请任何人帮助我。我希望该应用程序在2个文本视图中显示我的位置，但不显示位置。 而且我想知道如何在数据库中添加位置并在需要时获取它。
感谢大家对我有帮助：）
public class Main2 extends AppCompatActivity implements LocationListener {
private LocationManager locationManager;
private Location location;
private TextView txt1;
private TextView txt2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
txt1 = findViewById(R.id.tv_latitude);
txt2 = findViewById(R.id.tv_longitude);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
location = locationManager.getLastKnownLocation(locationManager.NETWORK_PROVIDER);
onLocationChanged(location);
}
@Override
public void onLocationChanged(Location location) {
double longi = location.getLongitude();
double lati = location.getLatitude();
txt1.setText("lati:" + lati);
txt2.setText("longi" + longi);
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
}
清单
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
2个TextViews
<TextView
android:id="@+id/tv_longitude"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="30dp"
android:background="@android:color/white"
android:padding="10dp"
android:text="long"
android:textSize="30sp"
android:layout_gravity="center"
/>
<TextView
android:id="@+id/tv_latitude"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="30dp"
android:background="@android:color/white"
android:padding="10dp"
android:text="lat"
android:textSize="30sp"
android:layout_gravity="center"
/>