我正在尝试构建一个简单的“flappybird”游戏,我需要鸟的图像倾斜,向上时指向上方,反之亦然。但是,当旋转我的图像时,它会在稍微下落或点击屏幕后部分或完全从屏幕上消失。有人可以告诉我如何解决这个问题吗?
matrix = new Matrix();
if(angle > minAngle && angle < maxAngle && !boosting) {
angle+=avel;
matrix.postRotate(angle);
}
if(boosting) {
angle = -20;
matrix.postRotate(angle);
speed = -30;
}
rotatedBitmap = Bitmap.createBitmap(bitmap, 0, 0, 50, 50, matrix, true);
bitmap = rotatedBitmap;
//Now the player object gets this rotated image and adds it to the Canvas
最佳答案
private Bitmap rotation(Bitmap myBitmap) {
int rotate = 90; // degree of rotation;
Matrix matrix = new Matrix();
matrix.postRotate(rotate);
if (myBitmap != null) {
return myBitmap = Bitmap.createBitmap(myBitmap, 0, 0, myBitmap.getWidth(),
myBitmap.getHeight(), matrix, true);
}
return myBitmap;
}
关于android - 在 Android Studio 中旋转移动位图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41505368/