CODEWITHSUNDEEP
androidkotlinsdkonbackpressed
AI Shakil
AI Shakil

Reputation: 1732

Android Kotlin - onBackPressedDispatcher.onBackPressed() will finish my activity?

When onBackPressed() not working in recent sdk, we have to use the new method onBackPressedDispatcher.onBackPressed().

But my question is

will it finish my activity?

Or, I have to callback the onBackPressedDispatcher.onBackPressed() to finish my activity?

Button code is :

button.setOnClickListener {
    onBackPressedDispatcher.onBackPressed()
}

CallBack Code:

onBackPressedDispatcher.addCallback(this, object: OnBackPressedCallback(true) {
    override fun handleOnBackPressed() {
        finish()
    }
})

Upvotes: 1

Views: 10851

Answers (1)

AI Shakil
AI Shakil

Reputation: 1732

The answer is :

onBackPressedDispatcher.onBackPressed() will finish my activity

Luckily onBackPressedDispatcher.onBackPressed() have destroyed my activity. I don't need to callback the OnBackPressedCallback object to finish() my activity.

Here is the checking code:

override fun onCreate(savedInstanceState: Bundle?) {
    ...
    ...

    btnBack?.setOnClickListener { onBackPressedDispatcher.onBackPressed() }

    //onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
        //override fun handleOnBackPressed() {
            //finish() // No Longer Needs to Callback and Finish
        //}
    //})

}


override fun isFinishing(): Boolean {
    println("Finishing")
    return super.isFinishing()
}

override fun onDestroy() {
    super.onDestroy()
    println("Destroyed & Finished")
}

Upvotes: 4

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