android之用户定位（一）

1、User Location 能做什么
1) 获取用户的位置
2)追踪用户的移动

2、User Location的关键API
1)LocationManager：用于光了android的用户定位服务
2) LocationProvider:提供多种定位方式，供开发者选择

3、定位方式的分类：
1)GPS定位：使用GPS卫星进行定位，需要在androidManifest.xml文件中添加如下权限声明：
android.permission.ACCESS_FINE_LOCTION
2)NETWORK定位
使用信号接收塔和Wi_Fi介入定进行定位，需要在需要在androidManifest.xml文件中添加如下权限声明：
android.permission.ACCESS_FINE_LOCTION
或
android.permission.ACCESS_COARSE_LOCTION

4、获取用户当前的位置的步骤
a.在androidManifest.xml中声明相应的权限
b.获取lacationManager的对象
c.选择LocationProvider
d.绑定LocationListener对象

androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="test.gps01"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".TestGPS01Activity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
</manifest>

布局文件main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
    <Button 
    android:id="@+id/button"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="测试"
    />
</LinearLayout>

mainActivity文件：

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class TestGPS01Activity extends Activity {
    /** Called when the activity is first created. */
	private Button button = null;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        button = (Button)findViewById(R.id.button);
        button.setOnClickListener(new ButtonListener());
    }
    private class ButtonListener implements OnClickListener
    {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			//获取LocationManager对象
			LocationManager locationManager = (LocationManager)TestGPS01Activity.this.getSystemService(Context.LOCATION_SERVICE);
			locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new TestLocationListener());
		}
    	
    }
    private class TestLocationListener implements LocationListener
    {

		@Override
		public void onLocationChanged(Location location) {
			// TODO Auto-generated method stub
			System.out.println(location.getLongitude());
			System.out.println(location.getLatitude());
		}

		@Override
		public void onProviderDisabled(String provider) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void onProviderEnabled(String provider) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void onStatusChanged(String provider, int status, Bundle extras) {
			// TODO Auto-generated method stub
			
		}
    	
    }
    
}