AndroidLocation.doc

->activity_main.xml
 <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:padding="40dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TextView
            android:id="@+id/textView3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="30dp"
            android:text="HIKER'S WATCH"
            android:textColor="@android:color/white"
            android:textSize="30dp"
            android:textStyle="bold" />


        <TextView
            android:id="@+id/lattitude"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="Lattitude : "
            android:textColor="@android:color/white"
            android:textSize="25dp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/longitude"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="Longitude : "
            android:textColor="@android:color/white"
            android:textSize="25dp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/altitude"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="Altitude : "
            android:textColor="@android:color/white"
            android:textSize="25dp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/accuracy"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="Accuracy : "
            android:textColor="@android:color/white"
            android:textSize="25dp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/address"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="Address : "
            android:textColor="@android:color/white"
            android:textSize="25dp"
            android:textStyle="bold" />
    </LinearLayout>
    
    
    
    ->in Manifest.xml
        <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    
    ->in MainActivity.java
    public class MainActivity extends AppCompatActivity {
    public static final int LOCATION_REQUEST_CODE = 101;
    public static final int REQUEST_CHECK_SETTINGS = 0;
    TextView lat,lon,alt,acu,add;
    LocationManager manager;
    LocationListener listener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lat=findViewById(R.id.lattitude);
        lon=findViewById(R.id.longitude);
        alt=findViewById(R.id.altitude);
        acu=findViewById(R.id.accuracy);
        add=findViewById(R.id.address);

        LocationRequest locationRequest = LocationRequest.create();
        locationRequest.setInterval(10000);
        locationRequest.setFastestInterval(5000);
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);


        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                .addLocationRequest(locationRequest);


        SettingsClient client = LocationServices.getSettingsClient(this);
        Task<LocationSettingsResponse> task = client.checkLocationSettings(builder.build());

        task.addOnSuccessListener(this, new OnSuccessListener<LocationSettingsResponse>() {
            @Override
            public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
                // All location settings are satisfied. The client can initialize
                // location requests here.
                // ...

                Log.i("clash", "onSuccess: ");
                lat.setText( "Latitude : please wait..");
                lon.setText( "Longitude : please wait..");
                alt.setText( "Altitude : please wait..");
                acu.setText( "Accuracy : please wait..");
                add.setText("Address : please wait..");
            }
        });

        task.addOnFailureListener(this, new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                if (e instanceof ResolvableApiException) {
                    // Location settings are not satisfied, but this can be fixed
                    // by showing the user a dialog.
                    try {
                        // Show the dialog by calling startResolutionForResult(),
                        // and check the result in onActivityResult().
                        ResolvableApiException resolvable = (ResolvableApiException) e;
                        resolvable.startResolutionForResult(MainActivity.this, REQUEST_CHECK_SETTINGS);
                    } catch (IntentSender.SendIntentException sendEx) {
                        // Ignore the error.
                    }
                    Log.i("clash", "onFailure: ");
                    lat.setText( "Latitude : turn on gps");
                    lon.setText( "Longitude : turn on gps");
                    alt.setText( "Altitude : turn on gps");
                    acu.setText( "Accuracy : turn on gps");
                    add.setText("Address : turn on gps");
                }
            }
        });


        manager= (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
        listener=new LocationListener() {
            @Override
            public void onLocationChanged(@NonNull Location location) {
                //Log.i("clash", "onLocationChanged: "+location);
                lat.setText( "Latitude : "+ location.getLatitude());
                lon.setText( "Longitude : "+ location.getLongitude());
                alt.setText( "Altitude : "+ location.getAltitude());
                acu.setText( "Accuracy : "+ location.getAccuracy());
                Geocoder geocoder=new Geocoder(MainActivity.this, Locale.getDefault());
                List<Address> addressList=null;
                String address=null;
                try {
                    addressList=geocoder.getFromLocation(location.getLatitude(),location.getLongitude(),1);
                    if (addressList.size()>0 && addressList!=null){
                        if (addressList.get(0).getAddressLine(0)!=null){
                            address=addressList.get(0).getAddressLine(0);
                        }
                        else{
                            address=addressList.get(0).toString();
                        }
                    }
                    else{
                        address="Unable to get Location";
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
                add.setText("Address : "+address);

            }

            @Override
            public void onProviderEnabled(@NonNull String provider) { }

            @Override
            public void onProviderDisabled(@NonNull String provider) { }

            @Override
            public void onStatusChanged(String provider, int status, Bundle extras) { }
        };

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_REQUEST_CODE);
        }
        else{
            manager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,listener);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode==REQUEST_CHECK_SETTINGS){
            if (resultCode==RESULT_OK){
                lat.setText( "Latitude : please wait..");
                lon.setText( "Longitude : please wait..");
                alt.setText( "Altitude : please wait..");
                acu.setText( "Accuracy : please wait..");
                add.setText("Address : please wait..");
            }
            else{
                lat.setText( "Latitude : turn on gps");
                lon.setText( "Longitude : turn on gps");
                alt.setText( "Altitude : turn on gps");
                acu.setText( "Accuracy : turn on gps");
                add.setText("Address : turn on gps");
            }
        }
    }
}