harshavardhan98

// assigning an onclick listener to a button

// declare a Button b1 above outside the onCreate

// assigns a button with id 'btn1' in the xml layout file to the variable b1
b1=findViewById(R.id.btn1);

// assigning an onClickListener to the Button b1
b1.setOnClickListener(new View.OnClickListener() {
    @Override

harshavardhan98

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import java.util.ArrayList;

public class adapter_name extends ArrayAdapter<class_name> {

harshavardhan98

//source:
//https://www.concretepage.com/android/android-alarm-clock-tutorial-to-schedule-and-cancel-alarmmanager-pendingintent-and-wakefulbroadcastreceiver-example

// permissions - add this in the manifest file
// <uses-permission android:name="android.permission.WAKE_LOCK"/>
//<receiver android:name=".AlarmReceiver"/> - add this to the manifest file 

alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Intent myIntent = new Intent(MainActivity.this, AlarmReceiver.class);
pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent, 0);

harshavardhan98

lex programs repo - https://github.com/VandanaBaidya/Lex-Programs 
https://github.com/3ZadeSSG/Lex-Yacc-Basics/blob/master/Problem%20Statements%20Scanned%20Copy.pdf

harshavardhan98

Setting up a callback interface when querying the DB:
https://stackoverflow.com/questions/42121771/handle-data-returned-by-an-async-task-firebase?rq=1 

harshavardhan98

//https://stackoverflow.com/a/39100135/10664312

int bs_upper_bound(int a[], int n, int x) {
    int l = 0;
    int h = n; // Not n - 1
    while (l < h) {
        int mid = (l + h) / 2;
        if (x >= a[mid]) {
            l = mid + 1;
        } else {

harshavardhan98

 <TableLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        
        <TableRow
            android:padding="20dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <TextView
                android:text="hellp"

harshavardhan98

public class Contact {

    String name;
    String message;
    String dpUrl;
    String time;

    public Contact(String name, String message, String dpUrl, String time) {
        this.name = name;
        this.message = message;

harshavardhan98

    public void BSNL(String phoneNo,Callback cb) {
        OkHttpClient okHttpClient = new OkHttpClient();

        String url="https://portal2.bsnl.in/myportal/validatemobile.do";
        String referer_url = "https://portal2.bsnl.in/myportal/authorize.do";

        MediaType parse = MediaType.parse("application/x-www-form-urlencoded");

        okHttpClient.newCall(new Request.Builder().url(url)
                .post(RequestBody.create(parse,"mobile=" + phoneNo))

harshavardhan98

implementation 'com.google.firebase:firebase-auth:19.0.0'
implementation 'com.google.android.gms:play-services-auth:17.0.0'

public void initGoogleSignIn() {
    mAuth = FirebaseAuth.getInstance();
    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestIdToken(getString(R.string.default_web_client_id)).requestEmail().build();
    GoogleSignInClient mGoogleSignInClient = GoogleSignIn.getClient(fb.this, gso);

    Intent signInIntent = mGoogleSignInClient.getSignInIntent();
    startActivityForResult(signInIntent, 111);