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();