1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | package com.example.programmingknowledge.thefirstapp;
import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.EditText; import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
}
public void onButtonClick(View v) { EditText e1 = (EditText)findViewById(R.id.editText); EditText e2 = (EditText)findViewById(R.id.editText2); TextView t1 = (TextView)findViewById(R.id.textView); int num1 = Integer.parseInt(e1.getText().toString()); int num2 = Integer.parseInt(e2.getText().toString()); int sum = num1 + num2 ; t1.setText(Integer.toString(sum)); }
@Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; }
@Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId();
//noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; }
return super.onOptionsItemSelected(item); } }
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