Mobile Development Articles - Page 58 of 156

This example demonstrates how do I set the color of a textView span in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.     Step 3 − Add the following code to src/MainActivity.javaimport android.graphics.Color; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.SpannableString; import android.text.Spanned; import android.text.style.ForegroundColorSpan; import android.widget.TextView; public class MainActivity extends AppCompatActivity {    TextView textView;    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);     ... Read More

CollectionView with TableView are two of many fundamental concept of iOS development, every developer should master both to be a good developer.In this post we will be focussing mainly on CollectionView, CollectionView is same as table view with some difference, Collection View supports both horizontal and vertical scrolling which looks like a grid. CollectionView in iOS is also referred to grid view in Android.To read more about it you can refer https://developer.apple.com/documentation/uikit/uicollectionviewAs you can see Collection View consists of Supplementary View and Cell, The collection view presents items onscreen using a cell, which is an instance of the UICollectionViewCell class ... Read More

Getting dimensions of a view is easy, In this post, we will see how one can get the dimensions of a view in iOS.Let’s get started, Step 1 − Open Xcode and create a single view application and name it SampleView.Step 2 − Open Main.storyboard and add UIView as shown below, Step 3 − Create @IBOutlet of the view in ViewController.swift.@IBOutlet var sampleView: UIView!Step 4 − In viewDidLoad of ViewController.swift write the following code, print(sampleView.frame.size)Run the application to see the size.Complete codeimport UIKit class ViewController: UIViewController {    @IBOutlet var sampleView: UIView!    override func viewDidLoad() {       ... Read More

As an iOS developer, you will come across multiple scenarios where you have to display something in web, for that we use WebView.As per Apple, − It is an object that displays interactive web content, such as for an in-app browser.So in this post, we will be seeing how to create WebView and load the data in it.So let’s startStep 1 − Open Xcode and create a single view application and name it WebViewSample.Step 2 − Open ViewController.swift file and import the WebKit module. import WebKitStep 3 − Add a property of WebKit in ViewController.swift.var webView: WKWebView!Step 4 − Add ... Read More

Getting a phone number of the iOS device is programmatically is not feasible. Apple doesn’t encourage it. You can get the phone number using private API’s but that will result in rejection of your application from the Apple App Store.As per the apple development guideline apps should be self-contained in their bundles, and may not read or write data outside the designated container area and device number is not available within your application’s container.As per Apple developer forum −Regardless of which programming language you use, Apple doesn't make the phone number associated with a device available to developers.Read More

This example demonstrates how remove a button or make it invisible in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.               Step 3 − Add the following code to src/MainActivity.javapackage com.example.sample; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.app.Activity; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends AppCompatActivity {    OnClickListener listener1=null;    OnClickListener listener2=null;    Button button1;    Button button2;    @Override    protected void onCreate(Bundle ... Read More

Changing font and color on UITextView is simple, you just need to update the .textColor and .font property on UITextView object, Here we will be seeing how to do so.So let’s get started, Open Main.storyboard and add UITextView as shown below, Create @IBOutlet of UITextView and name it, textView.    @IBOutlet var textView: UITextView!In your viewDidLoad method of ViewController.swift write below lines, textView.textColor = UIColor.cyan textView.font = UIFont(name: "Callout", size: 20)Final Code should look like, import UIKit class ViewController: UIViewController {    @IBOutlet var textView: UITextView!    override func viewDidLoad() {       super.viewDidLoad()       textView.textColor = ... Read More

Changing the background color of table view items is different from changing the background color of the table view. New programmers may often confuse between these two things, In this post, we will be seeing how to change the background color of TableView items i.e. cells.So let’s get started.For changing the background color of the table view cell, you should change the contentView.backgroundColor property of the cell.Add the below code in your cellForRowAt indexPath method, cell.contentView.backgroundColor = UIColor.cyanYour method should look like something below, func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {    let cell: UITableViewCell = tableView.dequeueReusableCell(withIdentifier: ... Read More

As per the Apple document – “Global variables are variables that are defined outside of any function, method, closure, or type contextBefore we learn how to create global variables, first let us understand completely what are they.Consider “W” which is inside the inner circle, can access everything which will be inside the inner circle. On the other hand, A can access everything which is inside the outer circle as well as everything inside the inner circle, so the scope of “A” is global as he can access both the circles.So a global variable can access everything inside the bigger and ... Read More

This example demonstrates how to create EditText with rounded corners in Android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.     Step 3 − Create a drawable resource file and Add the following code to drawable/et_style.xml         Step 4   − Add the following code to src/MainActivity.javapackage com.example.sample; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.EditText; public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {       ... Read More