com.deange.textfaker.utils.FragmentUtils.java Source code

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Here is the source code for com.deange.textfaker.utils.FragmentUtils.java

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/*
 * Copyright 2013 Christian De Angelis
 *
 * 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 com.deange.textfaker.utils;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.util.Log;

import com.deange.textfaker.ui.dialog.PatchedDialogFragment;

public class FragmentUtils {

    private static final String TAG = FragmentUtils.class.getSimpleName();

    private FragmentUtils() {
    }

    /**
     * Finds a PatchedDialogFragment with a given callback, and sets it if non-null.
     * Should be used on any orientation changes to recapture references to dialog fragments
     *
     * @param outDialog the patcheddialogfragment to find
     * @param manager   the support fragment manager of the activity
     * @param callback  the patcheddialogfragment's callback object
     * @param dialogTag the tag associated with the dialog
     */
    @SuppressWarnings("unchecked")
    public static void findDialogFragment(PatchedDialogFragment outDialog, final FragmentManager manager,
            final Object callback, final String dialogTag) {
        if (outDialog == null) {
            try {
                outDialog = (PatchedDialogFragment) manager.findFragmentByTag(dialogTag);
                if (outDialog != null) {
                    outDialog.setCallback(callback);
                }
            } catch (final ClassCastException e) {
                Log.e(TAG,
                        "Error attempting to find DialogFragment with tag: \"" + dialogTag + "\": " + e.toString());
            }
        }
    }

    /**
     * Find a Fragment within a given activity, and recaptures the reference
     *
     * @param outFragment the fragment to find
     * @param manager     the support fragment manager of the activity
     * @param fragmentTag the tag associated with the fragment
     */
    public static void findFragment(Fragment outFragment, final FragmentManager manager, final String fragmentTag) {
        if (outFragment == null) {
            try {
                outFragment = manager.findFragmentByTag(fragmentTag);
            } catch (final ClassCastException e) {
                Log.e(TAG, "Error attempting to find Fragment with tag: \"" + fragmentTag + "\": " + e.toString());
            }
        }
    }

}