Android 地理服务

1.User Location 能做什么
获取用户位置
追踪用户的移动
2.User Location 的关键API
Location Manager:用于管理Android的用户定位服务;
Location Providers: 提供多种定位方式供开发者选择;


3.获取用户的当前位置
Gps定位:
声明权限:android.permission.ACCESS_FINE_LOCATION
network定位:
声明权限:android.permission.ACCESS_FINE_LOCATION(精确)
或 android.permission.ACCESS_COARSE_LOCATION(不精确)
步骤:
1.在AndroidManifest.xml中声明相应的权限
2.获取LocationManager对象
3.选择LocationProvider
4.绑定LocationListener对象
4.获取最佳的LocationProvider
criteria可以设置一系列的查询条件,用于查找当前设备当中符合条件的LocationProvider
查询条件:
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);//设置为最大精度 
criteria.setAltitudeRequired(true);//要求海拔信息 
criteria.setBearingRequired(true);//要求方位信息 
criteria.setBearingAccuracy(Criteria.ACCURACY_HIGH);//要求方位信息 的精确度
criteria.setCostAllowed(false);//是否允许付费 
criteria.setPowerRequirement(Criteria.POWER_LOW);//对电量的要求
criteria.setSpeedAccuracy(criteria.ACCURACY_HIGH);//对速度的精确度
criteria.setHorizontalAccuracy(Criteria.ACCURACY_HIGH);//对水平的精确度
criteria.setSpeedRequired(true);//要求速度信息
criteria.setVerticalAccuracy(Criteria.ACCURACY_HIGH);//对垂直精度
String providerFalse = locationManager.getBestProvider(criteria, false);//找到最好的Provider不管是否能用。
String providerTrue = locationManager.getBestProvider(criteria, true);//找到最好的能用的Provider。

main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button 
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:id="@+id/buttonProvider"
        android:text="测试当前设备的provider"
        />
    <Button 
        android:layout_below="@id/buttonProvider"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:id="@+id/buttonProviderBest"
        android:text="最好的provider"
        />

    <TextView
        android:id="@+id/AltitudeText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/buttonProviderBest"
        android:layout_below="@+id/buttonProviderBest"
        android:text="海拔/m"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/BearingText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/AltitudeText"
        android:layout_below="@+id/AltitudeText"
        android:layout_marginTop="15dp"
        android:text="方位"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/AltitudeValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/BearingText"
        android:layout_alignRight="@+id/buttonProvider"
        android:text="海拔"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/BearingValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/BearingText"
        android:layout_alignBottom="@+id/BearingText"
        android:layout_alignLeft="@+id/AltitudeValue"
        android:text="方位"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/SpeedValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/SpeedText"
        android:layout_alignBottom="@+id/SpeedText"
        android:layout_alignLeft="@+id/BearingValue"
        android:text="速度 "
        android:textSize="20dp" />

    <TextView
        android:id="@+id/SpeedText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/BearingText"
        android:layout_below="@+id/BearingText"
        android:layout_marginTop="21dp"
        android:text="速度 s/m"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/LongitudeText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/SpeedText"
        android:layout_below="@+id/SpeedText"
        android:layout_marginTop="21dp"
        android:text="经度t"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/LongitudeValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/LongitudeText"
        android:layout_alignBottom="@+id/LongitudeText"
        android:layout_alignLeft="@+id/SpeedValue"
        android:text="经度"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/LatitudeText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/SpeedText"
        android:layout_below="@+id/LongitudeValue"
        android:layout_marginTop="19dp"
        android:text="纬度t"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/LatitudeValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/LatitudeText"
        android:layout_alignBottom="@+id/LatitudeText"
        android:layout_alignLeft="@+id/SpeedValue"
        android:text="纬度"
        android:textSize="20dp" />

</RelativeLayout>

activity.java

package com.yuexin.location01;

import java.util.List;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {

	private Button buttonProvider = null;
	private Button buttonProviderBest = null;
	private LocationManager locationManager ;
	private TextView AltitudeValue= null;
	private TextView BearingValue= null;
	private TextView SpeedValue= null;
	private TextView LongitudeValue= null;
	private TextView LatitudeValue= null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		AltitudeValue = (TextView) findViewById(R.id.AltitudeValue);
		BearingValue = (TextView) findViewById(R.id.BearingValue);
		SpeedValue = (TextView) findViewById(R.id.SpeedValue);
		LongitudeValue = (TextView) findViewById(R.id.LongitudeValue);
		LatitudeValue = (TextView) findViewById(R.id.LatitudeValue);
		
		buttonProvider = (Button) findViewById(R.id.buttonProvider);
		buttonProviderBest = (Button) findViewById(R.id.buttonProviderBest);
		buttonProvider.setOnClickListener(new ButtonListener());
		buttonProviderBest.setOnClickListener(new ButtonListrnerBest());
		//得到LocationManager对象
		locationManager = (LocationManager) MainActivity.this.getSystemService(LOCATION_SERVICE);
		locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new LocationListener());
	}
	class ButtonListrnerBest implements OnClickListener{
		@SuppressLint("NewApi")
		@Override
		public void onClick(View arg0) {
			Criteria criteria = new Criteria();
			criteria.setAccuracy(Criteria.ACCURACY_FINE);//设置为最大精度 
			criteria.setAltitudeRequired(true);//要求海拔信息 
			criteria.setBearingRequired(true);//要求方位信息 
			criteria.setBearingAccuracy(Criteria.ACCURACY_HIGH);//要求方位信息 的精确度
			criteria.setCostAllowed(false);//是否允许付费 
			criteria.setPowerRequirement(Criteria.POWER_LOW);//对电量的要求
			criteria.setSpeedAccuracy(criteria.ACCURACY_HIGH);//对速度的精确度
			criteria.setHorizontalAccuracy(Criteria.ACCURACY_HIGH);//对水平的精确度
			criteria.setSpeedRequired(true);//要求速度信息
			criteria.setVerticalAccuracy(Criteria.ACCURACY_HIGH);//对垂直精度
			String providerFalse = locationManager.getBestProvider(criteria, false);//找到最好的Provider不管是否能用。
			String providerTrue = locationManager.getBestProvider(criteria, true);//找到最好的能用的Provider。
			//locationManager.requestLocationUpdates(providerTrue, 0, 0, new LocationListener());
			System.out.println("providerFalse---->"+providerFalse);
			System.out.println("providerTrue---->"+providerTrue);
		}
	}
	class ButtonListener implements OnClickListener{

		@Override
		public void onClick(View arg0) {
			/*
			//得到LocationManager对象
			LocationManager locationManager = (LocationManager) MainActivity.this.getSystemService(LOCATION_SERVICE);
//			1.定义当前使用的LocationManager
//			2.定义两次定位的间隔大小。
//			3.两次定位之间的最小距离
			locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new LocationListener());
			*/
			
			List<String> allProvider = locationManager.getAllProviders();
			for (int i = 0; i < allProvider.size(); i++) {
				System.out.println(allProvider.get(i));
			} 
		}
		
	}
	
	private class LocationListener implements android.location.LocationListener{

		@Override
		public void onLocationChanged(Location location) {
			// 设备位置发生改变Location为对象的位置
			System.out.println(location.getLongitude());//经度
			System.out.println(location.getLatitude());//维度
			AltitudeValue.setText(String.format("%.8f",location.getAltitude()));
			BearingValue.setText(String.format("%.8f",location.getBearing()));
			SpeedValue.setText(String.format("%.8f",location.getSpeed()));
			LongitudeValue.setText(String.format("%.8f",location.getLongitude()));
			LatitudeValue.setText(String.format("%.8f",location.getLatitude()));
		}

		@Override
		public void onProviderDisabled(String arg0) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void onProviderEnabled(String arg0) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
			// TODO Auto-generated method stub
			
		}
		
	}

	
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.yuexin.location01"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.yuexin.location01.MainActivity"
            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>

</manifest>



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