/*****main acitvity******/
package com.digipodium.cloud_demo;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        Button btnLogin=findViewById(R.id.btnlogin);
        TextView reg=findViewById(R.id.reg);
        final EditText id_pass = findViewById(R.id.id_pass);
        final EditText id_email=findViewById(R.id.id_email);
        final TextView tvError=findViewById(R.id.tvError);
        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email=id_email.getText().toString();
                String pass=id_pass.getText().toString();
                if(!email.isEmpty()&&email.contains("@")&&email.contains(".com")&&!pass.isEmpty()&&pass.length()>7)
                {
                    FirebaseAuth fbase=FirebaseAuth.getInstance();
                    fbase.signInWithEmailAndPassword(email,pass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if(task.getException()==null) {
                                FirebaseUser user = task.getResult().getUser();
                                updateUI(user);
                            }
                            else{try{
                                String error=task.getException().getMessage();
                                tvError.setText(error);
                                updateUI(null);
                                }
                                catch(Exception e)
                                {
                                    Toast.makeText(MainActivity.this, "ssss", Toast.LENGTH_SHORT).show();
                                }}
                        }
                    });
                }
                else
                {
                    tvError.setText("please enter valid email and password");
                }
            }
        });




        reg.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(MainActivity.this,register.class));

            }
        });


        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
    }

    private void updateUI(FirebaseUser user) {
        //if user object is not null,use intend to take him to main activity
        //else do nothing
        if(user!=null)
        {
            startActivity(new Intent(this,HomeActivity.class));
            finish();//kill this activity
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
        FirebaseUser user =FirebaseAuth.getInstance().getCurrentUser();
        updateUI(user);
    }

    @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);
    }
}
/******************add activity************/
package com.digipodium.cloud_demo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

public class AddActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add);
         Button btnadd=findViewById(R.id.btnadd);
        final EditText etquote=findViewById(R.id.etquote);
        FirebaseDatabase db=FirebaseDatabase.getInstance();
        final DatabaseReference dref=db.getReference("quotes");
        btnadd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String myQuote=etquote.getText().toString();
                if(myQuote.isEmpty())
                {
                    etquote.setError("Field cannot be empty");
                }
                else
                {
                    Quote q=new Quote(
                            myQuote,
                            "annonymous",
                            System.currentTimeMillis()//
                    );
                    dref.push().setValue(q).addOnSuccessListener(new OnSuccessListener<Void>() {
                        @Override
                        public void onSuccess(Void aVoid) {
                            etquote.setText("");
                        }
                    });

                }
            }
        });

    }
}
//////********************home activity*********/
package com.digipodium.cloud_demo;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;
import android.view.MenuItem;
import android.widget.TextView;

public class HomeActivity extends AppCompatActivity {

    //private TextView mTextMessage;


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

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            switch (item.getItemId()) {
                case R.id.navigation_home:
                    //faltu
                    //mTextMessage.setText(R.string.title_home);
                    return true;
                case R.id.navigation_add:
                    startActivity(new Intent(HomeActivity.this,AddActivity.class));
                    //mTextMessage.setText(R.string.title_dashboard);
                    return true;
            }
            return false;
        }
    };

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

        //mTextMessage = (TextView) findViewById(R.id.message);
        BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
        RecyclerView rvquotes=findViewById(R.id.RecyclerView);
    }

}
///////////*quote*******/
package com.digipodium.cloud_demo;

public class Quote
{
    String text;
    String user;
    long timestamp;

    public Quote() {//firebase k liye
    }

    public Quote(String text, String user, long timestamp) {//ctrl+shify+-
        this.text = text;
        this.user = user;
        this.timestamp = timestamp;
    }

    public void setText(String text) {
        this.text = text;
    }

    public void setUser(String user) {
        this.user = user;
    }

    public void setTimestamp(long timestamp) {
        this.timestamp = timestamp;
    }
}
/////*register********/
package com.digipodium.cloud_demo;

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.design.widget.TextInputEditText;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class register extends AppCompatActivity {

    private EditText psswd;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        final EditText email2 = findViewById(R.id.email2);
        psswd = findViewById(R.id.psswd);
        final TextInputEditText usrnme = findViewById(R.id.usrnme);
        Button regist = findViewById(R.id.regist);
        final TextView txtError = findViewById(R.id.txtError);
        regist.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = email2.getText().toString();
                String pass = psswd.getText().toString();
                String username = usrnme.getText().toString();
                if (!email.isEmpty() && email.contains("@") && email.contains(".com") && !pass.isEmpty() && pass.length() > 7) {
                    FirebaseAuth fbase = FirebaseAuth.getInstance();
                    fbase.createUserWithEmailAndPassword(email, pass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if (task.getException() == null) {
                                FirebaseUser user = task.getResult().getUser();
                                updateUI(user);
                            } else {
                                try {
                                    String error = task.getException().getMessage();
                                    txtError.setText(error);
                                    updateUI(null);
                                }
                                catch (Exception e) {

                                }
                            }
                        }
                    });
                } else {
                    txtError.setText("please enter valid email and password");
                }
            }
        });

    }

    private void updateUI(FirebaseUser user) {
        if(user!=null)
        {
            startActivity(new Intent(this,HomeActivity.class));
            finish();//kill this activity
        }

    }
    @Override
    protected void onStart() {
        super.onStart();
        FirebaseUser user =FirebaseAuth.getInstance().getCurrentUser();
        updateUI(user);
    }

}

//*********activity_add.xml*******/
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".AddActivity">

    <TextView
        android:id="@+id/tvtxt"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="16dp"
        android:text="Enter a Quote here"
        android:textSize="30sp"
        android:textStyle="bold|italic"
        app:layout_constraintBottom_toTopOf="@+id/etquote"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/etquote"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="68dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:background="#0000"
        android:ems="10"
        android:gravity="top"
        android:hint="write anything ...."
        android:inputType="textMultiLine"
        android:lines="6"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@+id/btnadd"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tvtxt" />

    <Button
        android:id="@+id/btnadd"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="93dp"
        android:layout_marginStart="131dp"
        android:text="Add Quote"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/etquote" />
</android.support.constraint.ConstraintLayout>
/***********activity_home**********/
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HomeActivity">

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="0dp"
        android:layout_marginStart="0dp"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/navigation" />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/RecyclerView"
        android:layout_width="368dp"
        android:layout_height="439dp"
        tools:layout_editor_absoluteX="8dp"
        tools:layout_editor_absoluteY="8dp" />

</android.support.constraint.ConstraintLayout>



/********activity_main********/
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>
/*****activity_register******/
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".register">

    <android.support.design.widget.TextInputLayout
        android:id="@+id/textInputLayout"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="40dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/psswd">

        <android.support.design.widget.TextInputEditText
            android:id="@+id/usrnme"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Username" />
    </android.support.design.widget.TextInputLayout>

    <Button
        android:id="@+id/regist"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="116dp"
        android:layout_marginTop="65dp"
        android:text="Register"
        app:layout_constraintStart_toStartOf="@+id/textInputLayout"
        app:layout_constraintTop_toBottomOf="@+id/textInputLayout" />

    <EditText
        android:id="@+id/psswd"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="110dp"
        android:ems="10"
        android:hint="Password"
        android:inputType="textPassword"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/email2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="199dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="20dp"
        android:ems="10"
        android:hint="email"
        android:inputType="textEmailAddress"
        app:layout_constraintBottom_toTopOf="@+id/txtError"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/txtError"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="218dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/email2" />
</android.support.constraint.ConstraintLayout>
/********content_main.xml****/
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".MainActivity"
    tools:showIn="@layout/activity_main">

    <Button
        android:id="@+id/btnlogin"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="47dp"
        android:layout_marginStart="16dp"
        android:text="Login"
        app:layout_constraintBaseline_toBaselineOf="@+id/reg"
        app:layout_constraintEnd_toStartOf="@+id/reg"
        app:layout_constraintStart_toStartOf="parent" />

    <TextView
        android:id="@+id/reg"
        android:layout_width="0dp"
        android:layout_height="43dp"
        android:layout_marginEnd="70dp"
        android:text="Register"
        android:textSize="24sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/btnlogin"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/id_email"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="117dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="16dp"
        android:ems="10"
        android:hint="email"
        android:inputType="textEmailAddress"
        app:layout_constraintBottom_toTopOf="@+id/tvError"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/id_pass"
        android:layout_width="0dp"
        android:layout_height="56dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="56dp"
        android:ems="10"
        android:hint="Password"
        android:inputType="textPassword"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/id_email" />

    <TextView
        android:id="@+id/tvError"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="288dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/id_email" />

</android.support.constraint.ConstraintLayout>