activity:
[java]
package com.example.anpro02;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.widget.EditText;
public class MainActivity extends Activity {
private LocationManager locationManager;
private EditText show;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
show = (EditText) findViewById(R.id.e1);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
updateView(location);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 0, new LocationListener() {
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
updateView(locationManager.getLastKnownLocation(provider));
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
updateView(null);
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
updateView(location);
}
});
return true;
}
private void updateView(Location location){
if(location != null){
StringBuffer sbf = new StringBuffer();
sbf.append("实时位置信息：\n经度：");
sbf.append(location.getLongitude());
sbf.append("\n纬度: ");
sbf.append(location.getLatitude());
sbf.append("\n高度：");
sbf.append(location.getAltitude());
sbf.append("\n速度： ");
sbf.append(location.getSpeed());
sbf.append("\n方向： ");
sbf.append(location.getBearing());
sbf.append("\n精度： ");
sbf.append(location.getAccuracy());
show.setText(sbf.toString());
}
}
}
[/java]
布局xml
[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" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<EditText
android:id="@+id/e1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cursorVisible="false"
android:editable="false" />
</RelativeLayout>
[/xml]
加入相关权限[xml]
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.anpro02"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.anpro02.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>[/xml]
如果把该程序与Google Map结合，让程序根据GPS提供的信息实时地显示用户在地图上的位置，即可开发出GPS导航系统。
