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USveswan
 

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  1. USveswan
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    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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      1. PTAnswer
    3. POHow do I change my button image with navigation drawer opening and closing
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    1. VO
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      1. POhow do I add alternate background code to an adapter without getview?
      1. USveswan
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    2. VO
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      1. POHow to make change an imagebutton upon click
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    3. VO
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      1. POHow do I add a bottom line to a container having list view?
      1. USveswan
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    1. COeven if I change everything and place anythin inside public void onDrawerClosed(View view) it crashes with a null pointer exception at android.support.v4.widget.DrawerLayout.updateDrawerState(DrawerLayout.java:459) at android.support.v4.widget.DrawerLayout$ViewDragCallback.onViewDragStateChanged(DrawerLayout.java:1348) at android.support.v4.widget.ViewDragHelper.setDragState(ViewDragHelper.java:866) at android.support.v4.widget.ViewDragHelper$2.run(ViewDragHelper.java:335) at android.os.Handler.handleCallback(Handler.java:615) at android.os.Handler.dispatchMessage(Handler.java:92)
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      1. USveswan
    2. COI need to keep the isNavigationOpen() function too for the onclick of the button, so do I define the condition as if ( isNavigationOpen() || drawerLayout.isDrawerOpen(R.id.drawer) ) { updateActionBarTitle(); drawerLayout.closeDrawer(R.id.drawer); } else { drawerLayout.openDrawer(R.id.drawer); mTitle.setText(getString(R.string.title_applications));} ?
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      1. USveswan
    3. COIt seems to be crashing at mDrawerButton.setImageResource(R.drawable.bg_helios_active); with a null pointer exception. However, when I go back to my original implementation and just add toggleNavigationPanel() in Oncreate's onDrawerOpened/Ondrawerclosed, it does recognize the swipe for the nav drawer and switches the helios button to selected and deselected accordingly, but as soon as I click the helios button , it crashes with a null pointer exception, I wonder what is causing the crash
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