我想问当我尝试回到另一个片段时如何检测。
所以我有这个代码：
fragmentManager.replace(R.id.fragment_searched_data_xml, fragment).addToBackStack(null).commit();
这让我回到那个片段。现在的问题是：
当我从当前片段按下后退按钮时，我可以回到初始片段，我可以检测到它吗？
public static class FragmentMainClass extends Fragment {
int i;
public FragmentMainClass() {
}
public FragmentMainClass(int i) {
this.i = i;
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(
R.layout.fragment_searched_data, container, false);
TextView sn = (TextView) rootView.findViewById(R.id.stop_name);
TextView sc = (TextView) rootView.findViewById(R.id.stop_code);
String prefix = getArguments().getString("bussStopName");
if (sn != null && sc != null) {
if (prefix.contains("/")) {
if (prefix.contains("/ ")) {
sn.setText(prefix.replace("\"", "").split("/ ")[0] + "\n" + prefix.replace("\"", "").split("/ ")[1]);
sc.setText(getArguments().getString("bussStopCode"));
} else {
sn.setText(prefix.replace("\"", "").split("/")[0] + "\n" + prefix.replace("\"", "").split("/")[1]);
sc.setText(getArguments().getString("bussStopCode"));
}
} else {
sn.setPadding(20, 40, 0, 0);
sn.setText(prefix.replace("\"", ""));
sc.setText(getArguments().getString("bussStopCode"));
}
}
final LinearLayout child = (LinearLayout) rootView
.findViewById(R.id.search_result_data_box);
LayoutParams params = (LayoutParams) child.getLayoutParams();
//child.setVisibility(View.GONE);
// params.height = 0;
widthListView = container.getWidth();
rootView.setTranslationX(-container.getWidth());
rootView.animate().setStartDelay(300).translationX(0)
.withEndAction(new Runnable() {
@Override
public void run() {
conreq = new ConnnectionRequest("97", getArguments().getString("bussStopCode"));
//expand(child);
initializeResultList(rootView);
// rootView.setVisibility(View.INVISIBLE);
}
});
return rootView;
}
public static void expand(final View v) {
final int targtetHeight = v.getMeasuredHeight();
v.getLayoutParams().height = 0;
v.setVisibility(View.VISIBLE);
Animation a = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime,
Transformation t) {
v.getLayoutParams().height = interpolatedTime == 1 ? LayoutParams.WRAP_CONTENT
: (int) (targtetHeight * interpolatedTime);
v.requestLayout();
}
@Override
public boolean willChangeBounds() {
return true;
}
};
// 1dp/ms
a.setDuration((int) (targtetHeight / v.getContext().getResources()
.getDisplayMetrics().density));
v.startAnimation(a);
}
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
}
public void initializeResultList(View v) {
result_list = (ListView) v.findViewById(R.id.list_view_results);
//(PullToRefreshListView) v.findViewById(R.id.list_view_results);;
final ResultDataCustomAdapter customAdapter = new ResultDataCustomAdapter(getActivity(), R.layout.pull_refresh_list_item, conreq.getCollectedData().getBusRouteSetData());
//prlv.prepareForRefresh();
((PullToRefreshListView) result_list).setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh() {
// Do work to refresh the list here.
new GetDataTask().execute();
}
});
result_list.setAdapter(customAdapter);
result_list.setVisibility(View.VISIBLE);
result_list.setOnItemClickListener(new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> av, final View view,
final int i, long i2) {
view.animate().setDuration(500).translationX(widthListView).alpha(0).
withEndAction(new Runnable() {
@Override
public void run() {
//setResult(Activity.RESULT_OK,new Intent().putExtra("bussStopCode", data.get(i).getStopCode()).putExtra("bussStopName", data.get(i).getStopName()));
////int get 1
//data.remove(i);
int temporaryInteger = i;
//customAdapter.notifyDataSetChanged();
//view.setTranslationX(0);
Log.d("data",conreq.getCollectedData().getBusRouteSetData().get(temporaryInteger - 1).getRouteHeading());
Bundle bundle = new Bundle();
bundle.putString("busdestination", conreq.getCollectedData().getBusRouteSetData().get(temporaryInteger-1).getRouteHeading());
bundle.putString("busnumber", conreq.getCollectedData().getBusRouteSetData().get(temporaryInteger-1).getRouteNo());
Fragment fragment = new FragmentNextTripForStop();
fragment.setArguments(bundle);
FragmentTransaction fragmentManager = getFragmentManager().beginTransaction();
fragmentManager.setCustomAnimations(R.anim.left_right_anim_x_left,R.anim.left_right_anim_x_right);
fragmentManager.replace(R.id.fragment_searched_data_xml, fragment).addToBackStack(null).commit();
result_list.setVisibility(View.GONE);
// finish();
//overridePendingTransition(R.anim.right_left_anim_x_left,R.anim.right_left_anim_x_right);
}
});
}});
}
private class GetDataTask extends AsyncTask<Void, Void, String[]> {
@Override
protected String[] doInBackground(Void... params) {
// Simulates a background job.
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
;
}
return null;
}
@Override
protected void onPostExecute(String[] result) {
// Call onRefreshComplete when the list has been refreshed.
((PullToRefreshListView) result_list).onRefreshComplete();
super.onPostExecute(result);
}
}
}