我正在開發使用多個片段的Android應用程序。不知何故,在其中一個片段上,當我按下後退按鈕時,似乎什麼也沒有發生。當我再次按下它時,它會將我帶到前一個片段。什麼會導致這種行爲?我只想要一次按下後退按鈕。需要按兩次才能返回到前一個片段
這是片段的代碼:
public class FragmentMeerInfo extends Fragment
{
final static String ARG_POSITION = "position";
int mCurrentPosition = -1;
public SharedPreferences passedName;
private String knNaam;
public View view;
public FragmentMeerInfo()
{
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
if (savedInstanceState != null)
{
mCurrentPosition = savedInstanceState.getInt(ARG_POSITION);
}
view = inflater.inflate(R.layout.fragment_meerinfo, container, false);
passedName = getActivity().getSharedPreferences("PASSED_NAME", 0);
knNaam = passedName.getString("knNaam", null);
Typeface tfreg = Typeface.createFromAsset(getActivity().getAssets(),
"Roboto-Regular.ttf");
Typeface tfbold = Typeface.createFromAsset(getActivity().getAssets(),
"Roboto-Black.ttf");
SQLClass SQLReader = new SQLClass(getActivity());
ObjectKunstenaar kn = new ObjectKunstenaar();
kn = SQLReader.getSingleKn(knNaam);
TextView TvTitle = (TextView) view.findViewById(R.id.tvTitel);
TextView TvInfo = (TextView) view.findViewById(R.id.tvInfo);
ImageView IvImage = (ImageView) view.findViewById(R.id.imgKunstenaar);
TvTitle.setText("Biografie " + knNaam);
TvTitle.setTypeface(tfbold);
TvInfo.setText(kn.getKunstenaarInfo());
TvInfo.setTypeface(tfreg);
Bitmap bitmap;
final File image = new File(getActivity().getFilesDir()
.getAbsolutePath()
+ File.separator
+ "kn"
+ File.separator
+ String.valueOf(kn.getKunstenaarId())
+ File.separator
+ "thumb.jpg");
FileInputStream fi;
try
{
fi = new FileInputStream(image);
bitmap = BitmapFactory.decodeStream(fi);
fi.close();
IvImage.setImageBitmap(bitmap);
} catch (FileNotFoundException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
return view;
}
}
我敢肯定,我的代碼是不是最好的,但我還是一個初學者
編輯:我已經找到了我是什麼做錯了。我意外地打開了這個片段兩次,所以它也需要關閉兩次。感謝您的快速回復!
發表一些代碼如何將片段附加到活動? – Libin