Android 高手进阶教程(十四)之----Android Location的使用!!

大家好,今天说说Location , LocationAndroid 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LocationGPS 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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转载自www.cnblogs.com/vvning/p/9430078.html