在android中使用gps无法获取位置
我正在尝试使用gps服务获取位置的示例代码。bt不获取位置。 下面是我的代码-在android中使用gps无法获取位置,android,gps,Android,Gps,我正在尝试使用gps服务获取位置的示例代码。bt不获取位置。 下面是我的代码- public class MainActivity extends Activity implements LocationListener{ Location mLocation; LocationManager mManager; LocationListener mlistener; Geocoder mcoder; Context context; Te
public class MainActivity extends Activity implements LocationListener{
Location mLocation;
LocationManager mManager;
LocationListener mlistener;
Geocoder mcoder;
Context context;
TextView txtLat;
String lat;
String provider;
protected String latitude,longitude;
protected boolean gps_enabled,network_enabled;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
mManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
txtLat = (TextView) findViewById(R.id.tv);
}
public void getMyLocation(){
String addressString = "";
final Geocoder gc = new Geocoder(this, Locale.getDefault());
try
{
final List<Address> addresses = gc.getFromLocation(18.5203, 73.8567, 4);
final StringBuilder sb = new StringBuilder();
System.out.println("location..."+sb);
if ( addresses.size() > 0 )
{
final Address address = addresses.get(0);
for ( int i = 0; i < address.getMaxAddressLineIndex(); i++ )
{
sb.append(address.getAddressLine(i)).append("\n");
}
sb.append(address.getLocality()).append("\n");
sb.append(address.getPostalCode()).append("\n");
sb.append(address.getCountryName());
}
addressString = sb.toString();
}
catch ( final IOException e )
{
}
txtLat.setText("Your Current Position is:\n" +
"\n" + addressString);
}
@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);
return true;
}
@Override
public void onLocationChanged(Location location) {
getMyLocation();
}
@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
}
}
public类MainActivity扩展活动实现LocationListener{
位置;
地点经理;
位置监听器;
地理编码器;
语境;
TextView-txtLat;
弦拉特;
字符串提供者;
保护字符串纬度、经度;
受保护布尔值gps_启用,网络_启用;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mManager=(LocationManager)getSystemService(Context.LOCATION\u服务);
mManager.RequestLocationUpdate(LocationManager.GPS_提供程序,0,0,此);
txtLat=(TextView)findViewById(R.id.tv);
}
public void getMyLocation(){
字符串地址字符串=”;
final Geocoder gc=新的Geocoder(这个,Locale.getDefault());
尝试
{
最终列表地址=gc.getFromLocation(18.5203,73.8567,4);
最终StringBuilder sb=新StringBuilder();
系统输出打印项次(“位置…”+sb);
如果(地址.size()>0)
{
最终地址=地址。获取(0);
对于(int i=0;i
尝试以这种方式实施gps
gps = new GPSTracker(MainActivity .this);
// check if GPS enabled
if(gps.canGetLocation()){
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
现在创建GPSTracker.java类
public class GPSTracker extends Service implements LocationListener {
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public GPSTracker(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
// First get location from Network Provider
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS(){
if(locationManager != null){
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}
更新:
如果您必须使用纬度
和经度
要求位置名称,则
Geocoder gcd = new Geocoder(context, Locale.getDefault());
List<Address> addresses = gcd.getFromLocation(lat, lng, 1);
if (addresses.size() > 0)
System.out.println(addresses.get(0).getLocality());
Geocoder gcd=new Geocoder(context,Locale.getDefault());
列表地址=gcd.getFromLocation(lat,lng,1);
如果(地址.size()>0)
System.out.println(addresses.get(0.getLocality());
在这段代码中,我刚刚添加了您所在位置的toast消息,现在您可以根据需要使用
如果您需要任何帮助,请发表评论
快乐编码。您的代码只需要一些小改动
- 您必须实现侦听器的所有方法,以了解提供程序是否可用,设备中是否内置了任何提供程序,以及您是否仍然可以期望位置更新
- 在
中,使用硬编码的纬度和经度调用getMyLocation()
。这是为了调试吗Geocoder.getFromLocation()
- 然后是一个新创建的空StringBuilder的
。如果您想打印出一些内容,最好使用System.println()
Log.d()
- 最后,如果其他一切正常,但在文本视图中仍然没有地址,那么尝试
地址。它出错的可能性较小,但当信息在一秒钟后消失时,你需要盯着屏幕Toast
我的猜测是,你的模拟器没有配置GPS,或者你没有得到更新——要么是因为没有卫星,要么是因为你没有等待足够长的时间进行卫星连接。输出是什么?例如,TextView上有什么?只是显示您当前的位置是:考虑在
getMyLocation()
中的“if”条件中添加一个日志。这样可以确保调用方法并检索地址。还要检查addresses.size()
是否为零。我需要位置。我正在获取经纬度。使用经纬度我想要好的地名。获取此警告。我正在使用emulator。09-10 10:23:39.196:W/System.err(1494):java.io.IOException:服务不可用09-10 10:23:39.196:W/System.err(1494):在android.location.Geocoder.getFromLocation(Geocoder.java:117)@yuva你能检查一下设备吗?