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How change background OUTSIDE application window in Android?

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  • G Offline
    G Offline
    Gourmet
    wrote on last edited by
    #1

    I create aplication for Android using QMainWindow. All works fine but if I run application on device with screen resolution greater than window has - outside this window clean white field appears. I did not find the way how change this color. Later I will make scaling window but now I need make this field black. Anybody knows how change color OUTSIDE application window?

    Or just better - how make it transparent? On my Android tablet I use Calculator++. It can appear as small window in upper left screen corner. Not as applet but as window exactly. Other descktop part remains visible and responsible for taps. Can I get similar behaviuor in application based on QMainWindow?

    jsulmJ 1 Reply Last reply
    0
    • G Gourmet

      I create aplication for Android using QMainWindow. All works fine but if I run application on device with screen resolution greater than window has - outside this window clean white field appears. I did not find the way how change this color. Later I will make scaling window but now I need make this field black. Anybody knows how change color OUTSIDE application window?

      Or just better - how make it transparent? On my Android tablet I use Calculator++. It can appear as small window in upper left screen corner. Not as applet but as window exactly. Other descktop part remains visible and responsible for taps. Can I get similar behaviuor in application based on QMainWindow?

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @Gourmet Why is your app not full-screen?

      https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • G Offline
        G Offline
        Gourmet
        wrote on last edited by
        #3

        Cause I do not need full screen. On large tablet it looks ugly.

        jsulmJ 1 Reply Last reply
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        • G Gourmet

          Cause I do not need full screen. On large tablet it looks ugly.

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #4

          @Gourmet Non-fullscreen apps are actually unusual on mobiles and tablets (cannot remember any). I don't know how to change the background, I guess it is handled by the OS.

          https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • G Offline
            G Offline
            Gourmet
            wrote on last edited by Gourmet
            #5

            I know some Android apps with "windows" smaller than screen size. They work fine and they confirm - this can be done. I'm sure not the OS but application defines how it is visible on Android screen.

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            • G Offline
              G Offline
              Gourmet
              wrote on last edited by
              #6

              Adding of android:theme="@android:style/Theme.Translucent" to <activity...> tag in AdroidManifest.xml makes entire screen black. Including background of application "window". This looks much better than entire white screen. I can fill "window" background by any needed picture. Outside it screen will remain black. But I expected get transparent background outside "window" - I wanna see other application activity there. How can I do that?

              By the way - this theme setting forces standrard controls on screen look "Androidish". For example progress bar appeared like default Android progress bar - grey strip on yellow background and without border. In QtDesigner I tuned it's look differently but all my settings were lost. Buttons look different too. I afraid if I will set skins for buttons - they will be lost with theme setting. How can I force controls look as I requested but use theme for just app background? In other words - How can I force controls skinning appear AFTER Android theme applied?

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              • T Offline
                T Offline
                tataeress
                wrote on last edited by
                #7

                anyone cen help me with this same issue pls?

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                • T Offline
                  T Offline
                  tataeress
                  wrote on last edited by
                  #8

                  found it finally :D
                  u need to add add this
                  android:theme="@android:style/Theme.Translucent"
                  to <application...> section of AndroidManifest.xml.
                  then add this to your class:
                  this->setPalette(Qt::transparent);
                  source : https://bugreports.qt.io/browse/QTBUG-57394
                  thx @Gourmet a lot

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