viewGroup,iview,start_location);

view.setAlpha(0.6f);

int[] end_location = new int[2];

cart_btn.getLocationInWindow(end_location);

int endX = end_location[0];

int endY = end_location[1]-start_location[1];

Animation mTranslateAnimation = new TranslateAnimation(0,endX,0,endY);

Animation mRotateAnimation = new RotateAnimation(0, 180, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);

mRotateAnimation.setDuration(AnimationDuration);

mTranslateAnimation.setDuration(AnimationDuration);

AnimationSet mAnimationSet = new AnimationSet(true);

mAnimationSet.setFillAfter(true);

mAnimationSet.addAnimation(mRotateAnimation);

mAnimationSet.addAnimation(mScaleAnimation);

mAnimationSet.addAnimation(mTranslateAnimation);

mAnimationSet.setAnimationListener(new AnimationListener(){

@Override

public void onAnimationStart(Animation animation) {

// TODO Auto-generated method stub

number++;

}

@Override

public void onAnimationEnd(Animation animation) {

// TODO Auto-generated method stub

number--;

if(number==0){

isClean = true;

myHandler.sendEmptyMessage(0);

}

}

@Override

public void onAnimationRepeat(Animation animation) {

// TODO Auto-generated method stub

}

});

view.startAnimation(mAnimationSet);

}

/**

* 内存过低时及时处理动画产生的未处理冗余

*/

@Override

public void onLowMemory() {

// TODO Auto-generated method stub

isClean = true;

try{

animation_viewGroup.removeAllViews();

}catch(Exception e){

e.printStackTrace();

}

isClean = false;

super.onLowMemory();

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

}

activity_main.xml

[html] view
plain copy

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<ListView

android:layout_width="match_parent"

android:layout_height="match_parent"

android:id="@+id/listview"

></ListView>

<Button

android:layout_alignBottom="@+id/listview"

android:layout_centerHorizontal="true"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/button"

android:text="购物车"

/>

</RelativeLayout>

AdapterItem布局

[html] view
plain copy

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

>

<ImageView

android:id="@+id/item_img"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/ic_launcher"

android:layout_alignParentLeft="true"

/>

<Button

android:id="@+id/item_button"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentRight="true"

android:text="添加"

>

</Button>

</RelativeLayout>