Question

我正在Android Studio中制作一个应用程序，用户可以在其中将当前的经纬度保存在Firebase中。我正在使用此代码：

public class SaveLocationActivity extends AppCompatActivity implements LocationListener {

TextView saveLatitude, saveLongitude;
Button saveLocationBtn;
FirebaseDatabase firebaseDatabase;
DatabaseReference databaseReference;
LocationManager locationManager;
Double latitude,longitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_save_location);

    firebaseDatabase = FirebaseDatabase.getInstance();
    databaseReference = firebaseDatabase.getReference().child("User");

    saveLatitude = findViewById(R.id.saveLatitude);
    saveLongitude = findViewById(R.id.saveLongitude);
    saveLocationBtn = findViewById(R.id.saveLocationBtn);

    if (ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

        ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION, android.Manifest.permission.ACCESS_COARSE_LOCATION}, 101);

    }

    saveLocationBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getLocation();
        }
    });

}

public void getLocation() {
    try {
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 5, SaveLocationActivity.this);
    }
    catch (SecurityException e)
    {
        e.printStackTrace();
    }
}
@Override
public void onLocationChanged(Location location)
{
    latitude=location.getLatitude();
    String latStr=latitude.toString();

    longitude=location.getLongitude();
    String longStr=longitude.toString();

    saveLatitude.setText(latStr);
    saveLongitude.setText(longStr);

    databaseReference.push().setValue("Latitude : "+latStr);
    databaseReference.push().setValue("Longitude : "+longStr);

    Toast.makeText(SaveLocationActivity.this, "Location Saved !!!", Toast.LENGTH_LONG).show();
    Intent i=new Intent(SaveLocationActivity.this,DisplayProfile.class);
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    startActivity(i);
    SaveLocationActivity.this.finish();
}

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

}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {
    Toast.makeText(SaveLocationActivity.this, "Please Enable GPS and Internet !!!", Toast.LENGTH_SHORT).show();

}
}

现在，每当我在手机上运行此应用程序时，它都会显示Toast消息“请启用GPS和Internet !!!”尽管我的手机上有“我的位置”，也有正常的互联网连接。我实际上是使用我的家庭wifi进行互联网连接。如果有人在我的代码中发现任何错误，请告知我，也请提出可能的解决方案。

Answer 1

您是否已将此权限添加到清单中？

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

当前的纬度和经度未显示

1 个答案: