android – 自定义视图中的画布上的Tween动画

概述我有一个扩展View的类,我在onDraw()方法的画布中绘制了我需要的所有内容,如下所示： protected void onDraw(Canvas canvas) { synchronized (this) { float h = mHeight; float w = mWidth; 我有一个扩展VIEw的类,我在onDraw()方法的画布中绘制了我需要的所有内容,如下所示：

protected voID onDraw(Canvas canvas) {        synchronized (this) {                float h = mHeight;                float w = mWIDth;                canvas.drawcolor(color.WHITE);                float roadline= (85.0f/100.0f)*h;                canvas.drawBitmap(mtop,roadline-mtop.getHeight(),null);                //this is what I'd like to animate                canvas.drawBitmap(mSmoke);        }    }

如何在此处制作动画(补间动画)？

解决方法 您无法在另一个类的onDraw()方法中绘制ImageVIEw.

这可能是你所追求的更多.

public class SimpleAnimation extends Activity {Sprite sprite;@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    sprite = new Sprite(this);    setContentVIEw(sprite);}class Sprite extends ImageVIEw {    Bitmap bitmap;    Paint paint;    RotateAnimation rotate;    AlphaAnimation blend;    ScaleAnimation scale;    AnimationSet spriteAnimation;    float centerX;    float centerY;    float offsetX;    float offsetY;    public Sprite(Context context) {        super(context);        bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.icon);        offsetX = bitmap.getWIDth() / 2;        offsetY = bitmap.getHeight() / 2;        paint = new Paint();        paint.setAntiAlias(true);        paint.setFilterBitmap(true);    }    @OverrIDe    protected voID onDraw(Canvas canvas) {        super.onDraw(canvas);        if (spriteAnimation == null) {            centerX = canvas.getWIDth() / 2;            centerY = canvas.getHeight() / 2;            createAnimation(canvas);        }        canvas.drawBitmap(bitmap,centerX - offsetX,centerY - offsetY,paint);    }    private voID createAnimation(final Canvas canvas) {        rotate = new RotateAnimation(0,360,centerX,centerY);        rotate.setRepeatMode(Animation.REVERSE);        rotate.setRepeatCount(Animation.INFINITE);        scale = new ScaleAnimation(0,2,centerY);        scale.setRepeatMode(Animation.REVERSE);        scale.setRepeatCount(Animation.INFINITE);        scale.setInterpolator(new AccelerateDecelerateInterpolator());        spriteAnimation = new AnimationSet(true);        spriteAnimation.addAnimation(rotate);        spriteAnimation.addAnimation(scale);        spriteAnimation.setDuration(10000L);        startAnimation(spriteAnimation);    }  }}

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