title: Android App Crashes on Button Click
body: <p>I have been attempting to make my first android application (a simple temperature converter) in Eclipse, but when I click the button on my phone the app crashes. Here is the full java code</p>
  
  <pre><code>package com.example.myfirstapp;
  
  import android.os.Bundle;
  import android.app.Activity;
  import android.view.Menu;
  import android.view.View;
  import android.view.Window;
  import android.widget.EditText;
  import android.widget.RadioButton;
  import android.widget.TextView;
  public class MainActivity extends Activity {
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      getMenuInflater().inflate(R.menu.main, menu);
      return true;
  }
  String number;
  int number2;
  int output;
  boolean F;
  public void onBtnClicked(View view){
  
      EditText mEdit = (EditText)findViewById(R.id.editText1);
      TextView myTextView = (TextView) findViewById(R.id.label);
  
  number = mEdit.getText().toString();
  number2 = Integer.parseInt(number);
  
  if(F=true){
  output=number2*9/5+32;
  }
  else{
  output=number2-32*5/9;
  }
  
  myTextView.setText(output);
  } 
  
  public void onRadioButtonClicked(View view) {
  
      boolean checked = ((RadioButton) view).isChecked();
  
      switch(view.getId()) {
          case R.id.radio0:
              if (checked)
                  F = true;
              break;
          case R.id.radio1:
              if (checked)
                  F = false;
              break;
      }
  }
  }
  </code></pre>
  
  <p>LogCat when the button is clicked</p>
  
  <pre><code>04-13 20:19:50.423: E/AndroidRuntime(25200): FATAL EXCEPTION: main
  04-13 20:19:50.423: E/AndroidRuntime(25200): java.lang.IllegalStateException: Could not execute method of the activity
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.view.View$1.onClick(View.java:3674)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.view.View.performClick(View.java:4198)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.view.View$PerformClick.run(View.java:17158)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.os.Handler.handleCallback(Handler.java:615)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.os.Handler.dispatchMessage(Handler.java:92)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.os.Looper.loop(Looper.java:137)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.app.ActivityThread.main(ActivityThread.java:4918)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at java.lang.reflect.Method.invokeNative(Native Method)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at java.lang.reflect.Method.invoke(Method.java:511)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at dalvik.system.NativeStart.main(Native Method)
  04-13 20:19:50.423: E/AndroidRuntime(25200): Caused by: java.lang.reflect.InvocationTargetException
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at java.lang.reflect.Method.invokeNative(Native Method)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at java.lang.reflect.Method.invoke(Method.java:511)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.view.View$1.onClick(View.java:3669)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    ... 11 more
  04-13 20:19:50.423: E/AndroidRuntime(25200): Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x59
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.content.res.Resources.getText(Resources.java:242)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at android.widget.TextView.setText(TextView.java:3773)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    at  com.example.myfirstapp.MainActivity.onBtnClicked(MainActivity.java:43)
  04-13 20:19:50.423: E/AndroidRuntime(25200):    ... 14 more
  04-13 20:19:50.453: E/android.os.Debug(718): !@Dumpstate &gt; dumpstate -k -t -z -d -o /data/log/dumpstate_app_error
  </code></pre>
  
  <p>And lastly for the xml of the button</p>
  
  <pre><code>&lt;Button
      android:id="@+id/button1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@+id/radioGroup1"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="16dp"
      android:onClick="onBtnClicked"
      android:text="Calculate" /&gt;
  </code></pre>
  
  <p>I'm not sure how to go about fixing this, so hopefully someone can help.
  Thanks.</p>