it.mb.whatshare.PatchedDialogFragment.java Source code

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Here is the source code for it.mb.whatshare.PatchedDialogFragment.java

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/**
 * PatchedDialogFragment.java Created on 18 Jun 2013 Copyright 2013 Michele
 * Bonazza <emmepuntobi@gmail.com>
 * 
 * This file is part of WhatsHare.
 * 
 * WhatsHare is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * WhatsHare. If not, see <http://www.gnu.org/licenses/>.
 */
package it.mb.whatshare;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.ContextThemeWrapper;
import android.view.KeyEvent;

/**
 * A {@link DialogFragment} that uses
 * {@link FragmentTransaction#commitAllowingStateLoss()} instead of
 * {@link FragmentTransaction#commit()} to
 * {@link FragmentTransaction#show(android.support.v4.app.Fragment)} the dialog
 * fragment.
 * 
 * <p>
 * This class is used to overcome <a
 * href="https://code.google.com/p/android/issues/detail?id=23761">this bug</a>
 * in the support package.
 * 
 * @author Michele Bonazza
 * 
 */
public class PatchedDialogFragment extends DialogFragment {

    private ContextThemeWrapper context;

    /*
     * (non-Javadoc)
     * 
     * @see android.support.v4.app.DialogFragment#show(android.support.v4.app.
     * FragmentManager, java.lang.String)
     */
    @Override
    public void show(FragmentManager manager, String tag) {
        FragmentTransaction transaction = manager.beginTransaction();
        transaction.add(this, tag);
        transaction.commitAllowingStateLoss();
    }

    /**
     * Returns a builder that will create a dialog that can only be canceled by
     * clicking OK or by pressing back.
     * 
     * <p>
     * Whenever the dialog is dismissed, {@link Activity#finish()} is called on
     * the argument <tt>activity</tt>.
     * 
     * <p>
     * The builder has already the correct theme set (for making it look ok even
     * on wonderful Android pre-v11), so {@link Builder#getContext()} can be
     * used to inflate layouts with.
     * 
     * @param activity
     *            the caller activity
     * @return a builder to be used to create a dialog with
     */
    protected Builder getNoUiBuilder(final FragmentActivity activity) {
        context = new ContextThemeWrapper(activity, R.style.DialogTheme);
        // @formatter:off
        return new AlertDialog.Builder(context).setCancelable(false)
                .setOnKeyListener(new DialogInterface.OnKeyListener() {
                    @Override
                    public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
                        if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP
                                && !event.isCanceled()) {
                            dialog.cancel();
                            activity.finish();
                            return true;
                        }
                        return false;
                    }
                }).setPositiveButton(android.R.string.ok, new OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        activity.finish();
                    }
                });
        // @formatter:on
    }

    /**
     * Returns a builder that will create a dialog that is hidden when clicking
     * ok or outside of it.
     * 
     * <p>
     * The builder has already the correct theme set (for making it look ok even
     * on wonderful Android pre-v11), so {@link Builder#getContext()} can be
     * used to inflate layouts with.
     * 
     * @param activity
     *            the caller activity
     * @return a builder to be used to create a dialog with
     */
    protected Builder getBuilder(final FragmentActivity activity) {
        context = new ContextThemeWrapper(activity, R.style.DialogTheme);
        // @formatter:off
        return new AlertDialog.Builder(context).setPositiveButton(android.R.string.ok, new OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                //  just hide dialog
            }
        });
        // @formatter:on
    }

    /**
     * Returns the context to be used when inflating XML resources.
     * 
     * @return the context for this dialog
     */
    protected Context getContext() {
        if (context != null)
            return context;
        return getActivity();
    }
}