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

 

 

 

package com.example.test;

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;
		}
	}
}

 

<?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="match_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fastScrollEnabled="true"
        >
    </ListView>
</LinearLayout>