我有MainActivity个fragment托管FragmentOne
还有一个名为Activity的{{1}}托管另一个DetailPagerActivity fragment
我想在DetailFragment中使用method中的DetailFragment
.. 我怎样才能做到这一点？
我试图使用FragmentOne等等，但失败了
我想从FragmentManager＆gt;中的getDetailReport()致电DeatilFragment onSwiped
这是我的 FragmentOne ：
FragmentOne这是我的 public class FragmentOne extends Fragment {
private RecyclerView mDetailRecyclerView;
private DetailAdapter mAdapter;
private boolean mNumberVisible;
private View view;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true); }
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_one_layout,
container, false);
mDetailRecyclerView = (RecyclerView)
view.findViewById(R.id.detail_recycler_view);
..
..
return view;
}
@Override
public void onResume() {
super.onResume();
updateUI();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean(SAVED_NUMBER_VISIBLE, mNumberVisible);
}
private class DetailHolder extends RecyclerView.ViewHolder
implements View.OnClickListener, View.OnLongClickListener {
private TextView mTitleTextView;
private Detail mDetail;
private RatingBar mRatingBar;
public DetailHolder(LayoutInflater inflater, ViewGroup parent) {
super(inflater.inflate(R.layout.list_item_detail,
parent, false));
itemView.setOnClickListener(this);
itemView.setOnLongClickListener(this);
mTitleTextView = (TextView) itemView.findViewById(R.id.detail_title);
mRatingBar = (RatingBar) itemView.findViewById(R.id.ratingBar);
}
public void bind(Detail detail) {
mDetail = detail;
mTitleTextView.setText(mDetail.getTitle());
mRatingBar.setRating(mDetail.getRate()); }
@Override
public void onClick(View view) {
Intent intent = DetailPagerActivity.newIntent(getActivity(),
mDetail.getId());
startActivity(intent); }
return true;
}
}
private class DetailAdapter extends RecyclerView.Adapter<DetailHolder> {
private List<Detail> mDetails;
public DetailAdapter(List<Detail> details) {
mDetails = details;
}
@Override
public DetailHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater =
LayoutInflater.from(getActivity());
return new DetailHolder(layoutInflater, parent);
}
@Override
public void onBindViewHolder(DetailHolder holder, int position) {
Detail detail = mDetails.get(position);
holder.bind(detail);
}
@Override
public int getItemCount() {
return mDetails.size();
}
public void setDetails(List<Detail> details) {
mDetails = details;
////////////////////////////////////////////////////////////////////////////////////////////////////////
ItemTouchHelper.SimpleCallback simpleCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
private Detail mDetail;
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(final RecyclerView.ViewHolder viewHolder, int direction) {
final int position = viewHolder.getAdapterPosition(); //get position which is swipe
if (direction == ItemTouchHelper.LEFT) { //if swipe left
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); //alert for confirm to delete
builder.setMessage("Are you sure to delete?"); //set message
builder.setPositiveButton("REMOVE", new DialogInterface.OnClickListener() { //when click on DELETE
@Override
public void onClick(DialogInterface dialog, int which) {
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("text/plain");
i.putExtra(Intent.EXTRA_TEXT, getDetailReport());
i.putExtra(Intent.EXTRA_SUBJECT,
getString(R.string.detail_report_subject));
i = Intent.createChooser(i, getString(R.string.send_report));
startActivity(i);
//////////////////////////////////////////////////////
// mAdapter.notifyItemRemoved(position); //item removed from recylcerview
// DetailLab.get(getActivity()).deleteDetail(mDetail);
// updateUI();
// updateNumbers();
dialog.dismiss();
// return;
}
}).setNegativeButton("CANCEL", new DialogInterface.OnClickListener() { //not removing items if cancel is done
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.show(); //show alert dialog
}
}
};
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleCallback);
itemTouchHelper.attachToRecyclerView(mDetailRecyclerView); //set swipe to recylcerview
}
}
}
：
DetailFargment答案 0 :(得分：0)
您应该将getDetailsReport()移出片段并进入某种数据/实用程序类 - 然后您可以从两个地方调用它。数据应该与UI分开，特别是如果您需要在多个活动/片段中使用它。
如果要在不相关的活动/片段之间进行通信，最简单的方法是使用Broadcast / BroadcastReceiver。这通常用于通知其他活动/片段需要更新的内容 - 而不是尝试查询其他活动/片段的数据。通常，片段/活动在接收广播时会更新，如果从头开始初始化则会处于良好状态。
当使活动/片段依赖于其他活动/片段时，您将遇到的问题是可以清除未显示的那个 - 因此您不能依赖实际发生的操作。