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POWhat's the proper way to implement an Android widget with dynamically drawn content?
 

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  1. POWhat's the proper way to implement an Android widget with dynamically drawn content?
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    <p>For my first and most awesomest Android project, I want to create a home screen widget which displays one of those <a href="http://www.softpedia.com/progScreenshots/An-Arc-Clock-Screenshot-79251.html" rel="noreferrer">Arc Clocks</a> that all the kids are raving about these days.</p> <p>Based on the limitations of <a href="http://developer.android.com/reference/android/widget/RemoteViews.html" rel="noreferrer">RemoteViews</a>, it looks to me that the appropriate way to get it actually drawn on the screen is to use an <a href="http://developer.android.com/reference/android/widget/ImageView.html" rel="noreferrer">ImageView</a> in the actual layout, then when it is updating, create a <a href="http://developer.android.com/reference/android/graphics/drawable/ShapeDrawable.html" rel="noreferrer">ShapeDrawable</a> or two and draw them onto a newly created <a href="http://developer.android.com/reference/android/graphics/Bitmap.html" rel="noreferrer">Bitmap</a>. Then, set that Bitmap as the source of the ImageView.</p> <p>There is Something about that process that I'm just not grokking, though. The following is the code I tried to use to update the widget. I get nothing drawn on the screen at all. The ImageView has a placeholder image just set by its <code>src</code> property. When I don't run the code to update it to my drawing, the placeholder image stays in place. So, I know this code is doing <em>something</em>, just obviously not the <em>right</em> thing.</p> <pre><code>RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget); Bitmap bitmap = Bitmap.createBitmap(100, 100, Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); ShapeDrawable drawable = new ShapeDrawable(new ArcShape(0, 360)); drawable.getPaint().setColor(0xffff0000); drawable.getPaint().setStrokeWidth(5.0f); drawable.setIntrinsicWidth(100); drawable.setIntrinsicHeight(100); drawable.draw(canvas); views.setImageViewBitmap(R.id.ImageView01, bitmap); appWidgetManager.updateAppWidget(appWidgetId, views); </code></pre> <p>I knew it couldn't be that easy. So, am I even heading in the right direction?</p> <hr> <p><strong>Update</strong></p> <p>Ok, maybe that was too much information. The question I'm really trying to ask is this:</p> <p>If I want to draw shapes on a widget, should I use an ImageView and create a bitmap from my ShapeDrawable or is there more appropriate way to draw into a widget where it is constrained by RemoteViews?</p>
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    1. COAre you saying that the placeholder is still there when trying to draw something over it?
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    2. CONo, the placeholder image goes away. It ends up with nothing visual on the screen. I can, however, hold-click on the widget and remove it still.
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