gui based android app development

Full record of mobile phone billing application development based on Android platform (data transfer between activity, Sqlitedatabase, Asynctask)Course Category: AndroidSuitable for people: intermediateNumber of lessons: 26 hoursTechnology used: Asynctask, drawable, SQLite, selector, layoutRelated projects: Mobile phone billing applications

through later optimizations, but structural flaws that are pervasive and limit performance are almost impossible to correct unless the program is rewritten. Changing a basic aspect of your design after the system is complete can cause your system to be structurally ill-conditioned and difficult to maintain and improve. So you should consider performance issues during the design process.Try to avoid the design that limits performance. Consider the performance consequences of your code design. It

Android native fonts may not let the UI sister paper favor, it is too ugly, so the UI sister paper used third-party fonts as the font style of the app, this blog is to summarize in the development of Android app how to use third-party fonts.first, there must be a third-party

Blog Melon Maidong = original recordOften many friends in the Android app development process, encountered the creation of a good Android project, the appcompat-v7 error occurred, because Android starting from 5.0, the introduction of this project library, the solution has t

system font size. If the font is in DP, the system font size is changed, and the font size of the interface's view does not change.For example: for the following code, two TextView in a vertically distributed linearlayout, the first TextView uses the SP as the unit of the font, and the second TextView uses the unit of the DP as the font:[HTML]View PlainCopy print? span style="Font-family:microsoft yahei;font-size:18px;" >TextView android:text="@string/hello_world" android:layout_

After you create an Android app project, start debugging directly and discover that visual Studio Emulator for Android has run successfully, but the app is always in build (wait longer than 1 hours) and is not deployed to the emulator as expected via ADB. Export the app dire

See here: Android App development using PhoneGap for location escalation The previous article, using IntelliJ idea to build phonegap Android development environment, simply introduced the PhoneGap Android

Android Studio Android studio is a brand new Android development environment. Based on intellij idea, similar to eclipse ADT, Android Studio provides integrated Android

= localprocess.getoutputstream ();D ataoutputstreamlocaldataoutputstream=new DataOutputStream ((OutputStream) localobject); Stringstr=string.valueof (paramstring);localobject=str+ "\ n"; Localdataoutputstream.writebytes (String) localobject); Localdataoutputstream.flush (); Localdataoutputstream.writebytes ("exit\n"); Localdataoutputstream.flush (); Localprocess.waitfor ();int Result=localprocess.exitvalue ();return (Integer) result;} catch (exceptionlocalexception) {localexception.printstacktra

If you want to make the most failed case on Google Play, the best secret is that the interface is extremely slow, consumes power, and consumes memory. Next, you will get negative comments from users, and your reputation will become bad. It is useless even if your applications are well designed and creative. Every problem that affects product efficiency, such as power consumption or memory usage, affects App success. This is why it is crucial to ensure

android:name="Android.intent.category.DEFAULT"/> data android:scheme="sms" /> data android:scheme="Smsto" /> intent-filter> -- intent-filter> action android:name="Android.intent.action.SEND"/> category android:name="Android.intent.category.DEFAULT"/> data android:mimetype="image/*"/> data android:mimetype="Text/plain"/> intent-filter>activity>Note : In order to receive intent, we need to include the category of Category_default in the inten

Original address: http://www.javacodegeeks.com/2014/05/simple-tips-to-secure-android-app.htmlHttp://developer.android.com/training/articles/security-tips.html Android already has security features built into the operating system that significantly reduce Application security issues frequency and impact , but as an application developer , we also need to be aware of security issues when developing applicat

Cattle registration), seven cow space How to say, I have always wanted to use, but has been useless, OK, we create a new public bucket, name casually, in the content of the management of a random upload something,This is the test address http://tie163.qiniudn.com/record.txtOpen this test address and we see that we've uploaded something inside. Yes, this is all our own stuff, so we can use Android to read the contents of our address, right? (In fact,

Android App Development Video tutorialCourse Overview: 0 basic 3G Android mobile development Employment class, a total of more than 10 high-quality Android real-time projects, courses include andriod so technical point, is current

, so just create one directly and then enter "0x2a45" to save. Re-testing will be no problem, such as:　　And that's the Adb_usb.ini of the file. Blue Note2 when connected to a computer, there is an option such as "built-in discs" such as:　　After selecting him, "My Computer" is like this, more than a "CD drive":　　After opening, there is an introduction to "Adb_usb.ini" in the "I:\USB Reference manual\ simplified \adb_ reference manual. txt":Second, the Windows XP Chinese environment1. Create or mo

Android Tutorial is about to startSay this opened the blog, has been trying their own app, found that the TM is really uncomfortable, not easy to use, well, it was intended to give up, but see the phone there is another pit, simply re-do a bar.The original God Reply app address http://app.sohu.com/app/info?app_id=24203

Environment: already has the root permission of Android system, our apk is boot startTest: Copy the 2 identical versions below the system System/app directoryThe ADB root #获取root权限, provided that the root permission has been opened, namely: Debug compiled Android system adb remount # will write the system directory to ADB push c:/test_1_v1.apk/system/ The

activity, The name we pass in here is used to set the MainPage in the springboard activity.Intent page1 = new Intent();page1.SetClass(this, typeof(ShortcutContainerActivity));page1.SetAction(Intent.ActionMain);page1.PutExtra("PageName", "Page1"); Shortcutinfo is instantiated below. Setrank to set the ordered ordinal, up to 5 Shortcut, which is 0-4; SetIcon is the set icon; Setshortlabel and Setlonglabel are set long name and segment name; Setintent instantiate the previous step Inte NT incomi

. OnCreate (savedinstancestate); TextView TextView=NewTextView ( This); Textview.settext ("Helloworld!"); Setcontentview (TextView); }}Open Androidmanifest.xml, modify its contents to the following codeManifestxmlns:android= "Http://schemas.android.com/apk/res/android" Package= "Com.example.lushengduan.helloworld"> ApplicationAndroid:allowbackup= "true"Android:icon= "@mipmap/ic_launcher"Android:label= "@string/app_name"Android:supportsrtl= "true

IntroductionNetwork has been my personal blind spot, a while ago to take time to learn a bit volley network tools to use, but also through the source of further learning, have some experience to share. In Android development, a lot of mature network tools, Android comes with HttpClient, as well as okhttp, as well as the Koush great God created ion open source pro