如何旋轉android.graphics.Picture

Question

如何旋轉android.graphics.Picture 90度？

*注：沒有它不是以位圖形式

Answer 1

如果您正在覆蓋onDraw()那麼你就可以做到以下幾點：

canvas.save(); 
canvas.rotate(90f, picture.getWidth()/2, picture.getHeight/2); 
canvas.drawPicture(picture); 
canvas.restore(); 

如果您只想旋轉圖像本身，那麼你可以使用此方法：喜歡這個？]

public Picture rotatePicture(float degrees, Picture picture) { 
    int width = picture.getWidth(); 
    int height = picture.getHeight(); 

    Picture rotatedPicture = new Picture(); 
    Canvas canvas = rotatedPicture.beginRecording(width, height); 
    canvas.save(); 
    canvas.rotate(degrees, width/2, height/2); 
    picture.draw(canvas); 
    canvas.restore(); 
    rotatedPicture.endRecording(); 

    return rotatedPicture; 
}