将gps位置存储在火情基地实时数据库中

Question

我需要将我的位置存储到firebase实时数据库中。以下代码正在工作，并且仅在Android应用程序中显示位置。我如何将这个位置发送到firebase？

public class MainActivity extends AppCompatActivity {
Button button;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button);
textView = (TextView) findViewById(R.id.textView);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {              //check for sdk version
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M ) {
if (checkSelfPermission(android.Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED && checkSelfPermission(android.Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION}, 1000);
}else{
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = locationManager  .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
try{
String city = hereLocation(location.getLatitude(), location.getLongitude());
textView.setText(city);
}catch (Exception e)
{ e.printStackTrace();
Toast.makeText(MainActivity.this,"Not found!",Toast.LENGTH_LONG).show();
}
}
}
}
});

}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode){  //set the text value
case 1000:{
if(grantResults[0] == PackageManager.PERMISSION_GRANTED)
{
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
String city = hereLocation(location.getLatitude(),location.getLongitude());
textView.setText(city);
}else{
Toast.makeText(this,"permission is granted!",Toast.LENGTH_LONG).show();
}
break;
}
}
}
private String hereLocation(double lat, double lon){  //access geo location
String cityName = "";
Geocoder geocoder= new Geocoder(this ,Locale.getDefault());
List<Address> addresses;
try{
addresses = geocoder.getFromLocation(lat,lon, 10);
if(addresses.size()> 0){
for(Address adr:addresses) {
if (adr.getLocality() != null && adr.getLocality() .length()> 0) {
cityName = adr.getLocality();
break;
}
}
}
}catch (IOException e){
e.printStackTrace();
}
return cityName;
}
}

城市名称是使用文本视图存储的。它将给出所定位设备的当前城市。我需要将此位置发送到firebase实时数据库。

Answer 1

您可以使用Firebase Database和DatabaseReference类将位置发送到Firebase。首先，你必须确保你的构建中有这些SDK。gradle:

implementation 'com.google.firebase:firebase-storage:16.0.4'
implementation 'com.google.firebase:firebase-database:16.0.4'

此外，请确保您已在Firebase控制台中设置了实时数据库。最好选择"测试"选项，这样任何人都可以写入数据库。如果您以前从未使用过Firebase，请查看Firebase的此文档，在您的Android应用程序中设置Firebase。

一旦您在依赖项中添加了代码，请执行以下操作：

FirebaseDatabase firebaseDatabase = FirebaseDatabase.getInstance();
DatabaseReference databaseReference = firebaseDatabase.getReference("Locations"); 
//Instead of "Locations" you can say something else. Locations will be the name of your path where the location is stored.
//Create a Hashmap to store the information with a key and a value:
Hashmap<String, String> values = new Hashmap<>();
values.put("Location", city);
databaseReference.push().setValue(values);

您可以添加onSuccessListener或onFailureListener来查看它是否有效。如果这不起作用，请查看Firebase的这篇文档。