Android使用GPS定位及在googlemap添加标记
要使用googlemap,Activity要继承MapActivity. MapActivity是使用的google第三方API,所以要在配置文件中声明. 废话不多说，上代码:
manifest.xml中:
<? xml version="1.0" encoding="utf-8" ?>
< manifest xmlns:android ="http://schemas.android.com/apk/res/android"
package ="com.t2cn.map"
android:versionCode ="1"
android:versionName ="1.0" >
< application android:icon ="@drawable/icon" android:label ="@string/app_name" >
< activity android:name =".MapViewActivity"
android:label ="@string/app_name" >
< intent-filter >
< action android:name ="android.intent.action.MAIN" />
< category android:name ="android.intent.category.LAUNCHER" />
</ intent-filter >
</ activity >
< uses-library android:name ="com.google.android.maps" />
</ application >
< uses-permission android:name ="android.permission.INTERNET" />
< uses-permission android:name ="android.permission.ACCESS_FINE_LOCATION" />
< uses-permission android:name ="android.permission.ACCESS_COARSE_LOCATION" />
</ manifest >
注意一定要加<uses-library android:name="com.google.android.maps" />，并且加在<application></application>中，否则运行时会有classNotFoundException.
Activity:
public class MapViewActivity extends com.google.android.maps.MapActivity{
private LocationListener locationListener;
TextView tv1;
GeoPoint gp;
MapView mapView;
private Criteria criteria;
View popView;
private Handler mHandler;
private Location location;
private MapController mapController;
private LocationManager locationManager;
int i;
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
this .setContentView(R.layout.tv);
tv1 = (TextView) this .findViewById(R.id.tv1);
openGPSSettings(); // 判断是否开启GPS
mHandler = new MyHandler();
mHandler.post(runnable);
getLocation();
setMapView();
}
/**
* 判断是否开启GPS
*/
private void openGPSSettings() {
LocationManager alm = (LocationManager) this .getSystemService(Context.LOCATION_SERVICE);
if (alm.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {
Toast.makeText( this , " GPS模块正常 " , Toast.LENGTH_SHORT).show();
return ;
}
Toast.makeText( this , " 请开启GPS！ " , Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);
startActivityForResult(intent, 0 ); // 此为设置完成后返回到获取界面
}
/**
* 设置地图显示
*/
private void setMapView(){
this .mapView = (MapView) this .findViewById(R.id.map);
this .mapView.setBuiltInZoomControls( true ); // 可以多点触摸放大
mapView.setStreetView( true );
mapView.setBuiltInZoomControls( true );
this .mapController = mapView.getController();
mapController.setZoom( 14 );
Drawable drawable = this .getResources().getDrawable(R.drawable.marker);
// 设置图片的绘制区域大小
drawable.setBounds( 0 , 0 , drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
this .mapController.animateTo(gp); // 通过动画方式移动到指定坐标
setView(); // 设置弹出框
MyOverlay myOverlay = new MyOverlay(drawable, this );
myOverlay.addOverlay( new OverlayItem(gp, " hello " , " i'm in Athens,Greece! " ));
mapView.getOverlays().add(myOverlay);
}
/**
* 设置地图标记弹出框样式
*/
private void setView(){
// popView不为null,即界面刷新重新调用setMapView的时候不用重新创建popView,否则原来popView的监听事件不启作用
if (popView == null ){
popView = super .getLayoutInflater().inflate(R.layout.pop, null );
mapView.addView(popView,
new MapView.LayoutParams(MapView.LayoutParams.WRAP_CONTENT, MapView.LayoutParams.WRAP_CONTENT,
null , MapView.LayoutParams.BOTTOM_CENTER));
popView.setVisibility(View.GONE);
}
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false ;
}
/**
* 获取位置信息
*/
private void getLocation(){
// 获取位置管理服务
String serviceName = Context.LOCATION_SERVICE;
locationManager = (LocationManager) this .getSystemService(serviceName);
// 查找到服务信息
criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE); // 高精度
criteria.setAltitudeRequired( false ); // 不要求海拔信息
criteria.setBearingRequired( false ); // 不要求方位信息
criteria.setCostAllowed( true ); // 是否允许付费
criteria.setPowerRequirement(Criteria.POWER_LOW); // 低功耗
String provider = locationManager.getBestProvider(criteria, true ); // 获取GPS信息
location = locationManager.getLastKnownLocation(provider); // 通过GPS获取位置
updateToNewLocation(location);
// 设置监听器，自动更新的最小时间为间隔N秒(1秒为1*1000，这样写主要为了方便)或最小位移变化超过N米
locationListener = new LocationListener(){
@Override
public void onLocationChanged(Location location) {
updateToNewLocation(location);
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
// TODO Auto-generated method stub
}
};
locationManager.requestLocationUpdates(provider, 100 * 1000 , 500 ,locationListener);
}
/**
* 获取GeoPoint
*/
private void updateToNewLocation(Location location) {
if ( true ){
double latitude = 31.16520805 * 1E6;
double longitude = 121.4000644 * 1E6;
// if (location != null) {
// double latitude = location.getLatitude()*1E6;
// double longitude = location.getLongitude()*1E6;
gp = new GeoPoint(( int ) latitude, ( int ) longitude);
tv1.setText( " 维度： " + latitude + " \n经度 " + longitude);
} else {
tv1.setText( " 无法获取地理信息 " );
}
}
/**
* 发送位置信息到服务器
*/
Runnable runnable = new Runnable(){
@Override
public void run() {
String provider = locationManager.getBestProvider(criteria, true );
location = locationManager.getLastKnownLocation(provider);
// double lat = location.getLatitude()*1E6;
// double lon = location.getLongitude()*1E6;
double lat = 31.16520805 * 1E6;
double lon = 121.4000644 * 1E6;
mHandler.postDelayed(runnable, 10 * 1000 );
Message message = mHandler.obtainMessage();
message.arg1 = ( int )lat;
message.arg2 = ( int )lon;
mHandler.sendMessage(message);
}
};
/** 定义MyHandler */
/**
* 自定义Handler
*/
class MyHandler extends Handler{
public void handleMessage(Message msg) {
i ++ ;
super .handleMessage(msg);
int lat = msg.arg1;
int lon = msg.arg2;
gp = new GeoPoint(( int ) lat, ( int ) lon);
mapController.setCenter(gp);
setMapView();
mapView.invalidate();
tv1.setText(i + " : " + " 维度： " + lat + " \n经度 " + lon);
// tv1.invalidate();
};
}
}
地图覆盖物MyOverlay类:
public class MyOverlay extends ItemizedOverlay{
private ArrayList < OverlayItem > mapOverlays = new ArrayList < OverlayItem > ();
private MapViewActivity context;
private TextView textView1,textView2;
public MyOverlay(Drawable arg0) {
super (arg0);
// TODO Auto-generated constructor stub
}
public MyOverlay(Drawable defaultMarker, Context context) {
this (defaultMarker);
this .context = (MapViewActivity)context;
}
@Override
protected OverlayItem createItem( int arg0) {
// TODO Auto-generated method stub
return mapOverlays.get(arg0);
}
@Override
public int size() {
// TODO Auto-generated method stub
return mapOverlays.size();
}
protected boolean onTap( int index) {
MapView.LayoutParams geoLP = (MapView.LayoutParams)context.popView.getLayoutParams();
geoLP.point = mapOverlays.get(index).getPoint();
context.mapView.updateViewLayout(context.popView, geoLP);
context.popView.setVisibility(View.VISIBLE);
textView1 = (TextView) context.popView.findViewById(R.id.map_bubbleTitle);
textView2 = (TextView) context.popView.findViewById(R.id.map_bubbleText);
textView1.setText(mapOverlays.get(index).getTitle());
textView2.setText(mapOverlays.get(index).getSnippet());
context.popView.setVisibility(View.VISIBLE);
ImageView imageView = (ImageView) context.popView.findViewById(R.id.map_bubbleImage);
imageView.setOnClickListener( new View.OnClickListener(){
@Override
public void onClick(View v) {
context.popView.setVisibility(View.GONE);
}
});
return true ;
}
public void addOverlay(OverlayItem overlay) {
mapOverlays.add(overlay);
populate();
}
}
用到的图片:
layout文件:
tv.xml 用来显示地图
<? 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/tv1"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
/>
< com.google.android.maps.MapView
android:id ="@+id/map"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:enabled ="true"
android:clickable ="true"
android:apiKey ="04lsJg9XJO11W63yc6Q3vsfb0HTJgiYxtTlCiGg"
/>
</ LinearLayout >
pop.xml 用来显示地图覆盖物的弹出框
< RelativeLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:background ="@drawable/bubble_background"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:paddingLeft ="5px"
android:paddingTop ="5px"
android:paddingRight ="5px"
android:paddingBottom ="20px"
>
< TextView android:id ="@+id/map_bubbleTitle"
android:ellipsize ="marquee"
android:layout_width ="120px"
android:layout_height ="wrap_content"
android:gravity ="center_horizontal"
android:singleLine ="true" />
< ImageView android:id ="@+id/map_bubbleImage"
android:background ="@drawable/close"
android:layout_width ="30px"
android:layout_toRightOf ="@id/map_bubbleTitle"
android:layout_height ="wrap_content" />
< TextView android:id ="@+id/map_bubbleText"
android:layout_width ="150px"
android:layout_below ="@id/map_bubbleTitle"
android:layout_height ="wrap_content"
android:singleLine ="false" />
</ RelativeLayout >
OK。 搞定
文章来自：http://www.cnblogs.com/yyyyy5101/archive/2011/05/27/2060172.html