Android canvas画线-让线条变粗
这看起来应该有点微不足道，但是在我的 Android 应用程序中，我使用画布绘制一系列连接在一起的线条。由于某种原因，我的线条非常非常微弱。我想知道如何才能使线条变粗？这是我的代码..
for(int i=1; i<myArrayListOfValues.size(); i++){
Paint myPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
myPaint.setStrokeWidth(8/*1 /getResources().getDisplayMetrics().density*/);
myPaint.setColor(0xffff0000); //color.RED
canvas.drawLine(myArrayListOfValues.get(i), myArrayListOfValues.get(i), myArrayListOfValues.get(i-1), myArrayListOfValues.get(i-1), myPaint);
}
另一件事是..我绘制的线条和圆圈始终是黑色的.. setColor() 似乎从来没有任何效果。我尝试使用颜色名称（例如 color.red）甚至它们的十六进制值（例如 0xffff0000）
This seems like it should be somewhat trivial, however in my android app, I am using canvas to draw a series of lines that are connected together. For some reason my lines are very very faint and thin. I was wondering how can I make my lines thicker? Here is my code..
for(int i=1; i<myArrayListOfValues.size(); i++){
Paint myPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
myPaint.setStrokeWidth(8/*1 /getResources().getDisplayMetrics().density*/);
myPaint.setColor(0xffff0000); //color.RED
canvas.drawLine(myArrayListOfValues.get(i), myArrayListOfValues.get(i), myArrayListOfValues.get(i-1), myArrayListOfValues.get(i-1), myPaint);
}
Another thing is..my lines and circles that I draw are ALWAYS black.. setColor() never seems to have any effect. I've tried using the color names (e.g color.red) and even their hex values (e.g 0xffff0000)
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如果删除 ANTI_ALIAS_FLAG 会发生什么？另外，您应该将 Paint 构造函数移到 for 循环之外，这样就不会每次迭代都重新创建它。
What happens if you remove the ANTI_ALIAS_FLAG? Also, you should move the Paint constructor outside the for loop, so it doesn't get recreated every iteration.
试试这个（科特林）
Try this(kotlin)
将 的值更改
为更大的整数，例如：
它会使线条更粗
另请参阅 Paint.setStrokeWidth(float)
Change the value of
to a bigger integer, for instance:
it will make the line thicker
see also Paint.setStrokeWidth(float)
尝试在声明“mypaint”后立即包含此行
Try Including this line just after you decleare 'mypaint'