Android Location的使用！！

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>