how to handle the fragment state when dialog dismissed

Question

I have a ListView in a Dialog . When I select an item from the the list I dismiss the Dialog . Now the previous Fragment appears. I need to get the selected value from the Dialog .

addressListView.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
        addr = (Address) addressListView.getItemAtPosition(position);
        AppUtils.printLog("selected",addr.getLatitude()+","+addr.getLongitude());
        dismiss();
    }
});

Answer 1

You need to add a listener to your Dialog . For example add something like this to you Dialog class:

private AddressListener addressListener;
public interface AddressListener {
    public void onSelected(Address address);
}

public AddressListener getAddressListener() {
    return addressListener;
}

public void setAddressListener(AddressListener addressListener) {
    this.addressListener = addressListener;
}

I recommend you also write a helper method to notify the listener:

protected void notifyAddressListener(Address address) {
    if(this.addressListener != null) {
        this.addressListener.onSelected(address);
    }
}

You then just have to call notifyAddressListener(...) in the OnItemClickListener to pass a value back to the listener:

addressListView.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
        addr = (Address) addressListView.getItemAtPosition(position);
        AppUtils.printLog("selected",addr.getLatitude()+","+addr.getLongitude());

        // Notify listener
        notifyAddressListener(addr);

        dismiss();
    }
});

In your Fragment or Activity or wherever you create and show the Dialog you have to set the AddressListener like this:

ExampleDialog dialog = new ExampleDialog();
dialog.setAddressListener(this);
dialog.show();

Of course you then have to implement the onSelected() method in your Fragment or Activity and as soon as the user picks an item in the Dialog onSelected() will be called.