[英]Get longitude and latitude using android Geofire
我正在嘗試使用 Geo fire for android 獲取用戶位置。 我試圖獲取用戶的經度和緯度並將其保存在 firebase 數據庫中,但我沒有運氣。
下面是我的代碼。 有人能告訴我我做錯了什么嗎?
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_after_registration);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
overridePendingTransition(R.anim.slide_in, R.anim.slide_out);
savebutton=findViewById(R.id.save);
String uid = FirebaseAuth.getInstance().getCurrentUser().getUid();
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference update = rootRef.child("Users").child(uid);
GeoFire geoFire=new GeoFire(rootRef);
geoFire.getLocation("location", new LocationCallback() {
@Override
public void onLocationResult(String key, GeoLocation location) {
if(location!=null){
Double longi = location.longitude;
Double lat = location.latitude;
update.child("longitude").setValue(longi);
update.child("latitude").setValue(lat);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
在 GeoFire 中,您可以通過字符串鍵設置和查詢位置。 要為鍵設置位置,只需調用 setLocation 方法:
geoFire.setLocation("location", new GeoLocation(37.7853889, -122.4056973), new GeoFire.CompletionListener() {
@Override
public void onComplete(String key, FirebaseError error) {
if (error != null) {
System.err.println("There was an error saving the location to GeoFire: " + error);
} else {
System.out.println("Location saved on server successfully!");
}
}
});
設置位置后,您可以檢索它並將值保存到數據庫:
geoFire.getLocation("location", new LocationCallback() {
@Override
public void onLocationResult(String key, GeoLocation location) {
if (location != null) {
System.out.println(String.format("The location for key %s is [%f,%f]", key, location.latitude, location.longitude))
// save longitude and latitude to db
Double longi = location.longitude;
Double lat = location.latitude
} else {
System.out.println(String.format("There is no location for key %s in GeoFire", key));
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
System.err.println("There was an error getting the GeoFire location: " + databaseError);
}
});
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