picker

问题 My Application required bluetooth connectivity. And in the first phase I am trying to open up the standard Activity "Bluetooth Device Picker" to help user scan for new device or chose a device from the list. The problem is that I am unable to get any working example for the bluetooth device picker. The task is simple. To start an Activity with Intent "android.bluetooth.devicepicker.action.LAUNCH" And the device picker is opening without any problem. But the device picker requires four extras

问题 I am working on a broader project, but am running into an issue using matplotlibs picker=True and pick_event with a pcolormesh. It works, but is not intuitive as the pick event is only triggered when i click along the edges of the heatmap 'boxes', and it returns the surrounding indices (so if you click a corner 4 indices are returned by the intersection of the 4 boxes at that point). For example, in the following picture when I click near the yellow circle my picker returns indices [5 8] (5

问题 In other React Native and Native Base components I've seen that among the main selectable entry items you can add non-selectable things usually called dividers or separators. I can't see anything of the kind in the Picker components however. I'm implementing something like favourites or recent items sorted at the top of the picker. It would be nice to be able to insert a kind of visible dividing line between the favourite/recent section and the main section. +-----------+ | Ford | | Chevrolet

问题 I'm trying to implement something like a countdown timer that plays an alarm at 0. I want to be able to set the amount of time to wait before the timer goes off and I'm wondering if there's a UI widget or element that provides this kind of selection functionality. Basically, does android have something like the iPhone's selection spinwheel? Or is there some type of timepicker that allows selection of an arbitrary number of hours and minutes? The timepicker widget in android has an unnecessary

问题 I'm looking for a (preferably free) component for Delphi for users to easily select about 100 different colours. I've currently got one as part of DevExpress's editors, but it only has about 20 proper colours to choose, with a bunch of other 'Windows' colours like clHighlight, clBtnFace, etc. It's for regular users, so would like to avoid requiring them to manually select RGB values. Something similar to the colour picker in MS Paint might work, or something that lists X11/web colours: http:/

问题 I'm looking for a (preferably free) component for Delphi for users to easily select about 100 different colours. I've currently got one as part of DevExpress's editors, but it only has about 20 proper colours to choose, with a bunch of other 'Windows' colours like clHighlight, clBtnFace, etc. It's for regular users, so would like to avoid requiring them to manually select RGB values. Something similar to the colour picker in MS Paint might work, or something that lists X11/web colours: http:/

问题 I'm looking for a (preferably free) component for Delphi for users to easily select about 100 different colours. I've currently got one as part of DevExpress's editors, but it only has about 20 proper colours to choose, with a bunch of other 'Windows' colours like clHighlight, clBtnFace, etc. It's for regular users, so would like to avoid requiring them to manually select RGB values. Something similar to the colour picker in MS Paint might work, or something that lists X11/web colours: http:/

问题 I want to use a SeekBar (i.e. old school Java Slider) into a color gradient picker. I have seen some examples like this but they all require making new classes and such. There has got to be a way to modify or override the original classes. Or just replace the background with a gradient. 回答1: I figured it out here is how you do it. You create a standard seekbar in your XML. <SeekBar android:id="@+id/seekbar_font" android:layout_width="fill_parent" android:layout_height="wrap_content" android

问题 So far I can only adjust the size of each PickerColumn manually through code, but I want each of them to adjust automatically according to the contents from the largest PickerRow inside of any of them. This is because I'm working with dynamic PickerColumns whose PickerRows content change according to the previous PickerColumn's selected value. I found out how to scale the whole Picker using the next code: var transformPicker=Ti.UI.create2DMatrix().scale(0.5); var picker = Ti.UI.createPicker({

问题 So far I can only adjust the size of each PickerColumn manually through code, but I want each of them to adjust automatically according to the contents from the largest PickerRow inside of any of them. This is because I'm working with dynamic PickerColumns whose PickerRows content change according to the previous PickerColumn's selected value. I found out how to scale the whole Picker using the next code: var transformPicker=Ti.UI.create2DMatrix().scale(0.5); var picker = Ti.UI.createPicker({