当调用内置方法 nextGaussian
抛出一个 IllegalMonitorStateException
: unlock of unowned monitor
double dispersion = RAND.nextGaussian() * 0.2;
在里面
@Override
public void stroke(Canvas c, float x, float y) {
}
这里调用
case MotionEvent.ACTION_MOVE:
style.stroke(mCanvas, x, y);
break;
}
return true;
}
然后在 Surface.java
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
getHistory().saveState();
break;
}
final float x = panHelper.translateX(event.getX());
final float y = panHelper.translateY(event.getY());
return controller.onTouch(event.getAction(), x, y);
}
代码崩溃:
java.lang.IllegalMonitorStateException: unlock of unowned monitor .
顶一下!
最佳答案
我怀疑这是操作系统中的错误(我遇到了完全相同的错误)。您可以尝试使用自制的高斯随机数生成器。这是我在一些旧代码中找到的 - 抱歉,我不记得我是从哪里得到的。
Random rand;
Boolean RG_y2_valid = false;
Double RG_y1;
Double RG_y2;
double rand_gauss()
{
double x1, x2, w;
if (RG_y2_valid)
{
RG_y2_valid = false;
return RG_y2;
}
do
{
x1 = 2.0 * rand.nextDouble() - 1.0;
x2 = 2.0 * rand.nextDouble() - 1.0;
w = x1 * x1 + x2 * x2;
} while ( w >= 1.0 );
w = Math.sqrt( (-2.0 * Math.log( w ) ) / w );
RG_y1 = x1 * w;
RG_y2 = x2 * w;
RG_y2_valid = true;
return RG_y1;
}
关于android - java.lang.IllegalMonitorStateException : unlock of unowned monitor at java. util.Random.nextGaussian(Random.java:187),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9353533/