Change TextView text

Question

I\'m trying to change my TextView text from the code.

This is what my xml looks like:

XML:


        

Answer 1

Your approach is incorrect. I think it will be Null Pointer Exception (next time post log cat)

You need to specify the layout you are using first, before finding views.

Java:

// Specify the layout you are using.
setContentView(R.layout.yourlayout);

// Load and use views afterwards
TextView tv1 = (TextView)findViewById(R.id.textView1);
tv1.setText("Hello");

Kotlin:

// Specify the layout you are using.
setContentView(R.layout.yourlayout)

// Load and use views afterwards
val tv1: TextView = findViewById(R.id.textView1)
tv1.text = "Hello"

Click Here to study exactly you want to know

Answer 2

remove this.. setContentView(tv1);