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我不需要任何答案!更新畫布動畫
我創建了一個應用程序,應該有氣泡在屏幕上跳動。 一切正在工作,但他們沒有被生活繪製。
下面的代碼(不是所有的代碼,但重要的代碼):
的氣泡類別:
public class Bubble{
private int ID;
private float coordX;
private float coordY;
private float velX;
private float velY;
private float radius;
private int color;
private boolean popped;
private boolean alive;
private boolean dead;
public Bubble(int coordX, int coordY, int velocityX, int velocityY, int ID, int color) {
this.coordX = coordX;
this.coordY = coordY;
this.velX = velocityX;
this.velY = velocityY;
this.radius = 30;
this.ID = ID;
this.color = color;
this.alive = true;
}
public void drawMe(Paint paint, Canvas canvas) {
int paintStartColor = paint.getColor();
paint.setColor(this.color);
canvas.drawCircle(this.coordX, this.coordY, radius, paint);
paint.setColor(paintStartColor);
Log.d("Bubble","drawn bubble [" + ID + "] at (" + this.coordX + "|" + this.coordY + ")");
}
public void update() {
//damit die bubble am rand anstößt und zurück prallt
if(this.coordX - this.radius <= 0) this.velX = - this.velX;
if(this.coordY - this.radius <= 0) this.velY = - this.velY;
if(this.coordX + this.radius >= MainActivity.getInstance().getScreenSize().x) this.velX = - this.velX;
if(this.coordY + this.radius >= MainActivity.getInstance().getScreenSize().y) this.velY = - this.velY;
coordX += velX;
coordY += velY;
updateRadius();
// Log.d("Bubble", "CoordX: " + coordX + ", velX: " + velX);
}
}
的繪圖方法:
public void drawBubbles() {
Paint paint = new Paint();
for(Bubble b : bubbles) {
b.drawMe(paint, MainActivity.getInstance().getCanvas());
}
}
而且遊戲循環:
while(this.isRunning()) {
updateBubbles(); //update bubbles just calls the update() function in every bubble (for each loop)
drawBubbles();
//...sleep...
}
繪製所有的氣泡,它的工作原理,但我只看到一個區別,當我離開(不接近!)的應用程序,然後回到它。我在循環中調用該方法,並且每秒調用60次,但爲什麼它不出現在屏幕上?我也無法使畫布無效。
好吧我添加了Bubble類和遊戲循環,我希望它已經足夠了...讓我知道如果你需要更多的代碼 – Finni