Hide the Navigation Bar

[FernandoBanhos]

Hi,

I created an application, using LAMW, I managed to make it full screen, but the navigation bar is visible, would it be possible to hide the navigation bar?

According to the website: https://developer.android.com/training/system-ui/navigation#java

How to do this in LAMW?

Thanks

[dosza]

Hello, You can try send an email to [email protected]

[jmpessoa]

Hi, Fernando!

Go to your project folder "\res\values" and paste here the ""styles.xml" content file....

[FernandoBanhos]

This XML file does not appear to have any style information associated with it. The document tree is shown below.
<resources>
<!-- 
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
     -->
<style name="AppBaseTheme" parent="android:Theme.Light">
<!-- 
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
         -->
</style>
<!--  Application theme.  -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!--  All customizations that are NOT specific to a particular API-level can go here.  -->
<item name="android:windowActionBar">false</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>
<item name="colorPrimary">@color/primary</item>
<item name="colorPrimaryDark">@color/primary_dark</item>
</style>
</resources>

[jmpessoa]

"This XML file does not appear to have any style information associated with it....."

But it has!

You can read:

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> and others "item name" properties... The strange thing is that everything seems correct.... can you post a screenshot of your application?

[jmpessoa]

Well, you can do some try:

1)in design: go to jForm and set the property ActionBarTilte = abtHide

and/or

2)in run time: handling jForm "OnJNIPrompt" event:

procedure TAndroidModule1.AndroidModule1JNIPrompt(Sender: TObject);
begin
{if Self.HasActionBar() then}
Self.HideActionBar();
end;

[FernandoBanhos]

"Este arquivo XML não parece ter nenhuma informação de estilo associada a ele....."

Mas tem!

Você pode ler:

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> e outras propriedades de "nome do item"... O estranho é que tudo parece correto.... Você pode postar uma captura de tela do seu aplicativo?

[FernandoBanhos]

I found this function that solved the problem, would I be able to add it to LAMW sources, such as HideNavigationBar?

procedure TAndroidModule1.HideNavigationBar;
var
  jEnv: PJNIEnv;
  jParams: JObject;
  viewClass: jClass;
  setSystemUiVisibilityMethod: jMethodID;
  flags: Integer;
  args: array[0..0] of JValue;
begin
  // Obtém o ambiente JNI
  jEnv := gApp.Jni.jEnv;

  // Obtém a referência para o View do formulário principal
  jParams := Self.View;

  if jParams <> nil then
  begin
    // Define as flags para ocultar a barra de navegação e ativar o modo tela cheia
    flags := 2 {SYSTEM_UI_FLAG_HIDE_NAVIGATION} or
             4 {SYSTEM_UI_FLAG_FULLSCREEN} or
             4096 {SYSTEM_UI_FLAG_IMMERSIVE_STICKY};

    // Prepara o argumento
    args[0].i := flags;

    // Encontra a classe e o método para setSystemUiVisibility
    viewClass := jEnv^.GetObjectClass(jEnv, jParams);
    setSystemUiVisibilityMethod := jEnv^.GetMethodID(jEnv, viewClass, 'setSystemUiVisibility', '(I)V');

    // Chama o método setSystemUiVisibility com as flags desejadas
    jEnv^.CallVoidMethodA(jEnv, jParams, setSystemUiVisibilityMethod, @args);

    // Limpeza de referências locais
    jEnv^.DeleteLocalRef(jEnv, viewClass);
  end;
end;

procedure TAndroidModule1.fprincipalJNIPrompt(Sender: TObject);
begin
  HideNavigationBar;
end;