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MainActivity如下:

package cc.testlistviewscollbar;import java.lang.reflect.Field;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import android.os.Bundle;import android.widget.AbsListView;import android.widget.ListView;import android.widget.SimpleAdapter;import android.app.Activity;import android.graphics.drawable.Drawable;/** * Demo描述: * 利用反射修改ListView的ScollBar图标 *  * 注意事项: * 并不是说这么做就一定会有效果. * 只有当ListView要显示的数据足够多(比如四屏或更多)时才会起到作用. *  * 参考资料: * 1 http://blog.csdn.net/java2009cgh/article/details/7301197 * 2 http://blog.csdn.net/lfdfhl/article/details/10311505 *   Thank you very much * */public class MainActivity extends Activity {	private ListView mListView;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);		init();		setFastScrollBarForListView();	}	private void init(){		mListView=(ListView) findViewById(R.id.listview);        List
   
    
     > list=new ArrayList
     
      
       >();      	HashMap
       
         hashMap=null;      	for (int i = 0; i < 100; i++) {      		hashMap=new HashMap
        
         (); hashMap.put("name", "小明"+i); hashMap.put("phone", "135"+i); hashMap.put("amount","500"+i); list.add(hashMap); } SimpleAdapter adapter=new SimpleAdapter(this, list, R.layout.listviewitem, new String []{"name","phone","amount"}, new int[]{R.id.name,R.id.phone,R.id.amount}); mListView.setAdapter(adapter); } //修改ListView的FastScroller图标 private void setFastScrollBarForListView() { try { Field field = AbsListView.class.getDeclaredField("mFastScroller"); field.setAccessible(true); Object object = field.get(mListView); field = field.getType().getDeclaredField("mThumbDrawable"); field.setAccessible(true); Drawable drawable = (Drawable) field.get(object); drawable = getResources().getDrawable(R.drawable.ic_launcher); field.set(object, drawable); } catch (Exception e) { System.out.println("----> 异常信息:"+e.toString()); e.printStackTrace(); } } }
        
       
      
     
    
   

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