1、将图片转换成二进制流
public byte[] getBitmapByte(Bitmap bitmap){
ByteArrayOutputStream out = new ByteArrayOutputStream();
//参数1转换类型,参数2压缩质量,参数3字节流资源
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
try {
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return out.toByteArray();
}
2、将二进制流转换成图片(Bitmap)
public Bitmap getBitmapFromByte(byte[] temp){
if(temp != null){
Bitmap bitmap = BitmapFactory.decodeByteArray(temp, 0, temp.length);
return bitmap;
}else{
return null;
}
}
将二进制流转换成图片(Drawable)
public Drawable getBitmapFromByte(byte[] temp){
if(temp != null){
Drawable drawable = Drawable.createFromStream(bais, "image");
return drawable ;
}else{
return null;
}
}
3、将Bitmap转换成Drawable
public static Bitmap drawableToBitmap(Drawable drawable){ int width = drawable.getIntrinsicWidth(); int height = drawable.getIntrinsicHeight(); Bitmap bitmap = Bitmap.createBitmap(width, height, drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bitmap); drawable.setBounds(0,0,width,height); drawable.draw(canvas); return bitmap; }
或
Drawable drawable = new FastBitmapDrawable(bitmap);
或
BitmapDrawable tempDrawable = (BitmapDrawable) drawable;
tempDrawable.getBitmap();