android 选中GridView 中 的item 时进展图片放大的操作

1、在GridView 中我们会遇到当选中某个Item 时想让它处于高亮或者是放大的操作，我们只需要在setOnItemClickListener（） 方法中把相应的position 给传过去。

package com.example.sgridview;import java.util.ArrayList;import java.util.List;import android.annotation.SuppressLint;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.GridView;import android.widget.ImageView;import android.widget.ImageView.ScaleType;public class MainActivity extends Activity {    private GridView gridView;    private MyAdapter adapter = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lists.add(R.drawable.ic_launcher);        lists.add(R.drawable.ic_launcher);        lists.add(R.drawable.ic_launcher);        this.gridView = (GridView) this.findViewById(R.id.gridView);        adapter = new MyAdapter();        this.gridView.setAdapter(adapter);        this.gridView.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> arg0, View arg1, int id, long arg3) {                // TODO Auto-generated method stub                MyAdapter ad = (MyAdapter) arg0.getAdapter();                ad.setNotifyDataChange(id);            }        });    }    private List<Integer> lists = new ArrayList<Integer>();    private class MyAdapter extends BaseAdapter {        private int selectPic = -1;        @Override        public int getCount() {            // TODO Auto-generated method stub            return lists.size();        }        @Override        public Object getItem(int position) {            // TODO Auto-generated method stub            return lists.get(position);        }        @Override        public long getItemId(int position) {            // TODO Auto-generated method stub            return position;        }        public void setNotifyDataChange(int id) {            selectPic = id;            super.notifyDataSetChanged();        }        @SuppressLint("NewApi")        @Override        public View getView(int position, View view, ViewGroup arg2) {            ImageView img = new ImageView(MainActivity.this);            img.setBackgroundResource(lists.get(position));            if (selectPic == position) {                Animation testAnim = AnimationUtils.loadAnimation(MainActivity.this, R.anim.anim);                img.startAnimation(testAnim);            } else {                // the rest                img.setScaleType(ScaleType.CENTER_INSIDE);            }            return img;        }    }}

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"    android:fillAfter="true">    <scale         android:interpolator="@android:anim/accelerate_interpolator"        android:fromXScale="1.0"        android:toXScale="1.4"        android:fromYScale="1.0"        android:toYScale="1.4"        android:pivotX="50%"        android:pivotY="50%"        android:duration="250"        /></set>