package com.minich.buttondemo; import android.app.Activity; import android.os.Bundle; import android.widget.EditText; import android.widget.TextView; import android.widget.Button; import android.view.View; import android.widget.ImageView; public class MainActivity extends Activity { private EditText etFahrenheit; private TextView tvCelsius; private Button btnCompute; private Button btnReset; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ImageView image = (ImageView) findViewById(R.id.image); image.setImageResource(R.drawable.image); etFahrenheit = (EditText) findViewById(R.id.etFahrenheit); tvCelsius = (TextView) findViewById(R.id.tvCelsius); btnCompute = (Button) findViewById(R.id.btnCompute); btnReset = (Button) findViewById(R.id.btnReset); btnCompute.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { calculate(); } }); btnReset.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { reset(); } }); }// end of onCreate method private void calculate() { double degreesFahrenheit = Double.parseDouble(etFahrenheit.getText().toString()); double degreesCelsius = (degreesFahrenheit - 32) * 5./9.; tvCelsius.setText(Double.toString(degreesCelsius)); } private void reset() { etFahrenheit.setText(""); tvCelsius.setText(""); } }// end of MainActivity class