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Problems encountered:1.java.io.ioexception:open failed:einval (Invalid argument) exception, the SD card in the emulator creates folder and file times wrongThe cause of the error could be: (1) The file name contains non-conforming characters, such as ":", "? "or spaces, and so on. (2) You need to create a folder directory before creating the
Directory (?) [-]
Defining the service interface in Aidl
Automatically generate interface code based on the Aidl file
The articles reproduced can only be used for non-commercial nature, and can not be accompanied by virtual currency, points, registration and other additional conditions. Reprint must indicate the source: http://blog.csdn.net/flowingflying/Remote service in previous learning notes
. Register all componentsAv_register_all ();Initial network FlowAvformat_network_init ();Encapsulates the format context, dominates the global structure, and holds information about the format of the video file encapsulationPformatctx = Avformat_alloc_context ();2. Open the input video fileif (Avformat_open_input (pformatctx,input_str,null,null)!=0) {LOGE ("couldn ' t open input stream.\n");return-1;}
Android security-code security 3-dex file checksumTo recompile the APK is actually to recompile the Classes.dex file, after recompiling, the generated Classes.dex file hash value changed, so we can detect the installation after the Classes.dex
In this example, you can use the sharedpreferences storage and custom file storage methods provided by the Android platform.
1. Follow the following configuration and the method described in step-by-step instance 1 to create the base of the entire project:Project name: examplethreePlatform: android2.0;Application name: examplethreePackage name: COM. ExampleActivity: mainactivityResource
Four storage methods for Android data: SharedPreferences, SQLite, Content Provider, and File (2) -- SQLite and androidsqlite
SQLite is a lightweight database designed for embedded devices. It has only five data types:
NULL: NULL
INTEGER: INTEGER
REAL: Floating Point Number
TEXT: String
BLOB: Big Data
In SQLite, the BOOLEAN and DATE types are not specifically desi
This article is on the basis of the previous blog post on the Android XMPP-based Instant Messaging 1-basic conversation, adding new features to File transfer1. Initialization of file Transfer management class Public StaticFiletransfermanager Getfiletransfermanager () {if(FileManager = =NULL) {Servicediscoverymanager Sdmanager=Servicediscoverymanager. Getinstancef
In the previous article (Android custom View and Its Use examples in layout files), we introduced that when the control provided by the system does not meet the needs of developers, demonstrate how to customize the View. This article will be a continuation of the previous article. First, we will introduce how Android draws the interface, which is a prerequisite theoretical basis, the next article will focus
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This rough introduction-the basic functions of the source file/module under the Netd folder, and the organizational relationship between the main classes.
I. File Composition
Source file module under the Netd file ~ Organization and basic implementation functions:
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