Android在button.setEnabled（false）上崩溃

Question

Ok so I finally figured out the source of my problem. After a bunch of tests and trying out different things I noticed that after I put the codes

button1.setEnabled(false);
button2.setEnabled(false);
button3.setEnabled(false);
button4.setEnabled(false);

in onCreateView, it would crash upon startup. This is in my menu1_Fragment.java and is my first fragment. In my class I start off by defining my buttons.

Button button1;
Button button2;
Button button3;
Button button4;

Then the first thing I do in onCreateView is run the function setButton();

    public void setButton() {
            button1 = (Button) rootview.findViewById(R.id.upgbutton);
            button2 = (Button) rootview.findViewById(R.id.upgbutton1);
            button3 = (Button) rootview.findViewById(R.id.upgbutton2);
            button4 = (Button) rootview.findViewById(R.id.upgbutton3);
        }

What happens here is that these buttons are actually in my menu2_layout.xml which is my second fragment but my rootview allows me to find it. Then after I defined my buttons right below I set all my buttons to false as seen in the first bit of code because I don't want the user to be clicking the buttons yet. This is where I found that it crashes upon start. Here is the code for my buttons.

<LinearLayout
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:weightSum="4">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/selector_state2_xml"
            android:id="@+id/upgbutton"
            android:layout_gravity="center_horizontal" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/selector_state3_xml"
            android:id="@+id/upgbutton1"
            android:layout_gravity="center_horizontal" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/selector_state4_xml"
            android:id="@+id/upgbutton2"
            android:layout_gravity="center_horizontal" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/selector_state5_xml"
            android:id="@+id/upgbutton3"
            android:layout_gravity="center_horizontal" />


            </LinearLayout>

I gave all my buttons their own selector_state because that is what initially I thought the problem was. Here is the code for my selector.

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/button"></item>
    <item android:drawable="@drawable/buttonclick" android:state_pressed="true"></item>
    <item android:drawable="@drawable/buttongray" android:state_enabled="false"></item>

</selector>

If you can please help I have been stuck on this issue for a really long time and made more posts then I need to, but I just can't seem to solve it. Also I cannot access my logs as I am having technical issues which basically freeze my android studio when I try to click android monitor and my app is running.

If all this isn't enough I also posted on github

https://github.com/BeniReydman/Slide_Menu-Slide_Menu

I will try to solve as much questions as you may have, but I am new and this is my first App. I haven't even been doing this for over a week so please bear with it.

Answer 1

What happens here is that these buttons are actually in my menu2_layout.xml which is my second fragment but my rootview allows me to find it.

I would usually say post the error but this has thrown me,

rootview is menu1_layou.xml, the buttons are in menu2_layout.xml. So you need to call findViewById() on the View that contains the ID's you are looking for.

Yes the code will compile and your IDE will not throw any errors but that doesn't mean it will work.

If you are still having problems after you resolve this then please post the crash logs.