package com.example.twonumbercalculate ; import android.support.v7.app.AppCompatActivity ; import android.os.Bundle ; import android.view.View ; import android.widget.Button ; import android.widget.EditText ; import android.widget.TextView ; import android.widget.Toast ; public class MainActivity extends AppCompatActivity { EditText n1 , n2 ; TextView textView ; Button button2 ; @Override protected void onCreate ( Bundle savedInstanceState ) { super . onCreate ( savedInstanceState ); setContentView ( R . layout . activity_main ); textView = findViewById ( R . id . textView ); button2 = findViewById ( R . id . button2 ); n1 = findViewById ( R . id . n1 ); n2 = findViewById ( R . id . n2 ); button2 . setOnClickListener ( new View . OnClickListener () { @Override public void onClick ( View v ) { int sum = Integer . parseInt ( n1 . getText (). toString ()) + Integer . p...
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