sync notes android

Android learning notes-App Initial Startup interface implementation, android-app When many apps on android phones start, an image is displayed first. as the beginning of the app, the image is transient. This image usually uses the app icon as an advertisement. For example: Its implementation method is very simple.

[Android Notes] widgets and Android WidgetsWhat is a Widget? The App Widget is a desktop tool provided by android. It can be embedded into the desktop and can regularly update its own data.As shown in: How to Create widgets? The following components are required to create a Widget: 1 AppWidgetProviderInfo: This class

() { Android.applicationVariants.all {v- if (V.name.endswith (' Debug ')}) { String name = V.name.capitalize () dependsOn "Install$name"}} }The DependsOn method shows that this is part of the configuration phase, not execution. Each variant of the name, like Friendlydebug, is capitalized (Friendlydebug), and then the corresponding installation task (INSTALLFRIENDLYDEBUG) is added to the installdebugflavors task.This mission is in the configuration phas

Recently made a login dialog box, in the acquisition of data errors, when running the automatic panic.Error statement:EditText Passwordeidttext = (EditText) Findviewbyid (R.id.userpasswordeidttext); Send textString message =passwordeidttext.gettext (). toString ();should be modified to:EditText Passwordeidttext = (EditText) Dialogview. Findviewbyid (R.id.userpasswordeidttext); Send textString message =passwordeidttext.gettext (). toString ();Resources for Online Search:Get a custom dialog boxFin

(i) Global access to the context1. Create Applicationutil class inherits from Application class:1 Public classApplicationutilextendsApplication {2 3 Private Staticcontext context;4 5 @Override6 Public voidonCreate () {7Context =Getapplicationcontext ();8 }9 Ten Public StaticContext GetContext () { One returncontext; A } -}2. In the Androidmanifest.xml file, change the Name property of the application tag (if no attribute is added) to: Package name. applicationutil.

In the Android project, we often need to refer to third-party dependent package library, you may encounter the following reference error questions:Re-open the display management error after setting up the library is reference there is a red fork, Eclipse did not error.Then it is possible because:under the Windows system , your project is not in the same drive or directory as the library project you are referencing. Because if the ANDROID.LIBRARY.REFER

= kilobyte/1024; - if(Megabyte ) { -BigDecimal RESULT1 =NewBigDecimal (double.tostring (kilobyte)); the returnResult1.setscale (2, bigdecimal.round_half_up). Toplainstring () + "KB"; - } - - DoubleGigaByte = megabyte/1024; + if(GigaByte ) { -BigDecimal RESULT2 =NewBigDecimal (double.tostring (megabyte)); + returnResult2.setscale (2, bigdecimal.round_half_up). Toplainstring () + "MB"; A } at -

; Radiogroup> TableRow> TableRow> TextViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Hobby"android:textsize= "16pt" /> define a vertical linear layout - LinearLayoutandroid:layout_gravity= "Center_horizontal"android:orientation= "vertical"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content" > define three check boxes - Che

; TableRow> TableRow> TextViewAndroid:layout_height= "Wrap_content"Android:text= "Password:"/> EditTextAndroid:id= "@+id/passwordinput"Android:layout_height= "Wrap_content"Android:hint= "Input to Password"/> TableRow> TableRow> ButtonAndroid:id= "@+id/loginbutton"Android:layout_height= "Wrap_content"Android:layout_span= "2"Android:text= "Login"/> TableRow>Tablelayout>The results shown are:　　Obviously, it's ugly, we want to have a certain amount of space betwee

[Android Notes] Precautions for deleting an item in ArrayAdapter: Android arrayadapterArrayAdapter provides the remove Method to delete data from the data source and refresh the interface. The source code is as follows: Public void remove (T object) {synchronized (mLock) {if (mOriginalValues! = Null) {mOriginalValues. remove (object) ;}else {mObjects. remove (obj

= "font-size:medium;" >) where xxx activity string getstringextra if boolean getbooleanextra And so on, you can find it yourself. ( 2 some can have default values, such as Getintextra There are two parameters, the first is the key name, and the second is the default value, which means that if the key value does not exist, the default value is used. classAndroidAmong the threads1 , in UI cannot be modified outside the thread UI the. So who creates the view who can go and modify it.

Android source code to download the reference on the Internet, it is not posted up, mainly notes under the download source code in the process need to pay attention to the place.1. Google official download steps address:Http://source.android.com/source/downloading.htmlThe steps inside are more specific.Note: You need to install Git-core and curl first$: sudo apt-get install Git-core curl2. Because of domest

To download the Linux kernel adapted to Android, it should be downloaded via the URL provided by Google, not just downloadable. After strictly performing the steps on the book you can download the source code for Android. By relying on the repository (. git), you can easily download the updated version of the content via Repo sync, and do not delete the. git.We c

For details, refer to the Development notes of an Android tablet project-scheduled task backup Create a class to inherit from asynctask Public class backuptask extends asynctask // Obtain the path of the database in use. My path is/dlion/db_dlion.db under the sdcard directory.// The default path is/data/(package name)/databases /*. DB file dbfile = mcontext. getdatabasepath (environment. getexternalstoraged

work what, can also add points. Sometimes I look at my previous notes and look at those one hundred or two hundred notes, which is a full sense of accomplishment. But at that time to write notes too casual, this review, is in the past notes on the basis of the leak, refine, merger of similar, toPerfection! look at the

AndroidStudy Notes Series Android Application Development Notes (1): Call and send SMS, receive SMS interface, send email (call, dial, smsmanager, broadcast, email) Android Application Development Notes (2): Read the contact information in the mobile phone (

/contacts. The source code is as follows. This provider requires read and write permissions. Android: authorities = "contacts; com. android. contacts"Android: label = "@ string/provider_label"Android: multiprocess = "false"Android: readPermission = "

Android source code to download the reference online more, do not stick up, mainly notes under the download source code in the process need to pay attention to the place.1. Google official download steps address:Http://source.android.com/source/downloading.htmlThe steps inside are more detailed.Note: You need to install Git-core and curl first$: sudo apt-get install Git-core curl2. For domestic reasons (you

..."); Setcontentview (TV ); System. Out. println ("done! "); } Public native string stringfromjni (); Static { System. loadlibrary ("myjni "); } } Notes: Public native string stringfromjni (); this statement contains the native keyword, indicating that the method is a local method. System. loadlibrary ("myjni"); this statement is used to load our c dynamic library. The specific implementation of the method stated above is in the library we load.

Android basic notes (1) 1G-5G introduction to the Android operating system introduction to the Android version Android system architecture introduction to different ART-Mode Simulators of two virtual machines SDK directory Android