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好了另一個活動，所以我需要開始碰撞檢測的另一項活動，我是一個初學者試圖讓這個簡單的遊戲，我實在不明白這一點...它是通過標記//這是我試圖開始另一個活動，在這裏我要開始它的地方，當前的代碼給我錯誤開始碰撞檢測
GameView.java文件，我需要啓動活動
package fi.itsn.jetfighter;
import android.content.Context;
import android.content.Intent;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.util.ArrayList;
import static android.support.v4.app.ActivityCompat.startActivity;
/**
* Created by h on 21.9.2016.
*/
public class GameView extends SurfaceView implements Runnable {
volatile boolean playing;
private Thread gameThread = null;
private Player player;
private Paint paint;
private Canvas canvas;
private SurfaceHolder surfaceHolder;
private Enemy[] enemies;
private Broccoli[] broccolis;
private int enemyCount = 3;
private int broccoliCount = 1;
private ArrayList<Star> stars = new
ArrayList<Star>();
//defining a boom object to display blast
private Boom boom;
public GameView(Context context, int screenX, int screenY) {
super(context);
player = new Player(context, screenX, screenY);
surfaceHolder = getHolder();
paint = new Paint();
int starNums = 100;
for (int i = 0; i < starNums; i++) {
Star s = new Star(screenX, screenY);
stars.add(s);
}
enemies = new Enemy[enemyCount];
for (int i = 0; i < enemyCount; i++) {
enemies[i] = new Enemy(context, screenX, screenY);
}
//initializing boom object
boom = new Boom(context);
broccolis = new Broccoli[broccoliCount];
for (int i = 0; i < broccoliCount; i++) {
broccolis[i] = new Broccoli(context, screenX, screenY);
}
}
@Override
public void run() {
while (playing) {
update();
draw();
control();
}
}
private void update() {
player.update();
//setting boom outside the screen
boom.setX(-250);
boom.setY(-250);
for (Star s : stars) {
s.update(player.getSpeed());
}
for (int i = 0; i < enemyCount; i++) {
enemies[i].update(player.getSpeed());
//if collision occurrs with player
if (Rect.intersects(player.getDetectCollision(), enemies[i].getDetectCollision())) {
//displaying boom at that location
boom.setX(enemies[i].getX());
boom.setY(enemies[i].getY());
enemies[i].setX(-200);
}
}
for (int i = 0; i < broccoliCount; i++) {
broccolis[i].update(player.getSpeed());
if (Rect.intersects(player.getDetectCollision(), broccolis[i].getDetectCollision())) {
startActivity(new Intent(this, end.class));
//This is the place I am trying to start another activity
}
}
}
private void draw() {
if (surfaceHolder.getSurface().isValid()) {
canvas = surfaceHolder.lockCanvas();
canvas.drawColor(Color.BLUE);
paint.setColor(Color.WHITE);
for (Star s : stars) {
paint.setStrokeWidth(s.getStarWidth());
canvas.drawPoint(s.getX(), s.getY(), paint);
}
canvas.drawBitmap(
player.getBitmap(),
player.getX(),
player.getY(),
paint);
for (int i = 0; i < enemyCount; i++) {
canvas.drawBitmap(
enemies[i].getBitmap(),
enemies[i].getX(),
enemies[i].getY(),
paint
);
}
for (int i = 0; i < broccoliCount; i++) {
canvas.drawBitmap(
broccolis[i].getBitmap(),
broccolis[i].getX(),
broccolis[i].getY(),
paint
);
}
//drawing boom image
canvas.drawBitmap(
boom.getBitmap(),
boom.getX(),
boom.getY(),
paint
);
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
private void control() {
try {
gameThread.sleep(17);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void pause() {
playing = false;
try {
gameThread.join();
} catch (InterruptedException e) {
}
}
public void resume() {
playing = true;
gameThread = new Thread(this);
gameThread.start();
}
@Override
public boolean onTouchEvent(MotionEvent motionEvent) {
switch (motionEvent.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_UP:
player.stopBoosting();
break;
case MotionEvent.ACTION_DOWN:
player.setBoosting();
break;
}
return true;
}
}
這裏是西蘭花java文件
package fi.itsn.jetfighter;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Rect;
import java.util.Random;
/**
* Created by h on 22.9.2016.
*/
public class Broccoli {
//bitmap for the enemy
//we have already pasted the bitmap in the drawable folder
private Bitmap bitmap;
private int x;
private int y;
private int speed = 1;
private int maxX;
private int minX;
private int maxY;
private int minY;
//creating a rect object
private Rect detectCollision;
public Broccoli(Context context, int screenX, int screenY) {
bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.broccoli);
maxX = screenX;
maxY = screenY;
minX = 0;
minY = 0;
Random generator = new Random();
speed = generator.nextInt(6) + 10;
x = screenX;
y = generator.nextInt(maxY) - bitmap.getHeight();
//initializing rect object
detectCollision = new Rect(x, y, bitmap.getWidth(), bitmap.getHeight());
}
public void update(int playerSpeed) {
x -= playerSpeed;
x -= speed;
if (x < minX - bitmap.getWidth()) {
Random generator = new Random();
speed = generator.nextInt(10) + 10;
x = maxX;
y = generator.nextInt(maxY) - bitmap.getHeight();
}
//Adding the top, left, bottom and right to the rect object
detectCollision.left = x;
detectCollision.top = y;
detectCollision.right = x + bitmap.getWidth();
detectCollision.bottom = y + bitmap.getHeight();
}
//adding a setter to x coordinate so that we can change it after collision
public void setX(int x){
this.x = x;
}
//one more getter for getting the rect object
public Rect getDetectCollision() {
return detectCollision;
}
//getters
public Bitmap getBitmap() {
return bitmap;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
public int getSpeed() {
return speed;
}
}
「的CURR ent代碼給我錯誤「 - 那麼，我想應該有一些問題。 –