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POAndroid Temperature Vogella tutorial error
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  1. POAndroid Temperature Vogella tutorial error
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    copied!<p>I'm using the vogella tutorial, and I'm almost followed the instructions exactly, but it is sort of giving me an error on text and radiobutton saying it cannot be resolved or it is not in field. I'm really new to Android. Would you please help me out with the code.</p> <pre><code>package convert.activity; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.EditText; import android.widget.RadioButton; import android.widget.Toast; public class MainActivity extends Activity { private EditText text; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); text = (EditText) findViewById(R.id.editText1); } // This method is called at button click because we assigned the name to the // "On Click property" of the button public void myClickHandler(View view) { switch (view.getId()) { case R.id.button1: RadioButton celsiusButton = (RadioButton) findViewById(R.id.radio0); RadioButton fahrenheitButton = (RadioButton) findViewById(R.id.radio1); if (text.getText().length() == 0) { Toast.makeText(this, "Please enter a valid number", Toast.LENGTH_LONG).show(); return; } float inputValue = Float.parseFloat(text.getText().toString()); if (celsiusButton.isChecked()) { text.setText(String .valueOf(convertFahrenheitToCelsius(inputValue))); celsiusButton.setChecked(false); fahrenheitButton.setChecked(true); } else { text.setText(String .valueOf(convertCelsiusToFahrenheit(inputValue))); fahrenheitButton.setChecked(false); celsiusButton.setChecked(true); } break; } } // Converts to celsius private float convertFahrenheitToCelsius(float fahrenheit) { return ((fahrenheit - 32) * 5 / 9); } // Converts to fahrenheit private float convertCelsiusToFahrenheit(float celsius) { return ((celsius * 9) / 5) + 32; } } </code></pre> <p>Here is my code to activity_main.xml</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/myColor" &gt; &lt;EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:ems="10" android:inputType="numberSigned|numberDecimal" &gt; &lt;requestFocus /&gt; &lt;/EditText&gt; &lt;RadioGroup android:id="@+id/radioGroup1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/editText1" &gt; &lt;RadioButton android:id="@+id/radio0" android:layout_width="wrap_content" android:layout_height="wrap_content" android:checked="true" android:text="@string/celsius" /&gt; &lt;RadioButton android:id="@+id/radio1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/fahrenheit" /&gt; &lt;/RadioGroup&gt; &lt;Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/calc" android:onClick="myClickHandler"&gt; &lt;/Button&gt; &lt;/RelativeLayout&gt; </code></pre> <p>The error is on editText1, radio0, radio1 and button1... For all them the error is the same,i.e it cannot be resolved or is not in a field.</p>
 

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