android listview滚动条样式,Android--ListView滚动条样式

Android--ListView滚动条样式

当ListView的记录超过4页时才会显示滑块

java代码：

package com.example.test0123;

import java.lang.reflect.Field;

import android.app.Activity;

import android.graphics.drawable.Drawable;

import android.os.Bundle;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AbsListView;

import android.widget.BaseAdapter;

import android.widget.ListView;

import android.widget.TextView;

public class TestList extends Activity {

ListView lv;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.list);

lv = (ListView) findViewById(R.id.listView1);

lv.setAdapter(new ListAdapter());

try {

Field f = AbsListView.class.getDeclaredField("mFastScroller");

f.setAccessible(true);

Object o = f.get(lv);

f = f.getType().getDeclaredField("mThumbDrawable");

f.setAccessible(true);

Drawable drawable = (Drawable) f.get(o);

drawable = getResources().getDrawable(R.drawable.ic_launcher);

f.set(o, drawable);

} catch (Exception e) {

throw new RuntimeException(e);

}

}

public class ListAdapter extends BaseAdapter {

public int getCount() {

return 200;

}

public Object getItem(int position) {

return null;

}

public long getItemId(int position) {

return 0;

}

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

TextView tv = new TextView(TestList.this);

tv.setTextSize(30);

tv.setText("aaaaa" + position);

return tv;

}

}

}