Parsing Integer wont work
<p>Can someone check my code? I am having my calculation for the score using <code>TextView</code> and <code>EditText</code>, i also declared Integers for the variables, but when i run my code, it gives me error when parsing integer. Thanks in advance. Also check my Log cat for more info.  Here's my code: </p>

<pre><code> initControls();
      }
      private void initControls()
      {
          amount1=(EditText)findViewById(R.id.amount1);
          amount2=(EditText)findViewById(R.id.amount2);
          amount3=(EditText)findViewById(R.id.amount3);
          result=(TextView)findViewById(R.id.result);
          calculate=(Button)findViewById(R.id.finish);
          calculate.setOnClickListener(new Button.OnClickListener()
          {public void onClick
          (View  v) { calculate();}});
      }
      private void calculate()
      {

          if(amount1.getText().toString().equals(null))
          {
          x=0;
          }
          else
              amount1.getText().toString();
              x=Integer.parseInt(amount1.getText().toString());

      if(amount2.getText().toString().equals(null)) {
          y=0; 
      }
      else
          amount2.getText().toString();
          y=Integer.parseInt(amount2.getText().toString());

     if(amount3.getText().toString().equals(null)) {
          v=0;
      }
     else
    amount3.getText().toString();
      v=Integer.parseInt(amount3.getText().toString());
      {
          z=x+y+v;
          result.setText(Integer.toString(z));
      }
</code></pre>

<p>Here's my Log cat:</p>

<pre><code>08-16 16:15:51.794: W/dalvikvm(224): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
08-16 16:15:51.794: E/AndroidRuntime(224): Uncaught handler: thread main exiting due to uncaught exception
08-16 16:15:51.824: E/AndroidRuntime(224): java.lang.NumberFormatException: unable to parse '' as integer
08-16 16:15:51.824: E/AndroidRuntime(224):  at java.lang.Integer.parseInt(Integer.java:353)
08-16 16:15:51.824: E/AndroidRuntime(224):  at java.lang.Integer.parseInt(Integer.java:323)
08-16 16:15:51.824: E/AndroidRuntime(224):  at drj.thesis.tridi.Maingame.calculate(Maingame.java:70)
08-16 16:15:51.824: E/AndroidRuntime(224):  at drj.thesis.tridi.Maingame.access$0(Maingame.java:54)
08-16 16:15:51.824: E/AndroidRuntime(224):  at drj.thesis.tridi.Maingame$1.onClick(Maingame.java:52)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.View.performClick(View.java:2364)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.View.onTouchEvent(View.java:4179)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.widget.TextView.onTouchEvent(TextView.java:6541)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.View.dispatchTouchEvent(View.java:3709)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-16 16:15:51.824: E/AndroidRuntime(224):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
08-16 16:15:51.824: E/AndroidRuntime(224):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
08-16 16:15:51.824: E/AndroidRuntime(224):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.os.Handler.dispatchMessage(Handler.java:99)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.os.Looper.loop(Looper.java:123)
08-16 16:15:51.824: E/AndroidRuntime(224):  at android.app.ActivityThread.main(ActivityThread.java:4363)
08-16 16:15:51.824: E/AndroidRuntime(224):  at java.lang.reflect.Method.invokeNative(Native Method)
08-16 16:15:51.824: E/AndroidRuntime(224):  at java.lang.reflect.Method.invoke(Method.java:521)
08-16 16:15:51.824: E/AndroidRuntime(224):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
08-16 16:15:51.824: E/AndroidRuntime(224):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
08-16 16:15:51.824: E/AndroidRuntime(224):  at dalvik.system.NativeStart.main(Native Method)
08-16 16:15:51.857: I/dalvikvm(224): threadid=7: reacting to signal 3
08-16 16:15:51.864: E/dalvikvm(224): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
</code></pre>
