Android Question AppCompat Bar won't work

Discussion in 'Android Questions' started by Dianzoa, Jun 2, 2019.

  1. Dianzoa

    Dianzoa Active Member Licensed User

    Can't use it on my project. Got this.
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setDisplayHomeAsUpEnabled(boolean)' on a null object reference

    I copy the examples on the AppCompat project from Erel. The example works, but when added the reference and use it on my project, fails.
    Any tips? I use b4a 8.50 This is my manifest.
    Code:
    'This code will be applied to the manifest file during compilation.
    'You do not need to modify it in most cases.
    'See this link for for more information: https://www.b4x.com/forum/showthread.php?p=78136
    AddManifestText(
    <uses-sdk android:minSdkVersion=
    "14" android:targetSdkVersion="28"/>
    <supports-screens android:largeScreens=
    "true"
        android:normalScreens=
    "true"
        android:smallScreens=
    "true"
        android:anyDensity=
    "true"/>)
    SetApplicationAttribute(android:icon, 
    "@drawable/icon")
    SetApplicationAttribute(android:
    label"$LABEL$")
    SetApplicationAttribute(android:networkSecurityConfig, @xml/network_security_config)
    SetApplicationAttribute(android:theme, 
    "@android:style/Theme.Material.Light")
    SetApplicationAttribute(android:theme, 
    "@style/MyAppTheme")
    CreateResource(xml, network_security_config.xml,
    <network-security-config>
    <base-config cleartextTrafficPermitted=
    "true">
        <trust-anchors>
            <certificates src=
    "system" />
        </trust-anchors>
    </base-config>
    </network-security-config>

    )

    SetApplicationAttribute(android:theme, 
    "@style/MyAppTheme")

    CreateResource(values, theme.xml,
    <resources>
        <style name=
    "MyAppTheme" parent="Theme.AppCompat.Light.NoActionBar">
            <item name=
    "colorPrimary">#ff039be5</item>
            <item name=
    "colorPrimaryDark">#ff039be5</item>
            <item name=
    "colorAccent">#AAAA00</item>
            <item name=
    "windowNoTitle">true</item>
            <item name=
    "windowActionBar">true</item>
        </style>
    </resources>
    )


    CreateResource(values, dimen.xml,
    <resources>
    <dimen name=
    "action_button_padding">10dp</dimen>
    </resources>
    )
    CreateResource(values, 
    colors.xml,
    <resources>
        <color name=
    "actionbar">#ff039be5</color>
        <color name=
    "statusbar">#ff006db3</color>
        <color name=
    "textColorPrimary">#ffffffff</color>
        <color name=
    "navigationBar">#ff006db3</color>
    </resources>
    )
     
  2. Erel

    Erel Administrator Staff Member Licensed User

    Please post the full error message from the logs.

    Compare your code to the "minimal example". Also make sure to add an ACToolBarLight with the designer.
     
  3. Dianzoa

    Dianzoa Active Member Licensed User

    I copy the same code from this example
    upload_2019-6-2_5-38-17.png

    The toolbarhelper added by code, I could not find it in the designer.
     
  4. Dianzoa

    Dianzoa Active Member Licensed User

    Here is the full log

    Registo conectado a: HUAWEI DRA-LX3
    --------- beginning of crash
    --------- beginning of main
    *** Service (starter) Create ***
    ** Service (starter) Start **
    ** Activity (main) Create, isFirst = true **
    25
    %
    A
    Santa Clara Catholic College,asuncion
    ** Activity (main) Resume **
    ** Activity (main) Pause, UserClosed = true **
    ** Activity (menu_principal) Create, isFirst = true **
    Error occurred on line: 0 (menu_principal)
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setDisplayHomeAsUpEnabled(boolean)' on a null object reference
    at de.amberhome.objects.appcompat.ACActionBar.setShowUpIndicator(ACActionBar.java:116)
    at com.anzoategui.enviapycliente.menu_principal._activity_create(menu_principal.java:384)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:738)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:360)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:260)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at com.anzoategui.enviapycliente.menu_principal.afterFirstLayout(menu_principal.java:104)
    at com.anzoategui.enviapycliente.menu_principal.access$000(menu_principal.java:17)
    at com.anzoategui.enviapycliente.menu_principal$WaitForLayout.run(menu_principal.java:82)
    at android.os.Handler.handleCallback(Handler.java:795)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:166)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:450)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
    ** Activity (menu_principal) Resume **
     
  5. Erel

    Erel Administrator Staff Member Licensed User

    [​IMG]

    You have a small working example. Compare it to your project.
     
  6. Dianzoa

    Dianzoa Active Member Licensed User

    Thanks, I think I compare it already, not seem to be any differences, for the time being I just will keep using the action bar, since so far I found that won't need features of the AC bar. I will come to it again if I need it.
     
Loading...
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice