title: CalendarView in Dialog
body: <p>i would like to display a CalendarView in a dialog , at the center of the screen.
  Why in the dialog ? Because when i open my CalendarView , it's take all the screen , whereas i would like to display it , in dialog to see the background..</p>
  
  <p>So it's my calendar_main.xml </p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent" &gt;
  
  &lt;CalendarView
      android:id="@+id/calendarView1"
      android:layout_width="400dp"
      android:layout_height="400dp"
     android:layout_marginLeft="150dp"/&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>and it's my method who open my calendar</p>
  
  <pre><code>public void showCalendar() {
  
      Dialog dialog = new Dialog(getBaseContext());
  
  
  //      setContentView(R.layout.calendar_main);
       cal = (CalendarView) findViewById(R.id.calendarView1);
  
       dialog.setContentView(R.layout.calendar_main);
       cal.setOnDateChangeListener(new OnDateChangeListener() {
  
           @Override
              public void onSelectedDayChange(CalendarView view, int year, int month,
                      int dayOfMonth) {
                  // TODO Auto-generated method stub
  
                  Toast.makeText(getBaseContext(),"Selected Date is\n\n"
                      +dayOfMonth+" : "+month+" : "+year , 
                      Toast.LENGTH_LONG).show();
  
              }
          });
  }
  </code></pre>
  
  <p>Without Dialog , my calendar open correctly with the good size that i defined in xml. but with dialog, my app crash..</p>
  
  <p>It's my error log : </p>
  
  <pre><code>E/AndroidRuntime(27862): FATAL EXCEPTION: main
  E/AndroidRuntime(27862): java.lang.NullPointerException
  E/AndroidRuntime(27862): at com.pdf.GetViewPDF.showCalendar(GetViewPDF.java:90)
  E/AndroidRuntime(27862): at    com.pdf.GetViewPDF.onOptionsItemSelected(GetViewPDF.java:113)
  E/AndroidRuntime(27862): at android.app.Activity.onMenuItemSelected(Activity.java:2453)
  E/AndroidRuntime(27862): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:846)
  E/AndroidRuntime(27862): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:153)
  E/AndroidRuntime(27862): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:956)
  E/AndroidRuntime(27862): at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:170)
  E/AndroidRuntime(27862): at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:85)
  E/AndroidRuntime(27862): at android.view.View.performClick(View.java:3117)
  E/AndroidRuntime(27862): at android.view.View$PerformClick.run(View.java:11941)
  E/AndroidRuntime(27862): at android.os.Handler.handleCallback(Handler.java:587)
  E/AndroidRuntime(27862): at android.os.Handler.dispatchMessage(Handler.java:92)
  E/AndroidRuntime(27862): at android.os.Looper.loop(Looper.java:132)
  E/AndroidRuntime(27862): at android.app.ActivityThread.main(ActivityThread.java:4123)
  E/AndroidRuntime(27862): at java.lang.reflect.Method.invokeNative(Native Method)
  E/AndroidRuntime(27862): at java.lang.reflect.Method.invoke(Method.java:491)
  E/AndroidRuntime(27862): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
  E/AndroidRuntime(27862): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
  E/AndroidRuntime(27862): at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>Otherwise , i call showCalendar from a item buton in my ActionBar
  and the NullPointerException appear when i call my listener :</p>
  
  <pre><code>cal.setOnDateChangeListener(new OnDateChangeListener() {...
  </code></pre>