Getting imageview size for Bitmap creation

Question

I am a programmer with a Windows background and I am new to Java and Android stuff.

I want to create a widget (not an app) which displays a chart. After a long research I know I can do this with Canvas, imageviews and Bitmaps. The canvas which I paint on should be the same as the Widget Size.

How do I know the widget size (or imageview size) so that I can supply it to the function?

Bitmap.createBitmap(width_xx, height_yy, Config.ARGB_8888);

Code Snippet:

In the timer run method:

@Override
public void run() {
    Bitmap bitmap = Bitmap.createBitmap(??, ??, Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);

    // Create a new paint
    Paint p = new Paint();
    p.setAntiAlias(true);
    p.setStrokeWidth(1);

    // Draw circle
    // Here I can use the width and height to scale the circle
    canvas.drawCircle(50, 50, 7, p);
    remoteViews.setImageViewBitmap(R.id.imageView, bitmap);

Answer 1

From what I've learnt, you can only calculate widget dimensions on Android 4.1+. When on a lower API, you'll have to use static dimensions. About widget dimensions: App Widget Design Guidelines

int w = DEFAULT_WIDTH, h = DEFAULT_HEIGHT;

if ( Build.VERSION.SDK_INT >= 16 ) {
    Bundle options = appWidgetManager.getAppWidgetOptions(widgetId);

    int maxW = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH);
    int maxH = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT);

    int minW = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH);
    int minH = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT);

    if ( context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE ) {
        w = maxW;
        h = minH;
    } else {
        w = minW;
        h = maxH;
    }
}