Question

我想在找不到地图中的位置时显示对话框。但如果找不到找到的位置，总是强行关闭..我的代码有问题吗？请非常感谢你最诚挚的问候

public void onSearch(View view) {
    String location = edit.getText().toString();

    List<Address> addressList = null;


    if(!location.equals("")) {

        Geocoder geocoder = new Geocoder(this);
        try {
            addressList = geocoder.getFromLocationName(location, 1);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Address address = addressList.get(0);
        LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
        mMap.addMarker(new MarkerOptions().position(latLng).title("Posisi"));
        mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
        mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));
        if(address!=null){
            Toast.makeText(getApplicationContext(),"Location Found", Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(getApplicationContext(),"Location Not Found", Toast.LENGTH_LONG).show();

        }

        }else if(location.equals("")){
        Toast.makeText(getApplicationContext(), "Nothing Found",Toast.LENGTH_LONG).show();
        }else {
        Toast.makeText(getApplicationContext(), "location null",Toast.LENGTH_LONG).show();
    }

}

Answer 1

检查addressList是否为null或size是0.然后，显示一个对话框。

public void onSearch(View view) {
    String location = edit.getText().toString();
    List<Address> addressList = null;
    if(!location.equals("")) {
        Geocoder geocoder = new Geocoder(this);
        try {
            addressList = geocoder.getFromLocationName(location, 1);
        } catch (IOException e) {
            e.printStackTrace();
        }
        if((addressList == null) || (addressList != null && addressList.size == 0)){
            //Show a dialog here;
            return;
        }
        Address address = addressList.get(0);
        LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
        mMap.addMarker(new MarkerOptions().position(latLng).title("Posisi"));
        mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
        mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));
        if(address!=null){
            Toast.makeText(getApplicationContext(),"Location Found", Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(getApplicationContext(),"Location Not Found", Toast.LENGTH_LONG).show();    
        }
   }else if(location.equals("")){
        Toast.makeText(getApplicationContext(), "Nothing Found",Toast.LENGTH_LONG).show();
   }else {
        Toast.makeText(getApplicationContext(), "location null",Toast.LENGTH_LONG).show();
   }    
}

在找不到地图中的位置时显示对话框

1 个答案: