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我想要一個簡單的圖像動畫去。我想讓它看起來好像直升機的螺旋槳葉片正在轉動。我爲直升機拍攝了3張圖像，並根據動畫進度顯示其中一張圖像。問題是所有三個圖像最終彼此重疊，而不是一次顯示一個圖像，從而創建動畫。這是我到目前爲止所做的，我甚至試圖通過做這個canvas.drawColor（Color.BLACK）來清除畫布，但是這將清除整個畫布，這不是我想要的。如何做Android圖像動畫
這是我有：
在視圖類1）：
靜態類直升機{ 私人長期mLastUpdate; private long mProgress = 0; private final float mX; private final float mY;
private final Bitmap mHelicopter1;
private final Bitmap mHelicopter2;
private final Bitmap mHelicopter3;
private final float mRadius;
Helicopter(long mLastUpdate, float mX, float mY,
Bitmap helicopter1, Bitmap helicopter2, Bitmap helicopter3) {
this.mLastUpdate = mLastUpdate;
this.mX = mX;
this.mY = mY;
this.mHelicopter1 = helicopter1;
this.mHelicopter2 = helicopter2;
this.mHelicopter3 = helicopter3;
mRadius = ((float) mHelicopter1.getWidth())/2f;
}
public void update(long now) {
mProgress += (now - mLastUpdate);
if(mProgress >= 400L)
{
mProgress = 0;
}
mLastUpdate = now;
}
public void setNow(long now) {
mLastUpdate = now;
}
public void draw(Canvas canvas, Paint paint)
{
if (mProgress < 150L)
{
canvas.drawBitmap(mHelicopter1, mX - mRadius, mY - mRadius, paint);
}
else if (mProgress < 300L)
{
canvas.drawBitmap(mHelicopter2, mX - mRadius, mY - mRadius, paint);
}
else if(mProgress < 400L)
{
canvas.drawBitmap(mHelicopter3, mX - mRadius, mY - mRadius, paint);
}
}
public boolean done() {
return mProgress > 700L;
}
}
private ArrayList<Helicopter> mHelicopters = new ArrayList<Helicopter>();
2）這是被稱爲一個線程的run（）：
private void doDraw(Canvas canvas)
{
final long now = SystemClock.elapsedRealtime();
canvas.save();
for (int i = 0; i < mHelicopters.size(); i++) {
final Helicopter explosion = mHelicopters.get(i);
explosion.update(now);
}
for (int i = 0; i < mHelicopters.size(); i++) {
final Helicopter explosion = mHelicopters.get(i);
explosion.draw(canvas, mPaint);
}
canvas.restore();
}
有人可以幫助我嗎？我看過很多關於動畫網頁的例子，他們似乎總是涉及文本，但不涉及圖像。謝謝。