package com.example.helloespressotesting;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tv = (TextView) findViewById(R.id.tvTarget);
EditText et = (EditText) findViewById(R.id.tf);
Button b = (Button) findViewById(R.id.startButton);
b.setOnClickListener(v -> {
tv.setText(et.getText());
});
}
}