number = int(input("Which number do you want to check? "))
if number % 3 == 0 and number % 5 == 0:
print("This number is divisible by 3 and 5.")
elif number % 3 == 0 and number % 5 != 0:
print("This number is divisible by 3 but not 5.")
elif number % 3 != 0 and number % 5 == 0:
print("This number is divisible by 5 but not 3.")
else:
print("This number is not divisible by 3 or 5.")
To use the code you provided to increase the touch area of an ImageButton in an Android Activity, follow these steps:
1. Copy the provided `setupTouchDelegate` method and add it to your Activity class.
```java
public class YourActivity extends AppCompatActivity {
// Your existing code
public void setupTouchDelegate(View parentView, ImageButton btnImgBack) {
// The code you provided
}
}
```
2. In your Activity's `onCreate` method, find the parent view (e.g., RelativeLayout, LinearLayout, etc.) that contains the ImageButton you want to increase the touch area for.
```java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_activity_layout);
// Find the parent view
View parentView = findViewById(R.id.parent_view_id);
}
```
3. In the same `onCreate` method, find the ImageButton you want to increase the touch area for.
```java
// Find the ImageButton
ImageButton btnImgBack = findViewById(R.id.btn_img_back_id);
```
4. Call the `setupTouchDelegate` method with the parent view and ImageButton you found in steps 2 and 3.
```java
// Use the setupTouchDelegate method to increase the touch area
setupTouchDelegate(parentView, btnImgBack);
```
Here's the complete example:
```java
public class YourActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_activity_layout);
// Find the parent view
View parentView = findViewById(R.id.parent_view_id);
// Find the ImageButton
ImageButton btnImgBack = findViewById(R.id.btn_img_back_id);
// Use the setupTouchDelegate method to increase the touch area
setupTouchDelegate(parentView, btnImgBack);
}
public void setupTouchDelegate(View parentView, ImageButton btnImgBack) {
// The code you provided
}
}
```
Make sure to replace `YourActivity`, `your_activity_layout`, `parent_view_id`, and `btn_img_back_id` with the appropriate names for your Activity and views.
===================================================================
How to increase touch area in Activity Android java?
public void IncreaseTouchArea(View parentView, ImageButton btnImgBack) {
// Create a Rect object to store the desired touch area
final Rect touchArea = new Rect();
// Get the current touch area (bounds) of the button
btnImgBack.getHitRect(touchArea);
// Increase the touch area by the desired amount (e.g., 200dp)
int extraPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 200,getApplicationContext().getResources().getDisplayMetrics());
touchArea.top -= extraPadding;
touchArea.bottom += extraPadding;
touchArea.left -= extraPadding;
touchArea.right += extraPadding;
// Create a TouchDelegate and set it on the parent view
parentView.setTouchDelegate(new TouchDelegate(touchArea, btnImgBack));
}
===================================================================
The error message you are encountering, java.lang.RuntimeException: Can't create handler inside thread Thread[AsyncTask #5,5,main] that has not called Looper.prepare(), typically occurs when you try to update the UI from a background thread without using the proper mechanism.
In Android, UI updates should be performed on the main (UI) thread. In your case, it seems like you're trying to update the UI directly from the doInBackground method of an AsyncTask, which runs on a background thread.
To fix this issue, you should move the UI-related code to the onPostExecute method of the AsyncTask. This method is called on the main thread after the background processing is complete. Here's an example:
private class RFIDScanTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... voids) {
// Simulate RFID scanning logic
for (int i = 0; i < 10; i++) {
if (isCancelled()) {
// Break out of the loop if the task is cancelled
break;
}
// Perform RFID scanning here
// Simulate delay
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
// RFID scanning completed
isScanning = false;
// Update UI from the main thread
updateUIAfterScanning();
}
}
private void updateUIAfterScanning() {
runOnUiThread(new Runnable() {
@Override
public void run() {
// Update UI elements here
stopScanning();
}
});
}
In this example, I've introduced the updateUIAfterScanning method, which is called from the onPostExecute method. This method uses runOnUiThread to ensure that the UI updates are performed on the main thread.
Make sure to replace the stopScanning method call with the actual UI updates you want to perform after the RFID scanning is complete.
If you're not using an AsyncTask or have a different threading mechanism, the key is to ensure that any UI updates are done on the main (UI) thread.
Dependency
Injection (DI) is a software design pattern that promotes loosely coupled code
by allowing dependencies to be injected into a class from the outside, rather
than being created or managed within the class. In ASP.NET MVC 4, you can
implement DI using various DI containers such as Unity, Ninject, or Simple
Injector. Here, I'll provide an example using Unity for dependency injection.
Step 1: Create an ASP.NET MVC 4 Project If you haven't already, create a new
ASP.NET MVC 4 project in Visual Studio.
Step 2: Install Unity Container You need to install the Unity NuGet
package to your project. Open the Package Manager Console and run:
Install-Package Unity.Mvc4
Step 3:
Create a Dependency
Let's assume you have a service that you want to inject into your controller.
First, create an interface and a class for this service:
-----------------------------------------------------------------------------------------------------------------------------
// IService.cs
public interface IService
{
string GetData();
}
// Service.cs
public class Service : IService
{
public string GetData()
{
return "Hello from Service!";
}
}
Step 4:
Configure Dependency Injection In your Global.asax.cs file, configure Unity
to manage the dependencies. Add the following code to the Application_Start
method:
-----------------------------------------------------------------------------------------------------------------------------
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
// Configure Unity Container
var container = new UnityContainer();
container.RegisterType<IService, Service>();
// Set the Unity DependencyResolver
DependencyResolver.SetResolver(new UnityDependencyResolver(container));
}
This code
sets up the Unity container and tells it that when someone asks for an IService,
it should provide an instance of the Service class.
Step 5: Inject the Dependency Now, you can inject the dependency
into your controller. Here's an example:
-----------------------------------------------------------------------------------------------------------------------------
public class HomeController : Controller
{
private readonly IService _service;
// Constructor injection
public HomeController(IService service)
{
_service = service;
}
public ActionResult Index()
{
string data = _service.GetData();
return View(data);
}
}
By
using constructor injection, the IService
is automatically injected when an instance of HomeController is created.
Step
6: Use the Dependency in a View In your view (Index.cshtml), you can display
the data from the injected service:
-----------------------------------------------------------------------------------------------------------------------------
@model string
<!DOCTYPE html>
<html>
<head>
<title>Dependency Injection Example</title>
</head>
<body>
<h1>@Model</h1>
</body>
</html>
When
you run the application, the text from the Service will be displayed on the Index page.
This is a basic example of implementing Dependency
Injection in ASP.NET MVC 4 using the Unity container. It promotes better
separation of concerns and testability by allowing you to easily switch out
dependencies and mock them during unit testing.
To make any application accessible to the end-user, we need to host it on a server. So, in this article, we will learn how to host ASP.NET Web API REST Service in IIS 10. The following steps are required to host any application.
I hope, you have learned how to create and publish ASP.NET Web API REST Service. Now, let's start hosting Web API REST Service in IIS 10.
Here's a handy way to determine if a reader is connected to the network or not. It uses the .NET Ping and PingOptions classes, so make sure to add the following namespace to your project.
using System.Net.NetworkInformation;
//Then, you can write a method like this, that returns true if the reader is connected and false if it is not.
private bool ReaderIsAvailable(string address)
{
Ping pingSender = new Ping();
PingOptions options = new PingOptions();
options.DontFragment = true;
string data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
byte[] buffer = Encoding.ASCII.GetBytes(data);
int timeout = 120;
PingReply reply = pingSender.Send(address, timeout, buffer, options);
if (reply.Status == IPStatus.Success)
return true;
else
return false;
}
Finally, this is how you would call the method.
if (ReaderIsAvailable("SpeedwayR-10-25-32"))
{
// Reader is connected to the network.
// Start reading some tags!
}
else
{
// Reader is not connected to the network.
// Handle it here.
}
I have such a problem – I want to make spinner's scrollbar always visible.
But for spinner function
setScrollbarFadingEnabled(false);
causes crash with a NullExceptionPointer during drawing the GUI.
XML tags can't solve this problem too – it seems that spinner just ignore them.
Maybe there are another ways to move? For example, using of the custom scrollbar? If yes, how can I do this?
---------------------------------------------------------------------------------------------------------------
As I've been asked, here is LogCat error message for simple project with just a spinner in it:
AndroidRuntime(2252): FATAL EXCEPTION: main
AndroidRuntime(2252): java.lang.NullPointerException
AndroidRuntime(2252): at android.view.View.onDrawScrollBars(View.java:5836)
AndroidRuntime(2252): at android.view.View.draw(View.java:6799)
AndroidRuntime(2252): at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
AndroidRuntime(2252): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
AndroidRuntime(2252): at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
AndroidRuntime(2252): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
AndroidRuntime(2252): at android.view.View.draw(View.java:6796)
AndroidRuntime(2252): at android.widget.FrameLayout.draw(FrameLayout.java:352)
AndroidRuntime(2252): at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
AndroidRuntime(2252): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
AndroidRuntime(2252): at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
AndroidRuntime(2252): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
AndroidRuntime(2252): at android.view.View.draw(View.java:6796)
AndroidRuntime(2252): at android.widget.FrameLayout.draw(FrameLayout.java:352)
AndroidRuntime(2252): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2078)
AndroidRuntime(2252): at android.view.ViewRoot.draw(ViewRoot.java:1433)
AndroidRuntime(2252): at android.view.ViewRoot.performTraversals(ViewRoot.java:1175)
AndroidRuntime(2252): at android.view.ViewRoot.handleMessage(ViewRoot.java:1753)
AndroidRuntime(2252): at android.os.Handler.dispatchMessage(Handler.java:99)
AndroidRuntime(2252): at android.os.Looper.loop(Looper.java:123)
AndroidRuntime(2252): at android.app.ActivityThread.main(ActivityThread.java:4632)
AndroidRuntime(2252): at java.lang.reflect.Method.invokeNative(Native Method)
AndroidRuntime(2252): at java.lang.reflect.Method.invoke(Method.java:521)
AndroidRuntime(2252): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
AndroidRuntime(2252): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
AndroidRuntime(2252): at dalvik.system.NativeStart.main(Native Method)
Best Solution
Spinner does not have a scrollbar, Hence you are getting NullPointerException.
The popup shown by spinner has a scrollbar. So you need to change the properties of the ListView shown by spinner. But ListView itself is not exposed by Spinner by any public methods.
Even if you get the ListPopupWindow by reflection, a further problem arises, that ListPopupWindow's ListView is only created after you click the Spinner.
But OnClickListener of the Spinner cannot be registered , to set the ListView Properties after the show.
You could create a Custom Spinner with performClick overridden and then get mPopup by reflection. and use
mPopup.getListView().setScrollbarFadingEnabled(false)But If you are going to create a custom Spinner, i believe it is easier to implement the whole popup to