android.support.v4.app.MyDialogFragment.java Source code

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Here is the source code for android.support.v4.app.MyDialogFragment.java

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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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 android.support.v4.app;

/**
 * Static library support version of the framework's
 * {@link android.app.DialogFragment}. Used to write apps that run on platforms
 * prior to Android 3.0. When running on Android 3.0 or above, this
 * implementation is still used; it does not try to switch to the framework's
 * implementation. See the framework SDK documentation for a class overview.
 */
public class MyDialogFragment extends DialogFragment {

    /**
     * Display the dialog, adding the fragment to the given FragmentManager.
     * This is a convenience for explicitly creating a transaction, adding the
     * fragment to it with the given tag, and committing it. This does
     * <em>not</em> add the transaction to the back stack. When the fragment is
     * dismissed, a new transaction will be executed to remove it from the
     * activity.
     *
     * @param manager The FragmentManager this fragment will be added to.
     * @param tag     The tag for this fragment, as per
     *                {@link FragmentTransaction#add(Fragment, String)
     *                FragmentTransaction.add}.
     */
    public void show(FragmentManager manager, String tag) {
        mDismissed = false;
        mShownByMe = true;
        FragmentTransaction ft = manager.beginTransaction();
        ft.add(this, tag);
        // ft.commit();
        ft.commitAllowingStateLoss();
    }

    /**
     * Display the dialog, adding the fragment using an existing transaction and
     * then committing the transaction.
     *
     * @param transaction An existing transaction in which to add the fragment.
     * @param tag         The tag for this fragment, as per
     *                    {@link FragmentTransaction#add(Fragment, String)
     *                    FragmentTransaction.add}.
     * @return Returns the identifier of the committed transaction, as per
     * {@link FragmentTransaction#commit() FragmentTransaction.commit()}
     * .
     */
    public int show(FragmentTransaction transaction, String tag) {
        mDismissed = false;
        mShownByMe = true;
        transaction.add(this, tag);
        mViewDestroyed = false;
        // mBackStackId = transaction.commit();
        mBackStackId = transaction.commitAllowingStateLoss();
        return mBackStackId;
    }

    void dismissInternal(boolean allowStateLoss) {
        if (mDismissed) {
            return;
        }
        mDismissed = true;
        mShownByMe = false;
        if (mDialog != null) {
            mDialog.dismiss();
            mDialog = null;
        }
        mViewDestroyed = true;
        if (mBackStackId >= 0) {
            getFragmentManager().popBackStack(mBackStackId, FragmentManager.POP_BACK_STACK_INCLUSIVE);
            mBackStackId = -1;
        } else {
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            ft.remove(this);
            if (allowStateLoss) {
                ft.commitAllowingStateLoss();
            } else {
                // ft.commit();
                ft.commitAllowingStateLoss();
            }
        }
    }
}