无法通过 Intent 将值从 Child Activity（Google 地图）传递到 Parent activity

Question

我只想从 Google 地图 (children activity) 中检索纬度和经度值，使用 onActivityResult 将其传递回 parent activity。然而，检索到的值似乎总是 return 0。如有任何帮助，我们将不胜感激！

Parent Activity:

 Intent intent;
 intent = new Intent(TheInput.this, GoogleMap.class);
 startActivityForResult(intent, 5);
 break;
 ...
@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == 5){
            if(resultCode == RESULT_OK) {
                latitude = getIntent().getDoubleExtra("LATITUDE",0);
                longitude = getIntent().getDoubleExtra("LONGITUDE",0);
                Toast.makeText(getApplicationContext(), "From the received data, \nLat is " + latitude + ", Lon is " + longitude, Toast.LENGTH_SHORT).show(); 
                 //The toast value shows 0
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

Child Activity（Google 地图）：

List<Address> locationList = null;
Address address = locationList.get(0);
LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
lat = address.getLatitude();
lon = address.getLongitude();

Intent intent = new Intent();
intent.putExtra("LATITUDE",lat);
intent.putExtra("LONGITUDE",lon);
setResult(RESULT_OK, intent);

Toast.makeText(getApplicationContext(), "Lat is " + lat + ", Lon is " + lon, Toast.LENGTH_SHORT).show();
//The toast shows that they are values here

Answer 1

找出我的错误，这部分代码在 Parent Activity

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == 5){
            if(resultCode == RESULT_OK) {
                latitude = getIntent().getDoubleExtra("LATITUDE",0);
                longitude = getIntent().getDoubleExtra("LONGITUDE",0);
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

应该这样写。

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == 5){
            if(resultCode == RESULT_OK) {
                latitude = data.getDoubleExtra("LATITUDE",0);
                longitude = data.getDoubleExtra("LONGITUDE",0);
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

无法通过 Intent 将值从 Child Activity（Google 地图）传递到 Parent activity

Unable to pass value through Intent from Child Activity (Google Maps) to Parent activity

android

android-intent