screen

How to prevent Screen lock ios with Qt

白昼怎懂夜的黑 提交于 2019-12-06 09:06:35
问题 I want to develop an app in Qt for iOS that contains a map. During the use, the screen lock of the phone should be disabled. But I can't find any solution how to prevent the screen lock in iOS using Qt. How can be done that? 回答1: You must use the native iOS api. You can compile ObjC++ code directly with the clang compiler in your Qt application. So you can mix .cpp and .mm (ObjC++) files. QtCreator and qmake support this via the OBJECTIVE_SOURCES keyword. In a yourclass.mm implementation:

setting div width according to the screen size of user

允我心安 提交于 2019-12-06 08:13:03
I am trying to set the width and height of a div exactly equal to the size of my users screen. How can it be done. Should I use jquery ? If so, how ? What about some CSS? http://jsfiddle.net/TJGZU/ body, html { /* set size of body to full page and remove margins */ width: 100%; height: 100%; padding: 0; margin: 0; } div { /* set div to full width and height */ width: 100%; height: 100%; } by css seems ideal as pimvdb has suggested...doing it in jquery would be inline styling which would be a bad practice which can be avoided unless necessary. by means of jquery: var windowWidth = $(window)

Which layout is suitable for all Android mobile?

左心房为你撑大大i 提交于 2019-12-06 08:10:14
I am developing one application, right now i am on designing phase. i design one screen on the 3.7WVGA(Nexus One) screen in eclipse using Linear Layout. but when i test it on 2.7 my some icon are go outside of the screen. my question is that which layout is suitable for all screen whether i design it in 3.7 inch or run it on 2.7. Please give me a suggestion. Thanks in Advance. 1st i design it in 3.7 and second in 2.7. Don't ever, ever , ever design a screen for Android based on an actual screen size. You will always screw yourself up because there are a hundred different screens out there.

Why cannot I read data from /dev/graphics/fb0?

筅森魡賤 提交于 2019-12-06 07:35:53
I am using the emulator. So definitely I have the root permission. I use command: adb pull /dev/graphics/fb0 d:/a and then use my program to read this file and generate a bmp. It is successful. But when I use pure java code to do this: Process process = Runtime.getRuntime().exec("su -c cat /dev/graphics/fb0"); process.waitFor(); InputStream is = process.getInputStream(); is.read(buffer, 0, width*height*2); The buffer can not get the correct data. All the data is 0, while the correct is 0xFF at the first several line. Then I tried: adb shell cat /dev/graphics/fb0 > /sdcard/tmp The tmp file also

Android Screen support for Samsung S4 & HTC ONE

笑着哭i 提交于 2019-12-06 06:01:55
I've been browing the site for an answer, I followed this: Android manifest config for smartphone only, Sony Xperia Z, HTC One and Samsung Galaxy S4 missing on google play And yet, google Play does not show Samsung S4 & HTC One as supported by my app in my manifest: <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16"/> <compatible-screens> <screen android:screenDensity="mdpi" android:screenSize="normal"/> <screen android:screenDensity="hdpi" android:screenSize="normal"/> <screen android:screenDensity="xhdpi" android:screenSize="normal"/> <screen android:screenDensity="mdpi"

Adjust the screen in pdfViewer

假装没事ソ 提交于 2019-12-06 05:51:27
I have an application that views pdfs, the problem is that the pdf out of the screen, and if I zoom out the pdf is not focused. I am Using code from this SO answer. Read PDF Using PDFViewer Any ideas? Thank you To increase the view size of PDFVIEWER.jar Create an ABSTRACT CLASS or just copy the code HERE For me I name the class "PdfViewerActivities" To get the desired amount of zoom please refer to the logcat which is trigger when you click the button of zoom icon in the pdf page "PDFVIEWER ST='reading page 1, zoom:0.435'" In private static final float STARTZOOM = 0.435f; change the value

How to differentiate layout for 480 * 800 and 480 * 854 screen resolutions in android?

蹲街弑〆低调 提交于 2019-12-06 05:15:15
问题 In one of the application I need to make sure that UI components will be placed at proper position in all the screen resolution devices. I have gone through the support multiple screen resolutions tutorial on android developer site. Based on that it seems I may have to create separate layout files for small, normal and large screen devices. Now, the issue in this is that even in large screens there are different resolutions such as 480 * 800 and 480 * 854. In the screen the components gets

Handleling image size on multiple device display on cordova-ionic-angular app

末鹿安然 提交于 2019-12-06 04:59:00
I'm building a new app with this great tool and i have a question to solve. What is the best way to handle imnage size for multiple scren and multiple devices. Apple = retina and non-retina Android = ldpi, mdpi, hdpi, xhdpi, xxhdpi and tablets (all this with multiple screen resolution) BlackBerry10 = one resolution (but not equal to the others) WindowsPhone8 = one resolution (but not equal to the others) For this case, what is the best way ? Use SVG images (Optimizacion, perfomance, size of app) ?? Dedicate CSS tags for device pixel ratio (CSS Image Replacement) (the designer can kill me

Android, IOS force pressing on the screen

蹲街弑〆低调 提交于 2019-12-06 04:14:52
问题 Is there any way to measure the force (weight) clicking on the screen in Android or IOS ? 回答1: For Android there is MotionEvent.getPressure(). As far as I know iOS does not have a way to get pressure information. 回答2: Speaking for iOS: there is no possibility to obtain the force employed when touching the screen. 来源: https://stackoverflow.com/questions/8000217/android-ios-force-pressing-on-the-screen

How do you know what you've displayed is completely drawn on screen?

不问归期 提交于 2019-12-06 03:31:29
Displaying images on a computer monitor involves the usage of a graphic API, which dispatches a series of asynchronous calls... and at some given time, put the wanted stuff on the computer screen. But, what if you are interested in knowing the exact CPU time at the point where the required image is fully drawn (and visible to the user)? I really need to grab a CPU timestamp when everything is displayed to relate this point in time to other measurements I take. Without taking account of the asynchronous behavior of the graphic stack, many things can get the length of the graphic calls to jitter