I'm just wondering if the seekbar changed in Android 3.0 . I tried to create one but it showing up as a green line with a circle on it instead of the usual yellow rectangle. If so, is there any other option to create a similar seekbar to control volume on 3.0? Thanks guys.
I'm just wondering if the seekbar changed in Android 3.0 .
More accurately, it changed with the "holographic" theme that is the standard for Android 3.0 (and, presumably, beyond).
I tried to create one but it showing up as a green line with a circle on it instead of the usual yellow rectangle.
Correct. That is what your users will expect to see.
If so, is there any other option to create a similar seekbar to control volume on 3.0?
I would recommend that you leave it alone. The objective should be to give the user what they are familiar with. If most other applications with seek bars -- and the OS itself -- are using the new seek bar style, ideally you will too.
Note that the new style only takes effect if you are adopting the holographic theme (e.g., android:targetSdkVersion="11"), which means you are buying into the entire new Honeycomb look and feel (action bar, change to the way a Spinner looks, etc.).
You are welcome to use your own style and substitute in your own graphics, using the styleable portions of ProgressBar and SeekBar (SeekBar inherits from ProgressBar), or in your XML layouts (e.g., android:thumb), or via Java code.
Related
I am in a fairly serious predicament. I have built my entire app using ?attr/colorPrimary to pick the color for background shapes, as I have devised a way to dynamically change the theme and color. This works perfectly on 5.0, but on all 4.x devices, ?attr/colorPrimary crashes the app. Why does Android studio not alert developers to this incompatibility?
Is there a support version of ?attr/colorPrimary?
colorPrimary is already part of AppCompat as of version 21 and works back to API 7. Your problem is instead with your theming code.
I believe it was added after Android Lollipop - API 21.
At least this link shows that it was added between API 20 and 21:
https://developer.android.com/sdk/api_diff/21/changes/android.R.attr.html
attr/colorPrimary just point to colorPrimary defined in current theme.
I'm not sure how you implemented your theme.. But you can create your own attr... This option is good only if you support several themes.
If you have a single theme, I believe you can replace it by a color.
API 21:
Material design style
Notifications are drawn with dark text atop white (or very light)
backgrounds to match the new material design widgets. Make sure that
all your notifications look right with the new color scheme. If your
notifications look wrong, fix them:
Use setColor() to set an accent color in a circle behind your icon
image. Update or remove assets that involve color. The system ignores
all non-alpha channels in action icons and in the main notification
icon. You should assume that these icons will be alpha-only. The
system draws notification icons in white and action icons in dark
gray.
The problem is a glitch in Android code. See this, it is not the exact same but the reason is.
In case anyone out there has this problem, I want to explain my workaround.
Remove all instances of "?attr/color(Primary, Dark, or Accent)" and attempt to mimic the effect in each individual element in each individual activity. This is not a full work around, but for me it works. Google really needs to resolve this issue. If you know a better work around, please let me know and I will accept it as the better answer as long as it works.
I have just tried implementing a ProgressBar with the following two styles:
?android:attr/progressBarStyleLarge
?android:attr/progressBarStyleSmall
However, they are the old, vanilla progress spinners that Android has always had. See below:
I'm looking for the progress bar that comes with the 4.+ theme. It's the one that has one progress indicator rotating clockwise, and a semi-transparent indicator running counterclockwise at a slower pace. The heads then intersect at 5 points (star formation) across the circle, like the image below.
How do I get this ProgressBar in my app?
You should define a custom theme, then have it inherit from Theme.Holo in API level 11+, and from Theme for all others (or their light variants). To do so, see Select a theme based on platform version.
That way the progressBarStyleLarge attribute will be mapped to the new resource (progress_large_holo) in devices that support it. This will also change all other resources though (such as backgrounds for EditText, &c).
I want to create a custom title bar, somewhat like this, in my Android app. Please pardon if my question seems idiotic, I'm a beginner. Can anyone tell me if it is a titlebar or an Action bar? Plus how can I give this Shaded Black color to my titlebar/action bar?
PS: I'm using GingerBread on my Android. My app will require minimum SDK version to be 4 but it targets Jelly bean too. In GingerBread, I can't make use of ActionBars. Please help me with the problem. It would be highly appreciated.
You will want to use the ActionBarSherlock library for this (which will allow you to use this all the way back to SDK version 4).
It is reasonably easy to style, and is for sure the right way to do this. Lots of examples for this, as it is a very popular library.
http://actionbarsherlock.com/
If you are wanting to target min API 4, then as you state you'll be unable to use the ActionBar.
So you could just create your bar as a LinearLayout or something with whatever buttons / icons you want on it and have it at the top of all of your Activities. If you have many of them it would probably be worth it to refactor the Bar (click handlers and such) handling into a subclass of Activity, and then extend that with all of your other activities.
The visual effect could be easily achived with a 9-patch png set as the background of a LinearLayout. Just make the gradient you want in photoshop/Gimp and drop it into draw9Patch to add the pixels on the edge that will allow it to stretch nicely to fit any screen.
Edit: using actionbar sherlock as others suggested is probably a better idea than doing it "manually" as I suggested.
I'm looking at how to give an app that I develop and deploy it's own look and feel. So I read about the Style and Themes on developer.android.com. After some initial success with text color, text size, background color... I seem to get stuck at changing buttons, toggle buttons... It appears to me that to change the color of a button a .9.png file must be created (possibly for the different dpi's). Looking at the artwork in the default style, I see a large number of these .9.png files. To have a consistent style they should all be updated.
Is it correct to say that defining a new style involves modifying/recreating the .9.png files?
If no, how should one go about modifying the style of these .9.png based elements?
If so, are there any tools that assist with creating a custom style? And are there any style packages that can be downloaded/purchased?
I'm not sure it's a good idea to give a new look to every UI control in your application unless you are a very experienced designer. Probably, we can't beat Google designers at their craft and it would be better to comply with existing styles adding some cool features instead of changing button colors at random.
I'm just wondering if the seekbar changed in Android 2.1 . I tried to create one but it showing up as a green line with a circle on it instead of the usual yellow rectangle. If so, is there any other option to create a similar seekbar to control volume on 2.1? Thanks
You can use the setThumb() and setProgressDrawable() of SeekBar to customize the UI