head first android development brain friendly guide

calls from any number of threads at the same time, they must also be implemented as thread-safe.Inter-process communication Android uses remote procedure calls (Remotes procedure Call,rpc) to provide an interprocess communication (IPC) mechanism through which methods that are invoked by Activity or other application components are executed remotely (in other processes). All results are returned to the caller. This requires splitting the method

into the apk when we build the APK, so we can exclude the required files from the APK file using the following configuration:packagingoptions{Exclude ' meta-inf/lgpl2.1 'Exclude ' meta-inf/license 'Exclude ' meta-inf/notice '}1.2.3 Permissions and features configuration for the vast majority of ArcGIS Androidapps applications almost all require network support, and some applications may require access to the device's sdcard, need to have read and write permissions to the card, in addition to th

Android studio Development Guide Author: chszs, reprinted with note. Blog homepage: http://blog.csdn.net/chszs I. Introduction Android studio is a brand new Android development environment. It is based on intellij idea and is si

Android UI development 43rd-use Property Animation to implement moji weather 3.0 guide interface and Animation, androidproperty Previously I wrote moji weather 3.0 guide interface and Animation implementation, which perfectly achieves the Animation effect. That article uses View Animation, and this article uses the Pro

following values. value Description "none" There are no additional UI options. This is the default value. "splitActionBarWhenNarrow" When the horizontal space is limited (such as when the device is in portrait mode), a horizontal bar is added at the bottom of the screen to display ActionBar the Action item in. There is no longer a limited number of Action items displaye

() method, you can perform SQLite queries. The method can pass in various query parameters, such as table name, projection, Select statement, field name, grouping, and so on. If you want to make complex queries, such as using field aliases, use theSQLiteQueryBuilder/code> ，它提供了很多便于构建查询的方法。 Each SQLite query returns one Cursor that points to all records that meet the query criteria. Cursoris the only way to traverse database query results and read row and column data.For an example of an app that

The moji weather was upgraded over the weekend. It looks like the guiding interface is doing well. imitating it may be different from the original author's code implementation, but the implementation effect is similar. First, I would like to share my previous article, the basic knowledge of android Animation, Android UI development Article 12th-Animation effect A

-dimensional graphic transformation Vector fonts From left to right, from right to left, to display style from top to bottom Anti-aliasing Transparency support icons, and image rendering For more information, see examples of two-dimensional graphics library of Silverlight Guide Bees We are in the Android Concise development Tutorial IX: Creating an applica

used on the same device. The application can be moved to internal storage when the user needs it. Users can also request the transfer of applications from internal storage to external storage. However, the default setting for this property is internalOnly that the system does not allow the user to transfer the application to external storage. For more information about using this property, see Application installation location (including how to maintain backward

Discovery". BLE-related classes and BLE-related classes have the following seven: Bluetoothgatt Bluetoothgattcallback Bluetoothgattservice Bluetoothgattcharacteristics Bluetoothgattdescriptor Bluetoothgattserver Bluetoothgattservercallback Among them, the first two implementations of the GATT client support, the latter two implementation of the GATT server support. In most cases, mobile phones play the role of the GATT client. These classes are included in

. Auto: Listens to the parent container. Flex-start: The start alignment of the intersection axis. Flex-end: The end alignment of the intersection axis. Center: The center alignment of the intersection axis. Baseline: The base alignment of the first line of text. Stretch: By default, the height is not set to the full height of the case. In the example here, B item uses align-self to modify the alignment for center , rendering the effect, is a parent container, o

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to simplify subscriber, in the example above, we don't really care about oncomplete and onerror, we just need to do some processing when onnext, and then we can use the Action1 class. action1 The Subscribe method has an overloaded version that accepts three Action1 types of arguments, corresponding to the Onnext,oncomplete, onerror functions. Myobservable.subscribe (Onnextaction, onerroraction, oncompleteaction); We don't care about onerror and oncomplete here, so we

and gives the appropriate access. This allows multiple components of different applications to share the same process, reducing the use of resources. android:readPermission The permissions required to query the Content Provider client. See also permission and writePermission properties. android:syncable whether the data that the Content Provider controls need

the underlying metadata associated with the program. APK and version.When a user searches for or browses an application on Google Play, the background service compares the texture compression format supported by the application to the format supported by the user's device. Comparisons are based on format descriptors and exact matching of strings.Google Play allows users to see the app and provide downloads as long as one of the application's supported texture compression formats is device-suppo

document security and permissions. android:process the name of the process running the service. Typically, all components of an application run in the default process at the time of creation. The name of the process is the same as the package name. the attributes of an element process can set a different default process for each component. But each component can also override the default settings with its own proce

security and permissions. android:process the name of the process running the broadcast sink. Typically, all components of an application run in the default process at the time of creation. The name of the process is the same as the package name. the attributes of an element process can set a different default process for each component. But each component can also process override the default value with its own pr

A book I've been reading recently is the authoritative guide to Android Application Development (fourth edition), which is highly recommended. The book describes some of the user interface design specifications, for beginners I think it is very necessary, here the code to everyone, hope for us all useful. When we design our user interface, we always support speci

this property is not set, it means that the target Activity can be started by an alias without authorization. For more information about permissions, see the section on permissions in the introduction article. android:targetActivity Activity that can be started with an alias. The name must match the attributes of the element that is already defined in the manifest file name . Introduced from:

Intent. When a Intent can be responded to by several different priority activity, Android will only consider the higher priority activity as the Intent potential delivery target. It controls the order in which each broadcast receiver receives broadcast messages. A higher priority Receiver will be called with a priority lower than the priority level. (This applies only to synchronous messages, which are ignored by asynchronous messages).