How to hide the activity in background without killing it?-CodePudding

I have a MainActivity and an Activity2. When I press a button on MainActivity, it starts the activity2 and on activity2 I have a button which when pressed i want to return to MainActivity without killing Activity2/releasing its resources(or hide the activity in background if possible). The button to launch activity2 is already achieved, but I don't know how can I hide the Activity2 on button press.

CodePudding user response：

Make your MainActivity launchmode to singleInstance in manifest

  <activity
        android:name=".MainActivity"
        android:exported="false"
        android:launchMode="singleInstance"/>

when clicking on button on Activity2 launch the MainActivity again

findViewById<Button>(R.id.button).setOnClickListener {
        val intent = Intent(this,MainActivity::class.java)
        startActivity(intent)
    }

CodePudding user response：

You can probably launch an intent that shows the home screen but not finish the Activity2

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