2
所以我想創建一個迭代海槽火力結構看這樣的功能:如何迭代Google Android中的Firebase結構?
{
"users" : {
"7e122736-2dd4-4770-a360-a0e7cbe41a43" : {
"currentLatitude" : 46.6598714,
"currentLongitude" : 23.5637339,
"displayName" : "gjsj2",
"email" : "[email protected]",
"password" : "123"
},
"a09e7e1d-ad3a-4d21-b0ba-069e0999bb93" : {
"currentLatitude" : 47.6599014,
"currentLongitude" : 23.5636797,
"displayName" : "gjsj",
"email" : "[email protected]",
"password" : "123"
},
"abc29286-fd6d-4088-95da-759828b5835d" : {
"currentLatitude" : 50.6599043,
"currentLongitude" : 23525.5637188,
"displayName" : "gjsj3",
"email" : "[email protected]",
"password" : "123"
}
}
}
我想創建一個函數,每個獨特的用戶ID的孩子,用他的座標以創建一個標記上一個谷歌地圖地圖。這是我走到這一步,但它不似乎工作:
public void onChildChanged(DataSnapshot snapshot, String s) {
for (DataSnapshot userSnapshot : snapshot.getChildren()) {
for (DataSnapshot uniqueUserSnapshot : userSnapshot.getChildren()) {
Users currentUser = uniqueUserSnapshot.getValue(Users.class);
MarkerOptions options = new MarkerOptions()
.title(currentUser.getEmail())
.icon(BitmapDescriptorFactory.defaultMarker(getRandomNumberInRange(0, 360)))
.position(new LatLng(currentUser.getCurrentLatitude(), currentUser.getCurrentLongitude()));
mMap.addMarker(options);
Toast.makeText(MainActivity.this, "fsafasfasfas", Toast.LENGTH_SHORT).show();
}
}
}
這是我的用戶POJO:
package com.licenta.vladut.mmap;
public class Users {
String email;
String displayName;
String password;
double currentLatitude;
double currentLongitude;
public Users() {
}
public Users(String email, String displayName, String password, double currentLongitude, double currentLatitude) {
this.email = email;
this.displayName = displayName;
this.password = password;
this.currentLongitude = currentLongitude;
this.currentLatitude = currentLatitude;
}
public Users(String email, String displayName, String password) {
this.email = email;
this.displayName = displayName;
this.password = password;
}
public String getDisplayName() {
return displayName;
}
public String getEmail() {
return email;
}
public String getPassword() {
return password;
}
public double getCurrentLongitude() {
return currentLongitude;
}
public double getCurrentLatitude() {
return currentLatitude;
}
}
很想得到你的想法。謝謝。
「但它似乎沒有工作」 - 你是這個意思嗎? –
那麼它不會爲每個用戶創建一個標記。 –
這可能是一個不同的問題。嘗試在每次迭代時調試'options'對象,並確保問題出現在迭代中,而不是別的。 –