SingleChoiceDialogFragment.java

/*
 * Copyright (C) 2014 barter.li
 *
 * 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 li.barter.fragments.dialogs;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnDismissListener;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentManager;

import li.barter.utils.Logger;

/**
 * Single Choice Alert Dialog.
 * 
 * @author Vinay S Shenoy
 */
public class SingleChoiceDialogFragment extends DialogFragment {

    private static final String TAG = "SingleChoiceDialogFragment";

    /** Res Id for the Dialog Title. */
    private int                 mTitleId;

    /** Click Listener for the Dialog buttons. */
    private OnClickListener     mClickListener;

    /** On Dismiss Listener for the Dialog */
    private OnDismissListener   mOnDismissListener;

    /** Resource Id for the icon to be be used in the alert dialog. */
    private int                 mIconId;

    /** Boolean flag to identify if the dialog is cancelable. */
    private boolean             isCancellable;

    /** {@linkplain AlertDialog}'s THEME constants for the dialog theme. */
    private int                 mTheme;

    /**
     * Resource Id for an array to be added to the dialog items
     */
    private int                 mItemsId;

    @Override
    public Dialog onCreateDialog(final Bundle savedInstanceState) {

        if (savedInstanceState != null) {
            mTitleId = savedInstanceState.getInt(DialogKeys.TITLE_ID);
            isCancellable = savedInstanceState
                            .getBoolean(DialogKeys.CANCELLABLE);
            mIconId = savedInstanceState.getInt(DialogKeys.ICON_ID);
            mTheme = savedInstanceState.getInt(DialogKeys.THEME);
            mItemsId = savedInstanceState.getInt(DialogKeys.ITEMS_ID);
        }

        final Builder builder = new Builder(getActivity(), mTheme);

        if (mItemsId == 0) {
            throw new IllegalArgumentException("No items available to add");
        }

        builder.setItems(mItemsId, mClickListener);

        if (mIconId != 0) {
            builder.setIcon(mIconId);
        }
        if (mTitleId != 0) {
            builder.setTitle(mTitleId);
        }

        builder.setCancelable(isCancellable);
        setCancelable(isCancellable);
        return builder.create();
    }

    @Override
    public void onAttach(final Activity activity) {

        super.onAttach(activity);

        if (activity instanceof OnClickListener) {
            mClickListener = (OnClickListener) activity;
        }

        else {
            throw new IllegalStateException("Activity must implement DialogInterface.OnClickListener");
        }

        if (activity instanceof OnDismissListener) {
            mOnDismissListener = (OnDismissListener) activity;
        }
    }

    @Override
    public void onDismiss(final DialogInterface dialog) {
        super.onDismiss(dialog);
        if (mOnDismissListener != null) {
            mOnDismissListener.onDismiss(dialog);
        }
    }

    @Override
    public void onSaveInstanceState(final Bundle outState) {

        outState.putInt(DialogKeys.TITLE_ID, mTitleId);
        outState.putBoolean(DialogKeys.CANCELLABLE, isCancellable);
        outState.putInt(DialogKeys.ICON_ID, mIconId);
        outState.putInt(DialogKeys.THEME, mTheme);
        outState.putInt(DialogKeys.ITEMS_ID, mItemsId);
        super.onSaveInstanceState(outState);
    }

    public void show(final int theme, final int itemsId, final int iconId,
                    final int titleId, final FragmentManager manager,
                    final boolean cancellable, final String fragmentTag) {

        mTheme = theme;
        mItemsId = itemsId;
        mIconId = iconId;
        mTitleId = titleId;
        isCancellable = cancellable;

        try {
            super.show(manager, fragmentTag);
        } catch (final IllegalStateException e) {
            Logger.e(TAG, e, "Exception");
        }

    }

}