Android BroadcastReceiver onReceive Update TextView in MainActivity

Question

In MainActivity I have a TextView: textV1. I also have a method in MainActivity that updates that textview:

public void updateTheTextView(final String t) {
         


        

Answer 1

If someone is searching this exact solution, but in Kotlin, do the following:

class MainActivity : AppCompatActivity() {

    companion object {
        var ins: MainActivity? = null
        fun getInstance(): MainActivity? {
            return ins
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        ins = this
    }

    fun updateTheTextView(t: String) {
        this@MainActivity.runOnUiThread {
            val textV1 = findViewById(R.id.textV1)
            textV1.text = t
        }
    }
}

class NotifAlarm : BroadcastReceiver() {
    override fun onReceive(context: Context?, intent: Intent?) {
        try {
            MainActivity.getInstance()?.updateTheTextView("The String")
        } catch (e: Exception) {

        }
    }
}