| /* |
| * Copyright 2016, 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.managedprovisioning.common; |
| |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.app.Dialog; |
| import android.app.DialogFragment; |
| import android.content.DialogInterface; |
| import android.os.Bundle; |
| |
| /** |
| * Utility class wrapping a {@link AlertDialog} in a {@link DialogFragment} |
| * <p> In order to properly handle Dialog lifecycle we follow the practice of wrapping of them |
| * in a Dialog Fragment. |
| * <p> If buttons are to be used (enabled by setting a button message), the creator {@link Activity} |
| * must implement {@link SimpleDialogListener}. |
| */ |
| public class SimpleDialog extends DialogFragment { |
| private static final String TITLE = "title"; |
| private static final String MESSAGE = "message"; |
| private static final String NEGATIVE_BUTTON_MESSAGE = "negativeButtonMessage"; |
| private static final String POSITIVE_BUTTON_MESSAGE = "positiveButtonMessage"; |
| |
| /** |
| * Use the {@link Builder} instead. Keeping the constructor public only because |
| * a {@link DialogFragment} must have an empty constructor that is public. |
| */ |
| public SimpleDialog() { |
| } |
| |
| @Override |
| public AlertDialog onCreateDialog(Bundle savedInstanceState) { |
| final SimpleDialogListener dialogListener = (SimpleDialogListener) getActivity(); |
| |
| AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); |
| |
| Bundle args = getArguments(); |
| if (args.containsKey(TITLE)) { |
| builder.setTitle(args.getInt(TITLE)); |
| } |
| |
| if (args.containsKey(MESSAGE)) { |
| builder.setMessage(args.getInt(MESSAGE)); |
| } |
| |
| if (args.containsKey(NEGATIVE_BUTTON_MESSAGE)) { |
| builder.setNegativeButton(args.getInt(NEGATIVE_BUTTON_MESSAGE), |
| new DialogInterface.OnClickListener() { |
| @Override |
| public void onClick(DialogInterface dialog, int which) { |
| dialogListener.onNegativeButtonClick(SimpleDialog.this); |
| } |
| }); |
| } |
| |
| if (args.containsKey(POSITIVE_BUTTON_MESSAGE)) { |
| builder.setPositiveButton(args.getInt(POSITIVE_BUTTON_MESSAGE), |
| new DialogInterface.OnClickListener() { |
| @Override |
| public void onClick(DialogInterface dialog, int which) { |
| dialogListener.onPositiveButtonClick(SimpleDialog.this); |
| } |
| }); |
| } |
| |
| return builder.create(); |
| } |
| |
| /** |
| * Throws an exception informing of a lack of a handler for a dialog button click |
| * <p> Useful when implementing {@link SimpleDialogListener} |
| */ |
| public static void throwButtonClickHandlerNotImplemented(DialogFragment dialog) { |
| throw new IllegalArgumentException("Button click handler not implemented for dialog: " |
| + dialog.getTag()); |
| } |
| |
| public static class Builder implements DialogBuilder { |
| private Integer mTitle; |
| private Integer mMessage; |
| private Integer mNegativeButtonMessage; |
| private Integer mPositiveButtonMessage; |
| private Boolean mCancelable; |
| |
| /** |
| * Sets the title |
| * @param title Title resource id. |
| */ |
| public Builder setTitle(Integer title) { |
| mTitle = title; |
| return this; |
| } |
| |
| /** |
| * Sets the message |
| * @param message Message resource id. |
| */ |
| public Builder setMessage(int message) { |
| mMessage = message; |
| return this; |
| } |
| |
| /** |
| * Sets a message for the button. |
| * <p> Makes the button appear (without setting a button message, a button is not displayed) |
| * <p> Callback must be handled by a creator {@link Activity}, |
| * which must implement {@link SimpleDialogListener}. |
| * @param negativeButtonMessage Message resource id. |
| */ |
| public Builder setNegativeButtonMessage(int negativeButtonMessage) { |
| mNegativeButtonMessage = negativeButtonMessage; |
| return this; |
| } |
| |
| /** |
| * Sets a message for the button. |
| * <p> Makes the button appear (without setting a button message, a button is not displayed) |
| * <p> Callback must be handled by a creator {@link Activity}, |
| * which must implement {@link SimpleDialogListener}. |
| * @param positiveButtonMessage Message resource id. |
| */ |
| public Builder setPositiveButtonMessage(int positiveButtonMessage) { |
| mPositiveButtonMessage = positiveButtonMessage; |
| return this; |
| } |
| |
| /** |
| * Sets whether the dialog is cancelable or not. Default is true. |
| */ |
| public Builder setCancelable(boolean cancelable) { |
| mCancelable = cancelable; |
| return this; |
| } |
| |
| /** |
| * Creates an {@link SimpleDialog} with the arguments supplied to this builder. |
| */ |
| @Override |
| public SimpleDialog build() { |
| SimpleDialog instance = new SimpleDialog(); |
| Bundle args = new Bundle(); |
| |
| if (mTitle != null) { |
| args.putInt(TITLE, mTitle); |
| } |
| |
| if (mMessage != null) { |
| args.putInt(MESSAGE, mMessage); |
| } |
| |
| if (mNegativeButtonMessage != null) { |
| args.putInt(NEGATIVE_BUTTON_MESSAGE, mNegativeButtonMessage); |
| } |
| |
| if (mPositiveButtonMessage != null) { |
| args.putInt(POSITIVE_BUTTON_MESSAGE, mPositiveButtonMessage); |
| } |
| |
| if (mCancelable != null) { |
| instance.setCancelable(mCancelable); |
| } |
| |
| instance.setArguments(args); |
| return instance; |
| } |
| } |
| |
| /** |
| * Interface for handling callbacks from {@link SimpleDialog} buttons. |
| * |
| * <p>If multiple dialogs are used in a context of a single {@link Activity}, |
| * a consumer of the interface can differentiate between dialogs using |
| * e.g. a {@link DialogFragment#getTag()}, or {@link DialogFragment#getArguments()}. |
| */ |
| public interface SimpleDialogListener { |
| /** |
| * Called when a user clicks on the positive dialog button. |
| * <p> To be implemented by a host {@link Activity} object. |
| * @param dialog {@link DialogFragment} where the click happened. |
| */ |
| void onPositiveButtonClick(DialogFragment dialog); |
| |
| /** |
| * Called when a user clicks on the negative dialog button. |
| * <p> To be implemented by a host {@link Activity} object. |
| * @param dialog {@link DialogFragment} where the click happened. |
| */ |
| void onNegativeButtonClick(DialogFragment dialog); |
| } |
| } |