Android Question How can I change the colors and images according to the applied theme ?

[mr.gedo]

Hello all,
Good Day,

i use this example here to change the themes inside my app and it's work fine but I have 4 questions, please

1- How can I change the theme for all activities in my app?
2- Can I change the panel or custom tools, (background color) from manifest?
3- How can I change the background image for each theme?
4- How can I know the name of the applied theme so I can use the if condition to change everything I need it at runtime

Best Regards

 

[mr.gedo]

sorry I forget to write the example link

Changing the theme at runtime

Using the hooks feature it is possible to change the Activity theme at runtime. The theme is set before the activity is actually shown. This means that in order to change the theme we need to destroy the activity and start it again. You can use StateManager to save the activity state. The...

www.b4x.com

 

[Erel]

This is not the correct solution.

You can see a quite complex example here: https://www.b4x.com/android/forum/t...todon-pleroma-social-networks.124214/#content

 

[mr.gedo]

This is not the correct solution.

Hello @Erel , thank you for your replay

Do you mean that if I use this example the application will not work well?
I found a way to apply the theme to all activities by putting the java code in Activity_Create

I don't want to change the theme at runtime, i mean when I load the activity in Activity_Create I want to check the currently applied theme, if it is dark for example I will change the background image to a dark image

I tried to know the applied theme from (Theme_Value) it shows me the number of current theme only when app is run but if i close app and open it again the theme_value = 0

You can see a quite complex example here: https://www.b4x.com/android/forum/t...todon-pleroma-social-networks.124214/#content

This is a very complicated example and I can't use it in my app

 

[Erel]

Do you mean that if I use this example the application will not work well?

I mean that this approach will be difficult and limited.

The way I would have done it is:
1. Never use activities. Only B4XPages.
2. Create a "theme manager" that uses different color palettes. In the Pleroma example I've used this tool to create two palettes: https://www.b4x.com/android/forum/threads/dark-light-color-palette.114513/#content

 

[mr.gedo]

I mean that this approach will be difficult and limited.

The way I would have done it is:
1. Never use activities. Only B4XPages.
2. Create a "theme manager" that uses different color palettes. In the Pleroma example I've used this tool to create two palettes: https://www.b4x.com/android/forum/threads/dark-light-color-palette.114513/#content

The problem is I use an old project so I can't convert it to B4XPages at this time and also I use custom transition between activities and I know it not working with B4XPages.

I thinking about saving the Theme Value and then read it again when I load the activity !!! so If this will be a correct solution for my case at this time please let me know

Your advice is appreciated