Android 为什么我的球没有显示颜色?
在我的项目中,我给球添加了颜色,但它没有显示出来。为什么? 我只发布了对我的问题有意义的部分代码…setColor()方法是否有问题或其他问题…提前感谢您的帮助 AnimationView.javaAndroid 为什么我的球没有显示颜色?,android,android-canvas,Android,Android Canvas,在我的项目中,我给球添加了颜色,但它没有显示出来。为什么? 我只发布了对我的问题有意义的部分代码…setColor()方法是否有问题或其他问题…提前感谢您的帮助 AnimationView.java public class AnimationView extends View{ public AnimationView(Context context, AttributeSet attrs) { super(context, attrs);
public class AnimationView extends View{
public AnimationView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
private final int FRAME_RATE=15;
private Paint paint;
private Handler h;
Ball myball;
int value;
public void setString(int value)
{
this.value = value;
System.out.println("value="+value);
Animation();
}
public void Animation()
{
h=new Handler();
paint=new Paint();
paint.setColor(Color.BLUE);
myball=new Ball(100,100,Color.BLUE,50);
myball.setDX(10);
myball.setDY(10);
myball.setColor(Color.BLUE);
}
}
protected void onDraw(Canvas c)
{
c.drawCircle(myball.getX(), myball.getY(),myball.getRadius(), myball.getPaint());
h.postDelayed(r, FRAME_RATE);
}
private Runnable r=new Runnable()
{ public void run()
{ invalidate();
}
};
Ball.java
public class Ball {
private Point p;
private int c;
private int r;
private int dx;
private int dy;
private Paint paint;
public static int count = 0;
public Ball(int x,int y,int col,int radius)
{
p=new Point(x,y);
c=col;
r=radius;
paint=new Paint();
dx=0;
dy=0;
}
public Paint getPaint()
{return paint;
}
public void setColor(int col)
{c=col;
}
}
drawCircle
从Paint
对象获取颜色。通过以下方式更改setColor
:
public void setColor(int col) {
c=col;
if (paint == null)
paint = new Paint();
paint.setColor(col);
}
drawCircle
从Paint
对象获取颜色。通过以下方式更改setColor
:
public void setColor(int col) {
c=col;
if (paint == null)
paint = new Paint();
paint.setColor(col);
}
drawCircle
从Paint
对象获取颜色。通过以下方式更改setColor
:
public void setColor(int col) {
c=col;
if (paint == null)
paint = new Paint();
paint.setColor(col);
}
drawCircle
从Paint
对象获取颜色。通过以下方式更改setColor
:
public void setColor(int col) {
c=col;
if (paint == null)
paint = new Paint();
paint.setColor(col);
}