Rj. Ok Rj. Ok - 1 month ago 12
Android Question

How to initialize menu library in Android

I want use this library for menu in my Application : GuillotineMenu-Android.

For close menu with

onBackPress
button i use this code :

@Override
public void onBackPressed() {
if (!isOpened) {
super.onBackPressed();
}
mGuillotineAnimation.close();
}


and set this codes to builder :

.setGuillotineListener(new GuillotineListener() {
@Override
public void onGuillotineOpened() {
isOpened = true;
}

@Override
public void onGuillotineClosed() {
isOpened = false;
}
})


Builder full code:

View guillotineMenu = LayoutInflater.from(this).inflate(R.layout.menu_layout, null);
root.addView(guillotineMenu);
toolbar_menuImage = (ImageView) toolbar.findViewById(R.id.toolbar_pages_logo);
new GuillotineAnimation.GuillotineBuilder(guillotineMenu, guillotineMenu.findViewById(R.id.menu_layout_image), toolbar_menuImage)
.setStartDelay(RIPPLE_DURATION)
.setActionBarViewForAnimation(toolbar)
.setClosedOnStart(true)
.setGuillotineListener(new GuillotineListener() {
@Override
public void onGuillotineOpened() {
isOpened = true;
}

@Override
public void onGuillotineClosed() {
isOpened = false;
}
})
.build();


and write this code above of onCreate() method :

private GuillotineAnimation mGuillotineAnimation;
private boolean isOpened = true;


but when running application, and click
onBackPress
button show me this error :

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.app, PID: 28891
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.example.app.Components.SlidingMenu.animation.GuillotineAnimation.close()' on a null object reference
at com.example.app.Activities.Category_page.onBackPressed(Category_page.java:256)
at android.app.Activity.onKeyUp(Activity.java:2506)
at android.view.KeyEvent.dispatch(KeyEvent.java:2633)
at android.app.Activity.dispatchKeyEvent(Activity.java:2757)
at android.support.v7.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:543)
at android.support.v7.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:53)
at android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.dispatchKeyEvent(AppCompatDelegateImplBase.java:312)
at android.support.v7.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:53)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:2297)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3995)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3957)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3488)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3541)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3507)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3515)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3488)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3541)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3507)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3617)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3515)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3674)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3488)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3541)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3507)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3515)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3488)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3541)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3507)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3650)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3811)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2242)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1883)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1874)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:2219)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:143)
at android.os.Looper.loop(Looper.java:122)
at android.app.ActivityThread.main(ActivityThread.java:5349)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)


I think i should Initialize mGuillotineAnimation in
onCreate()
method, but how can i initialize this?

Thanks all <3

Answer

You forgot to instanciate mGuillotineAnimation :

 mGuillotineAnimation = new GuillotineAnimation.GuillotineBuilder(guillotineMenu, guillotineMenu.findViewById(R.id.menu_layout_image), toolbar_menuImage)
        .setStartDelay(RIPPLE_DURATION)
        .setActionBarViewForAnimation(toolbar)
        .setClosedOnStart(true)
        .setGuillotineListener(new GuillotineListener() {
            @Override
            public void onGuillotineOpened() {
                isOpened = true;
            }

            @Override
            public void onGuillotineClosed() {
                isOpened = false;
            }
        })
        .build();