Just use an 8-digit color value, e.g. #FFF8F8F6, where the first two characters are the alpha value. FF being fully opaque, and 00 being fully transparent.

android:background=&quot;#00000000&quot;					android:cacheColorHint=&quot;#00000000&quot;

this will make is transparent however, this is to make it a full transparency...

You can try the following code : 

    &lt;gradient android:startColor=&quot;#hex_of_any_color&quot; android:endColor=&quot;#00000&quot;/&gt;



I went through these topics

  - [Generics..? Super T](https://stackoverflow.com/questions/591004/generics-super-t/591011)
  - [Bounding generics with &#39;super&#39; keyword](https://stackoverflow.com/questions/2800369/bounding-generics-with-super-keyword)

However, I still seem to be kind of lost with `super` keyword:

 1. When we declare a collection like that:

        List&lt;? super Number&gt; list = null;
        list.add(new Integer(0)); // this compiles
        list.add(new Object()); // this doesn&#39;t compile

  shouldn&#39;t it be the opposite - we have a list that contains some objects (of unknown type) which are parents of `Number`. So `Object` should fit (since it is the parent of `Number`), and `Integer` shouldn&#39;t. The opposite is the case for some reason.

 2. Provided we have the following code

        static void test(List&lt;? super Number&gt; param) {
          param.add(new Integer(2));
        }

        public static void main(String[] args) {
          List&lt;String&gt; sList = new ArrayList&lt;String&gt;();
          test(sList);            // will never compile, however...
        }

It is impossible to compile the above code (and my sanity suggests that this is the right behaviour), but the basic logic could prove the opposite:

  `String is Object, Object is superclass of Number. So String should work.`

  I know this is crazy but isn&#39;t this the reason why they didn&#39;t allow `&lt;S super T&gt;` constructs? If yes, then why `&lt;? super T&gt;` is allowed?

Could someone help me restore the missing part of this logic chain?







Java generics super keyword

Can anyone, please, explain to me in very simple terms what a &quot;method&quot; is in Python?

The thing is in many Python tutorials for beginners this word is used in such way as if the beginner already knew what a method is in the context of Python. While I am of course familiar with the general meaning of this word, I have no clue what this term means in Python. So, please, explain to me what the &quot;Pythonian&quot; method is all about.

Some very simple example code would be very much appreciated as a picture is worth thousand words.

  

What is a &quot;method&quot; in Python?

I have the following gradient: 

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
        &lt;shape xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;&gt;
            &lt;gradient 
                android:startColor=&quot;#ECECEC&quot;
                android:centerColor=&quot;#F6F6F4&quot;
                android:endColor=&quot;#F8F8F6&quot;
                android:angle=&quot;90&quot;
                android:dither=&quot;true&quot;
             /&gt;
        &lt;/shape&gt;

I want this to be transparent because in my ListView I am setting this as my ListSelector:

    &lt;ListView android:layout_width=&quot;fill_parent&quot;
    				android:layout_height=&quot;fill_parent&quot; xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
    				android:id=&quot;@+id/ARListView&quot; 
    				android:background=&quot;@drawable/transparent_background&quot; 
    				android:cacheColorHint=&quot;#00000000&quot; android:drawSelectorOnTop=&quot;true&quot; 
    				android:listSelector=&quot;@drawable/stocks_selected_gradient&quot;&gt;
    &lt;/ListView&gt;

How to make transparent gradient?

I have the following gradient:
<pre><code class="hljs language-ini">&#x3C;?xml version="1.0" encoding="utf-8"?>
 &#x3C;shape xmlns:android="http://schemas.android.com/apk/res/android">
 &#x3C;gradient 
 android:startColor="#ECECEC"
 android:centerColor="#F6F6F4"
 android:endColor="#F8F8F6"
 android:angle="90"
 android:dither="true"
 />
 &#x3C;/shape>
</code></pre>
I want this to be transparent because in my ListView I am setting this as my ListSelector:
<pre><code class="hljs language-ini">&#x3C;ListView android:layout_width="fill_parent"
				android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"
				android:id="@+id/ARListView" 
				android:background="@drawable/transparent_background" 
				android:cacheColorHint="#00000000" android:drawSelectorOnTop="true" 
				android:listSelector="@drawable/stocks_selected_gradient">
&#x3C;/ListView>
</code></pre>

Let&#39;s say I have loaded an image in a bitmap object like

    Bitmap myBitmap = BitmapFactory.decodeFile(myFile);

Now, what will happen if I load another bitmap like

    myBitmap = BitmapFactory.decodeFile(myFile2);

What happens to the first myBitmap? Does it get Garbage Collected or do I have to manually garbage collect it before loading another bitmap, eg.  `myBitmap.recycle()`?



Also, is there a better way to load large images and display them one after another while recycling on the way?

Android: How does Bitmap recycle() work?

Recalling this [post enumerating several problems of using singletons][1]
and having seen several examples of Android applications using singleton pattern, I wonder if it&#39;s a good idea to use Singletons instead of single instances shared through global application state (subclassing android.os.Application and obtaining it through context.getApplication()).

What advantages/drawbacks would both mechanisms have?

To be honest, I expect the same answer in this post https://stackoverflow.com/questions/2709071/singleton-pattern-with-web-application-not-a-good-idea but applied to Android. Am I correct? What&#39;s different in DalvikVM otherwise?

EDIT: I would like to have opinions on several aspects involved:

- Synchronization
- Reusability
- Testing


  [1]: http://www.antonioshome.net/blog/2006/20060906-1.php

Singletons vs. Application Context in Android?

Can anyone please tell me the LIST OF DATATYPES in SQLITE supporting ANDROID.

I want to confirm about TIME and DATE datatypes.

what are Datatypes in SQLite supporting android

I am getting the current date (in format 12/31/1999 i.e. mm/dd/yyyy) as using the below code:
 

    Textview txtViewData;
    txtViewDate.setText(&quot;Today is &quot; +
            android.text.format.DateFormat.getDateFormat(this).format(new Date()));
	
and I am having another date in format as: 2010-08-25 (i.e. yyyy/mm/dd) ,

so I want to find the difference between date in number of days, how do I find difference in days? 

(In other words, I want to find the difference between **CURRENT DATE - yyyy/mm/dd formatted date**)

Android/Java - Date Difference in days

How can I find out carrier&#39;s name in Android?

How to find out carrier&#39;s name in Android

&gt; **Possible Duplicate:**  
&gt; [Horizontal ListView in Android?](https://stackoverflow.com/questions/3240331/horizontal-listview-in-android)  

&lt;!-- End of automatically inserted text --&gt;

Like many things in Android, you wouldn&#39;t think this would be such a hard problem but ohhh, by golly, would you be wrong.  And, like many things in Android, the API doesn&#39;t even provide a reasonably extensible starting point.  I&#39;ll be damned if I&#39;m going to roll my own ListView, when all I want is to take the thing and turn it on its side.  \rant

Okay, now that I&#39;m done fuming, let&#39;s talk about the problem itself.  What I need is basically something exactly like the `Gallery`, but without the center-locking feature.  I don&#39;t really need `ListView`&#39;s listSelector but it&#39;s a nice-to-have.  Mostly, I could do what I want with a `LinearLayout` inside a `ScrollView`, but I need the child views to come from a `ListAdapter` and I would really like to have a view recycler.  And I _really_ don&#39;t want to write any layout code.

I peeked into the source code for some of these classes...

*Gallery:* It looks like I could use the Gallery if I override most of the &#39;onXyz&#39; methods, copy all their source code, but refrain from calling `scrollIntoSlots()`.  But I&#39;m sure that if I do that I&#39;ll run into some member field that&#39;s inaccessible or some other unforeseen consequence.

*AbsSpinner:* Since the `mRecycler` field is package-private I doubt I&#39;ll be able to extend this class.

*AbsListView:* It looks like this class is only meant for vertical scrolling, so no help there.

*AdapterView:* I&#39;ve never had to extend this class directly.  If you tell me it&#39;s easy to do, and that it&#39;s easy to roll my own `RecycleBin`, I&#39;ll be very skeptical but I&#39;ll give it a shot.

I suppose I could possibly copy _both_ `AbsSpinner` and `Gallery` to get what I want... hopefully those classes aren&#39;t using some package-private variable I can&#39;t access.  Do y&#39;all think that&#39;s a good practice?  Does anyone have any tutorials or third-party solutions that might put me in the right direction?

**Update:**  
The only solution I&#39;ve found so far is to do it all myself.  Since asking this question, I have overridden `AdapterView` and implemented my own &quot;HorizontalListView&quot; from scratch.  The only way to truly override the Gallery&#39;s center-locking feature is to override the private `scrollIntoSlots` method, which I believe would require generating a subclass at runtime.  If you&#39;re bold enough to do that, it&#39;s arguably the best solution, but I don&#39;t want to rely on undocumented methods that could change.

Swathi EP below suggested that I give the `Gallery` an `OnTouchListener` and override the scroll functionality.  If you don&#39;t care about having fling support in your list, or if it&#39;s okay for the views to snap to the center at the end of the fling animation, then this _will_ work for you!  However, in the end it still proves impossible to remove the center-locking feature without removing fling support.  And I ask you, what kind of list doesn&#39;t fling?

So, alas, this did not work for me. :-(  But if you&#39;re interested in this approach, read on...

I also had to make some additions to Swathi&#39;s code to get what I wanted.  In `GestureListener.onTouch`, in addition to delegating to the gesture detector, I also had to return true for `ACTION_UP` and `ACTION_CANCEL` events.  That successfully disabled the center-locking feature, but it also disabled flinging.  I was able to re-enable fling by having my own GestureListener delegate to the Gallery&#39;s `onFling` method.  If you want to try it out, go into your ApiDemos sample code and replace the Gallery1.java class with the following code:

	import com.example.android.apis.R;
	
	import android.app.Activity;
	import android.content.Context;
	import android.content.res.TypedArray;
	import android.os.Bundle;
	import android.view.ContextMenu;
	import android.view.GestureDetector;
	import android.view.MenuItem;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.ContextMenu.ContextMenuInfo;
	import android.view.GestureDetector.SimpleOnGestureListener;
	import android.view.View.OnTouchListener;
	import android.widget.AdapterView;
	import android.widget.BaseAdapter;
	import android.widget.Gallery;
	import android.widget.ImageView;
	import android.widget.Toast;
	import android.widget.AdapterView.AdapterContextMenuInfo;
	import android.widget.AdapterView.OnItemClickListener;
	
	public class Gallery1 extends Activity {
		
		@Override
		public void onCreate(Bundle savedInstanceState) {
			super.onCreate(savedInstanceState);
			setContentView(R.layout.gallery_1);
			
			// Reference the Gallery view
			final Gallery g = (Gallery) findViewById(R.id.gallery);
			
			// Set the adapter to our custom adapter (below)
			g.setAdapter(new ImageAdapter(this));
			
			// Set a item click listener, and just Toast the clicked position
			g.setOnItemClickListener(new OnItemClickListener() {
				public void onItemClick(AdapterView parent, View v, int position, long id) {
					Toast.makeText(Gallery1.this, &quot;&quot; + position, Toast.LENGTH_SHORT).show();
				}
			});
			
			// Gesture detection
			final GestureDetector gestureDetector = new GestureDetector(new MyGestureDetector(g));
			OnTouchListener gestureListener = new OnTouchListener() {
				@Override
				public boolean onTouch(View v, MotionEvent event) {
					boolean retVal = gestureDetector.onTouchEvent(event);
					int action = event.getAction();
					if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) {
						retVal = true;
						onUp();
					}
					return retVal;
				}
				
				public void onUp() {
					// Here I am merely copying the Gallery&#39;s onUp() method.
					for (int i = g.getChildCount() - 1; i &gt;= 0; i--) {
						g.getChildAt(i).setPressed(false);
					}
					g.setPressed(false);
				}
			};
			g.setOnTouchListener(gestureListener);
			
			// We also want to show context menu for longpressed items in the gallery
			registerForContextMenu(g);
		}
		
		@Override
		public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
			menu.add(R.string.gallery_2_text);
		}
		
		@Override
		public boolean onContextItemSelected(MenuItem item) {
			AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
			Toast.makeText(this, &quot;Longpress: &quot; + info.position, Toast.LENGTH_SHORT).show();
			return true;
		}
		
		public class ImageAdapter extends BaseAdapter {
			int mGalleryItemBackground;
			
			public ImageAdapter(Context c) {
				mContext = c;
				// See res/values/attrs.xml for the &lt;declare-styleable&gt; that defines
				// Gallery1.
				TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
				mGalleryItemBackground = a.getResourceId(
						R.styleable.Gallery1_android_galleryItemBackground, 0);
				a.recycle();
			}
			
			public int getCount() {
				return mImageIds.length;
			}
			
			public Object getItem(int position) {
				return position;
			}
			
			public long getItemId(int position) {
				return position;
			}
			
			public View getView(int position, View convertView, ViewGroup parent) {
				ImageView i = new ImageView(mContext);
				
				i.setImageResource(mImageIds[position]);
				i.setScaleType(ImageView.ScaleType.FIT_XY);
				i.setLayoutParams(new Gallery.LayoutParams(136, 88));
				
				// The preferred Gallery item background
				i.setBackgroundResource(mGalleryItemBackground);
				
				return i;
			}
			
			private Context mContext;
			
			private Integer[] mImageIds = {
					R.drawable.gallery_photo_1,
					R.drawable.gallery_photo_2,
					R.drawable.gallery_photo_3,
					R.drawable.gallery_photo_4,
					R.drawable.gallery_photo_5,
					R.drawable.gallery_photo_6,
					R.drawable.gallery_photo_7,
					R.drawable.gallery_photo_8
			};
		}
		
		public class MyGestureDetector extends SimpleOnGestureListener {
			
			private Gallery gallery;
			
			public MyGestureDetector(Gallery gallery) {
				this.gallery = gallery;
			}
			
			@Override
			public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, 
					float velocityY) {
				return gallery.onFling(e1, e2, velocityX, velocityY);
			}
		}
		
	}

How can I make a horizontal ListView in Android?

In iOS, there is a very easy and powerful facility to animate the addition and removal of UITableView rows, [here&#39;s a clip from a youtube video][1] showing the default animation.  Note how the surrounding rows collapse onto the deleted row.  This animation helps users keep track of what changed in a list and where in the list they were looking at when the data changed.

Since I&#39;ve been developing on Android I&#39;ve found no equivalent facility to animate individual rows in a [TableView][2].  Calling [`notifyDataSetChanged()`][3] on my Adapter causes the ListView to immediately update its content with new information.  I&#39;d like to show a simple animation of a new row pushing in or sliding out when the data changes, but I can&#39;t find any documented way to do this.  It looks like [LayoutAnimationController][4] might hold a key to getting this to work, but when I set a LayoutAnimationController on my ListView (similar to [ApiDemo&#39;s LayoutAnimation2][5]) and remove elements from my adapter after the list has displayed, the elements disappear immediately instead of getting animated out.

I&#39;ve also tried things like the following to animate an individual item when it is removed:

    @Override
    protected void onListItemClick(ListView l, View v, final int position, long id) {
    	Animation animation = new ScaleAnimation(1, 1, 1, 0);
    	animation.setDuration(100);
        getListView().getChildAt(position).startAnimation(animation);
        l.postDelayed(new Runnable() {
        	public void run() {
            	mStringList.remove(position);
            	mAdapter.notifyDataSetChanged();
        	}
        }, 100);
    }

However, the rows surrounding the animated row don&#39;t move position until they jump to their new positions when `notifyDataSetChanged()` is called.  It appears ListView doesn&#39;t update its layout once its elements have been placed.

While writing my own implementation/fork of ListView has crossed my mind, this seems like something that shouldn&#39;t be so difficult.

Thanks!


  [1]: http://www.youtube.com/watch?v=VhSWE6_ieyA#t=1m10s
  [2]: http://developer.android.com/reference/android/widget/ListView.html
  [3]: http://developer.android.com/reference/android/widget/BaseAdapter.html#notifyDataSetChanged()
  [4]: http://LayoutAnimationController
  [5]: http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/view/LayoutAnimation2.html

How to Animate Addition or Removal of Android ListView Rows

I have this code:

    &lt;ListView
         android:layout_width=&quot;wrap_content&quot;
         android:layout_height=&quot;wrap_content&quot;
         android:id=&quot;@+id/cashItemsList&quot;
         android:cacheColorHint=&quot;#00000000&quot;
         android:divider=&quot;@drawable/list_divider&quot;&gt;&lt;/ListView&gt;
    
where `@drawable/list_divider` is:
    
    &lt;shape
     xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
     android:shape=&quot;line&quot;&gt;
     &lt;stroke
       android:width=&quot;1dp&quot;
       android:color=&quot;#8F8F8F&quot;
       android:dashWidth=&quot;1dp&quot;
       android:dashGap=&quot;1dp&quot; /&gt;
    &lt;/shape&gt;

but I can&#39;t see any divider.


Android ListView Divider

For part of my app, the user is presented with a list of names and is asked to group them as they see fit. 

(Note, the ListView code was copied verbatim from the Android Views tutorial.  I haven&#39;t yet customized it to my needs, I&#39;m just trying to figure out how to make this work.)

The basic layout is a LinearLayout, containing a ScrollView (called &quot;groupsScrollView&quot; in the code below), containing a RelativeLayout.  I have some buttons and text, and then my ListView beneath that, which displays the list of names.  All this is taller than the visible screen area, so the user is allowed to scroll vertically to see it all.

This all works beautifully, except when the page loads it is always pre-scrolled to the top of my ListView - in the middle of the page.  The text and buttons I&#39;ve created that tell the user what to do are not visible.  

I can grab the screen and scroll up, that works just fine, but I&#39;d like the screen to load having already been scrolled to the top.  The user shouldn&#39;t have to scroll UP to see the top of a freshly loaded page.  But everything I&#39;ve tried to programmatically scroll to the top of the screen has failed.

Here&#39;s my onCreate method:

    protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);
		
		setContentView(R.layout.groups);

		mainScrollView = (ScrollView)findViewById(R.id.groupsScrollView);
		
		//get the Bundle out of the Intent...
        Bundle extras = getIntent().getExtras();
        mNames = extras.getStringArray(&quot;mNames&quot;);
		
		setListAdapter(new ArrayAdapter&lt;String&gt;(this, R.layout.list_item, mNames));

		ListView lv = getListView();
		lv.setTextFilterEnabled(true);

        //This is the line I&#39;m having issues with
		mainScrollView.pageScroll(View.FOCUS_UP);
		
		lv.setOnItemClickListener(new OnItemClickListener() {
		    public void onItemClick(AdapterView&lt;?&gt; parent, View view,
		        int position, long id) {
		      // When clicked, show a toast with the TextView text
		      Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
		          Toast.LENGTH_SHORT).show();
		    }
		  });
	}

The line &quot;mainScrollView.pageScroll(View.FOCUS_UP); is the problem.  It doesn&#39;t cause an error, but it doesn&#39;t seem to do anything.  I&#39;ve tried scrollTo(0,0), scrollDirection(View.FOCUS_UP), and everything else I can think of.  

Since I don&#39;t get an error I have to assume that these scroll commands are actually working, but that they&#39;re scrolling to the top of the ListView, rather than the top of the ScrollView or RelativeLayout that contains it.  This seems to be confirmed by Google&#39;s own description of the scrollTo(int x, int y) method where they say &quot;This version also clamps the scrolling to the bounds of our child.&quot;.  

So to make a long question even longer, how do I load a bunch of views on the screen contained within a ScrollView, and then programmatically scroll the whole thing to the top of the page so the user can interact with it?

Thanks!

How to scroll to top of long ScrollView layout?

My book, &quot;Hello Android&quot; gives this as a way of using a custom db helper, setting up a cursor, and then setting up an adapter as follows:

    Cursor cursor
    CustomDatabaseHelper test = new CustomDatabaseHelper(this);
    try {
            cursor = getData();
            showData(cursor);
    } finally {
            test.close();
    }

With this however, everytime I need to refresh the data set, I need to keep running this block of code (which gets a bit difficult inside an onClick() for a button due to &quot;this&quot; not being available.

Is this the best way to refresh the data set, or should I look towards removing the .close and issue an adapter.notifyDataSetChanged()? If I do this, sometimes I get a force close as (and I can&#39;t remember at the moment) but sometimes it cannot Delete properly - I think this may be because the database is currently open and it tries to open again.

Should we also be declaring the variables for the Cursors, DatabaseHelpers and Adapter in the Class (outside of the OnCreate) so that they are accessible to all the functions?

I realise this is just poor programming at this stage, but Im trying to get some pointers as to the best way of doing things.

Best Way to Refresh Adapter/ListView on Android

I&#39;m creating what should be a very simple Win32 C++ app whose sole purpose it to ONLY display a semi-transparent PNG. The window shouldn&#39;t have any chrome, and all the opacity should be controlled in the PNG itself.

My problem is that the window doesn&#39;t repaint when the content under the window changes, so the transparent areas of the PNG are &quot;stuck&quot; with what was under the window when the application was initially started.

Here&#39;s the line where I setup the new window:

    hWnd = CreateWindowEx(WS_EX_TOPMOST, szWindowClass, szTitle, WS_POPUP, 0, height/2 - 20, 40, 102, NULL, NULL, hInstance, 0);

For the call to RegisterClassEx, I have this set for the background:

    wcex.hbrBackground = (HBRUSH)0;

Here is my handler for WM_PAINT message:

     case WM_PAINT:
     {
       hdc = BeginPaint(hWnd, &amp;ps);
       Gdiplus::Graphics graphics(hdc);
       graphics.DrawImage(*m_pBitmap, 0, 0);
       EndPaint(hWnd, &amp;ps);
       break;
     }

One thing to note is that the application is always docked to the left of the screen and doesn&#39;t move. But, what&#39;s underneath the application may change as the user opens, closes or moves windows under it.

When the application first starts, it looks perfect. The transparent (and simi-transparent) parts of the PNG show through perfectly. BUT, when the background underneath the application changes, the background DOESN&#39;T update, it just stays the same from when the application first started. In fact, WM_PAINT (or WM_ERASEBKGND does not get called when the background changes).

I&#39;ve been playing with this for quite a while and have gotten close to getting 100% right, but not quite there. For instance, I&#39;ve tried setting the background to (HBRUSH) NULL_BRUSH and I&#39;ve tried handling WM_ERASEBKGND.

What can be done to get the window to repaint when the contents under it changes?


    

Creating a transparent window in C++ Win32

Rendering contexts usually have a solid color on the background (black or whatever, see the image below):

![alt text][1]

I&#39;m wondering if it&#39;s possible to setup a window, with no decorations AND with the transparent background, while allowing me to render OpenGL stuff on it.

This would give the illusion that the triangle is floating on the screen. The transparent background should allow you to see the desktop or other applications that might be behind it.

Could you please exemplify with source code?

Platform: Windows (win32 only)

  [1]: http://i.stack.imgur.com/YxAXx.gif

How to make an OpenGL rendering context with transparent background?

I was wondering how to change or modify the transparency of a Panel in C#, not the whole form, but the panel only.. I&#39;ve seen many C# tutorials on Opacity, but its for the Form. im looking for how it could be possible with the Panel only. Thank You!

How can I set the opacity or transparency of a Panel in WinForms?

I&#39;m struggling to create a WebView with transparent background.

    webView.setBackgroundColor(0x00FFFFFF);
    webView.setBackgroundDrawable(myDrawable);

Then I load a html page with 

    &lt;body style=&quot;background-color:transparent;&quot; ...

The background color of the WebView is transparent but as soon as the page is loaded, it&#39;s overwritten by a black background from the html page. This only happens on android 2.2, it works on android 2.1.

So is there something to add in the html page code to make it really transparent ?		

Android WebView style background-color:transparent ignored on android 2.2

I am using a linear layout and frame layout. In the linear layout I keep an image as background and in the frame layout I keep an imageView. In that imageView I give an image.

Now I want to make the second image (that is in the imageView) transparent. How can I do this?


How can I make an image transparent on Android?

Does anyone know the vendor prefix for gradients within IE9 or are we still supposed to still be using their proprietry filters?

What I&#39;ve got for the other browsers is:

    background-image: -moz-linear-gradient(top, #444444, #999999); /* FF3.6 */
    background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #444444),color-stop(1, #999999)); /* Saf4+, Chrome */
    filter:  progid:DXImageTransform.Microsoft.gradient(startColorStr=&#39;#444444&#39;, EndColorStr=&#39;#999999&#39;); /* IE6,IE7 */
    -ms-filter: &quot;progid:DXImageTransform.Microsoft.gradient(startColorStr=&#39;#444444&#39;, EndColorStr=&#39;#999999&#39;)&quot;; /* IE8 */

As a bonus does anyone know Opera&#39;s vendor prefix as well?


Gradients in Internet Explorer 9

Is it possible to add noise to a gradient in CSS?

Here is my code for a radial gradient:

    body {
        color: #575757;
        font: 14px/21px Arial, Helvetica, sans-serif;
        background-color: #2f3b4b;
        background: -moz-radial-gradient(center 45deg, circle closest-corner, #2f3b4b 0%, #3e4f63 100%);
        background: -webkit-gradient(radial, center center, 10, center center, 900, from(#2f3b4b), to(#3e4f63));
    }

What would I add to that to have noise on top of it, to give it texture?


Can you add noise to a CSS3 gradient?

I&#39;d like to create a shape that&#39;s like the following image:

![alt text][1]


  [1]: http://i.stack.imgur.com/hM2v2.png

Notice the top half gradients from color 1 to color 2, but theres a bottom half that gradients from color 3 to color 4.  I know how to make a shape with a single gradient, but I&#39;m not sure how to split a shape into two halves and make 1 shape with 2 different gradients.

Any ideas?

Multi-gradient shapes

IE9 is apparently able to handle rounded corners by using the CSS3 standard definition of `border-radius`. 

What about support for border radius *and* background gradient? Yes IE9 is to support them both separately, but if you mix the two the gradient bleeds out of the rounded corner. 

I am also seeing strangeness with shadows showing as a solid black line under a box with rounded corners.

Here are the images shown in IE9:

![image with no bleed, but sharp corners][1] ![image with bleed][2]

How can I work around this problem?

  [1]: http://i.stack.imgur.com/lCBe6.png
  [2]: http://i.stack.imgur.com/BbZ0D.png
  [3]: http://microsoft.com/internetexplorer

IE9 border-radius and background gradient bleeding

I am having trouble applying a gradient background to a LinearLayout.

This should be relatively simple from what I have read but it just doesn&#39;t seem to work. For reference sakes I am developing on 2.1-update1.

header_bg.xml:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;shape xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
    	android:shape=&quot;rectangle&quot;&gt;
    	&lt;gradient
            android:angle=&quot;90&quot;
            android:startColor=&quot;#FFFF0000&quot;
            android:endColor=&quot;#FF00FF00&quot;
            android:type=&quot;linear&quot;/&gt;
    &lt;/shape&gt;

main_header.xml:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;LinearLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
    	android:layout_width=&quot;fill_parent&quot;
    	android:layout_height=&quot;50dip&quot;
    	android:orientation=&quot;horizontal&quot;
    	android:background=&quot;@drawable/header_bg&quot;&gt;
    &lt;/LinearLayout&gt;

If I change @drawable/header_bg to a color - e.g. #FF0000 it works perfectly fine. Am I missing something obvious here?

Content Type	Original Author	Original Content on Stackoverflow
Question	Sheehan Alam	View Question on Stackoverflow
Solution 1 - Android	Kevin Coppock	View Answer on Stackoverflow
Solution 2 - Android	CadTech	View Answer on Stackoverflow
Solution 3 - Android	Pranav Prakasan	View Answer on Stackoverflow

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