[Android Pro] ListView,GridView之LayoutAnimation特殊动画的实现

2022-11-15 07:40:43

转载自：http://gundumw100.iteye.com/blog/1874545

LayoutAnimation干嘛用的？不知道的话网上搜一下。
Android的Animation之LayoutAnimation使用方法

有两种用法，我的通常写在代码中，像下面这样：

    /**

         * Layout动画

         *

         * @return

         */

        protected LayoutAnimationController getAnimationController() {

            int duration=300;

            AnimationSet set = new AnimationSet(true);  

            Animation animation = new AlphaAnimation(0.0f, 1.0f);

            animation.setDuration(duration);

            set.addAnimation(animation);  

            animation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,

                    Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,

                    -1.0f, Animation.RELATIVE_TO_SELF, 0.0f);

            animation.setDuration(duration);

            set.addAnimation(animation);  

            LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);

            controller.setOrder(LayoutAnimationController.ORDER_NORMAL);

            return controller;

        }

应用的时候只需这样：

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

listView.setLayoutAnimation(getAnimationController());

adapter = new ListViewAdapter(stores);

listView.setAdapter(adapter);

这样一个简单的LayoutAnimation就完成了。

别看到这里就以为文章就完了，以上都是些小玩意。呵呵，还有更厉害的！

你想设置更炫的动画吗？LayoutAnimation通常是Item一个一个的出现，有某种规律的。想让每个Item都有自己的动画吗？那就继续看下去。

.......

private int duration=1000;

        private Animation push_left_in,push_right_in;

        private Animation slide_top_to_bottom,slide_bottom_to_top;

        public ListViewAdapter(ArrayList<Store> list) {

            this.list = list;

            push_left_in=AnimationUtils.loadAnimation(context, R.anim.push_left_in);

            push_right_in=AnimationUtils.loadAnimation(context, R.anim.push_right_in);

            slide_top_to_bottom=AnimationUtils.loadAnimation(context, R.anim.slide_top_to_bottom);

            slide_bottom_to_top=AnimationUtils.loadAnimation(context, R.anim.slide_bottom_to_top);

        }

........

@Override

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

            // TODO Auto-generated method stub

            ViewHodler hodler;

            if (convertView == null) {

                hodler = new ViewHodler();

                convertView = LayoutInflater.from(context).inflate(

                        R.layout.simple_item_7_for_main, null);

                ........

                convertView.setTag(hodler);

                if (position % 2 == 0) {

                    push_left_in.setDuration(duration);

                    convertView.setAnimation(push_left_in);

                } else {

                    push_right_in.setDuration(duration);

                    convertView.setAnimation(push_right_in);

                }

                /*if(position==0){

                    slide_bottom_to_top.setDuration(duration);

                    convertView.setAnimation(slide_bottom_to_top);

                }

                else{

                    slide_top_to_bottom.setDuration(duration);

                    convertView.setAnimation(slide_top_to_bottom);

                }*/

            }else{

                hodler = (ViewHodler) convertView.getTag();

            }

........

            return convertView;

        }

看见上面的动画设置了吗？将动画写在getView()中，这样可以设置很多不同的动画。其实这不属于LayoutAnimation的范畴了。
你可以试一下，如果设计好的话，可以有比LayoutAnimation更酷的效果。

我这里只试了两种效果。

下面是我的动画文件，共四个：

第一种效果：item分别从左右两侧滑入效果。

push_left_in.xml

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

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

    <translate android:fromXDelta="-100%p" android:toXDelta="0" android:duration="300"/>

    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" />

</set>

push_right_in.xml

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

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

    <translate android:fromXDelta="100%p" android:toXDelta="0" android:duration="300"/>

    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" />

</set>

第2种效果：第一个item从下往上滑入，其他Item从上往下滑入效果，这个效果如果单个Item比较高（height）的话效果非常酷（卡牛的老版本好像用的就是这种效果）。
slide_bottom_to_top.xml

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

<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator">

    <translate android:fromYDelta="100%" android:toXDelta="0" android:duration="300" />

    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" />

</set>

slide_top_to_bottom.xml

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

<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator">

    <translate android:fromYDelta="-100%" android:toXDelta="0" android:duration="300" />

    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" />

</set>

另外一篇：
这个不是我写的。

GridView的item从上下左右飞入

import java.util.Random;

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.view.animation.Animation;

import android.view.animation.TranslateAnimation;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.GridView;

import android.widget.ImageView;

public class ZdemoActivity extends Activity {

 private GridView gv;

 private Button btn;

 private TranslateAnimation taLeft, taRight, taTop, taBlow;

 private int[] imgList = new int[15];

 private MyAdapter mAdapter;

 private LayoutInflater mInflater;

 @Override

 public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

  this.InitView();

  this.InitAnima();

  this.InitData();

 }

 private void InitAnima() {

  // TODO Auto-generated method stub

  taLeft = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 1.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f);

  taRight = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -1.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f);

  taTop = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, 1.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f);

  taBlow = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f,

    Animation.RELATIVE_TO_PARENT, -1.0f,

    Animation.RELATIVE_TO_PARENT, 0.0f);

  taLeft.setDuration(1000);

  taRight.setDuration(1000);

  taTop.setDuration(1000);

  taBlow.setDuration(1000);

 }

 private void InitData() {

  // TODO Auto-generated method stub

  for (int i = 0; i < 15; i++) {

   imgList[i] = R.drawable.ic_launcher;

  }

  mAdapter = new MyAdapter();

  gv.setAdapter(mAdapter);

 }

 private void InitView() {

  // TODO Auto-generated method stub

  gv = (GridView) findViewById(R.id.gridView1);

  btn = (Button) findViewById(R.id.button1);

  btn.setOnClickListener(new OnClickListener() {

   @Override

   public void onClick(View v) {

    // TODO Auto-generated method stub

    mAdapter = null;

    mAdapter = new MyAdapter();

    gv.setAdapter(mAdapter);

    mAdapter.notifyDataSetChanged();

   }

  });

  mInflater = (LayoutInflater) this

    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

 }

 private class MyAdapter extends BaseAdapter {

  @Override

  public int getCount() {

   // TODO Auto-generated method stub

   return imgList.length;

  }

  @Override

  public Object getItem(int position) {

   // TODO Auto-generated method stub

   return imgList[position];

  }

  @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

   ViewHolder holder = null;

   if (convertView == null) {

    convertView = mInflater.inflate(R.layout.item, null);

    holder = new ViewHolder();

    holder.image = (ImageView) convertView

      .findViewById(R.id.imageView1);

    convertView.setTag(holder);

   } else {

    holder = (ViewHolder) convertView.getTag();

   }

   int imgID = imgList[position];

   holder.image.setImageResource(imgID);

   Random ran = new Random();

   int rand = ran.nextInt(4);

   switch (rand) {

   case 0:

    convertView.startAnimation(taLeft);

    break;

   case 1:

    convertView.startAnimation(taRight);

    break;

   case 2:

    convertView.startAnimation(taTop);

    break;

   case 3:

    convertView.startAnimation(taBlow);

    break;

   }

   return convertView;

  }

  class ViewHolder {

   public ImageView image;

  }

 }

}

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