1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.example.android.lunarlander;
18
19import android.app.Activity;
20import android.os.Bundle;
21import android.util.Log;
22import android.view.Menu;
23import android.view.MenuItem;
24import android.widget.TextView;
25
26import com.example.android.lunarlander.LunarView.LunarThread;
27
28/**
29 * This is a simple LunarLander activity that houses a single LunarView. It
30 * demonstrates...
31 * <ul>
32 * <li>animating by calling invalidate() from draw()
33 * <li>loading and drawing resources
34 * <li>handling onPause() in an animation
35 * </ul>
36 */
37public class LunarLander extends Activity {
38    private static final int MENU_EASY = 1;
39
40    private static final int MENU_HARD = 2;
41
42    private static final int MENU_MEDIUM = 3;
43
44    private static final int MENU_PAUSE = 4;
45
46    private static final int MENU_RESUME = 5;
47
48    private static final int MENU_START = 6;
49
50    private static final int MENU_STOP = 7;
51
52    /** A handle to the thread that's actually running the animation. */
53    private LunarThread mLunarThread;
54
55    /** A handle to the View in which the game is running. */
56    private LunarView mLunarView;
57
58    /**
59     * Invoked during init to give the Activity a chance to set up its Menu.
60     *
61     * @param menu the Menu to which entries may be added
62     * @return true
63     */
64    @Override
65    public boolean onCreateOptionsMenu(Menu menu) {
66        super.onCreateOptionsMenu(menu);
67
68        menu.add(0, MENU_START, 0, R.string.menu_start);
69        menu.add(0, MENU_STOP, 0, R.string.menu_stop);
70        menu.add(0, MENU_PAUSE, 0, R.string.menu_pause);
71        menu.add(0, MENU_RESUME, 0, R.string.menu_resume);
72        menu.add(0, MENU_EASY, 0, R.string.menu_easy);
73        menu.add(0, MENU_MEDIUM, 0, R.string.menu_medium);
74        menu.add(0, MENU_HARD, 0, R.string.menu_hard);
75
76        return true;
77    }
78
79    /**
80     * Invoked when the user selects an item from the Menu.
81     *
82     * @param item the Menu entry which was selected
83     * @return true if the Menu item was legit (and we consumed it), false
84     *         otherwise
85     */
86    @Override
87    public boolean onOptionsItemSelected(MenuItem item) {
88        switch (item.getItemId()) {
89            case MENU_START:
90                mLunarThread.doStart();
91                return true;
92            case MENU_STOP:
93                mLunarThread.setState(LunarThread.STATE_LOSE,
94                        getText(R.string.message_stopped));
95                return true;
96            case MENU_PAUSE:
97                mLunarThread.pause();
98                return true;
99            case MENU_RESUME:
100                mLunarThread.unpause();
101                return true;
102            case MENU_EASY:
103                mLunarThread.setDifficulty(LunarThread.DIFFICULTY_EASY);
104                return true;
105            case MENU_MEDIUM:
106                mLunarThread.setDifficulty(LunarThread.DIFFICULTY_MEDIUM);
107                return true;
108            case MENU_HARD:
109                mLunarThread.setDifficulty(LunarThread.DIFFICULTY_HARD);
110                return true;
111        }
112
113        return false;
114    }
115
116    /**
117     * Invoked when the Activity is created.
118     *
119     * @param savedInstanceState a Bundle containing state saved from a previous
120     *        execution, or null if this is a new execution
121     */
122    @Override
123    protected void onCreate(Bundle savedInstanceState) {
124        super.onCreate(savedInstanceState);
125
126        // tell system to use the layout defined in our XML file
127        setContentView(R.layout.lunar_layout);
128
129        // get handles to the LunarView from XML, and its LunarThread
130        mLunarView = (LunarView) findViewById(R.id.lunar);
131        mLunarThread = mLunarView.getThread();
132
133        // give the LunarView a handle to the TextView used for messages
134        mLunarView.setTextView((TextView) findViewById(R.id.text));
135
136        if (savedInstanceState == null) {
137            // we were just launched: set up a new game
138            mLunarThread.setState(LunarThread.STATE_READY);
139            Log.w(this.getClass().getName(), "SIS is null");
140        } else {
141            // we are being restored: resume a previous game
142            mLunarThread.restoreState(savedInstanceState);
143            Log.w(this.getClass().getName(), "SIS is nonnull");
144        }
145    }
146
147    /**
148     * Invoked when the Activity loses user focus.
149     */
150    @Override
151    protected void onPause() {
152        super.onPause();
153        mLunarView.getThread().pause(); // pause game when Activity pauses
154    }
155
156    /**
157     * Notification that something is about to happen, to give the Activity a
158     * chance to save state.
159     *
160     * @param outState a Bundle into which this Activity should save its state
161     */
162    @Override
163    protected void onSaveInstanceState(Bundle outState) {
164        // just have the View's thread save its state into our Bundle
165        super.onSaveInstanceState(outState);
166        mLunarThread.saveState(outState);
167        Log.w(this.getClass().getName(), "SIS called");
168    }
169}
170