我是Android新手，我遇到了问题。
基本上我想要的是当我移动时，我的应用程序获得GPS信息并显示在我的手机上，包括我以米为单位的距离。但我不知道如何在Android中这样做。
这是我的代码。
public class MainActivity extends AppCompatActivity {
TextView tv;
TextView tv2;
ToggleButton tb;
Button currentGPS;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Location location11 = null;
double Longitude1 = 0;//location11.getLongitude();
double Latitude1 = 0;//location11.getLatitude();
tv = (TextView) findViewById(R.id.textView2);
tv.setText("Ready");
tb = (ToggleButton)findViewById(R.id.toggle1);
final LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
tb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try{
if(tb.isChecked()){
tv.setText("connecting..");
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER,
100,
1,
mLocationListener);
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
100,
1,
mLocationListener);
}else{
tv.setText("Information not connecting");
lm.removeUpdates(mLocationListener);
}
}catch(SecurityException ex){
}
}
});
}
private final LocationListener mLocationListener = new LocationListener() {
public void onLocationChanged(Location location1) {
Log.d("test", "onLocationChanged, location:" + location1);
double longitude = location1.getLongitude();
double latitude = location1.getLatitude();
double altitude = location1.getAltitude();
float accuracy = location1.getAccuracy();
String provider = location1.getProvider();
final double latitudeA = location1.getLatitude();
final double longitudeA = location1.getLongitude();
double distance;
Location locationA = new Location("point A");
locationA.setLatitude(latitudeA);
locationA.setLongitude(longitudeA);
Location locationB = new Location("point B");
locationB.setLatitude(latitude);
locationB.setLongitude(longitude);
distance = locationA.distanceTo(locationB);
float currentSpeed = (location1.getSpeed()*3600/1000);
String convertedSpeed = String.format("%.2f",currentSpeed);
tv.setText("Provider : " + provider + "\n\nlatitude : " + longitude + "\n\nlangitude : " + latitude
+ "\n\naltitude : " + altitude + "\n\naccuracy : " + accuracy +"/\n\nMoving distance : " + distance + "/m"
+ "\n\nCurrent speed : " + convertedSpeed + "Km/h");
}
public void onProviderDisabled(String provider) {
Log.d("test", "onProviderDisabled, provider:" + provider);
}
public void onProviderEnabled(String provider) {
Log.d("test", "onProviderEnabled, provider:" + provider);
}
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.d("test", "onStatusChanged, provider:" + provider + ", status:" + status + " ,Bundle:" + extras);
}
};
}