title: E/AndroidRuntime﹕ FATAL EXCEPTION: main
body: <p>while I test my app, I get the follow error in the Android-Studio-Consol:</p>
  
  <pre><code>08-21 13:56:28.059    9637-9637/net.dominik.genpush E/AndroidRuntime﹕ FATAL EXCEPTION: main
  Process: net.dominik.genpush, PID: 9637
  java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{net.dominik.genpush/net.dominik.genpush.settings}: java.lang.NullPointerException
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
          at android.app.ActivityThread.access$800(ActivityThread.java:135)
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
          at android.os.Handler.dispatchMessage(Handler.java:102)
          at android.os.Looper.loop(Looper.java:136)
          at android.app.ActivityThread.main(ActivityThread.java:5001)
          at java.lang.reflect.Method.invokeNative(Native Method)
          at java.lang.reflect.Method.invoke(Method.java:515)
          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
          at dalvik.system.NativeStart.main(Native Method)
   Caused by: java.lang.NullPointerException
          at android.app.Activity.findViewById(Activity.java:1884)
          at net.dominik.genpush.settings.&lt;init&gt;(settings.java:23)
          at java.lang.Class.newInstanceImpl(Native Method)
          at java.lang.Class.newInstance(Class.java:1208)
          at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2101)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
              at android.app.ActivityThread.access$800(ActivityThread.java:135)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:136)
              at android.app.ActivityThread.main(ActivityThread.java:5001)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
              at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>Here is the piece of code:</p>
  
  <pre><code>public CheckBox checkBox_push;
      public TextView textView_appby;
      public Button button_feedback;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_settings);
  
          checkBox_push = (CheckBox) findViewById(R.id.checkBox_push);
  
          textView_appby = (TextView) findViewById(R.id.textView_appby);
  
          button_feedback = (Button) findViewById(R.id.button_feedback);
      }
  
      public void onTextClickAppBy(View x)
      {
          Intent intent = new Intent();
          intent.setAction(Intent.ACTION_VIEW);
          intent.addCategory(Intent.CATEGORY_BROWSABLE);
          intent.setData(Uri.parse("http://www.dominiktv.net"));
          startActivity(intent);
      }
  
      //Button Status Speichern
      @Override
      public void onPause() {
          super.onPause();
          save(checkBox_push.isChecked());
      }
  
      @Override
      public void onResume() {
          super.onResume();
          checkBox_push.setChecked(load());
      }
  
      private void save(final boolean isChecked) {
          SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);
          SharedPreferences.Editor editor = sharedPreferences.edit();
          editor.putBoolean("check", isChecked);
          editor.commit();
  
      }
  
      private boolean load() {
          SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);
          return sharedPreferences.getBoolean("check", true);
      }
      public void onCheckboxPush(View b)
      {
          if (checkBox_push.isChecked())
          {
              //PB
              Pushbots.getInstance().setNotifyStatus(true);
              //PB E
              Toast.makeText(getApplicationContext(), "Push-Benachrichtigungen aktiviert",
                      Toast.LENGTH_SHORT).show();
          }
          else
          {
              //PB
              Pushbots.getInstance().setNotifyStatus(false);
              //PB E
              Toast.makeText(getApplicationContext(), "Push-Benachrichtigungen deaktiviert",
                      Toast.LENGTH_SHORT).show();
          }
      }
  </code></pre>
  
  <p>The app also works with the error, but it is not nice to have an error in one app.
  I already googled a lot but my java skills are not enough very far and this is my first self-created app</p>