大家好,今天说说Android Location,Location在Android开发中还是经常用到的,比如通过经纬度获取天气,根据Location获取所在地区详细地址(比如Google Map开发)等。而在Android中通过LocationManager来获取Location,通常获取Location有GPS获娶WIFI获龋
我今天做一个简单的小Demo,来教大家如何获取Location,从而获取经纬度。下一节将教大家通过Location来获取Address。
第一步:创建一个Android工程命名为LocationDemo
第二步:修改main.xml代码如下:
<?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:id="@+id/longitude"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="longitude:"
/>
<TextView
android:id="@+id/latitude"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="latitude:"
/>
</LinearLayout>
第三步:修改LocationDemo.java,代码如下:
package com.android.tutor;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
public class LocationDemo extends Activity {
private TextView longitude;
private TextView latitude;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
longitude = (TextView) findViewById(R.id.longitude);
latitude = (TextView) findViewById(R.id.latitude);
Location mLocation = getLocation(this);
longitude.setText("Longitude: " + mLocation.getLongitude());
latitude.setText("Latitude: " + mLocation.getLatitude());
}
// Get the Location by GPS or WIFI
public Location getLocation(Context context) {
LocationManager locMan = (LocationManager) context
.getSystemService(Context.LOCATION_SERVICE);
Location location = locMan
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location == null) {
location = locMan
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
return location;
}
}
第四步:增加权限,修改AndroidManifest.xml代码如下(第14行为所增行):
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.tutor" android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".LocationDemo" 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-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
</manifest>
第五步:运行LocationDemo工程,所得效果如下(真机深圳测试):