To declare different layouts and bitmaps you&#39;d like to use for the different screens, you must place these alternative resources in separate directories/folders.

This means that if you generate a `200x200` image for `xhdpi` devices, you should generate the same resource in `150x150` for `hdpi`, `100x100` for `mdpi`, and `75x75` for `ldpi` devices.

Then, place the files in the appropriate drawable resource directory:

    MyProject/
        res/
            drawable-xhdpi/
                awesomeimage.png
            drawable-hdpi/
                awesomeimage.png
            drawable-mdpi/
                awesomeimage.png
            drawable-ldpi/
                awesomeimage.png

Any time you reference `@drawable/awesomeimage`, the system selects the appropriate bitmap based on the screen&#39;s density.


I got one good solution. Here I have attached it as the image below. So try it. It may be helpful to you...!


![Enter image description here][1]

  [1]: http://i.stack.imgur.com/cCN3r.jpg


I have a stored procedure that has a bunch of input and output parameters because it is Inserting values to multiple tables.  In some cases the stored proc only inserts to a single table (depending on the input parameters).  Here is a mocked up scenario to illustrate.

Tables / Data Objects:

**Person**

    Id
    Name
    Address

**Name**

    Id
    FirstName
    LastName

**Address**

    Id
    Country
    City

Say I have a stored procedure that inserts a person. If the address doesn&#39;t exist I won&#39;t add it to the `Address` table in the database.  

Thus when I generate the code to call the stored procedure I don&#39;t want to bother adding the `Address` parameter. For `INPUT` parameters this is ok because SQL Server allows me to supply default values. But for the `OUTPUT` parameter what do I do in the stored procedure to make it optional so I do not receive an error...

&gt; *Procedure or function &#39;Person_InsertPerson&#39; expects parameter
&gt; &#39;@AddressId&#39;, which was not supplied.*

Can I have an optional OUTPUT parameter in a stored procedure?

One of the benefits of XML is being able to validate a document against an XSD. YAML doesn&#39;t have this feature, so how can I validate that the YAML document I open is in the format expected by my application?

Validating a yaml document in python

I was working on Android 1.5, but I have now moved to the latest version. So there is only one &quot;drawable&quot; folder in Android 1.5, but now there are three different folders for storing images in the Android project.

And I have found some articles for these three folders that says

 1. hdpi means High-dpi 
 2. mdpi means medium-dpi 
 3. ldpi means low-dpi

But what is the exact purpose of these three folders and when should I use a particular folder to store images in?


Drawable-hdpi, Drawable-mdpi, Drawable-ldpi Android

I was working on Android 1.5, but I have now moved to the latest version. So there is only one "drawable" folder in Android 1.5, but now there are three different folders for storing images in the Android project.
And I have found some articles for these three folders that says
<ol>
<li>hdpi means High-dpi</li>
<li>mdpi means medium-dpi</li>
<li>ldpi means low-dpi</li>
</ol>
But what is the exact purpose of these three folders and when should I use a particular folder to store images in?

How can I set a border for an `ImageView` and change its color in Android?

Border for an Image view in Android?

I can&#39;t figure out why I&#39;m not able to play the video in my VideoView. All I&#39;m getting for a message is:

&gt; Cannot Play Video : Sorry, this video cannot be played. 

I created an SD card for my emulator as well. Do I need to place my SD card in a particular folder in my SDK? Please comment. 

Here&#39;s the layout: 

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;LinearLayout 
       android:id=&quot;@+id/LinearLayout01&quot;
       android:layout_height=&quot;fill_parent&quot;     
       android:paddingLeft=&quot;2px&quot;
       android:paddingRight=&quot;2px&quot;
       xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
       android:paddingTop=&quot;2px&quot;
       android:paddingBottom=&quot;2px&quot;
       android:layout_width=&quot;fill_parent&quot;
       android:orientation=&quot;vertical&quot;&gt;
    
          &lt;VideoView 
             android:layout_height=&quot;fill_parent&quot;
             android:layout_width=&quot;fill_parent&quot; 
             android:id=&quot;@+id/VideoView&quot; /&gt;
    
    &lt;/LinearLayout&gt;

Here&#39;s the code:

    package com.examples.videoviewdemo;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.widget.MediaController;
    import android.widget.VideoView;
    
    public class VideoViewDemo extends Activity {
        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            
            VideoView videoView = (VideoView)findViewById(R.id.VideoView);
            //MediaController mediaController = new MediaController(this);
            // mediaController.setAnchorView(videoView);
            //videoView.setMediaController(mediaController);
           
            videoView.setVideoPath(&quot;/sdcard/blonde_secretary.3gp&quot;);
          
            videoView.start();  
        }
    }

Waiting for the reply...

Playing a video in VideoView in Android

What is the difference between Service, Async Task &amp; Thread. If i am not wrong all of them are used to do some stuff in background. So, how to decide which to use and when?

Difference between Service, Async Task &amp; Thread?

First of all: yes, I read all the other threads on this topic. And not only those from this site... (you see, I&#39;m a little frustrated)

Most of them come with the advice to use `android:id` instead of just `id` in the XML file. I did.

From others, I learned, that `View.findViewById` works different than `Activity.findViewById`. I handled that, too.

In my `location_layout.xml`, I use:

    &lt;FrameLayout .... &gt;
        &lt;some.package.MyCustomView ... /&gt;

        &lt;LinearLayout ... &gt;
            &lt;TextView ...
                android:id=&quot;@+id/txtLat&quot; /&gt;
            ...
        &lt;/LinearLayout&gt;
    &lt;/FrameLayout&gt;

In my Activity I do:
    
    ...
    setContentView( R.layout.location_layout );


and in my custom view class:

    ... 
    TextView tv = (TextView) findViewById( R.id.txtLat );


which returns `null`. **Doing this, my Activity works fine.** So maybe it&#39;s because of the `Activity.findViewById` and `View.findViewById` differences. So I stored the context passed to the customs view constructor locally and tried:

    ...
    TextView tv = (TextView) ((Activity) context).findViewById( R.id.txtLat );

which also returned `null`.

Then, I changed my custom view to extend `ViewGroup` instead `View` and changed the `location_layout.xml` to let the `TextView` be a direct child of my custom view, so that the `View.findViewById` should work as supposed. Suprise: it didn&#39;t solve anything.

So what the heck am I doing wrong? 

I&#39;ll appreciate any comments.

findViewByID returns null

If I have an apk can I remove the current signing and some how re-sign it with a different .keystore file and still have the application install?


**Update**: I managed to get it to work with Jorgesys&#39; solution and where I messed up before was that I unzipped the .apk then rezipped it after removing the META-INF folder and changed the file extension back into .apk. What I should have done is simply opened it with winzip and delete the folder inside of winzip.

Can I re-sign an .apk with a different certificate than what it came with?

how to add background image to activity?

I have a large bitmap (say 3888x2592) in a file. Now, I want to resize that bitmap to 800x533 and save it to another file.
I normally would scale the bitmap by calling `Bitmap.createBitmap` method but it needs a source bitmap as the first argument, which I can&#39;t provide because loading the original image into a Bitmap object would of course exceed the memory (see [here][1], for example).

I also can&#39;t read the bitmap with, for example, `BitmapFactory.decodeFile(file, options)`, providing a `BitmapFactory.Options.inSampleSize`, because I want to resize it to an exact width and height. Using `inSampleSize` would resize the bitmap to 972x648 (if I use `inSampleSize=4`) or to 778x518 (if I use `inSampleSize=5`, which isn&#39;t even a power of 2).

I would also like to avoid reading the image using inSampleSize with, for example, 972x648 in a first step and then resizing it to exactly 800x533 in a second step, because the quality would be poor compared to a direct resizing of the original image.

To sum up my question:
Is there a way to read a large image file with 10MP or more and save it to a new image file, resized to a specific new width and height, without getting an OutOfMemory exception?

I also tried `BitmapFactory.decodeFile(file, options)` and setting the Options.outHeight and Options.outWidth values manually to 800 and 533, but it doesn&#39;t work that way.


  [1]: https://stackoverflow.com/questions/477572/android-strange-out-of-memory-issue

Resize a large bitmap file to scaled output file on Android

Facebook graph API tells me I can get a profile picture of a user using

http://graph.facebook.com/517267866/picture?type=large

which works fine. However, when you type above URL into a browser, the actual address of the image is

http://profile.ak.fbcdn.net/profile-ak-snc1/v227/560/83/n517267866_1928.jpg

How can I get the second URL using the first one programmatically?

Getting the &quot;real&quot; Facebook profile picture URL from graph API

I was wondering if in the width and height `&lt;img&gt;` attributes, I could specify width and height as percentages?

Well, I guess that is obvious, because when I try so, it resizes, but it appears to skew the quality of my image.

Here is an example of my markup with fixed attributes:

    &lt;img src=&quot;#&quot; width=&quot;346&quot; height=&quot;413&quot;&gt;

Now, while trying to scale this down, say by half, via percentages:

    &lt;img src=&quot;#&quot; width=&quot;50%&quot; height=&quot;50%&quot;&gt;

I get something completely different than:

    &lt;img src=&quot;#&quot; width=&quot;173&quot; height=&quot;206.5&quot;&gt;

I think I&#39;m just fundamentally mistaking my percentage markup or something because there is a noticeable difference between my second and third example visually.

Specifying width and height as percentages without skewing photo proportions in HTML


I have a BufferedImage I&#39;m trying to write to a jpeg file, but my Java program throws an exception. I&#39;m able to successfully save the same buffer to a gif and png. I&#39;ve tried looking around on Google for solutions, but to no avail.

Code:

	   File outputfile = new File(&quot;tiles/&quot; + row + &quot;:&quot; + col + &quot;.jpg&quot;);
	   try {
		   ImageIO.write(mapBufferTiles[row][col], &quot;jpg&quot;, outputfile);
	   } catch (IOException e) {
		   	outputfile.delete();
	   		throw new RuntimeException(e);
	   }


Exception:


	 Exception in thread &quot;main&quot; java.lang.RuntimeException: javax.imageio.IIOException: Invalid argument to native writeImage
	 at MapServer.initMapBuffer(MapServer.java:90)
	 at MapServer.&lt;init&gt;(MapServer.java:24)
	 at MapServer.main(MapServer.java:118)
	 Caused by: javax.imageio.IIOException: Invalid argument to native writeImage
	 at com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeImage(Native Method)
	 at com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeOnThread(JPEGImageWriter.java:1055)
	 at com.sun.imageio.plugins.jpeg.JPEGImageWriter.write(JPEGImageWriter.java:357)
	 at javax.imageio.ImageWriter.write(ImageWriter.java:615)
	 at javax.imageio.ImageIO.doWrite(ImageIO.java:1602)
	 at javax.imageio.ImageIO.write(ImageIO.java:1526)
	 at MapServer.initMapBuffer(MapServer.java:87)
	 ... 2 more


Content Type	Original Author	Original Content on Stackoverflow
Question	Paresh Mayani	View Question on Stackoverflow
Solution 1 - Android	Neha Mangla	View Answer on Stackoverflow
Solution 2 - Android	jigar	View Answer on Stackoverflow

Drawable-hdpi, Drawable-mdpi, Drawable-ldpi Android

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Validating a yaml document in python

Can I have an optional OUTPUT parameter in a stored procedure?

Attributions