Here are [`slide_in_right`][1] and [`slide_out_left`][2] from the Android open source project.


  [1]: https://android.googlesource.com/platform/frameworks/base/+/HEAD/core/res/res/anim/slide_in_right.xml
  [2]: https://android.googlesource.com/platform/frameworks/base/+/HEAD/core/res/res/anim/slide_out_left.xml

```
android:inAnimation=&quot;@android:anim/slide_in_left&quot;
android:outAnimation=&quot;@android:anim/slide_out_right&quot;
```

Both `slide_in_right` and `slide_out_left` exist in Android 2.1 and above.

What&#39;s better practice in a user-defined function in Python: `raise` an exception or `return None`?  For example, I have a function that finds the most recent file in a folder.

    def latestpdf(folder):
        # list the files and sort them
        try:
            latest = files[-1]
        except IndexError:
            # Folder is empty.
            return None  # One possibility
            raise FileNotFoundError()  # Alternative
        else:
            return somefunc(latest)  # In my case, somefunc parses the filename

Another option is leave the exception and handle it in the caller code, but I figure it&#39;s more clear to deal with a `FileNotFoundError` than an `IndexError`. Or is it bad form to re-raise an exception with a different name?

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How can I set the column width of a c# winforms `listview` control to auto. Something like width = -1 / -2 ?

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I&#39;m playing about with animations with android. The animations android.R.anim.slide_in_left and android.R.anim.slide_out_right are provided. I&#39;m looking for a way to get the opposite animations i.e:

`android.R.anim.slide_in_right and android.R.anim.slide_out_left`

or how I can specify these myself. 

Android - how to get android.R.anim.slide_in_right

I'm playing about with animations with android. The animations android.R.anim.slide_in_left and android.R.anim.slide_out_right are provided. I'm looking for a way to get the opposite animations i.e:
<code>android.R.anim.slide_in_right and android.R.anim.slide_out_left</code>
or how I can specify these myself.

I am trying to set padding in a `&lt;shape&gt;` declared within an XML file/layout. But whatever I set, nothing changes related to padding. If I modify any other properties, I see the effects on the UI. But it doesn&#39;t work with padding. Could you please advise on the possible reasons for which this might occur?

Here is the XML Shape I am trying to style:

     &lt;shape xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot; 
          android:shape=&quot;rectangle&quot;&gt;

    	&lt;stroke android:width=&quot;1dp&quot; 
                android:color=&quot;#ffffff&quot; 
                android:dashWidth=&quot;2dp&quot;/&gt;

    	&lt;solid android:color=&quot;@color/button_white_cover&quot;/&gt;

    	&lt;corners android:radius=&quot;11dp&quot;/&gt;

    	&lt;padding android:left=&quot;1dp&quot; 
                 android:top=&quot;20dp&quot;
    		     android:right=&quot;20dp&quot; 
                 android:bottom=&quot;2dp&quot;/&gt;
     &lt;/shape&gt;

Padding doesn&#39;t affect &lt;shape&gt; in an XML Layout

How do you get the text of a `TextView` to be Justified (with text flush on the left- and right- hand sides)? 

I found a possible solution [here][1], but it does not work (even if you change vertical-center to center_vertical, etc).


  [1]: http://www.mail-archive.com/android-developers@googlegroups.com/msg41067.html

Android TextView Justify Text

I&#39;m working on an android application, and I have a drawable that I&#39;m loading up from a source image.  On this image, I&#39;d like to convert all of the white pixels to a different color, say blue, and then cache the resultant Drawable object so I can use it later.

So for example say I have a 20x20 PNG file that has a white circle in the middle, and that everything outside the circle is transparent.  What&#39;s the best way to turn that white circle blue and cache the results?  Does the answer change if I want to use that source image to create several new Drawables (say blue, red, green, orange, etc)?

I&#39;m guessing that I&#39;ll want to use a ColorMatrix in some way, but I&#39;m not sure how.

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I created a video recording application with library dialog. The library dialog displays the list of recorded videos where each item consists of icon, video title, tags and location information the following way:

![alt text][1]


Does anyone know whether it is possible to replace icons with video thumbnails (single frame preview)?

Thanks!


  [1]: http://i.stack.imgur.com/ZGm3B.png

Android: Is it possible to display video thumbnails?

I have created an Android project and added an external JAR (hessian-4.0.1.jar) to my project. I then added the JAR to the build path and checked it off in Order and Export.

Order and Export is ignored it seems, and all classes from the external JAR are missing at runtime.

Is there a trick to properly include the needed classes from an external JAR when building an Android application using the Eclipse plugin? I do not want to use ant or Maven.

How can I use external JARs in an Android project?

I want to show a custom animation when pushing a view controller: I would like to achieve something like an &quot;expand&quot; animation, that means the new view expands from a given rectangle, lets say [100,100 220,380] during the animation to full screen.

Any suggestions where to start, respectively any documents, tutorials, links? :)

---

Alright. I could make the expand animation with the following code:

    if ([coming.view superview] == nil)   
        [self.view addSubview:coming.view];
        coming.view.frame = CGRectMake(160,160,0,0);
        [UIView beginAnimations:@&quot;frame&quot; context:nil];
        [UIView setAnimationDuration:4];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
        [coming viewWillAppear:YES];
        [going viewWillAppear:YES];
        coming.view.frame = CGRectMake(0, 0, 320, 480);
        [going viewDidDisappear:YES];
        [coming viewDidAppear:YES];
        [UIView commitAnimations];

My View is properly displayed, but unfortunately the navigation bar is not updated. Is there a way to do that manually?

---

In the sample code, a function is called all 0.03 seconds that updates the transformation of the view.
Unfortunately, when pushing a `UIViewController`, I am not able to resize the frame of the view ...  am I ?

Custom Animation for Pushing a UIViewController

How can I use `.append()` with effects like `show(&#39;slow&#39;)`

Having effects on `append` doesn&#39;t seem to work at all, and it give the same result as normal `show()`. No transitions, no animations. 

How can I append one div to another, and have a `slideDown` or `show(&#39;slow&#39;)` effect on it?



jQuery using append with effects

I&#39;m using a `RotateAnimation` to rotate an image that I&#39;m using as a custom cyclical spinner in Android.  Here&#39;s my `rotate_indefinitely.xml` file, which I placed in `res/anim/`:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;rotate
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:fromDegrees=&quot;0&quot;
        android:toDegrees=&quot;360&quot;
        android:pivotX=&quot;50%&quot;
        android:pivotY=&quot;50%&quot;
        android:repeatCount=&quot;infinite&quot;
        android:duration=&quot;1200&quot; /&gt;    

When I apply this to my `ImageView` using `AndroidUtils.loadAnimation()`, it works great!  

    spinner.startAnimation( 
        AnimationUtils.loadAnimation(activity, R.anim.rotate_indefinitely) );

The one problem is that the image rotation seems to pause at the top of every cycle.

In other words, the image rotates 360 degrees, pauses briefly, then rotates 360 degrees again, etc.

I suspect that the problem is that the animation is using a default interpolator like `android:iterpolator=&quot;@android:anim/accelerate_interpolator&quot;` (`AccelerateInterpolator`), but I don&#39;t know how to tell it not to interpolate the animation.

How can I turn off interpolation (if that is indeed the problem) to make my animation cycle smoothly?

How to make a smooth image rotation in Android?

I would like to place a &quot;please wait, loading&quot; spinning circle animation on my site. How should I accomplish this using jQuery?

How can I create a &quot;Please Wait, Loading...&quot; animation using jQuery?

I have a navigation based application and I want to change the animation of the push and pop animations. How would I do that?

**Edit 2018**

There have been many answers to this question and it&#39;s been quite awhile now, I have re-chosen the answer to what I believe to be the most relevant now. If there is anyone that thinks otherwise please let me know in comments

Content Type	Original Author	Original Content on Stackoverflow
Question	user130076	View Question on Stackoverflow
Solution 1 - Android	CommonsWare	View Answer on Stackoverflow
Solution 2 - Android	Ashish Anand	View Answer on Stackoverflow
Solution 3 - Android	emidander	View Answer on Stackoverflow

Android - how to get android.R.anim.slide_in_right

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

C# ListView Column Width Auto

Raise exception vs. return None in functions?

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