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/*
* Copyright (C) 2007 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.example.android.snake;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.TextView;
/**
* Snake: a simple game that everyone can enjoy.
*
* This is an implementation of the classic Game "Snake", in which you control a serpent roaming
* around the garden looking for apples. Be careful, though, because when you catch one, not only
* will you become longer, but you'll move faster. Running into yourself or the walls will end the
* game.
*
*/
public class Snake extends Activity {
/**
* Constants for desired direction of moving the snake
*/
public static int MOVE_LEFT = 0;
public static int MOVE_UP = 1;
public static int MOVE_DOWN = 2;
public static int MOVE_RIGHT = 3;
private static String ICICLE_KEY = "snake-view";
private SnakeView mSnakeView;
/**
* Called when Activity is first created. Turns off the title bar, sets up the content views,
* and fires up the SnakeView.
*
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.snake_layout);
mSnakeView = (SnakeView) findViewById(R.id.snake);
mSnakeView.setDependentViews((TextView) findViewById(R.id.text),
findViewById(R.id.arrowContainer), findViewById(R.id.background));
if (savedInstanceState == null) {
// We were just launched -- set up a new game
mSnakeView.setMode(SnakeView.READY);
} else {
// We are being restored
Bundle map = savedInstanceState.getBundle(ICICLE_KEY);
if (map != null) {
mSnakeView.restoreState(map);
} else {
mSnakeView.setMode(SnakeView.PAUSE);
}
}
mSnakeView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (mSnakeView.getGameState() == SnakeView.RUNNING) {
// Normalize x,y between 0 and 1
float x = event.getX() / v.getWidth();
float y = event.getY() / v.getHeight();
// Direction will be [0,1,2,3] depending on quadrant
int direction = 0;
direction = (x > y) ? 1 : 0;
direction |= (x > 1 - y) ? 2 : 0;
// Direction is same as the quadrant which was clicked
mSnakeView.moveSnake(direction);
} else {
// If the game is not running then on touching any part of the screen
// we start the game by sending MOVE_UP signal to SnakeView
mSnakeView.moveSnake(MOVE_UP);
}
return false;
}
});
}
@Override
protected void onPause() {
super.onPause();
// Pause the game along with the activity
mSnakeView.setMode(SnakeView.PAUSE);
}
@Override
public void onSaveInstanceState(Bundle outState) {
// Store the game state
outState.putBundle(ICICLE_KEY, mSnakeView.saveState());
}
/**
* Handles key events in the game. Update the direction our snake is traveling based on the
* DPAD.
*
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent msg) {
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_UP:
mSnakeView.moveSnake(MOVE_UP);
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
mSnakeView.moveSnake(MOVE_RIGHT);
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
mSnakeView.moveSnake(MOVE_DOWN);
break;
case KeyEvent.KEYCODE_DPAD_LEFT:
mSnakeView.moveSnake(MOVE_LEFT);
break;
}
return super.onKeyDown(keyCode, msg);
}
}
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