shared.dialog.fixedorderdialog.BaseDialogFragment.java Source code

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Here is the source code for shared.dialog.fixedorderdialog.BaseDialogFragment.java

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/*******************************************************************************
 * Copyright 2013 Steven Rudenko
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package shared.dialog.fixedorderdialog;

import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;

public class BaseDialogFragment<Listener> extends DialogFragment {

    private Listener listener;

    public Listener getListener() {
        return listener;
    }

    public boolean isShowing() {
        final Dialog dialog = getDialog();
        return dialog != null && dialog.isShowing();
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRetainInstance(true);
    }

    protected boolean isListenerOptional() {
        return true;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        try {
            listener = (Listener) activity;
        } catch (ClassCastException e) {
            if (!isListenerOptional())
                throw new ClassCastException(activity.getClass().getName() + " must implement listener interface.");
        }
    }

    // Hack for android issue 17423 in the compatibility library
    @Override
    public void onDestroyView() {
        if (getDialog() != null && getRetainInstance())
            getDialog().setDismissMessage(null);
        super.onDestroyView();
    }
}