Question

大约5个月前，我面临着这个问题，我不再解决了（description）。我尝试了评论中的所有建议，但它们并没有帮助解决我的问题。最初，我认为该错误是由于Firebase引起的，但是最近我创建了另一个应用程序，该应用程序从本地来源而不是从Internet输入数据，并且无论如何都会出现问题。我应该使用ListView类仅加载一次数据吗？从理论上讲，应该解决该问题，但该应用程序将不再表现出色。下面是新应用的代码。

MainActivity.java

public class MainActivity extends AppCompatActivity {

private static final int MENU_ITEM = 0;

private RecyclerView mEndedList, mUpcomingList;
private AppointmentsAdapter mAdapterEnded, mAdapterUpcoming;
private List<Appointment> listGeneral, appointmentEndedList, appointmentUpcomingList;

FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference myRef = database.getReference("message");


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //prendiamo la dimensione del display
    Display display = getWindowManager().getDefaultDisplay();
    Point size = new Point();
    display.getSize(size);
    int width = size.x;
    int height = size.y;

    myRef.setValue("Hello, World!");

    appointmentUpcomingList = new ArrayList<>();
    appointmentEndedList = new ArrayList<>();
    listGeneral = new ArrayList<>();

    // height - 145(top layout) - (bottom layout) - 10 == (middle layout)

    //TODO: finiti (Ended) e in corso (Upcoming) NON VANNO BENE BISOGNA METTERE I FINITI IN UN POSTO PIù NASCOSTO
    //TODO: rivedere layout per appunatemnti confermati rifiutati e in corso di conferma
    //TODO: quando schiaccio conferma parte l'animazione del riempimento della barra e scompaiono i bottoni
    //TODO: arancio da confermare, rosso rifiutato e verde confermato
    //TODO: se il promemoria era ieri spariscono i pulsanti
    //TODO: c'è solo una lista devo dividere io le due liste in base al giorno

    listGeneral.add(new Appointment("title", "dettails", 'i'));
    listGeneral.add(new Appointment("title", "dettails", 'c'));
    listGeneral.add(new Appointment("title", "dettails", 'i'));
    listGeneral.add(new Appointment("title", "dettails", 'c'));
    listGeneral.add(new Appointment("title", "dettails", 'r'));
    listGeneral.add(new Appointment("title", "dettails", 'i'));
    listGeneral.add(new Appointment("title", "dettails", 'c'));
    listGeneral.add(new Appointment("title", "dettails", 'i'));
    listGeneral.add(new Appointment("title", "dettails", 'i'));
    listGeneral.add(new Appointment("title", "dettails", 'r'));

    for (Appointment appointment: listGeneral) {
        if (appointment.getDateIsPast()) {
             appointmentEndedList.add(appointment);
        } else {
            appointmentUpcomingList.add(appointment);
        }
    }

    //instance
    TextView numberAppointments = findViewById(R.id.numberAppointments);
    BottomNavigationView navigation = findViewById(R.id.navigation);

    mEndedList = findViewById(R.id.appointmentList);
    mAdapterEnded = new AppointmentsAdapter(appointmentEndedList, this,
            new AppointmentsAdapter.ClickListener() {
        @Override
        public void onClickListener(int position) {
            Intent start = new Intent(MainActivity.this, DettailsAppointment.class);
            startActivity(start);
        }
    });
    LinearLayoutManager layoutManager = new LinearLayoutManager(this);
    mEndedList.setLayoutManager(layoutManager);
    mEndedList.setAdapter(mAdapterEnded);


    mUpcomingList = findViewById(R.id.appointmentUpcomingList);
    mAdapterUpcoming = new AppointmentsAdapter(appointmentUpcomingList, this,
            new AppointmentsAdapter.ClickListener() {
        @Override
        public void onClickListener(int position) {
            Intent start = new Intent(MainActivity.this, DettailsAppointment.class);
            startActivity(start);
        }
    });
    LinearLayoutManager layoutManager2 = new LinearLayoutManager(this);
    mUpcomingList.setLayoutManager(layoutManager2);
    mUpcomingList.setAdapter(mAdapterUpcoming);


    numberAppointments.setText(String.valueOf(appointmentUpcomingList.size()));
    navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
    Menu menu = navigation.getMenu();
    MenuItem menuItem = menu.getItem(MENU_ITEM);
    menuItem.setChecked(true);
}

private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
        = new BottomNavigationView.OnNavigationItemSelectedListener() {

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case R.id.appointments:
                startActivity(new Intent(MainActivity.this, MainActivity.class));
                finish();
                return true;
            case R.id.message:
                startActivity(new Intent(MainActivity.this, MessageActivity.class));
                finish();
                return true;
        }
        return false;
    }
};

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

}

Appointment.java

public class Appointment {
private String title;
private String details;
private long date;
private char isConfirmated;

public Appointment(){}

public Appointment(String title, String details, char isConfirmated) {
    this.title = title;
    this.details = details;
    this.date = 1589201486198L;//TODO: System.currentTimeMillis();
    this.isConfirmated = isConfirmated;
}

/**
 * capire se today o tomorrow
 * @return
 */
public String getDate() {
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(date);
    int mYear = calendar.get(Calendar.YEAR);
    int mMonth = calendar.get(Calendar.MONTH);
    int mDay = calendar.get(Calendar.DAY_OF_MONTH);
    Date appointmentDate = new Date(date);

    Calendar currentCalendar = Calendar.getInstance();
    currentCalendar.setTimeInMillis(System.currentTimeMillis());
    int currentYear = currentCalendar.get(Calendar.YEAR);
    int currentMonth = currentCalendar.get(Calendar.MONTH);
    int currentDay = currentCalendar.get(Calendar.DAY_OF_MONTH);

    if (mDay == currentDay && mMonth == currentMonth && mYear == currentYear) {
        DateFormat df = new SimpleDateFormat("HH.mm");
        return df.format(appointmentDate) + ", today";
    } else if (mDay == currentDay+1 && mMonth == currentMonth && mYear == currentYear) {
        DateFormat df = new SimpleDateFormat("HH.mm");
        return df.format(appointmentDate) + ", tomorrow";
    } else {
        DateFormat df = new SimpleDateFormat("HH.mm, dd/MM/yy");
        return df.format(appointmentDate);
    }
}

/**
 * se l'appuntamento è passato
 */
public boolean getDateIsPast() {
    /*Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(date);
    Log.d("Date", String.valueOf(date));

    Calendar currentCalendar = Calendar.getInstance();
    currentCalendar.setTimeInMillis(System.currentTimeMillis());
    Log.d("Date ora", String.valueOf(System.currentTimeMillis()));*/

    long start = System.currentTimeMillis();
    long end = date;
    long dayRemaind = TimeUnit.MILLISECONDS.toDays(end - start);

    if (dayRemaind < 0) {
        return true;
    }

    /*if (calendar.compareTo(currentCalendar) < 0) {
        return true;
    }*/

    return false;
}

public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}

public String getDetails() {
    return details;
}

public void setDetails(String details) {
    this.details = details;
}

public long getLongDate() {
    return date;
}

public char isConfirmated() {
    return isConfirmated;
}

/**
 * c = confermato, r = rifiutato, i = in attesa
 * @param confirmated
 */
public void setConfirmated(char confirmated) {
    isConfirmated = confirmated;
}

}

AppointmentsAdapter.java

public class AppointmentsAdapter extends RecyclerView.Adapter<AppointmentsAdapter.MyViewHolder> {


public interface ClickListener {
    void onClickListener(int position);
}

private List<Appointment> appointmentsList;
private Context context;
private ClickListener mClickListner;

public AppointmentsAdapter(List<Appointment> appointmentsList, Context context, ClickListener clickListener) {
    this.appointmentsList = appointmentsList;
    this.context = context;
    this.mClickListner = clickListener;
}

@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View v = LayoutInflater.from(context).inflate(R.layout.notes_row, viewGroup, false);
    return new MyViewHolder(v);
}

@Override
public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, final int position) {
    Appointment appointment = appointmentsList.get(position);

    myViewHolder.title.setText(appointment.getTitle());
    myViewHolder.date.setText(appointment.getDate());

    if (appointment.getDateIsPast()) {
        if (appointment.isConfirmated() == 'c') {
            //myViewHolder.isDone.setTextColor(context.getResources().getColor(R.color.Green));
            myViewHolder.isDone.setText("");
            myViewHolder.btnConfirmated.setVisibility(View.INVISIBLE);
            myViewHolder.btnRefused.setVisibility(View.INVISIBLE);
            myViewHolder.confermatedText.setVisibility(View.VISIBLE);
            myViewHolder.circleImage.setImageDrawable(context.getResources().getDrawable(R.drawable.green_circle));
            myViewHolder.progressBarAppoinment.setBackgroundColor(context.getResources().getColor(R.color.Green));
        } else if (appointment.isConfirmated() == 'r'){
            //myViewHolder.isDone.setTextColor(context.getResources().getColor(R.color.Red));
            myViewHolder.isDone.setText("");
            myViewHolder.btnConfirmated.setVisibility(View.INVISIBLE);
            myViewHolder.btnRefused.setVisibility(View.INVISIBLE);
            myViewHolder.refusedText.setVisibility(View.VISIBLE);
            myViewHolder.circleImage.setImageDrawable(context.getResources().getDrawable(R.drawable.red_circle));
            myViewHolder.progressBarAppoinment.setBackgroundColor(context.getResources().getColor(R.color.Red));
        } else {
            myViewHolder.isDone.setText("");
            myViewHolder.isDone.setTextColor(context.getResources().getColor(R.color.Orange));
            myViewHolder.btnConfirmated.setVisibility(View.INVISIBLE);
            myViewHolder.btnRefused.setVisibility(View.INVISIBLE);
            myViewHolder.pendingConfirmationText.setVisibility(View.VISIBLE);
            myViewHolder.circleImage.setImageDrawable(context.getResources().getDrawable(R.drawable.orange_circle));
            myViewHolder.progressBarAppoinment.setBackgroundColor(context.getResources().getColor(R.color.Orange));
        }

    } else {

        if (appointment.isConfirmated() == 'c') {
            //myViewHolder.isDone.setTextColor(context.getResources().getColor(R.color.Green));
            myViewHolder.isDone.setText("");
            myViewHolder.btnConfirmated.setVisibility(View.INVISIBLE);
            myViewHolder.btnRefused.setVisibility(View.INVISIBLE);
            myViewHolder.confermatedText.setVisibility(View.VISIBLE);
            myViewHolder.circleImage.setImageDrawable(context.getResources().getDrawable(R.drawable.green_circle));
            myViewHolder.progressBarAppoinment.setBackgroundColor(context.getResources().getColor(R.color.Green));
        } else if (appointment.isConfirmated() == 'r') {
            //myViewHolder.isDone.setTextColor(context.getResources().getColor(R.color.Red));
            myViewHolder.isDone.setText("");
            myViewHolder.btnConfirmated.setVisibility(View.INVISIBLE);
            myViewHolder.btnRefused.setVisibility(View.INVISIBLE);
            myViewHolder.refusedText.setVisibility(View.VISIBLE);
            myViewHolder.circleImage.setImageDrawable(context.getResources().getDrawable(R.drawable.red_circle));
            myViewHolder.progressBarAppoinment.setBackgroundColor(context.getResources().getColor(R.color.Red));
        } else {
            myViewHolder.isDone.setTextColor(context.getResources().getColor(R.color.Orange));
            myViewHolder.isDone.setText("Pending confirmation");
            myViewHolder.circleImage.setImageDrawable(context.getResources().getDrawable(R.drawable.orange_circle));
            myViewHolder.progressBarAppoinment.setBackgroundColor(context.getResources().getColor(R.color.Orange));
        }
    }

    myViewHolder.btnConfirmated.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

        }
    });

    myViewHolder.btnRefused.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

        }
    });

    int listSize = appointmentsList.size();
    if (position == listSize-1) {
        myViewHolder.progressBarAppoinment.setVisibility(View.GONE);
    } else {
        myViewHolder.progressBarAppoinment.setVisibility(View.VISIBLE);
    }


    myViewHolder.showMoreInformation.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mClickListner != null) {
                mClickListner.onClickListener(position);
            } else {
                throw new IllegalArgumentException("DEVI IMPLEMENTARE L'INTERFACCIA");
            }
        }
    });

}


@Override
public int getItemCount() {
    return appointmentsList.size();
}

class MyViewHolder extends RecyclerView.ViewHolder {

    private ImageView circleImage, showMoreInformation;
    private Button btnConfirmated, btnRefused;
    private TextView title, date, isDone, confermatedText, refusedText, pendingConfirmationText;
    private View progressBarAppoinment;

    public MyViewHolder(@NonNull View itemView) {
        super(itemView);
        btnConfirmated = itemView.findViewById(R.id.confirmationButton);
        btnRefused = itemView.findViewById(R.id.refusesButton);
        title = itemView.findViewById(R.id.titleText);
        date = itemView.findViewById(R.id.dateText);
        isDone = itemView.findViewById(R.id.doneText);
        progressBarAppoinment = itemView.findViewById(R.id.progressBarAppoinment);
        confermatedText = itemView.findViewById(R.id.confirmationText);
        refusedText = itemView.findViewById(R.id.refuseText);
        circleImage = itemView.findViewById(R.id.circleImage);
        pendingConfirmationText = itemView.findViewById(R.id.pendingConfirmationText);
        showMoreInformation = itemView.findViewById(R.id.showMoreInformation);
    }
}

}

将元素加载到回收站视图时出错

0 个答案: