trying to use a recycled bitmap android.graphics.Bitmap

异常：trying to use a recycled bitmap android.graphics.Bitmap

概意:试图使用已经recycled的Bitmap

一般情况下我们在对Bitmap进行Matrix的各种缩放、平移等处理，然后createBitmap，再对之前的Bitmap进行recycle处理。

例如：

Bitmap oldBitmap= BitmapFactory.decodeFile(pathName);
Matrix matrix = new Matrix();
matrix.setScale(0.5f, 0.5f);
Bitmap newBitmap= Bitmap.createBitmap(bitmapDecode, 0, 0, 
oldBitmap.getWidth(), oldBitmap.getHeight(), matrix, true);
if(!oldBitmap.isRecycled()){oldBitmap.recycle();
}

异常的根本问题出在“Bitmap.createBitmap”函数这里：

 /*** Returns an immutable bitmap from subset of the source bitmap,* transformed by the optional matrix. The new bitmap may be the* same object as source, or a copy may have been made. It is* initialized with the same density as the original bitmap.* * If the source bitmap is immutable