android - 如何将位图图像从 Activity 传输到 Fragment

Question

我的 Activity 中有一个位图图像，如下所示:

Bitmap image4 = BitmapFactory.decodeResource(getResources(), R.drawable.hello);
        image1.setImageBitmap(image4);

我正在尝试使用以下代码以 fragment 形式传递此图像:

  FragmentManager fragmentManager = getFragmentManager();
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.addToBackStack(null);
                Secondfrag yourFragment = new Secondfrag();
                Bundle b = new Bundle();
                b.putParcelable("BitmapImage",image4);

                yourFragment.setArguments(b);
                fragmentTransaction.add(R.id.frag, yourFragment, "FRAGMENT");
               fragmentTransaction.commit();

并尝试像这样以 fragment 形式获取此图像:

Bundle b=this.getArguments();
        String page=b.getString("BitmapImage");

        image2.setImageURI(Uri.parse(page));

但是我的Fragment中没有图片显示。如何解决这个问题？

Answer 1

将其转化为字节数组

ByteArrayOutputStream stream = new ByteArrayOutputStream();
  bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
  byte[] byteArray = stream.toByteArray();

Bundle b = new Bundle();
b.putByteArray("image",byteArray);


  // your fragment code 
fragment.setArguments(b);

从目标 fragment 中获取值

byte[] byteArray = getArgument().getByteArrayExtra("image");
Bitmap bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);

归功于 https://stackoverflow.com/a/33797090/4316327