创建一个空位图并在android中绘制画布

2 回答

• -3

  这可能比你想的更简单：

  int w = WIDTH_PX, h = HEIGHT_PX;
  
  Bitmap.Config conf = Bitmap.Config.ARGB_8888; // see other conf types
  Bitmap bmp = Bitmap.createBitmap(w, h, conf); // this creates a MUTABLE bitmap
  Canvas canvas = new Canvas(bmp);
  
  // ready to draw on that bitmap through that canvas
  

  在这里找到's a series of tutorials I' ve：Drawing with Canvas Series

  回复于 2024-04-27T13:35:53+08:00
• 177

  不要使用Bitmap.Config.ARGB_8888

  而是使用int w = WIDTH_PX，h = HEIGHT_PX;

  Bitmap.Config conf = Bitmap.Config.ARGB_4444; // see other conf types
  Bitmap bmp = Bitmap.createBitmap(w, h, conf); // this creates a MUTABLE bitmap
  Canvas canvas = new Canvas(bmp);
  
  // ready to draw on that bitmap through that canvas
  

  处理更多位图或大位图时，ARGB_8888会让您陷入OutOfMemory问题 . 或者更好的是，尝试避免使用ARGB选项本身 .

  回复于 2024-04-27T13:35:53+08:00