Question

public class GameView extends View {
    private Bitmap bmp1;
    private Bitmap bmp2;
    private Bitmap bmp3;
    private Bitmap bmp4;
    private Bitmap bmp5;
    private Bitmap bmp6;
    public GameView(Context context) {
        super(context);

        bmp1 = BitmapFactory.decodeResource(getResources(),R.drawable.candy1);
        bmp2 = BitmapFactory.decodeResource(getResources(),R.drawable.candy2);
        bmp3 = BitmapFactory.decodeResource(getResources(),R.drawable.candy3);
        bmp4 = BitmapFactory.decodeResource(getResources(),R.drawable.candy4);
        bmp5 = BitmapFactory.decodeResource(getResources(),R.drawable.candy5);
        bmp6 = BitmapFactory.decodeResource(getResources(),R.drawable.candy6);

//在这里我的6张图片我以这种方式制作它们来控制它们的位置x，y

}
@Override
protected void onDraw(Canvas canvas){
    Bitmap[] images = {bmp1 , bmp2 , bmp3 , bmp4 , bmp5 , bmp6};
    canvas.drawColor(Color.WHITE);
    for (int i = 0; i<306; i+=61)
    { 
        canvas.drawBitmap(bmp1, i, 0, null);
        canvas.drawBitmap(bmp2, i, 61, null);
        canvas.drawBitmap(bmp3, i, 122, null);
        canvas.drawBitmap(bmp4, i, 183, null);
        canvas.drawBitmap(bmp5, i, 244, null);
        canvas.drawBitmap(bmp6, i, 305, null);

//如何在循环中使用collections.shuffle随机插入6个图像，并插入具有这些位置的图像，我制作位图数组，但如何在collections.shuffle中使用它，以便它可以随机显示我的imgaes有这些位置？

}
}   
}

Answer 1

创建字段列表并在构造函数中添加位图。例如：

this.bitmaps = new ArrayList<Bitmap>();
//add bitmaps to that ArrayList
this.bitmaps.add(BitmapFactory.decodeResource(getResources(),R.drawable.candy1);
...

//now shuffle that list
Collections.shuffle(this.bitmaps, new Random());

现在用onDraw方法绘制它们：

for (int x = 0; x < 6; x++){
    //Don't repeat yourself
    for(int y = 0; y < 6; y++){
        canvas.drawBitmap(this.bitmaps.get(y), x * 61, y * 61, 0, null);
    }
}

这应该可以解决问题。

如何随机显示图像

1 个答案: