for a demo purpose i want to move to home_nav avtivity after clicking on a text

gistfile1.txt

package com.example.nabeel.ask;

import com.bumptech.glide.Glide;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.appevents.AppEventsLogger;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.Result;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class signin extends AppCompatActivity implements View.OnClickListener, GoogleApiClient.OnConnectionFailedListener {

    Intent i;

    private LinearLayout Prof_Section;
    private LoginButton loginButton;
    private CallbackManager callbackManager;
    private Button SignOut;
    private TextView Name , Email;
    private SignInButton SignIn;

    private GoogleApiClient googleApiClient;
    private static final int REQ_CODE = 9001;


    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        FacebookSdk.sdkInitialize(getApplicationContext());

        setContentView(R.layout.activity_signin);


        Prof_Section = (LinearLayout)findViewById(R.id.prof_section);
        SignOut = (Button)findViewById(R.id.bn_logout);
        Name = (TextView)findViewById(R.id.name);
        Email = (TextView)findViewById(R.id.email);
        SignIn = (SignInButton)findViewById(R.id.bn_login);



        SignIn.setOnClickListener(this);
        SignOut.setOnClickListener(this);
        Prof_Section.setVisibility(View.GONE);
        GoogleSignInOptions signInOptions = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestEmail().build();
        googleApiClient = new GoogleApiClient.Builder(this).enableAutoManage(this,this).addApi(Auth.GOOGLE_SIGN_IN_API,signInOptions).build();








        loginButton = (LoginButton)findViewById(R.id.login_button);
        callbackManager = CallbackManager.Factory.create();
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {

                i = new Intent(signin.this , home.class);
                startActivity(i);
            }

            @Override
            public void onCancel() {

            }

            @Override
            public void onError(FacebookException error) {

            }
        });
        TextView tv_su = (TextView) findViewById(R.id.signup);
        tv_su.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent(signin.this, signup.class);
                startActivity(i);
            }
        });

        TextView tv_si = (TextView) findViewById(R.id.login);
        tv_si.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent si = new Intent(signin.this, home_nav.class);
                startActivity(si);
            }
        });



    }



    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == REQ_CODE) {
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            handleresult(result);
        }
        else {
            callbackManager.onActivityResult(requestCode, resultCode, data);
        }    }

    @Override
    public void onClick(View v) {

        switch (v.getId()){
            case R.id.bn_login:
                signIn();
                break;
            case R.id.bn_logout:
                signOut();
                break;
        }
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }
    private void signIn(){

        Intent intent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
        startActivityForResult(intent,REQ_CODE);

    }
    private void signOut(){
        Auth.GoogleSignInApi.signOut(googleApiClient).setResultCallback(new ResultCallback<Status>() {
            @Override
            public void onResult(@NonNull Status status) {
                updateUI(false);
            }
        });
    }


    private void handleresult(GoogleSignInResult result){

        if(result.isSuccess()){
            i = new Intent(signin.this , home.class);
            startActivity(i);

            GoogleSignInAccount account = result.getSignInAccount();
            String name = account.getDisplayName();
            String email = account.getEmail();
            Name.setText(name);
            Email.setText(email);

            updateUI(true);

        }
        else
            updateUI(false);
    }

    private void updateUI(boolean isLogin){
        if(isLogin){
            Prof_Section.setVisibility(View.VISIBLE);
            SignIn.setVisibility(View.GONE);

        }
        else{
            Prof_Section.setVisibility(View.GONE);
            SignIn.setVisibility(View.VISIBLE);
        }

    }




}