clear

问题 I'm new to android.. I'm facing a problem with radio buttons..Please guide me. I have a radio group. First time it displays its unchecked. when user select the option at first time, i didn't face any problem. In mean time i have a next button. when user click on next button the options are unchecked for second question. Like the way user goes by giving next for next question. It works fine up to 4 or 5 questions after that while going for next question it throws error. please guide me....

问题 I have a ASPxGridLookup like this; <dx:ASPxGridLookup ID="GridLookup" runat="server" Text='<%# Bind("AKTOR") %>' ClientInstanceName="gridLookup" DataSourceID="SqlDataSource3" KeyFieldName="KOD" MultiTextSeparator=";" SelectionMode="Multiple" TextFormatString="{0}"> <GridViewProperties> <SettingsPager PageSize="20" /> </GridViewProperties> <Columns> <dx:GridViewCommandColumn ShowSelectCheckbox="True" /> <dx:GridViewDataColumn FieldName="KOD" /> <dx:GridViewDataColumn CellStyle-Wrap="False"

问题 I just create a app for writing the text on Screen using TouchEvent method. It works fine. See this is code public TouchEventView(Context context, AttributeSet attrs) { super(context, attrs); paint.setAntiAlias(true); paint.setColor(Color.WHITE); paint.setStyle(Paint.Style.STROKE); paint.setStrokeJoin(Paint.Join.ROUND); paint.setStrokeWidth(5f); } @Override protected void onDraw(Canvas canvas) { canvas.drawPath(path, paint); } @Override public boolean onTouchEvent(MotionEvent event) { float x

问题 The value of the TextView is inserted by selecting the Item on List (ArrayList). When I close and open the app again the value in the TextView is still there. There is some way to clear the value of TextView? 回答1: TextView myTextView = (TextView) findViewById(R.id.myTextView); myTextView.setText(""); 回答2: If you would like for your hints to show in the fields, don't set the TextView text to an empty string; instead, set it to null . TextView myTextView = (TextView) findViewById(R.id

问题 I have this jQuery script: $(document).ready(function() { $(':input:enabled:visible:first').focus(); $('.letters').keyup( function() { var $this = $(this); if($this.val().length > 1) $this.val($this.val().substr(0, 1)); $(this).next('input').focus(); }); }); It will set focus on the first input='text' field on page load. When a user enters a character it will move focus to the next following input field. It will also limit the number of characters allowed in each field (currently 1 character)

问题 I have this jQuery script: $(document).ready(function() { $(':input:enabled:visible:first').focus(); $('.letters').keyup( function() { var $this = $(this); if($this.val().length > 1) $this.val($this.val().substr(0, 1)); $(this).next('input').focus(); }); }); It will set focus on the first input='text' field on page load. When a user enters a character it will move focus to the next following input field. It will also limit the number of characters allowed in each field (currently 1 character)

问题 I am trying to clear the contents of a file I made in java. The file is created by a PrintWriter call. I read here that one can use RandomAccessFile to do so, and read somewhere else that this is in fact better to use than calling a new PrintWriter and immediately closing it to overwrite the file with a blank one. However, using the RandomAccessFile is not working, and I don't understand why. Here is the basic outline of my code. PrintWriter writer = new PrintWriter("temp","UTF-8"); while

问题 i'm using setInterval to check if a p(html paragraph) has a certain text value. if it has it i want to clear interval an continue code flow. i'm using this in a jQuery plugin so if the paragraph has tat text value i want to clear interval and then continue with a callback function. so i tried something like this: var checkTextValue = setInterval(function(){ var textVal = $('p').text(); if(textVal == 'expectedValue'){ clearInterval(checkTextValue); callback(); } },10); and the callback

问题 I have created a simple grid of divs by left floating them and an empty div with a clear at the end of each row. This works fine in Firefox, but in IE I get extra vertical space between rows. I tried to apply the "clearfix" method, but I must be doing something wrong. Why does IE insert the extra vertical space and how can I get rid of it? <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title></title> <meta http-equiv="Content-Type" content="text/html; charset

问题 I have encountered a <div class="clear"></div> at many places, but I am not aware why is it done? Can someone brief me on this, why it is used in css? This is the CSS: div.clear { clear:both; } 回答1: The height of an element is determined by its child elements (unless it is explicitly set). E.g.: +------A------+ |+-----------+| || B || |+-----------+| |+-----------+| || C || |+-----------+| +-------------+ The height of A is determined by where the lower border of its child C is. Now, floating