项目中看到IOS上LIstView在显示隐藏一部分时有一个收缩的特效，但Android自带的没有。就想着能否自定义实现，下面是从项目中提取出来的Demo。
先上效果图：
点击每一行右边的图标显示隐藏；
一、自定义了ExpandableLayout是继承自LinearLayout：
package com.jerome.expand;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.widget.LinearLayout;public class ExpandableLayout extends LinearLayout { private String TAG = ExpandableLayout.class.getSimpleName(); private int layoutHeight = -1; private int OPEN_LAYOUT_TIMES = 20; private int SLEEP_TIME = 15; private float layoutStep = 8; private OnExpandFinishListener onExpand = null; private OnCollapseFinishListener onCollapse = null; public interface OnExpandFinishListener { public void onExpandFinish(); } public interface OnCollapseFinishListener { public void onCollapseFinish(); } public void setOnExpandFinishListener(OnExpandFinishListener oeListener) { onExpand = oeListener; } public void setOnCollapseFinishListener(OnCollapseFinishListener ocListener) { onCollapse = ocListener; } public void setLayoutHeight(int height) { layoutHeight = height; layoutStep = 1.0f * layoutHeight / OPEN_LAYOUT_TIMES; } public ExpandableLayout(Context context) { super(context); } public ExpandableLayout(Context context, AttributeSet attrs) { super(context, attrs); } public void collapse() { new Thread() { public void run() { for (int i = 0; i < OPEN_LAYOUT_TIMES + 1; i++) { final int ii = i; post(new Thread() { public void run() { LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, (int) ((OPEN_LAYOUT_TIMES -ii) * layoutStep)); setLayoutParams(params); if (ii == OPEN_LAYOUT_TIMES) { setVisibility(View.GONE); if(null!=onCollapse){ onCollapse.onCollapseFinish(); } } } }); try { Thread.sleep(SLEEP_TIME); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); } public void expand() { if (layoutHeight <= 0) { return; } android.widget.LinearLayout.LayoutParams params = new android.widget.LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, 0); setLayoutParams(params); setVisibility(View.VISIBLE); new Thread() { public void run() { for (int i = 0; i < OPEN_LAYOUT_TIMES + 1; i++) { final int ii = i; post(new Thread() { public void run() { LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,(int) (ii * layoutStep)); setLayoutParams(params); if (ii == OPEN_LAYOUT_TIMES) { if(null!=onExpand){ onExpand.onExpandFinish(); } } } }); try { Thread.sleep(SLEEP_TIME); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); }}二、在Listview的Item配置文件中使用：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <TextView android:id="@+id/list_item_text" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginTop="10dp" android:layout_weight="1" android:paddingBottom="5dip" android:textColor="#FFFFFFFF" android:textSize="18dp" /> <ImageView android:id="@+id/list_item_more" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:paddingLeft="10dip" android:src="@drawable/indicate_more_oper_icon_pressed" /> </LinearLayout> <com.jerome.expand.ExpandableLayout android:id="@+id/list_item_more_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#ff303537" android:orientation="horizontal" android:paddingBottom="15dip" android:paddingTop="15dip" android:visibility="gone" > <LinearLayout android:layout_width="0dip" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" android:gravity="center" android:orientation="horizontal" > <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/icon_music_not_collect" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dip" android:text="收藏" android:textColor="#FFFFFFFF" android:textSize="14sp" /> </LinearLayout> <LinearLayout android:layout_width="0dip" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" android:gravity="center" android:orientation="horizontal" > <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/icon_music_delete" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dip" android:gravity="center_horizontal" android:text="删除" android:textColor="#FFFFFFFF" android:textSize="14sp" /> </LinearLayout> </com.jerome.expand.ExpandableLayout></LinearLayout>
三、在代码中使用：
class MyAdapter extends BaseAdapter { List<String> data = new ArrayList<String>(); MyAdapter() { initData(); } private void initData() { for (int i = 0; i < 30; i++) { data.add("第" + i + "行"); } } @Override public int getCount() { return data.size(); } @Override public Object getItem(int position) { return data.get(position); } @Override public long getItemId(int position) { return 0; } @Override public View getView(final int position, View convertView, ViewGroup parent) { final HolderView holder; if (convertView == null) { holder = new HolderView(); convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.list_item, null); holder.text = (TextView)convertView.findViewById(R.id.list_item_text); holder.more = (ImageView)convertView.findViewById(R.id.list_item_more); holder.moreLayout = (ExpandableLayout)convertView.findViewById(R.id.list_item_more_layout); convertView.setTag(holder); } else { holder = (HolderView)convertView.getTag(); } holder.more.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { int visable = holder.moreLayout.getVisibility(); if (visable == View.VISIBLE) { holder.moreLayout.setLayoutHeight(150); holder.moreLayout.setOnCollapseFinishListener(new OnCollapseFinishListener(){ @Override public void onCollapseFinish() { selectedPosition = -1; } }); holder.moreLayout.collapse(); } else { holder.moreLayout.setLayoutHeight(150); holder.moreLayout.expand(); selectedPosition = position;notifyDataSetChanged(); } } }); if (selectedPosition == position) { holder.moreLayout.setVisibility(View.VISIBLE); } else { holder.moreLayout.setVisibility(View.GONE); } holder.text.setText(data.get(position)); return convertView; } }demo见附件！！！