How to Achieve Asynchronous Method Invocation with a Delay in Android?

Async Method Invocation in Android

In Android, a common requirement is to call a method after a specific delay. In Objective-C, this can be achieved using the performSelector method. This article provides Java equivalents for this functionality in Android, enabling developers to schedule method invocations for later execution.

The following code block demonstrates how to call the method DoSomething after a delay of 5 seconds:

Kotlin:

Handler(Looper.getMainLooper()).postDelayed({
    // Do something here
}, 5000)

Java:

final Handler handler = new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        // Do something here
    }
}, 5000);

In both cases, the Handler class is responsible for scheduling the method invocation. The postDelayed method takes two parameters: a Runnable object that encapsulates the code to be executed, and a delay in milliseconds.

When the specified delay elapses, the Runnable's run method is invoked on the main thread. This allows developers to perform asynchronous operations without blocking the main UI thread.

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