Try Like this
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);//
    startActivityForResult(Intent.createChooser(intent, "Select Picture"),PICK_IMAGE);
OnActivityResult for get image
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == PICK_IMAGE)
    {
        if (resultCode == Activity.RESULT_OK)
        {
            if (data != null)
            {
                try
                {
                    Bitmap bitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), data.getData());
                } catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        } else if (resultCode == Activity.RESULT_CANCELED)
        {
            Toast.makeText(getActivity(), "Cancelled", Toast.LENGTH_SHORT).show();
        }
    } }
Add permissions in Manifest File
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"  />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>