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TeacherActivity.java
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darshanxyz authoreddarshanxyz authored
TeacherActivity.java 5.06 KiB
package com.darshanbshah.odsystem;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.ChildEventListener;
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;
import java.util.HashMap;
import java.util.List;
public class TeacherActivity extends AppCompatActivity {
FirebaseAuth mAuth;
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference root;
DatabaseReference od;
DatabaseReference adv;
DatabaseReference student;
List<String> uid_list = new ArrayList<String>();
HashMap<String, String> uid_map = new HashMap<String, String>();
ListView listView;
CustomListAdapter adapter;
String adv_name;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_teacher);
mAuth = FirebaseAuth.getInstance();
root = database.getReference();
od = root.child("OD");
adv = root.child("Advisors");
student = root.child("Student");
listView = (ListView)findViewById(R.id.listView);
adv.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
for (DataSnapshot data : dataSnapshot.getChildren()) {
if (mAuth.getCurrentUser().getEmail().equals(data.getValue().toString())) {
Log.e("DATA_KEY", dataSnapshot.getKey());
adv_name = dataSnapshot.getKey();
}
}
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
od.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
if (dataSnapshot.getKey().equals(adv_name)) {
Log.e("SNAP", dataSnapshot.getKey());
for (DataSnapshot data : dataSnapshot.getChildren()) {
Log.e("OD_LIST", data.getKey() + " " + data.getValue());
uid_map.put(data.getKey(), data.getValue().toString());
uid_list.add(data.getKey());
}
}
adapter = new CustomListAdapter(getApplicationContext(), R.layout.list_item);
listView.setAdapter(adapter);
Log.e("UIDLIST_SIZE", String.valueOf(uid_list.size()));
for (String value: uid_list) {
DataProvider provider = new DataProvider(value);
adapter.add(provider);
}
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
student.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
// for(DataSnapshot dsp : dataSnapshot.getChildren()){
// if (uid_list.contains(dataSnapshot.getKey())) {
// if (dsp.getKey().toString().equals("RollNumber")) {
// t.setText(dsp.getValue().toString());
// }
// }
// }
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
public void signOut(View view) {
mAuth.signOut();
startActivity(new Intent(this, Login.class));
finish();
}
}