onkeydown

问题 When I press one of the volume hardware buttons, Android's system is shown a depicted. Naturally this also happens when I press whithin my app. Is it possible to configure the style of these Android system stuff like volume? Or at least when I open these system stuff in my app? EDIT: As recommended in the comments, I've overwritten onKeyDown , but the adjustStreamVolume switches between 0 and 1 only. override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean { when (event?.keyCode) {

问题 When I press one of the volume hardware buttons, Android's system is shown a depicted. Naturally this also happens when I press whithin my app. Is it possible to configure the style of these Android system stuff like volume? Or at least when I open these system stuff in my app? EDIT: As recommended in the comments, I've overwritten onKeyDown , but the adjustStreamVolume switches between 0 and 1 only. override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean { when (event?.keyCode) {

问题 When I press one of the volume hardware buttons, Android's system is shown a depicted. Naturally this also happens when I press whithin my app. Is it possible to configure the style of these Android system stuff like volume? Or at least when I open these system stuff in my app? EDIT: As recommended in the comments, I've overwritten onKeyDown , but the adjustStreamVolume switches between 0 and 1 only. override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean { when (event?.keyCode) {

问题 I am using a 'keydown' event to replace specific characters typed in an input textbox. When I use: document.getElementById('inputText').onkeydown = handleInputTextKeydown; or the JQuery equivalent: $('#inputText').on('keydown',handleInputTextKeydown); I get the expected result - e.g. the keypress Shift+i displays as 'í'. However if I use addEventListner as the keydown hook: var tb = document.getElementById('inputText'); tb.addEventListener('keydown', handleInputTextKeydown, false); the input

问题 I have a DragCanvas class that inherits from Canvas and that implements functionality in order to grab, drag and resize elements. The DragCanvas class is very similar to the one provided by Josh Smith in the following article: http://www.codeproject.com/Articles/15354/Dragging-Elements-in-a-Canvas I'd like to be able to capture keyboard events as well in order to delete elements and duplicate them. I have overriden the OnKeydown and OnPreviewKeyDown methods and placed breakpoints in there,

问题 I've just upgraded my app to use the newly released v22.1.0 AppCompat and now onKeyDown and onKeyUp are not triggered when menu key is pressed. The other keys correctly trigger onKeyDown and onKeyUp , but when i press the menu key nothing happens. If I downgrade to v22.0.0 everything returns to work properly. How do I fix it? 回答1: Update 23 August This has been fixed again in the v23.0.0 of appcompat-v7 support library. Update to the last version to see this fixed. Update 19 July

问题 I've just upgraded my app to use the newly released v22.1.0 AppCompat and now onKeyDown and onKeyUp are not triggered when menu key is pressed. The other keys correctly trigger onKeyDown and onKeyUp , but when i press the menu key nothing happens. If I downgrade to v22.0.0 everything returns to work properly. How do I fix it? 回答1: Update 23 August This has been fixed again in the v23.0.0 of appcompat-v7 support library. Update to the last version to see this fixed. Update 19 July

问题 How to get at the same time two codes when i have pressed two keys on the keyboard? In it, I only get one keyCode... document.onkeydown = function(e) { var key = e.keyCode ? e.keyCode : e.which; text.innerHTML += key; }; 回答1: look here JavaScript multiple keys pressed at once http://jsfiddle.net/vor0nwe/mkHsU/ zsvar log = $('#log')[0], pressedKeys = []; $(document.body).keydown(function (evt) { var li = pressedKeys[evt.keyCode]; if (!li) { li = log.appendChild(document.createElement('li'));

问题 I have prepared the following React Component (React version 1.5.2): var QuickSearch = React.createClass({ searchHandler: function(){ this.props.parent.props.dataSource.search = this.refs.SearchInput.value; this.props.parent.props.dataSource.setPage(1); this.props.parent.getData(); }, refreshHandler: function(){ this.props.parent.props.dataSource.search = this.refs.SearchInput.value; this.props.parent.getData(); }, myEventHandler: function(evt){ console.log(evt); if(evt.keyCode === 13) { evt

问题 I have the following code to automatically update the content inside a div when the user types it inside a CKEditor textarea: CKEDITOR.instances.editor.on("key", function(e) { var preview = document.getElementById('some-div'); preview.innerHTML = CKEDITOR.instances.editor.getData(); }); The problem is that if I type in "Hello world", in the div it appears "Hello worl" and the "d" doesn't appear until another key is pressed. And I would want the same content in both places. Thanks in advance!