我有一个片段，当用户选择从其他应用程序共享图像时应启动该片段。下面是我的片段代码。据我所知，您可以通过在具有MIME类型的清单文件中指定活动来启动活动。但是片段呢？
我的应用程序是使用Firebase的简单聊天应用程序。
问题是我希望用户完成以下步骤：
1。从其他应用程序中选择图片，然后在共享菜单中单击我的应用程序。
2。然后弹出“朋友”片段（如何实现？）
3。当用户单击一个朋友时，Friends片段将朋友作为列表视图包含在列表中，然后将所选图像发送给他们。（以whatsapp的形式）
Friends.java
public class Friends extends Fragment {
private RecyclerView rv;
private DatabaseReference dr,drUsers;
private FirebaseAuth auth;
private String user;
FirebaseRecyclerAdapter<FriendsData,FriendsViewHolder> frv;
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public Friends() {
// Required empty public constructor
}
public static Friends newInstance(String param1, String param2) {
Friends fragment = new Friends();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_friends, container, false);
rv = (RecyclerView)view.findViewById(R.id.friendsView);
auth = FirebaseAuth.getInstance();
user = auth.getCurrentUser().getUid();
dr = FirebaseDatabase.getInstance().getReference().child("Friends_Formed").child(user);
drUsers = FirebaseDatabase.getInstance().getReference().child("Chat_Profiles");
dr.keepSynced(true);
drUsers.keepSynced(true);
rv.setHasFixedSize(true);
rv.setLayoutManager(new LinearLayoutManager(getContext()));
//Uri imageUri = (Uri) getActivity().getIntent().getExtras().get(Intent.EXTRA_STREAM);
//System.out.println("IMAGE URI ISSSSSSSSSS "+ imageUri);
// Inflate the layout for this fragment
return view;
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onStart() {
super.onStart();
Query personsQuery = dr.orderByKey();
FirebaseRecyclerOptions<FriendsData> options =
new FirebaseRecyclerOptions.Builder<FriendsData>().setLifecycleOwner(this)
.setQuery(personsQuery, FriendsData.class)
.build();
frv = new FirebaseRecyclerAdapter<FriendsData, FriendsViewHolder>(options) {
@Override
protected void onBindViewHolder(@NonNull final FriendsViewHolder holder, int position, @NonNull FriendsData model) {
holder.setDate(model.getDate());
holder.setImage(model.getThumb_image());
final String listUsers = getRef(position).getKey();
if (!listUsers.equals(null))
drUsers.child(listUsers).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
final String username = dataSnapshot.child("name").getValue().toString();
String thumb = dataSnapshot.child("thumb_image").getValue().toString();
//String online = dataSnapshot.child("onlineStatus").getValue().toString();
if(dataSnapshot.hasChild("onlineStatus")){
String userOnline = dataSnapshot.child("onlineStatus").getValue().toString();
holder.setOnlineStatus(userOnline);
}
holder.setName(username);
holder.setImage(thumb);
//holder.setOnlineStatus(online);
holder.view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
CharSequence actions[] = new CharSequence[]{"Open "+username+"'s Profile","Chat with "+username};
AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle("Select an Action");
builder.setItems(actions, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
if (i == 0) {
Intent intent = new Intent(getContext(), ViewProfile.class);
intent.putExtra("id", listUsers);
startActivity(intent);
} else {
Intent intent = new Intent(getContext(), ChatActivity.class);
intent.putExtra("id", listUsers);
intent.putExtra("user_name", username);
startActivity(intent);
}
}
});
builder.show();
}
});
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
@NonNull
@Override
public FriendsViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.friends_status, parent, false);
return new FriendsViewHolder(view);
}
};
rv.setAdapter(frv);
}
public static class FriendsViewHolder extends RecyclerView.ViewHolder{
View view;
public FriendsViewHolder(View itemView) {
super(itemView);
view = itemView;
}
public void setDate(String date){
TextView username = (TextView)view.findViewById(R.id.status2);
username.setText(date);
}
public void setImage(String image){
CircleImageView thumb = (CircleImageView)view.findViewById(R.id.circleImageView2);
Picasso.get().load(image).placeholder(R.drawable.default_avatar).into(thumb);
}
public void setName(String name){
TextView username = (TextView)view.findViewById(R.id.name2);
username.setText(name);
}
public void setOnlineStatus(String onlineStatus){
ImageView image = (ImageView)view.findViewById(R.id.onlineStatus);
if(onlineStatus.equals("true")){
image.setVisibility(View.VISIBLE);
}else{
image.setVisibility(View.INVISIBLE);
}
}
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}