multitasking apps for android

There are three ways to get rid of the title bar in Android, and they have their own characteristics.1. Implement in CodeRemember: This code should be written in front of Setcontentview (). 2. Implemented in the manifest file (manifest.xml)This can be used to set the entire application to no title bar, if only one activity is set to a untitled bar form, as long as the above the third line of code written to a certain activity inside it. 3. Defined in

so on. For example, "*" means matching any class name but does not include the package delimiter, while "* *" matches any class name and includes any number of package delimiters. So the code we commented on above means the following: the first line: all methods that keep all classes under Com.ttdevs.proguard and sub-packages are not confused, and the second row keeps all methods and member variables of the class under Com.ttdevs.proguard and all the classes under the sub-package are not confus

Two applications between the value, in fact, the title is too water, the professional argument is "two process how to pass the value", what?! It's not professional enough, okay, you're kinky! "Interprocess communication" is actually more professional, this time you always satisfied! Incidentally, abbreviated to IPC:inter-process communication. Brothers, if you find this article from search engines or other sources, it means that your Android technolog

-------------------four statesCreate---------------onCreate ()------------Start----------------OnStart ()--------------Resume---------------onresume ()-----------Enter the active stateRestart--------------Onrestart ()------------Pause----------------OnPause ()------------into a paused stateStop-----------------onStop ()-------------Enter the stopped stateDestory--------------ondestory ()----------End stateUse the log class to print:LOG.V (String tag,string text);------Verbose levelLOG.D (String

the outline of a view usingView.setClipToOutLine()Method, orandroid:clipToOutlineProperty. There is only a rectangle, rounded rectangle, and the outline of the circle is clipped and can be usedOutline.canClip()The method detects if the crop is supported.Crop the view to a drawable shape. Sets drawable as the background for the view (the view is displayed on it), and the method is called View.setClipToOutline() .Cropping a view is an expensive operation and does not use shape animation when crop

the flag variable is 1, indicating that a connection was generated.When currentstate-historystae =-1, the state is connected to a break, at which time the flag variable is 0, indicating that a fracture has occurred.Create a function to get the Currentstae:public int getcurrentstate () {return this.manager.getWifiState () = = wifimanager.wifi_state_enabled? 1:0;}Next we modify Mythread's Run method as follows:@Overridepublic void Run () {if (historystate = =-1) {currentstate = Getcurrentstate ()

Android web apps development, the official documentation is as follows: http://developer.android.com/intl/zh-CN/guide/webapps/overview.html. First, I felt that the official Android documentation is getting better and better. To put it bluntly, the web app uses webview for development. If you have time, you must take a good look at this document. The more you lea

Why do Android apps use MulticastSocket to listen for multicast? Why do they connect to different routes and run on different mobile phones? Some of them cannot receive multicast messages. ---------------------------!! Reprinted please indicate the source !! ----------------------- A project that uses Wi-Fi multicast to discover devices in the LAN. However, it is found that some routers can work normally, a

In Android app development, there are occasional exceptions that cause the app being used to be abnormal and forced to shut down, which leads to an unfriendly user experience. To solve this problem, we need to catch the exception and do the processing. There are two kinds of exceptions in Java, namely error and RuntimeException, the former do not need us to deal with, we often deal with the latter. So how do you catch the exception of threads at run t

1, about IconfontIconfont is both icon and font, in particular, it should be displayed in the form of a font icon. Unlike icons in traditional picture formats, this kind of icon is easy to change in size, color, and background color because it is displayed in font form.2. How to use 2.1 Download resourcesResource Source: http://www.androidicons.com/ Follow the guide to find the download link. Download the decompression to find Iconfont/font, the inside of the four files copied to the

1. Get all installed applicationsListPackageInfo>Packages=Getpackagemanager (). Getinstalledpackages (0); for(intI=0; Ipackages.size (); I++) {PackageInfo PackageInfo=Packages.get (i);AppInfo Tmpinfo=NewAppInfo ();Tmpinfo.appname=PackageInfo.applicationInfo.loadLabel (Getpackagemanager ()). ToString ();Tmpinfo.packagename=Packageinfo.packagename;Tmpinfo.versionname=Packageinfo.versionname;Tmpinfo.versioncode=Packageinfo.versioncode;Tmpinfo.appicon=PackageInfo.applicationInfo.loadIcon (Getpackage

The recent test reported such a problem, in the version of the installation will be reported as follows crash, test it sure enough, specific follow-up, found that the problem is required to be conditional:1,4.0 or 4.1 system2, over three activity in front activitystack stackAfter many of my colleagues have encountered the same problem, the collection memo. There is no good solution at the moment. There is no such problem on a higher version of the system or on a lower version. There is no time f

shortcuts Sendbroadcast (_returnintent);Launcheractivity. This. Finish ();}of course, the above to join the call permission :If we want to uninstall the shortcut, we need to add the permission in the layout fileThen the Com.android.launcher.permission.UNINSTALL_SHORTCUT is passed into the intent( two ): use an Activity, and then click on the Home screen menu-> add Select Shortcut - Select the shortcut for the created application , see the following effect : Create the steps below :①: regist

| Findstr "5037" tcp 127.0.0.1:5037 0.0.0.0:0 LISTENING 4236 tcp 127.0.0.1:5037 127.0.0.1:49422 established 4236 TCP 127.0.0.1:49422 127.0.0.1:5037 established 3840 Open Task Manager to kill this process with PID 4236. OK, so this problem is solved4. Start debugging on the real machine select Run--run configurations in Eclipse, select the project you want to debug on the left, then switch right to th

dynamic shading in Android5.0 (API 21) and later versions, while older versions use traditional shading. Use these properties to customize the appearance of the CardView: Use the Card_view:cardcornerradius property to set the radius of the fillet in the layout file.Use the Cardview.setradius method to set the radius of the fillet in Java code.Sets the background color of the card, using the card_view:cardbackgroundcolor property. The following is an example that contains a cardv

Reprint Please specify source: http://blog.csdn.net/jason_src/article/details/37757661There are many ways to get the package name and version number for other apps on your Android phone, which can be obtained directly from the APK package via AAPT or via code on your phone. Obviously, for the product or user to obtain this information, on the phone to obtain more convenient.Let's look at how to get the pack

In the development process encountered by the return key exception exit problem, log display as a null pointer exception, further production is because the Onactivityresult intent is empty.Press the back key to duplicate the code as follows: @Overridepublic void onbackpressed () {super.onbackpressed () Intent Intent = new Intent (); Intent.putextra ("id", id); Intent.putextra ("path", path); Setresult (result_canceled, intent); Finish ();}View activity source Discovery onbackpressed The d

PreferencescreenAndroid:key= "Button_hmt_setting"Android:title= "@string/hmt_setting_title"android:persistent= "false"> Intentandroid:action= "Android.intent.action.MAIN"Android:targetpackage= "Com.sougou.numberlite"Android:targetclass= "Com.sougou.numberlite.Setting" />Preferencescreen>Android:persistent= "true" property value true to set will not be killed by the systemAndroid:targetpackage the target package name to jump toAndroid:targetclass the target class name to jump toAdd preferen

Original: http://blog.csdn.net/gaojinshan/article/details/14230673The following configuration is used in Androidmanifest.xml:You will get an error: Permission is just granted to system appsThe reasons are as follows:Such permissions are granted only to system-level applications and can modify the security level of the next link Error checking entry;In Eclipse:window, Preferences, Android, Lint Error CheckingIn the ID list, find id = protectedpermissio

BlueStacks comes from the following requirements: N multi-network disks use the task mode. After each task is completed, the corresponding space is provided to stick to the user. However, Android mobile phone resources are limited. Too many apps are cumbersome, and there are also users who do not need smart phones. So BlueStacks adapted to this trend ~ I have to say that this is an artifact, just wait f