android中实现图片绕X轴、Y轴、Z轴翻转可以使用matrix和camera，类似3D效果

具体参见代码：

public class FlipImgEffectView extends View {

private Context context ;

private Bitmap showBmp ;

private Matrix matrix ; //作用矩阵

private Camera camera ;

private int deltaX , deltaY ; //翻转角度差值

private int centerX , centerY ; //图片中心点

public FlipImgEffectView(Context context) {

super(context);

this.context = context ;

initData();

}

private void initData(){

showBmp = BitmapFactory.decodeResource(context.getResources(), R.drawable.flower);

centerX = showBmp.getWidth()/2 ;

centerY = showBmp.getHeight()/2 ;

matrix = new Matrix();

camera = new Camera();

}

int lastMouseX ;

int lastMouseY ;

@Override

public boolean dispatchTouchEvent(MotionEvent event) {

int x = (int) event.getX();

int y = (int) event.getY();

switch(event.getAction()) {

case MotionEvent.ACTION_DOWN:

lastMouseX = x ;

lastMouseY = y ;

break;

case MotionEvent.ACTION_MOVE:

int dx = x - lastMouseX ;

int dy = y - lastMouseY ;

deltaX += dx ;

deltaY += dy ;

break;

}

invalidate();

return true;

}

@Override

protected void onDraw(Canvas canvas) {

camera.save();

//绕X轴翻转

camera.rotateX(-deltaY);

//绕Y轴翻转

camera.rotateY(deltaX);

//设置camera作用矩阵

camera.getMatrix(matrix);

camera.restore();

//设置翻转中心点

matrix.preTranslate(-this.centerX, -this.centerY);

matrix.postTranslate(this.centerX, this.centerY);

canvas.drawBitmap(showBmp, matrix, null);

}

}

效果如图：