package com.example.newcanaryproject
import android.Manifest
import android.app.Activity
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.database.Cursor
import android.net.Uri
import android.os.Build
import android.os.Bundle
import android.provider.ContactsContract
import android.telephony.SmsManager
import android.util.Log
import android.widget.Toast
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.annotation.RequiresApi
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.core.app.ActivityCompat
import androidx.core.app.ActivityCompat.startActivityForResult
import androidx.core.content.ContextCompat
import com.example.newcanaryproject.ui.theme.NewCanaryProjectTheme
import com.example.newcanaryproject.ui.theme.greenColor
class MainActivity : ComponentActivity() {
// on below line we are creating variable
// for contact name and contact number
var contactName by mutableStateOf("")
var contactNumber by mutableStateOf("")
@RequiresApi(Build.VERSION_CODES.M)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
NewCanaryProjectTheme {
// on below line we are specifying background color for our application
Surface(
// on below line we are specifying modifier and color for our app
modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background
) {
// on the below line we are specifying
// the theme as the scaffold.
Scaffold(
// in scaffold we are specifying the top bar.
topBar = {
// inside top bar we are specifying background color.
TopAppBar(backgroundColor = greenColor,
// along with that we are specifying
// title for our top bar.
title = {
// in the top bar we are specifying
// tile as a text
Text(
// on below line we are specifying
// text to display in top app bar.
text = "GFG",
// on below line we are specifying
// modifier to fill max width.
modifier = Modifier.fillMaxWidth(),
// on below line we are specifying
// text alignment.
textAlign = TextAlign.Center,
// on below line we are specifying
// color for our text.
color = Color.White
)
})
}) {
// on below line we are calling connection information
// method to display UI
contactPicker(
context = LocalContext.current, contactName, contactNumber
)
}
}
}
}
}
// on below line we are calling on activity result method.
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
// on below line we are checking if result code is ok or not.
if (resultCode != Activity.RESULT_OK) return
// on below line we are checking if data is not null.
if (requestCode === 1 && data != null) {
// on below line we are getting contact data
val contactData: Uri? = data.data
// on below line we are creating a cursor
val cursor: Cursor = managedQuery(contactData, null, null, null, null)
// on below line we are moving cursor.
cursor.moveToFirst()
// on below line we are getting our
// number and name from cursor
val number: String =
cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.CommonDataKinds.Phone.NUMBER))
val name: String =
cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME))
// on the below line we are setting values.
contactName = name
contactNumber = number
}
}
}
// on below line we are creating
// contact picker function.
@Composable
fun contactPicker(
context: Context,
contactName: String,
contactNumber: String,
) {
// on below line we are creating variable for activity.
val activity = LocalContext.current as Activity
// on below line we are creating a column,
Column(
// on below line we are adding a modifier to it,
modifier = Modifier
.fillMaxSize()
// on below line we are adding a padding.
.padding(all = 30.dp),
horizontalAlignment = Alignment.CenterHorizontally,
verticalArrangement = Arrangement.Center,
) {
// on below line we are adding a text for heading.
Text(
// on below line we are specifying text
text = "Contact in Android",
// on below line we are specifying
// text color, font size and font weight
color = greenColor, fontSize = 20.sp, fontWeight = FontWeight.Bold
)
// on below line adding a spacer
Spacer(modifier = Modifier.height(20.dp))
// on below line creating a text for contact name
Text(text = contactName, fontSize = 18.sp, fontWeight = FontWeight.Bold)
// on below line adding a spacer
Spacer(modifier = Modifier.height(20.dp))
// on below line creating a text for contact number.
Text(text = contactNumber, fontSize = 18.sp, fontWeight = FontWeight.Bold)
// on below line adding a spacer
Spacer(modifier = Modifier.height(20.dp))
// on below line creating a button to pick contact.
Button(
// on below line adding on click for button.
onClick = {
// on below line checking if permission is granted.
if (hasContactPermission(context)) {
// if permission granted open intent to pick contact/
val intent = Intent(Intent.ACTION_GET_CONTENT)
intent.type = ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE
startActivityForResult(activity, intent, 1, null)
} else {
// if permission not granted requesting permission .
requestContactPermission(context, activity)
}
},
// adding padding to button.
modifier = Modifier
.fillMaxWidth()
.padding(10.dp)
) {
// displaying text in our button.
Text(text = "Pick Contact")
}
}
}
fun hasContactPermission(context: Context): Boolean {
// on below line checking if permission is present or not.
return ContextCompat.checkSelfPermission(context, Manifest.permission.READ_CONTACTS) ==
PackageManager.PERMISSION_GRANTED;
}
fun requestContactPermission(context: Context, activity: Activity) {
// on below line if permission is not granted requesting permissions.
if (!hasContactPermission(context)) {
ActivityCompat.requestPermissions(activity, arrayOf(Manifest.permission.READ_CONTACTS), 1)
}
}