I'm making an Android maze game. Currently, I'm using the UP/DOWN/LEFT/RIGHT button from the emulator. I would like to add the motion sensor to move the ball. How do I use the motion sensors? Is there any open source to control the ball?
http://images.plurk.com/4OmXYw7VZ76FYg2eufH4Bz.jpg
package com.chrischu.inclassassignment_3;
//import com.chrischu.mazegame.R;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.hardware.Sensor;
import android.hardware.SensorListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
@SuppressLint("ViewConstructor")
public class GameView extends View {
//width and height of the whole maze and width of lines which
//make the walls
private int width, height, lineWidth;
//size of the maze i.e. number of cells in it
private int mazeSizeX, mazeSizeY;
//width and height of cells in the maze
float cellWidth, cellHeight;
//the following store result of cellWidth+lineWidth
//and cellHeight+lineWidth respectively
float totalCellWidth, totalCellHeight;
//the finishing point of the maze
private int mazeFinishX, mazeFinishY;
private Maze maze;
private Activity context;
private Paint line, red, background;
public GameView(Context context, Maze maze) {
super(context);
this.context = (Activity)context;
this.maze = maze;
mazeFinishX = maze.getFinalX();
mazeFinishY = maze.getFinalY();
mazeSizeX = maze.getMazeWidth();
mazeSizeY = maze.getMazeHeight();
line = new Paint();
line.setColor(getResources().getColor(R.color.line));
red = new Paint();
red.setColor(getResources().getColor(R.color.position));
background = new Paint();
background.setColor(getResources().getColor(R.color.game_bg));
setFocusable(true);
this.setFocusableInTouchMode(true);
}
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
width = (w < h)?w:h;
height = width; //for now square mazes
lineWidth = 10; //for now 1 pixel wide walls
cellWidth = (width - ((float)mazeSizeX*lineWidth)) / mazeSizeX;
totalCellWidth = cellWidth+lineWidth;
cellHeight = (height - ((float)mazeSizeY*lineWidth)) / mazeSizeY;
totalCellHeight = cellHeight+lineWidth;
red.setTextSize(cellHeight*0.75f);
super.onSizeChanged(w, h, oldw, oldh);
}
protected void onDraw(Canvas canvas) {
//fill in the background
canvas.drawRect(0, 0, width, height, background);
boolean[][] hLines = maze.getHorizontalLines();
boolean[][] vLines = maze.getVerticalLines();
//iterate over the boolean arrays to draw walls
for(int i = 0; i < mazeSizeX; i++) {
for(int j = 0; j < mazeSizeY; j++){
float x = j * totalCellWidth;
float y = i * totalCellHeight;
if(j < mazeSizeX - 1 && vLines[i][j]) {
//we'll draw a vertical line
canvas.drawLine(x + cellWidth, //start X
y, //start Y
x + cellWidth, //stop X
y + cellHeight, //stop Y
line);
}
if(i < mazeSizeY - 1 && hLines[i][j]) {
//we'll draw a horizontal line
canvas.drawLine(x, //startX
y + cellHeight, //startY
x + cellWidth, //stopX
y + cellHeight, //stopY
line);
}
}
}
int currentX = maze.getCurrentX(),currentY = maze.getCurrentY();
//draw the ball
canvas.drawCircle((currentX * totalCellWidth)+(cellWidth/2), //x of center
(currentY * totalCellHeight)+(cellWidth/2), //y of center
(cellWidth*0.45f), //radius
red);
//draw the finishing point indicator
canvas.drawText("F",
(mazeFinishX * totalCellWidth)+(cellWidth*0.25f),
(mazeFinishY * totalCellHeight)+(cellHeight*0.75f),
red);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent evt) {
boolean moved = false;
switch(keyCode) {
case KeyEvent.KEYCODE_DPAD_UP:
moved = maze.move(Maze.UP);
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
moved = maze.move(Maze.DOWN);
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
moved = maze.move(Maze.RIGHT);
break;
case KeyEvent.KEYCODE_DPAD_LEFT:
moved = maze.move(Maze.LEFT);
break;
default:
return super.onKeyDown(keyCode,evt);
}
if(moved) {
//the ball was moved so we'll redraw the view
invalidate();
if(maze.isGameComplete()) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle(context.getText(R.string.finished_title));
LayoutInflater inflater = context.getLayoutInflater();
View view = inflater.inflate(R.layout.finish, null);
builder.setView(view);
View closeButton =view.findViewById(R.id.btnQuit);
closeButton.setOnClickListener(new OnClickListener() {
public void onClick(View clicked) {
if(clicked.getId() == R.id.btnQuit) {
context.finish();
}
}
});
AlertDialog finishDialog = builder.create();
finishDialog.show();
}
}
return true;
}
}
