| /* |
| * Copyright (C) 2015 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 com.android.calculator2; |
| |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.app.Dialog; |
| import android.app.DialogFragment; |
| import android.app.FragmentManager; |
| import android.content.DialogInterface; |
| import android.os.Bundle; |
| import android.support.annotation.Nullable; |
| import android.support.annotation.StringRes; |
| import android.view.LayoutInflater; |
| import android.widget.TextView; |
| |
| /** |
| * Display a message with a dismiss putton, and optionally a second button. |
| */ |
| public class AlertDialogFragment extends DialogFragment implements DialogInterface.OnClickListener { |
| |
| public interface OnClickListener { |
| /** |
| * This method will be invoked when a button in the dialog is clicked. |
| * |
| * @param fragment the AlertDialogFragment that received the click |
| * @param which the button that was clicked (e.g. |
| * {@link DialogInterface#BUTTON_POSITIVE}) or the position |
| * of the item clicked |
| */ |
| void onClick(AlertDialogFragment fragment, int which); |
| } |
| |
| private static final String NAME = AlertDialogFragment.class.getName(); |
| private static final String KEY_MESSAGE = NAME + "_message"; |
| private static final String KEY_BUTTON_NEGATIVE = NAME + "_button_negative"; |
| private static final String KEY_BUTTON_POSITIVE = NAME + "_button_positive"; |
| private static final String KEY_TITLE = NAME + "_title"; |
| |
| /** |
| * Convenience method for creating and showing a DialogFragment with the given message and |
| * title. |
| * |
| * @param activity originating Activity |
| * @param title resource id for the title string |
| * @param message resource id for the displayed message string |
| * @param positiveButtonLabel label for second button, if any. If non-null, activity must |
| * implement AlertDialogFragment.OnClickListener to respond. |
| */ |
| public static void showMessageDialog(Activity activity, @StringRes int title, |
| @StringRes int message, @StringRes int positiveButtonLabel, @Nullable String tag) { |
| showMessageDialog(activity, title != 0 ? activity.getString(title) : null, |
| activity.getString(message), |
| positiveButtonLabel != 0 ? activity.getString(positiveButtonLabel) : null, |
| tag); |
| } |
| |
| /** |
| * Create and show a DialogFragment with the given message. |
| * |
| * @param activity originating Activity |
| * @param title displayed title, if any |
| * @param message displayed message |
| * @param positiveButtonLabel label for second button, if any. If non-null, activity must |
| * implement AlertDialogFragment.OnClickListener to respond. |
| */ |
| public static void showMessageDialog(Activity activity, @Nullable CharSequence title, |
| CharSequence message, @Nullable CharSequence positiveButtonLabel, @Nullable String tag) |
| { |
| final FragmentManager manager = activity.getFragmentManager(); |
| if (manager == null || manager.isDestroyed()) { |
| return; |
| } |
| final AlertDialogFragment dialogFragment = new AlertDialogFragment(); |
| final Bundle args = new Bundle(); |
| args.putCharSequence(KEY_MESSAGE, message); |
| args.putCharSequence(KEY_BUTTON_NEGATIVE, activity.getString(R.string.dismiss)); |
| if (positiveButtonLabel != null) { |
| args.putCharSequence(KEY_BUTTON_POSITIVE, positiveButtonLabel); |
| } |
| args.putCharSequence(KEY_TITLE, title); |
| dialogFragment.setArguments(args); |
| dialogFragment.show(manager, tag /* tag */); |
| } |
| |
| public AlertDialogFragment() { |
| setStyle(STYLE_NO_TITLE, android.R.attr.alertDialogTheme); |
| } |
| |
| @Override |
| public Dialog onCreateDialog(Bundle savedInstanceState) { |
| final Bundle args = getArguments() == null ? Bundle.EMPTY : getArguments(); |
| final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); |
| |
| final LayoutInflater inflater = LayoutInflater.from(builder.getContext()); |
| final TextView messageView = (TextView) inflater.inflate( |
| R.layout.dialog_message, null /* root */); |
| messageView.setText(args.getCharSequence(KEY_MESSAGE)); |
| builder.setView(messageView); |
| |
| builder.setNegativeButton(args.getCharSequence(KEY_BUTTON_NEGATIVE), null /* listener */); |
| |
| final CharSequence positiveButtonLabel = args.getCharSequence(KEY_BUTTON_POSITIVE); |
| if (positiveButtonLabel != null) { |
| builder.setPositiveButton(positiveButtonLabel, this); |
| } |
| |
| builder.setTitle(args.getCharSequence(KEY_TITLE)); |
| |
| return builder.create(); |
| } |
| |
| @Override |
| public void onClick(DialogInterface dialog, int which) { |
| final Activity activity = getActivity(); |
| if (activity instanceof AlertDialogFragment.OnClickListener /* always true */) { |
| ((AlertDialogFragment.OnClickListener) activity).onClick(this, which); |
| } |
| } |
| } |