在Android 2.2以后才可使用

	/**
	 * Gets the state of GPS location.
	 * 
	 * @param context
	 * @return true if enabled.
	 */
	private static boolean getGpsState(Context context) {
		ContentResolver resolver = context.getContentResolver();
		boolean open = Settings.Secure.isLocationProviderEnabled(resolver,
				LocationManager.GPS_PROVIDER);
		System.out.println("getGpsState:" + open);
		return open;
	}

	/**
	 * Toggles the state of GPS.
	 * 
	 * @param context
	 */
	private void toggleGps(Context context) {
		ContentResolver resolver = context.getContentResolver();
		boolean enabled = getGpsState(context);
		Settings.Secure.setLocationProviderEnabled(resolver,
				LocationManager.GPS_PROVIDER, !enabled);
	}

需要添加权限

<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />

在 AndroidManifest.xml中添加系统权限： android:sharedUserId="android.uid.system" 
 例如：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      android:sharedUserId="android.uid.system"
      >

package com.accesscompany.testlistadapter;

import java.util.ArrayList;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.style.UnderlineSpan;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.LinearLayout.LayoutParams;

public class MainActivity extends Activity {
	private static final String TAG = "MainActivity";
	/**
	 * 设置布局显示属性
	 */
	private LayoutParams mLayoutParams = new LinearLayout.LayoutParams(
			LinearLayout.LayoutParams.WRAP_CONTENT,
			LinearLayout.LayoutParams.WRAP_CONTENT);
	/**
	 * 设置布局显示目标最大化属性
	 */
	private LayoutParams FFlayoutParams = new LinearLayout.LayoutParams(
			LinearLayout.LayoutParams.FILL_PARENT,
			LinearLayout.LayoutParams.FILL_PARENT);

	private ProgressBar progressBar;
	// My Adapter, based on BaseAdapter
	private MyListAdapter mAdapter = null;
	private int lastItem = 0;
	LinearLayout loadingLayout;
	ListView mainList;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		TextView we = (TextView) findViewById(R.id.wen);

		SpannableStringBuilder style = new SpannableStringBuilder("谢红霞");
		style.setSpan(new UnderlineSpan(), 0, 3,
				Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
		we.setText(style);

		LinearLayout layout = new LinearLayout(this);
		// 设置布局 水平方向
		layout.setOrientation(LinearLayout.HORIZONTAL);
		// 进度条
		progressBar = new ProgressBar(this);
		// 进度条显示位置
		progressBar.setPadding(0, 0, 15, 0);
		// 把进度条加入到layout中
		// layout.addView(progressBar, mLayoutParams);
		// 文本内容
		TextView textView = new TextView(this);
		textView.setText("展开更多");
		textView.setGravity(Gravity.CENTER);
		textView.setPadding(100, 10, 0, 20);
		textView.setTextColor(Color.BLUE);
		textView.setTextSize(20);
		// 把文本加入到layout中
		layout.addView(textView, FFlayoutParams);
		// 设置layout的重力方向，即对齐方式是
		layout.setGravity(Gravity.CENTER);

		// 设置ListView的页脚layout
		loadingLayout = new LinearLayout(this);
		loadingLayout.addView(layout, mLayoutParams);
		loadingLayout.setGravity(Gravity.CENTER);
		loadingLayout.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				/*
				 * if (adapter.count<=41) { adapter.count += 10;
				 * adapter.notifyDataSetChanged();
				 * 
				 * }
				 */
				if (mAdapter.mData.size() < 50) {
					for (int i = 0; i < 10; i++) {
						MyListItem list_item = new MyListItem();
						list_item.setTitle("商家XXX" + i);
						list_item.setText("XXXXXXXXXX街道XXX楼" + i);
						mAdapter.addItem(list_item);
					}
					mAdapter.notifyDataSetChanged();
				} else {
					mainList.removeFooterView(loadingLayout);
				}
			}
		});

		mAdapter = new MyListAdapter();
		for (int i = 0; i < 10; i++) {
			MyListItem list_item = new MyListItem();
			list_item.setTitle("title" + i);
			list_item.setText("text" + i);
			mAdapter.addItem(list_item);
		}

		mainList = (ListView) findViewById(R.id.mainlist);
		mainList.addFooterView(loadingLayout);
		mainList.setAdapter(mAdapter);
		mainList.setOnScrollListener(new OnScrollListener() {

			public void onScroll(AbsListView v, int firstVisibleItem,
					int visibleItemCount, int totalItemCount) {
				Log.i(TAG, "Scroll>>>first: " + firstVisibleItem
						+ ", visible: " + visibleItemCount + ", total: "
						+ totalItemCount);
				lastItem = firstVisibleItem + visibleItemCount - 1;
				Log.i(TAG, "Scroll>>>lastItem:" + lastItem);
				// 显示50条ListItem，即0-49，因为onScroll是在“滑动”执行过之后才触发，所以用adapter.count<=41作条件
				/*
				 * if (adapter.count<=41) { if
				 * (firstVisibleItem+visibleItemCount==totalItemCount) {
				 * adapter.count += 10; adapter.notifyDataSetChanged();
				 * listView.setSelection(lastItem); int
				 * currentPage=adapter.count/10;
				 * Toast.makeText(getApplicationContext(), "第"+currentPage+"页",
				 * Toast.LENGTH_LONG).show(); } } else {
				 * listView.removeFooterView(loadingLayout); }
				 */

			}

			@Override
			public void onScrollStateChanged(AbsListView v, int state) {
				if (lastItem == mAdapter.mData.size()
						&& state == OnScrollListener.SCROLL_STATE_IDLE) {
					/*
					 * Log.i(TAG,"ScrollStateChanged>>>state:"+state+"lastItem:"
					 * + lastItem);
					 * //显示50条ListItem，即0-49，因为onScrollStateChanged是在
					 * “拖动滑动”执行过之后才触发，所以用adapter.count<=41作条件 if
					 * (adapter.count<=41) { adapter.count += 10;
					 * adapter.notifyDataSetChanged();
					 * 
					 * }else{ listView.removeFooterView(loadingLayout); }
					 */
				}

			}
		});
	}

	private OnClickListener listenBtnListener = new OnClickListener() {
		public void onClick(View v) {
			Log.i(TAG, "Clicked view: " + v + ", parent: " + v.getParent());
			ViewHolder vh = (ViewHolder) ((View) v.getParent()).getTag();

			AlertDialog.Builder ad = new AlertDialog.Builder(MainActivity.this);
			ad.setTitle("Listen button clicked");
			ad.setMessage("The " + vh.position + " listen button clicked");
			ad.setPositiveButton("Okay", new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					Log.i(TAG, "Listen button click dialog disposing...");
				}
			});
			ad.show();
		}
	};

	private OnClickListener downloadBtnListener = new OnClickListener() {
		public void onClick(View v) {
			Log.i(TAG, "Clicked view: " + v + ", parent: " + v.getParent());
			ViewHolder vh = (ViewHolder) ((View) v.getParent()).getTag();

			AlertDialog.Builder ad = new AlertDialog.Builder(MainActivity.this);
			ad.setTitle("Download button clicked");
			ad.setMessage("The " + vh.position + " download button clicked");
			ad.setPositiveButton("Okay", new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					Log.i(TAG, "Download button click dialog disposing...");
				}
			});
			ad.show();
		}
	};

	private class MyListAdapter extends BaseAdapter {

		private ArrayList<MyListItem> mData = new ArrayList<MyListItem>();
		private LayoutInflater mInflater;

		public MyListAdapter() {
			mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		}

		public void addItem(MyListItem item) {
			mData.add(item);
			notifyDataSetChanged();
		}

		@Override
		public int getCount() {
			return mData.size();
		}

		@Override
		public MyListItem getItem(int position) {
			return mData.get(position);
		}

		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			Log.i(TAG, "getView " + position + " " + convertView + "; parent: "
					+ parent);
			ViewHolder holder = null;
			if (convertView == null) {
				convertView = mInflater.inflate(R.layout.listitem_layout, null);

				holder = new ViewHolder();
				holder.tvTitle = (TextView) convertView
						.findViewById(R.id.itemTitle);
				holder.tvText = (TextView) convertView
						.findViewById(R.id.itemText);

				holder.btnDownload = (TextView) convertView
						.findViewById(R.id.btnDownload);
				holder.position = position;
				convertView.setTag(holder);
			} else {
				holder = (ViewHolder) convertView.getTag();
			}
			holder.tvTitle.setText(mData.get(position).getTitle());
			holder.tvText.setText(mData.get(position).getText());
			holder.btnDownload.setText("不完整");

			return convertView;
		}

	}

	public class ViewHolder {
		public TextView tvTitle;
		public TextView tvText;

		public TextView btnDownload;
		public int position;
	}
}

package com.accesscompany.testlistadapter;

public class MyListItem {
	private String title = null;
	private String text = null;
	
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public String getText() {
		return text;
	}
	public void setText(String text) {
		this.text = text;
	}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/RelativeLayout01"
	android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_height="100dip">

	<TextView android:text="TextView01" android:layout_height="wrap_content"
		android:textSize="18dip" android:text
		android:layout_marginLeft="13dip" android:layout_marginTop="10dip"
		android:textColor="@color/blue" android:layout_width="200dip"
		android:id="@+id/itemTitle" />

	<TextView android:text="TextView02" android:textColor="@color/black"
		android:textSize="18dip" android:layout_height="wrap_content"
		android:layout_marginBottom="10dip"
		android:paddingBottom="10dip"
		android:layout_marginLeft="13dip"
		android:layout_width="200dip" android:layout_below="@+id/itemTitle"
		android:id="@+id/itemText" />

	<TextView android:layout_width="60dip" android:layout_height="wrap_content"
		android:id="@+id/btnDownload" android:layout_alignParentRight="true"
		android:layout_centerVertical="true" android:focusable="false"
		android:textColor="@color/black"
		android:scaleType="fitCenter" />



</RelativeLayout>  

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:background="@drawable/transparent_background"
	android:layout_width="fill_parent" android:layout_height="fill_parent">

	<LinearLayout android:layout_width="wrap_content"
		android:orientation="horizontal" android:layout_height="50dip">
		<TextView android:text="重新定位" android:layout_width="220dip"
			android:textColor="@color/blue" android:textSize="20dip"
			android:paddingLeft="5dip" android:paddingTop="5dip"
			android:layout_height="wrap_content" />

		<TextView android:text="新建商家" android:layout_width="wrap_content"
		android:id="@+id/wen"
			android:layout_height="wrap_content" android:textColor="@color/blue"
			android:textSize="20dip" android:paddingLeft="5dip"
			android:paddingTop="5dip" android:layout_alignParentRight="true" />

	</LinearLayout>
	
		<LinearLayout android:layout_width="wrap_content"
		android:orientation="horizontal" android:layout_height="50dip">
		<EditText  android:layout_width="200dip"
	         android:layout_marginLeft="20dip" android:id="@+id/at"
			android:textColor="@color/black" android:textSize="20dip"
			android:paddingLeft="5dip" android:paddingTop="5dip"
			android:layout_height="wrap_content" />

		<Button android:text="搜索" android:layout_width="80dip"
			android:layout_height="wrap_content" android:textColor="@color/black"
			android:textSize="20dip" android:paddingLeft="5dip"
			android:paddingTop="5dip" android:layout_alignParentRight="true" />

	</LinearLayout>

	<ListView android:layout_width="wrap_content"
		android:layout_height="300dip" android:cacheColorHint="#00000000"
		android:divider="#000000" android:dividerHeight="1px"
		android:stretchMode="columnWidth" android:id="@+id/mainlist">
	</ListView>
	
	<TextView android:text="选项" android:layout_width="wrap_content"
			android:layout_height="wrap_content" android:textColor="@color/blue"
			android:textSize="20dip" android:paddingLeft="235dip"
			android:paddingTop="15dip" android:layout_alignParentRight="true" />

</LinearLayout>