Question

我正在关注this教程以使用地方选择器。这里没有提到放置onActivityResult()方法的位置。所以我尝试使用代码来获取所选位置的详细信息。但无法得到任何回应。

我的主要活动名为MapActivity：

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

private GoogleMap mMap;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}


/**
 * Manipulates the map once available.
 * This callback is triggered when the map is ready to be used.
 * This is where we can add markers or lines, add listeners or move the camera. In this case,
 * we just add a marker near Sydney, Australia.
 * If Google Play services is not installed on the device, the user will be prompted to install
 * it inside the SupportMapFragment. This method will only be triggered once the user has
 * installed Google Play services and returned to the app.
 */

int PLACE_PICKER_REQUEST = 1;
@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    // Add a marker in Sydney and move the camera
    LatLng sydney = new LatLng(-34, 151);
    mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
    mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));



    PlacePicker.IntentBuilder builder = new PlacePicker.IntentBuilder();
    try {
        startActivityForResult(builder.build(this), PLACE_PICKER_REQUEST);
    }
    catch (Exception e){

    }
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == PLACE_PICKER_REQUEST) {
        if (resultCode == RESULT_OK) {
            Place place = PlacePicker.getPlace(this, data);
            String toastMsg = String.format("Place: %s", place.getName());
            Toast.makeText(this, toastMsg, Toast.LENGTH_LONG).show();
        }
    }
}

}

我也不知道应该放置PlacePicker.IntentBuilder builder = new PlacePicker.IntentBuilder();的位置。

我已经花了很多时间来搜索这个，但我无法得到完美的解决方案。任何帮助将不胜感激。

提前致谢！

Answer 1

你不应该在Map活动中调用此代码startActivityForResult(builder.build(this), PLACE_PICKER_REQUEST);，它应该从非地图活动中调用，可能是在点击按钮后（由你决定）。

一些伪代码示例：

public class MyActivity extends AppCompatActivity {

private Button mButton;

  @Override
  onCreate(Bundle savedInstanceState) {

  mButton.setOnCLickListener(...);
}

private void onButtonClicked() {
// this opens a new activity with a place picker
   PlacePicker.IntentBuilder builder = new PlacePicker.IntentBuilder();
   startActivityForResult(builder.build(this),PLACE_PICKER_REQUEST);

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     // when you click back from place picker, it is handled in this method
    if (requestCode == PLACE_PICKER_REQUEST) {
        if (resultCode == RESULT_OK) {
            Place place = PlacePicker.getPlace(this, data);
            String toastMsg = String.format("Place: %s", place.getName());
            Toast.makeText(this, toastMsg, Toast.LENGTH_LONG).show();
        }
    }

}

无法使用地方选择器获取选定的地点信息

1 个答案: