When I click on attendance record and fill the details it keeps crashing app Crashes admin_attendanceSheet.xml ---------------------- android:layout_width="wrap_content" android:layout_height="wrap_content">
<include
android:id="@+id/ftoolbar"
layout="@layout/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:layout_editor_absoluteX="8dp"
/>
<Spinner
android:id="@+id/spinner5"
android:layout_width="368dp"
android:layout_height="30dp"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:entries="@array/classes"
android:layout_margin="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
tools:layout_editor_absoluteX="8dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_margin="10dp"
android:weightSum="4">
<TextView
android:fontFamily="@font/geometry"
android:layout_marginLeft="90dp"
android:id="@+id/mydate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Select your date"
android:textSize="25sp"
android:layout_marginTop="10dp"/>
</LinearLayout>
<RelativeLayout
android:layout_marginLeft="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<CalendarView
android:id="@+id/calenderView"
android:background="@drawable/shape"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/button12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="viewlist"
android:text="Submit"
android:background="@drawable/button"
android:layout_below="@id/calenderView"
android:layout_marginTop="40dp"
android:layout_centerHorizontal="true"/>
</RelativeLayout>
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.893"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="101dp" />
</LinearLayout>
</ScrollView>`
admin_attendanceSheet.java
package com.nanosh.myapplication;
import android.graphics.Color;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.CalendarView;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.nanosh.myapplication.R;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
public class admin_attendanceSheet extends AppCompatActivity {
ListView listView;
CalendarView calenderView;
TextView myDate;
Spinner class_name;
String classes;
//EditText date;
ArrayList Userlist = new ArrayList<>();
ArrayList Studentlist = new ArrayList<>();
DatabaseReference ref = FirebaseDatabase.getInstance().getReference();
DatabaseReference dbAttendance;
DatabaseReference dbStudent;
String required_date;
Toolbar mToolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_admin_attendance_sheet);
mToolbar=(Toolbar)findViewById(R.id.ftoolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle("Attendance Records");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
listView = (ListView) findViewById(R.id.list);
class_name = (Spinner) findViewById(R.id.spinner5);
calenderView=(CalendarView)findViewById(R.id.calenderView);
myDate=(TextView)findViewById(R.id.mydate);
classes = class_name.getSelectedItem().toString();
calenderView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
@Override
public void onSelectedDayChange(@NonNull CalendarView view, int year, int month, int dayOfMonth) {
String date=(dayOfMonth+1)+"/"+month+"/"+year;
myDate.setText(date);
}
});
}
public void display_list(final ArrayList userlist) {
Studentlist.clear();
required_date = myDate.getText().toString();
dbAttendance = ref.child("attendance");
dbAttendance.child(required_date).addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
// Result will be holded Here
Studentlist.add("SID "+" CGA "+" SPM "+" DS "+" EJ "+ " LSA");
for (Object sid : userlist) {
//DataSnapshot dsp=dataSnapshot.child(sid.toString());
String CGA=dataSnapshot.child(sid.toString()).child("CGA").getValue().toString().substring(0,1);
String SPM=dataSnapshot.child(sid.toString()).child("SPM").getValue().toString().substring(0,1);
String DS=dataSnapshot.child(sid.toString()).child("DS").getValue().toString().substring(0,1);
String EJ=dataSnapshot.child(sid.toString()).child("EJ").getValue().toString().substring(0,1);
String LSA=dataSnapshot.child(sid.toString()).child("LSA").getValue().toString().substring(0,1);
Studentlist.add(dataSnapshot.child(sid.toString()).getKey().toString()+" "+CGA+" "+SPM+" "+DS+" "+EJ+" "+LSA); //add result into array list
}
//Toast.makeText(getApplicationContext(),Studentlist.toString(), Toast.LENGTH_LONG).show();
list(Studentlist);
}
@Override
public void onCancelled(DatabaseError databaseError) {
Toast.makeText(getApplicationContext(), "Something went wrong", Toast.LENGTH_LONG).show();
}
});
}
public void viewlist(View v){
Userlist.clear();
dbStudent = ref.child("Student");
dbStudent.orderByChild("classes").equalTo(class_name.getSelectedItem().toString()).addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
// Result will be holded Here
for (DataSnapshot dsp : dataSnapshot.getChildren()) {
Userlist.add(dsp.child("sid").getValue().toString()); //add result into array list
}
display_list(Userlist);
}
@Override
public void onCancelled(DatabaseError databaseError) {
Toast.makeText(getApplicationContext(), "something went wrong", Toast.LENGTH_LONG).show();
}
});
}
public void list(ArrayList studentlist){
//int color = Color.argb(255, 255, 175, 64);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, studentlist);
// Assign adapter to ListView
listView.setAdapter(adapter);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
finish();
}
return super.onOptionsItemSelected(item);
}
}
I cant figure out what might the problem or format of the code is wrong ?
