本文介绍了RecyclerView的仅第一个CardView被着色的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经在Android Studio中创建了一个应用程序，并使用RecyclerView中的CardViews与Firebase Realtime数据库关联，用户可以在其中检查出勤情况，以便用户是否在假期(R，G，周六或周日)去了CardView是彩色的.但是在我的代码中，只有第一个CardView会变色.我已经通过Log语句检查了它是否遍历R和G的if-else语句.
I have created an app in Android Studio, using CardViews in RecyclerView in connection with Firebase Realtime database, in which user can check his attendance such that if the user came on a holiday(R,G, Saturday or Sunday) that CardView is colored. But in my code only the first CardView is getting colored. I have checked through Log statements that it's traversing through both R and G's if-else statements.
我的代码是:
public class frag2ofAttendanceNew extends Fragment {
String mPinFromFrag1ofAttendance;
String yearf1;
String monthf1;
private RecyclerView mRecyclerView;
DatabaseReference myRef;
DatabaseReference holidaysRef;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
Log.d("abcd","oncreate view reached");
final View v= inflater.inflate(R.layout.fragment_frag2of_attendance_new, container, false);
Log.d("abcd","oncreate view reached and layout inflated");
mRecyclerView = (RecyclerView)v.findViewById(R.id.recycler_view);
return v;
}
@Override
public void onStart(){
super.onStart();
Log.d("abcd","onstart reached");
Bundle b = getArguments();
if(b!=null){
mPinFromFrag1ofAttendance = b.getString("mPinToFrag2ofAttendance");
Log.d("abcd","Receiving from frag1ofAttendance");
yearf1 = b.getString("year");
monthf1 = b.getString("month");
}
Log.d("abcd",mPinFromFrag1ofAttendance);
myRef = FirebaseDatabase.getInstance().getReference().child("Attendance_Records").child(mPinFromFrag1ofAttendance).child(yearf1).child(monthf1);
LinearLayoutManager layoutManager = new LinearLayoutManager(getContext(),LinearLayoutManager.VERTICAL,false);
mRecyclerView.setLayoutManager(layoutManager);
//mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
Log.d("abcd","setlayoutmanager");
FirebaseRecyclerOptions options = new FirebaseRecyclerOptions.Builder<Attendance_Records>().setQuery(myRef,Attendance_Records.class).build();
Log.d("abcd","recycleroptions reached");
FirebaseRecyclerAdapter<Attendance_Records,AttendanceViewHolder> adapter =
new FirebaseRecyclerAdapter<Attendance_Records, AttendanceViewHolder>
(options) {
@NonNull
@Override
public AttendanceViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Log.d("abcd","oncreateviewholder reached");
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card,parent,false);
Log.d("abcd","cardview inflated");
return new AttendanceViewHolder(view);
}
@Override
protected void onBindViewHolder(AttendanceViewHolder holder, int position, Attendance_Records model) {
holidaysRef=FirebaseDatabase.getInstance().getReference().child("Holidays");
final String userdate = model.getDate();
try {
Log.d("abcd","StringTodate about to be called");
StringToDate(userdate);
} catch (ParseException e) {
e.printStackTrace();
}
holidaysRef.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(final DataSnapshot dataSnapshot) {
if(dataSnapshot.child(userdate).exists()){
Log.d("abcd","date matched");
final DatabaseReference tilldateRef = holidaysRef.child(userdate);
tilldateRef.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot1) {
if(dataSnapshot1.child("G").exists()){
Log.d("abcd","its G");
CardView cv = getView().findViewById(R.id.card_view);
Log.d("abcd","cardview found");
cv.setCardBackgroundColor(Color.CYAN);
Log.d("abcd","changed cv color");
}
else if(dataSnapshot1.child("R").exists()){
Log.d("abcd","its R");
CardView cv = getView().findViewById(R.id.card_view);
Log.d("abcd","cardview found");
cv.setCardBackgroundColor(Color.MAGENTA);
Log.d("abcd","changed cv color");
}
else if(day==7){
Log.d("abcd","its Saturday");
CardView cv = getView().findViewById(R.id.card_view);
Log.d("abcd","cardview found");
cv.setCardBackgroundColor(Color.GRAY);
Log.d("abcd","changed cv color");
}
else if(day==1){
Log.d("abcd","its Sunday");
CardView cv = getView().findViewById(R.id.card_view);
Log.d("abcd","cardview found");
cv.setCardBackgroundColor(Color.DKGRAY);
Log.d("abcd","changed cv color");
}
else{
Log.d("abcd","None from G,R or Weekend");
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
holder.setYear(model.getYear());
holder.setMonth(model.getMonth());
holder.setDate(model.getDate());
holder.setIntime(model.getInTime());
holder.setOuttime(model.getOutTime());
holder.setStatus(model.getStatus());
holder.setEntrydate(model.getEntryDate());
holder.setMyid(model.getMyID());
Log.d("abcd","onbindviewholder reached");
}
};
mRecyclerView.setAdapter(adapter);
adapter.startListening();
}
private void StringToDate(String date) throws ParseException{
Log.d("abcd","StringtoDate reached");
DateFormat formatter = null;
Date convertedDate = null;
formatter = new SimpleDateFormat("dd-MM-yyyy");
convertedDate = (Date)formatter.parse(date);
Log.d("abcd","date converted");
Calendar c = Calendar.getInstance();
Log.d("abcd","Calendar getInstance reached");
c.setTime(convertedDate);
Log.d("abcd","userdate set in Calendar");
day = c.get(Calendar.DAY_OF_WEEK);
Log.d("abcd","day of week is "+day);
}
public class AttendanceViewHolder extends RecyclerView.ViewHolder{
TextView vhyear, vhmonth, vhdate, vhintime, vhouttime, vhentrydate, vhstatus, vhmyid;
public AttendanceViewHolder(View itemView){
super(itemView);
Log.d("abcd","attendanceviewholder reached");
vhyear = itemView.findViewById(R.id.year);
vhmonth = itemView.findViewById(R.id.month);
vhdate = itemView.findViewById(R.id.date);
vhintime = itemView.findViewById(R.id.inTime);
vhouttime = itemView.findViewById(R.id.outTime);
vhentrydate = itemView.findViewById(R.id.entryDate);
vhstatus = itemView.findViewById(R.id.status);
vhmyid = itemView.findViewById(R.id.userId);
Log.d("abcd","textviews found");
}
public void setYear(String year) {
Log.d("abcd","setyear reached");
vhyear.setText(year);
Log.d("abcd",vhyear.getText().toString());
}
public void setMonth(String month) {
Log.d("abcd","setmonth reached");
vhmonth.setText(month);
}
public void setDate(String date) {
Log.d("abcd","setdate reached");
vhdate.setText(date);
}
public void setIntime(String inTime) {
Log.d("abcd","setintime reached");
vhintime.setText(inTime);
}
public void setOuttime(String outTime) {
Log.d("abcd","setouttime reached");
vhouttime.setText(outTime);
}
public void setEntrydate(String entrydate){
Log.d("abcd","setentrydate reached");
vhentrydate.setText(entrydate);
}
public void setStatus(String status){
Log.d("abcd","setstatus reached");
vhstatus.setText(status);
}
public void setMyid(String myid){
Log.d("abcd","setmyid reached");
vhmyid.setText(myid);
}
}
}
更新
我在假期表中取得了假期，但仍然无法为周末上色.我应该把这些条件放在其他地方吗?
I have achieved for holidays in holidays table but still not able to color the weekends. Should I put those conditions somewhere else?
推荐答案
您应在ViewHolder中定义CardView:
You should define the CardView in the ViewHolder:
CardView cv;
public AttendanceViewHolder(View itemView){
super(itemView);
Log.d("abcd","attendanceviewholder reached");
vhyear = itemView.findViewById(R.id.year);
cv = itemView.findViewById(R.id.card_view);
...
}
然后使用
holder.cv.setCardBackgroundColor(Color.CYAN);
代替
CardView cv = getView().findViewById(R.id.card_view);
Log.d("abcd","cardview found");
cv.setCardBackgroundColor(Color.CYAN);
这篇关于RecyclerView的仅第一个CardView被着色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！