这是我获取经度和纬度的源代码，但是我如何在Location Listener中实现语句，我是新手，我真的需要帮助，请提供帮助，谢谢。
public class Location extends AppCompatActivity{
LocationManager locationManager=(LocationManager)getSystemService(LOCATION_SERVICE);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_location);
isLocationEnabled();
}
LocationListener locationListenerGPS=new LocationListener() {
@Override
public void onLocationChanged(android.location.Location location) {
double latitude=location.getLatitude();
double longitude=location.getLongitude();
String msg="New Latitude: "+latitude + "New Longitude: "+longitude;
Toast.makeText(getBaseContext(),msg,Toast.LENGTH_LONG).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
};
protected void onResume(){
super.onResume();
isLocationEnabled();
}
private void isLocationEnabled() {
if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
AlertDialog.Builder alertDialog=new AlertDialog.Builder(this);
alertDialog.setTitle("Enable Location");
alertDialog.setMessage("Your locations setting is not enabled. Please enabled it in settings menu.");
alertDialog.setPositiveButton("Location Settings", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
Intent intent=new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
});
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
dialog.cancel();
}
});
AlertDialog alert=alertDialog.create();
alert.show();
}
else{
AlertDialog.Builder alertDialog=new AlertDialog.Builder(this);
alertDialog.setTitle("Confirm Location");
alertDialog.setMessage("Your Location is enabled, please enjoy");
alertDialog.setNegativeButton("Back to interface",new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
dialog.cancel();
}
});
AlertDialog alert=alertDialog.create();
alert.show();
}
}
}
最佳答案
只需使用这段代码:
public class Location extends AppCompatActivity {
LocationManager locationManager;
Context mContext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_location);
mContext=this;
locationManager=(LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER,
2000,
10, locationListenerGPS);
isLocationEnabled();
}
LocationListener locationListenerGPS=new LocationListener() {
@Override
public void onLocationChanged(android.location.Location location) {
double latitude=location.getLatitude();
double longitude=location.getLongitude();
String msg="New Latitude: "+latitude + "New Longitude: "+longitude;
Toast.makeText(mContext,msg,Toast.LENGTH_LONG).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
};
protected void onResume(){
super.onResume();
isLocationEnabled();
}
private void isLocationEnabled() {
if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
AlertDialog.Builder alertDialog=new AlertDialog.Builder(mContext);
alertDialog.setTitle("Enable Location");
alertDialog.setMessage("Your locations setting is not enabled. Please enabled it in settings menu.");
alertDialog.setPositiveButton("Location Settings", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
Intent intent=new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
});
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
dialog.cancel();
}
});
AlertDialog alert=alertDialog.create();
alert.show();
}
else{
AlertDialog.Builder alertDialog=new AlertDialog.Builder(mContext);
alertDialog.setTitle("Confirm Location");
alertDialog.setMessage("Your Location is enabled, please enjoy");
alertDialog.setNegativeButton("Back to interface",new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
dialog.cancel();
}
});
AlertDialog alert=alertDialog.create();
alert.show();
}
}
}
requestLocationUpdates方法参数如下:
provider:The name of the provider with which we would like to register.
minTime:Minimum time interval between location updates (in milliseconds).
minDistance:Minimum distance between location updates (in meters).
listener:A LocationListener whose onLocationChanged(Location) method will be called for each location update.
权限:
<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" />
为低于 lollipop 的版本和 marshmallow 及更高版本使用运行时权限，将上述权限添加到 list 文件。
关于android - 如何实现 LocationListener？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42218419/