title: Android Image not switching
body: <p>I'm working on a piece of code that could switch image using Menu inflater, i've worked on code but it gives me force close error as soon as i click the button. here is my code:</p>
  
  <pre><code>@Override
      public boolean onCreateOptionsMenu(Menu menu) {
          // TODO Auto-generated method stub
          MenuInflater inflater = getMenuInflater();
          inflater.inflate(R.menu.menu, menu);
          return true;
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          // TODO Auto-generated method stub
          switch (item.getItemId()) {
          case R.id.cameraa:
              Toast.makeText(this, "Start Camera!", Toast.LENGTH_LONG).show();
              break;
  
          case R.id.gallery:
           Toast.makeText(this, "this is gallery!", Toast.LENGTH_LONG).show();
          break;
  
  
      public boolean onOptionsItemSelected(MenuItem item) {
          // TODO Auto-generated method stub
          switch (item.getItemId()) {
  
  
      case R.id.ghost_gallery:
              switcher.showNext();
  break
              }
              return true;
          }
  </code></pre>
  
  <p>main.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical" &gt;
   &lt;ViewSwitcher
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:layout_weight="1" &gt;
  
          &lt;FrameLayout
              android:id="@+id/frame"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent" &gt;
  
          &lt;ImageView
              android:id="@+id/imageView"
              android:layout_width="fill_parent"
              android:layout_height="match_parent"
              android:scaleType="matrix"
              android:src="@drawable/banana" /&gt;
          &lt;/FrameLayout&gt;
  
          &lt;FrameLayout
              android:layout_width="fill_parent"
              android:layout_height="fill_parent" &gt;
  
          &lt;ImageView
              android:id="@+id/imageView"
              android:layout_width="fill_parent"
              android:layout_height="match_parent"
              android:scaleType="matrix"
              android:src="@drawable/apple" /&gt;
          &lt;/FrameLayout&gt;
      &lt;/ViewSwitcher&gt;
  </code></pre>
  
  <p>here is my log</p>
  
  <pre><code>05-21 03:19:35.733: E/AndroidRuntime(758): FATAL EXCEPTION: main
  05-21 03:19:35.733: E/AndroidRuntime(758): java.lang.NullPointerException
  05-21 03:19:35.733: E/AndroidRuntime(758):  at org.example.touch.Touch.nextView(Touch.java:188)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at org.example.touch.Touch.onOptionsItemSelected(Touch.java:180)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at android.app.Activity.onMenuItemSelected(Activity.java:2195)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:730)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:143)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:532)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at android.view.View$PerformClick.run(View.java:8816)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at android.os.Handler.handleCallback(Handler.java:587)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at android.os.Handler.dispatchMessage(Handler.java:92)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at android.os.Looper.loop(Looper.java:123)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at android.app.ActivityThread.main(ActivityThread.java:4627)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at java.lang.reflect.Method.invokeNative(Native Method)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at java.lang.reflect.Method.invoke(Method.java:521)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
  05-21 03:19:35.733: E/AndroidRuntime(758):  at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>Kindly help me regarding this matter....
  Best Regards,</p>