onButtonClick

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public void onButtonClick(View v) { EditText ei = (EditText)findViewById(R.id.editText); EditText e2 = (EditText)findViewById(R.id.editText2); TextView t1 = (TextView)findViewById(R.id.textView); int a =Integer.parseInt(ei.getText().toString()); int b =Integer.parseInt(e2.getText().toString()); int sum = a+b; t1.setText(Integer.toString(sum)); }