byte转化为Bitmap,防止内存溢出

Java代码  
      
ByteArrayInputStream is =new ByteArrayInputStream(byte[]);        
BitmapFactory.Options options=new BitmapFactory.Options();         
options.inPurgeable = true;        
options.inInputShareable = true;        
options.inSampleSize = 2;        
try {        
    BitmapFactory.Options.class.getField("inNativeAlloc").setBoolean(options,true);        
} catch(Exception ex) {        
    ex.printStackTrace();        
}        
Bitmap imgBit = (new WeakReference<Bitmap>(BitmapFactory.decodeStream(is, null, options))).get();