我有一个GameBoard
课,它扩展了SurfaceView
。我有一个OnDraw
方法:
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int size = getWidth()/8;
canvasSize = size;
pawnBitmap[0] = bigPawn;
pawnBitmap[1] = smallPawn;
float left_distance;
float top_distance;
for(int j = 0; j < 10; j++){
for (int i =0; i < 4; i++){
left_distance = i*size+(float)50;
top_distance = j*size+(float)10;
canvas.drawBitmap(pawnBitmap[0], left_distance, top_distance, paint);
canvas.drawBitmap(pawnBitmap[1], 6*size+i*30+(float)10, top_distance+30, paint);
}
}
}
pawnBoard
,bigPawn
和smallPawn
在此课程中公开,它们就像:
public BitmapFactory myBitmapFactory = new BitmapFactory();
public Bitmap[] pawnBitmap = new Bitmap[2];
public Bitmap bigPawn = Bitmap.createScaledBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.game_button_2), 90, 90, false);
public Bitmap smallPawn = Bitmap.createScaledBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.game_button_2), 30, 30, false);
我还有第二种方法,我正在改变bigPawn和smallPawn的图像:
public void setBitmaps(Bitmap one, Bitmap two){
this.paint = new Paint();
this.bigPawn = one;
this.smallPawn = two;
this.tmp=4;
invalidate();
}
但是在另一个(在另一个类中)调用此方法之后,图像不会改变。如果tmp
方法确实更改了图像,我使用setBitmaps()
变量进行了检查,这是正确的。但无效功能不起作用。为什么?
以下是我调用setBitmaps
方法的方法:
public void savePermutation(View view){
Bitmap tmpBitmap1 = Bitmap.createScaledBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.blue), 230, 230, false);
Bitmap tmpBitmap2 = Bitmap.createScaledBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.blue), 100, 100, false);
myGameBoard.setBitmaps(tmpBitmap1, tmpBitmap2);
}
我一直在寻找解决方案,但我找到的这些都没有帮助。
答案 0 :(得分:2)
覆盖surfaceCreated()
。然后添加以下行:
setWillNotDraw(false);