[Android Software Development] iamareebjamal:
Theming Part​

General APK png Resources

Here I will tell you where to find some pngs to theme your Phone

Note: Here I will tell location of pngs but that may differ based on modification done to your ROM by OEMs or devs. These pngs are found after decompiling or extracting the apk files. For more reference, read this.

In this part, there is only brief information, but for a very good guide, please go here. I haven't covered it all up as d3cka himself has done a marvellous job in making that guide. All the things present in that guide should solve all your queries.

Battery Icons -

(i)Ice Cream Sandwich/Jelly Bean: SystemUI.apk/res/drawable-xdpi/stat_sys_battery**.png

(ii)Gingerbread: framework-res.apk/res/drawable-xdpi/stat_sys_battery**.png

Status Bar icons - SystemUI.apk/res/drawable-xdpi/

Note, some, however very few status bar icons are also present in framework-res.apk

Platlogo - framework-res.apk/res/drawable-nodpi/platlogo*.jpg

(image that pops up when repeatedly clicked on Android Version)

In Gingerbrad, its a single file but in ICS and JB, they are many images.

Default Wallpaper - framework-res/res/drawable-xdpi/default_wallpaper.jpg

Default Lockscreen Wallpaper[?] - framework-res.apk/res/drawable-xdpi/zzzzzzzz_default_lockscreenw.jpg

On stock based HTC roms, the default wallpaper location is specified in the.build.prop (so the dev can either swap out the image, or change the path)

The default wallpaper path for HTC roms is /system/customize/resource/wallpapers_a_00.jpg (Thanks to CNExus)

Spinners[GB] - framework-res.apk/res/drawable-xdpi/spinner_****_**.png

(The loading circles)

Menu Icons - framework-res.apk/res/drawable-xdpi/ic_menu_**.png

These icons may also be present in twframework-res.apk for Samsung Touchwiz ROMs

Notification Toggles

(i)With lidroid 15 toggles : lidroid-res.apk/res/drawable-xdpi/

(ii)Without lidroid mod : SystemUI.apk/res/drawable-xdpi

These were some general pngs of system apps that may be used to theme the phone. You can find respective pngs to theme in their apks.

Will add more soon...

9 PNG Discussion

These are special types of pngs that can be stretched to fit the need of program or different scenarios or cases. It contains 1 pixel lines on each border of different lengths for different things

As told above, we can't edit 9 png in compiled form as it will lose these lines which define its properties. So, we first need to decompile apk in order to edit 9 pngs

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So, after decompiling apk, open 9 png in Photoshop and select the part inside that 1 px border and edit anything you want (Hue, Saturation, Bevel, Emboss, ANYTHING)

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Now save it (save it as a normal png and then rename it as .9.png because photoshop doesn't recognise 9 png extension and image will loose its RGB format)

Explanation of 9 png:-

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You can read this for more information

If you have doubt that you have gone wrong somewhere or you have made a new png from scratch and want to test if it is correct or not:

(Check all 9 png files you edit as they can cause Force Closes or bootloops)

Go to folder where you extracted android-sdk and go to tools folder and open draw9patch.bat

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A window like this will open up:-

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Drop you 9 png here

A new window will open with you 9 png on it

Tick on show bad patches

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If you see red rectangles, you have a bad 9 patch image. You will need to delete or add those lines in png to remove all red boxes. If you want to delete, press Shift and start moving cursor over lines you want to delete. You can choose method of hit and trial to remove all rectangles and move the lower scale to see how your image size is adjusted

Or you can do what I do:

1. Remove all lines

2. Add single dot on top centre and left centre border of image (That can be taken as stretchable area)

3. Add lines on right and bottom of image where you want to fill content. Now, click on Show Content

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The purple area you see in image is the content area (Text will be filled there. Eg:- Popup Menu)

4. Now, you can adjust these lines acoording to your need that what you want for stretchable area and content area until an unless there comes an red triangle

5. When it is done. Save the file. DONE

Easy, isn't it?

That's what theming is

Batch Editing pngs in Photoshop

Well the scenario is you have 200 pngs and you want to change their color, hue, add effect to them, etc. Definitely not worth the time you will spent doing this one by one. So, here, I will cover how to batch apply same edits on to your infinite pngs. Here, I am taking example of changing color of battery png from green to purple, you can apply any attribute to your image in the same way. I repeat it is not for .9.png files. Read above guide for reference

Let's start

1. First copy all your pngs you need to edit in a separate folder. I have made a folder named Battery Base and pasted my all pngs of battery there.

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Now create another folder where your edited pngs will be saved. For eg:- Battery Done. (Don't create it inside Battery Base folder)

2. Open Adobe Photoshop and Choose Window>Actions or Alt+F9

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3. Click on the note like file (Create new Action)

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Rename it to anything you want . I have chosen Battery_color

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Then click on Record. Now, you will see that red circle is enabled and now everything you do on image will be recorded and will be applied on each image.

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4. Now, do this very carefully, don't miss any step.

We will do every thing that we want Photoshop to do with each file we want to edit.

a) So, first we want Photoshop to open the image. So , click on Open and choose any png from Battery Base folder (Choose a file with more color so that you know what color exactly your file will be after editing. That is why I chose 90 percent battery here).

b) Now, after opening, we want to change Color of png from green to purple. So, choose Image>Adjustment>Hue and Saturation or Ctrl+U

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A dialog box with 3 sliders will appear. Move upper slider to change color. You can move other slider to change saturation and brightness if you want. Now, if you got it right, click on OK.

Every step of yours is being recorded, so don't do unnecessary stuff you don't want to do on other images. Nonetheless, if you have done it, then Drop down the Battery Base Action in action palette and you will see your every action there, If you want to delete any action , you can delete it from there. You can also add any action before pre completed action by clicking above that action and performing it.

Now, you can do anything you want to be done on your rest of pngs.

c) Now, we want Photoshop to save this png to carry on working on others. So, Go to File>Save as... and save it as a png in Battery Done folder. Photoshop will ask you to choose, so choose smallest compression and no interlace.

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d) Image is saved but we also want Photoshop to close the png so that it does not open 200 tabs for editing 200 pngs. So, click on close (Small cross on title bar of png). If, it asks that do you want to save changes to png . Say no, because if you say yes, the png in Battery Base will be changes and when batch processing is done, that png in Battery Done will be of different color that all others.And also, your all green pngs in Battery Base folder will turn purple too. But we want purple images in Battery Done and green in Battery Base.

5. Now, we hae done what we want, so, we will stop recording the Action. Click on that square in Actions Palette.

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6. Fun Starts. Now we will do the batch processing.

Go to File>Automate>Batch

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In the dialog box, Choose the action to be Battery_Color (or obiviously any action you created)

Source folder: Battery Base

Destination Folder: Battery Done

Tick both Override Action 'Open' commands and Override Action 'Save as' commands

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Click on OK. Sit back for 3 to 5 minutes(204 pngs) and TADA :)

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You can apply any action in same way. Such as bevel, glossy, pale, etc to innumerous amount of pngs