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>