大家好,今天说说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Address (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 获取,WIFI 获取。
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 .
首先第一步:
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16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):
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