Get the height of the statusBar of Android

[tham]

From stackOverflow, the solution is

Rect rectangle = new Rect();
Window window = getWindow();
window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
int statusBarHeight = rectangle.top;
int contentViewTop = 
window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
int titleBarHeight= contentViewTop - statusBarHeight;

Problem is, how could I obtain the Activity Qt is using?

package com.tham;

import android.content.res.Resources;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import android.app.Activity;
import android.graphics.Rect;
import android.view.Window;

public class AndroidUtils
{    
    public static int statusBarHeight()
    {
        Rect rectangle = new Rect();
        //This line do not work since AndroidUtils do not inherit from Activity
        Window window = getWindow();
        window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
        int statusBarHeight = rectangle.top;
        int contentViewTop =
        window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
        return contentViewTop - statusBarHeight;
    }
}

Should I

1. Call the c++ api QtAndroid::androidActivity() from java(KDAB introduce the solutoin, haven' t tried yet)
2. Pass the QAndroidJniObject in to the java api--
   public static int statusBarHeight(Activity myActivityReference)

If 2 is better, how should I pass the Activity into the jni properly? Thanks

[tham]

I found a way to pass the Activity from c++ to jni, although I am not sure this is a correct solution or not

int get_native_status::statusBarHeight() const
{
    QAndroidJniObject activity = QtAndroid::androidActivity();
    if(activity.isValid()){
        return QAndroidJniObject::callStaticMethod<jint>
                            ("com/tham/AndroidUtils" // class name
                            , "statusBarHeight" // method name
                            , "(Ljava/lang/Object;)I",
                            activity.object<jobject>()
                            );
    }else{
        qDebug()<<"activity is invalid";
    }    

    return 0;
}

AndroidUtils.java

package com.tham;

import android.content.res.Resources;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import android.app.Activity;
import android.graphics.Rect;
import android.view.Window;

public class AndroidUtils
{    
    public static int statusBarHeight(Object myActivityReference)
    {
        Rect rectangle = new Rect();		
        Window window = ((Activity)myActivityReference).getWindow();
        window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
        int statusBarHeight = rectangle.top;
        int contentViewTop =
        window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
        return contentViewTop - statusBarHeight;
    }
}

Problem is this api give me weird value : -84.
Do anyone know how to solve it?Thanks

Edit : looks like -84 is ok, I just need to change multiply it with "-"

[J.Hilk]

hi @tham ,

I'm interested in this topic as well, could you share some more code ?

do you use QWidgets or QML as your main view port?
how did set up the full screen on qml/cpp side?
do you paint below the statusbar a custom background?
How does it behave, when you force a notch/cutout from the developer settings

PS:
as requested, I moved the topic to Mobile and Embedded.

[tham]

@j-hilk said in Get the height of the statusBar of Android:

hi @tham ,
I'm interested in this topic as well, could you share some more code ?

Hi, this is a commercial project, so I can't share it, sorry about that.

do you use QWidgets or QML as your main view port?

QML, using components from Felgo too

do you paint below the statusbar a custom background?

Yes, it it just a rectangle with the same color as the icon

How does it behave, when you force a notch/cutout from the developer settings

Not sure what is this mean, if you mean the statusBarHeight function, it works very well.

as requested, I moved the topic to Mobile and Embedded.

Thanks :)

[J.Hilk]

@tham said in Get the height of the statusBar of Android:

Hi, this is a commercial project, so I can't share it, sorry about that.

Awhe, to bad 😥

QML, using components from Felgo too

Great, my Projects are usually also QML based. Never used Felgo and don't plan on using it 😋

do you paint below the statusbar a custom background?

Yes, it it just a rectangle with the same color as the icon

So may I ask, how did you make your app full screen, and make it, that it's painted below the status bar.
All I manage is either a black background behind the Statusbar(app doesn't reach that far up), or the App is painted over the Statusbar all together.

How does it behave, when you force a notch/cutout from the developer settings

Not sure what is this mean, if you mean the statusBarHeight function, it works very well.

I actually meant this setting:
https://developer.android.com/guide/topics/display-cutout
You can simulate one in the developer settings of any android device.