我们可以使用Matrix 来放缩我们得到的Bitmap 从而使我们的BItmap适应我们的手机屏幕
首先我们得先获取我们的手机屏幕的大小
WindowManager wm = (WindowManager) getContext().getSystemService( Context.WINDOW_SERVICE); int width = wm.getDefaultDisplay().getWidth(); int height = wm.getDefaultDisplay().getHeight();
public Bitmap resizeBitmap(Bitmap bitmap,int w,int h)
{
if(bitmap!=null)
{
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int newWidth = w;
int newHeight = h;
float scaleWight = ((float)newWidth)/width;
float scaleHeight = ((float)newHeight)/height;
Matrix matrix = new Matrix();
matrix.postScale(scaleWight, scaleHeight);
Bitmap res = Bitmap.createBitmap(bitmap, 0,0,width, height, matrix, true);
return res;
}
else{
return null;
}
}
Android 怎么使用Bitmap+Canvas 自适应屏幕
原文地址:http://blog.csdn.net/liangdong2014/article/details/46128473