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What is the proper way to use a custom View with the GridView?


What is the proper way to use a custom View with the GridView?

By : user2954644
Date : November 22 2020, 10:31 AM
wish helps you Bear with me, I am very new to Android dev. I'm trying to make a simple app with 9 cards arranged in a 3x3 grid. To do this, I decided to use the GridView layout along with a custom View for each card. I based it mostly on the GridView guide. , Your error is that you never called super.onDraw(canvas)
code :
   @Override
    public void onDraw(Canvas canvas) {
       super.onDraw(canvas); //<== this line is needed to begin drawing on the canvas
        paint.setColor(Color.RED);
        paint.setStyle(Paint.Style.FILL);
        paint.setStrokeWidth(1);
        canvas.drawRect(0, 0,
                        canvas.getWidth()-1,
                        canvas.getHeight()-1, paint);
    }


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Proper Custom View Construction In Android

Proper Custom View Construction In Android


By : Eduardo Angelim
Date : March 29 2020, 07:55 AM
will be helpful for those in need There is no issue with this approach, as it can be found in classes like NumberPicker. If you use the LayoutInflater.inflate(int, ViewGroup, boolean) method to attach to the root view, you can use Merge optimizations. E.g.
View child = inflater.Inflate(R.layout.ChildView, this, true);
iOS Proper Way To Override initWithFrame With Custom Xib and View?

iOS Proper Way To Override initWithFrame With Custom Xib and View?


By : Jeff smile
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Generally speaking, the best way of handling something like this is to use a class factory method:
code :
+(instancetype)markerDetailView {
    [[[NSBundle mainBundle] loadNibNamed:@"OTGMarkerDetailView" owner:nil options:nil] lastObject];
}
self.detailView = [OTGMarkerDetailView markerDetailView];
+(instancetype)markerDetailView {
    for(OTGMarkerDetailView* view in [[NSBundle mainBundle] loadNibNamed:@"OTGMarkerDetailView" owner:nil options:nil]) {
        if([view isKindOfClass:[OTGMarkerDetailView class]]) {
            return view;
        }
    }

    NSAssert(false, @"Failed to load OTGMarkerDetailView");
    return nil;
}
-(id)initWithCoder:(NSCoder*)aDecoder {
    self = [[self class] markerDetailView];
    // I think this will work to inherit settable properties in IB
    if((self = [super initWithCoder:aDecoder])) {
        // support any additional settable properties in IB
    }
    return self;
}
Android Material View Pager GridView Layout Design not proper

Android Material View Pager GridView Layout Design not proper


By : vishbin
Date : March 29 2020, 07:55 AM
wish help you to fix your issue In case anyone else has this problem in the future like I did: the "correct" way to fix this, as defined here: https://github.com/florent37/MaterialViewPager/issues/179 is to declare the number of columns in your grid when you set the adapter:
adapter = new RecyclerViewMaterialAdapter(new albumadapter(getActivity(), items),NUMBER_OF_COLUMNS);
What is proper MVC structure for embedding a custom view within another view?

What is proper MVC structure for embedding a custom view within another view?


By : user6783676
Date : March 29 2020, 07:55 AM
I wish did fix the issue. There is no silver bullet, so no approach is absolutely right or absolutely wrong. What you describe here is just a view that changes its states. So putting everything in your UIView subclass is completely OK. It also conforms to the KISS principle.
However, as far as I understand, and correct me if I'm wrong, the input of your custom view - the text and the picked value from the picker does not really affects the view itself, but the viewController it's attached to. So you need to pass that input to the hosting viewController. This can be achieved by protocol with a default implementation. So the handling of the input data is written only once, but can be attached to whatever viewController you want.
Proper way to draw custom view?

Proper way to draw custom view?


By : Walter Aranda Junior
Date : March 29 2020, 07:55 AM
may help you . You should override the onMeasure() method which will be called before onDraw().
https://developer.android.com/reference/android/view/View.html#onMeasure(int,%20int)
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