title: Get integer value from edittext
body: <p>When I try to run the code below, my program has stops. I want this code to get the value from <code>edittext</code> but it´s not working as I expected it. What am I doing wrong?</p>
  
  <pre><code>public class MainActivity extends Activity {
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  
      Button sum = (Button) findViewById(R.id.button1);
      Button cancel = (Button) findViewById(R.id.button2);
  
      final EditText from = (EditText) findViewById(R.id.editText1);
      final EditText upto = (EditText) findViewById(R.id.editText2);
      final EditText runsum = (EditText) findViewById(R.id.editText3);
  
      final int f = Integer.parseInt(from.getText().toString());
      final int u = Integer.parseInt(upto.getText().toString());
  
  }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          getMenuInflater().inflate(R.menu.activity_main, menu);
          return true;
      }
  }
  </code></pre>
  
  <p>Here is my LogCat sorry for mess :/ </p>
  
  <pre><code>08-28 19:34:44.241: E/Trace(3346): error opening trace file: No such file or directory (2)
  08-28 19:34:44.780: D/AndroidRuntime(3346): Shutting down VM
  08-28 19:34:44.780: W/dalvikvm(3346): threadid=1: thread exiting with uncaught exception(group=0x40a13300)
  08-28 19:34:44.790: E/AndroidRuntime(3346): FATAL EXCEPTION: main
  08-28 19:34:44.790: E/AndroidRuntime(3346): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.project/com.example.project.MainActivity}: java.lang.NumberFormatException: Invalid int: ""
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.ActivityThread.access$600(ActivityThread.java:130)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.os.Handler.dispatchMessage(Handler.java:99)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.os.Looper.loop(Looper.java:137)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.ActivityThread.main(ActivityThread.java:4745)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at java.lang.reflect.Method.invokeNative(Native Method)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at java.lang.reflect.Method.invoke(Method.java:511)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at dalvik.system.NativeStart.main(Native Method)
  08-28 19:34:44.790: E/AndroidRuntime(3346): Caused by: java.lang.NumberFormatException: Invalid int: ""
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at java.lang.Integer.invalidInt(Integer.java:138)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at java.lang.Integer.parseInt(Integer.java:359)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at java.lang.Integer.parseInt(Integer.java:332)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at com.example.project.MainActivity.onCreate(MainActivity.java:25)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.Activity.performCreate(Activity.java:5008)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
  08-28 19:34:44.790: E/AndroidRuntime(3346):     ... 11 more
  08-28 19:35:10.560: E/Trace(3394): error opening trace file: No such file or directory (2)
  08-28 19:35:11.629: D/gralloc_goldfish(3394): Emulator without GPU emulation detected.
  08-28 19:48:19.295: I/Choreographer(3394): Skipped 41 frames!  The application may be doing too much work on its main thread.
  </code></pre>