1. 程式人生 > >Android中為ListView的Item選項設定出場動畫

Android中為ListView的Item選項設定出場動畫

LayoutAnimation用來給ViewGroup的子View新增動畫。

1.在res/anim資料夾建立檔案anim/layout_animation_item.xml,作用於ItemView的動畫

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

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

android:duration="50"

android:fillAfter="false">

<alpha

android:fromAlpha="1.0"

android:toAlpha="0.2" />

<scale

android:fromYScale="1"

android:toYScale="1.5"

android:pivotX="0.5"

android:pivotY="0.5"/>

<scale

android:fromYScale="1.5"

android:toYScale="1.0"

android:pivotX="0.5"

android:pivotY="0.5"/>

<alpha

android:fromAlpha="0.2"

android:toAlpha="0.1"/>

</set>

2.在res/anim資料夾建立檔案anim/layout_animation.xml,作用於ListView

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

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

android:animationOrder="reverse"

android:delay="10"

android:interpolator="@android:interpolator/linear"

android:animation="@anim/layout_animation_item"/>

<!--

android:animationOrder="reverse"表示子Item反向出現

android:delay="10" 延時10毫秒

android:interpolator 設定線性插值器

android:animation="@anim/layout_animation_item" 為item引用View動畫

-->

3.在res/layout新建檔案layout/layout_animation_activity.xml,引用第二步的layout_animation

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

<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">

<!--為ListView設定LayoutAnimation android:layoutAnimation="@anim/layout_animation"-->

<ListView

android:id="@+id/listView"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layoutAnimation="@anim/layout_animation"/>

</RelativeLayout>

4.在Activity中載入ListView.java

public class LayoutAnimationActivity extends Activity {

private ListView ListView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.layout_animation_activity);

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

//建立分享選項

final List<ShareEntity> list=new ArrayList<ShareEntity>();

ShareEntity entity1=new ShareEntity();

entity1.setTvNameStr("支付寶好友");

entity1.setIvIconId(R.drawable.alipay);

list.add(entity1);

ShareEntity entity2=new ShareEntity();

entity2.setTvNameStr("微信好友");

entity2.setIvIconId(R.drawable.weixin);

list.add(entity2);

ShareEntity entity3=new ShareEntity();

entity3.setTvNameStr("朋友圈");

entity3.setIvIconId(R.drawable.weixin_friend);

list.add(entity3);

ShareEntity entity4=new ShareEntity();

entity4.setTvNameStr("新浪微博");

entity4.setIvIconId(R.drawable.sina_weibo);

list.add(entity4);

ShareEntity entity5=new ShareEntity();

entity5.setTvNameStr("支付寶好友");

entity5.setIvIconId(R.drawable.alipay);

list.add(entity5);

ShareEntity entity6=new ShareEntity();

entity6.setTvNameStr("微信好友");

entity6.setIvIconId(R.drawable.weixin);

list.add(entity6);

ShareEntity entity7=new ShareEntity();

entity7.setTvNameStr("朋友圈");

entity7.setIvIconId(R.drawable.weixin_friend);

list.add(entity7);

ShareEntity entity8=new ShareEntity();

entity8.setTvNameStr("新浪微博");

entity8.setIvIconId(R.drawable.sina_weibo);

list.add(entity8);

ShareEntity entity9=new ShareEntity();

entity9.setTvNameStr("支付寶好友");

entity9.setIvIconId(R.drawable.alipay);

list.add(entity9);

ShareEntity entity10=new ShareEntity();

entity10.setTvNameStr("微信好友");

entity10.setIvIconId(R.drawable.weixin);

list.add(entity10);

ShareEntity entity11=new ShareEntity();

entity11.setTvNameStr("朋友圈");

entity11.setIvIconId(R.drawable.weixin_friend);

list.add(entity11);

ShareEntity entity12=new ShareEntity();

entity12.setTvNameStr("新浪微博");

entity12.setIvIconId(R.drawable.sina_weibo);

list.add(entity12);

ShareEntity entity13=new ShareEntity();

entity13.setTvNameStr("支付寶好友");

entity13.setIvIconId(R.drawable.alipay);

list.add(entity13);

ShareEntity entity14=new ShareEntity();

entity14.setTvNameStr("微信好友");

entity14.setIvIconId(R.drawable.weixin);

list.add(entity14);

ShareEntity entity15=new ShareEntity();

entity15.setTvNameStr("朋友圈");

entity15.setIvIconId(R.drawable.weixin_friend);

list.add(entity15);

ShareEntity entity16=new ShareEntity();

entity16.setTvNameStr("新浪微博");

entity16.setIvIconId(R.drawable.sina_weibo);

list.add(entity16);

//設定介面卡

WindowUtilAdapter adapter=new WindowUtilAdapter(list,this);

ListView.setAdapter(adapter);

}

}

5.新建類WindowUtilAdapter.java

public class WindowUtilAdapter extends BaseAdapter {

private List<ShareEntity> list;

private Context context;

public WindowUtilAdapter(List<ShareEntity> list, Context context) {

this.list = list;

this.context = context;

}

@Override

public int getCount() {

return list.size();

}

@Override

public long getItemId(int position) {

return position;

}

@Override

public Object getItem(int position) {

return list.get(position);

}

@Override

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

ViewHolder holder=null;

if(convertView==null){

holder=new ViewHolder();

convertView= LayoutInflater.from(context).inflate(R.layout.window_util_item,parent,false);

holder.tvName=(TextView)convertView.findViewById(R.id.tvName);

holder.ivIcon=(ImageView)convertView.findViewById(R.id.ivIcon);

convertView.setTag(holder);

}else {

holder=(ViewHolder)convertView.getTag();

}

holder.tvName.setText(list.get(position).getTvNameStr());

holder.ivIcon.setBackgroundResource(list.get(position).getIvIconId());

return convertView;

}

static class ViewHolder{

TextView tvName;

ImageView ivIcon;

}

}

6.window_util_item

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

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

android:layout_width="match_parent"

android:layout_height="50dp">

<RelativeLayout

android:layout_width="wrap_content"

android:layout_height="match_parent"

android:gravity="center_vertical"

android:paddingLeft="120dp">

<ImageView

android:id="@+id/ivIcon"

android:layout_width="45dp"

android:layout_height="45dp"

android:padding="20dp"

android:scaleType="fitCenter"

android:layout_marginRight="20dp"/>

<TextView

android:id="@+id/tvName"

android:layout_width="wrap_content"

android:layout_height="match_parent"

android:gravity="center|left"

android:layout_toRightOf="@+id/ivIcon"

android:textColor="@color/blue"

android:textSize="14sp" />

</RelativeLayout>

</LinearLayout>

7.演示效果