How to create a third-party database for Android software development and how to read a database from a file
Original by Yu Song MomoArticleIf you reprint it, please note: Reprinted to my independent domain name blogYusong Momo program Research Institute, Original address: http://www.xuanyusong.com/archives/199
I haven't updated my blog on the android
Android implements SD card and memory file storage in the same way. The method for obtaining the file path is basically the same as that of java. The following is the code of the program. The configuration location and implementation are different. Others are the same. The following code is used:
Main. xml:
[Html]Android
Attribute
Description
Description
Android: id
Specify the corresponding ID for the control
Android: text
Specify the text displayed in the control. Note that strings in the strings. xml file should be used as much as possible here.
Android: gravity
Specifies the alignme
Attribute
Description
Description
Android: ID
Specify the corresponding ID for the control
Android: Text
Specify the text displayed in the control. Note that strings in the strings. xml file should be used as much as possible here.
Android: gravity
Specifies the alignme
--------------------------------------------------------------------------------------
Android: Theme
If no theme is set, the theme style of the activity belongs to the application. For more information, see the theme attribute of the Bytes --------------------------------------------------------------------------------------
Android: windowsoftinputmode
The interaction mode between the main activity windo
How to slim down your Android Installation File (APK) and androidapk
Source Address: How to slim down your Android Installation File (APK)
It is an indisputable fact that the apk file of Android is getting bigger and bigger. In
Qt on Android: resource file system qrc and assets, androidqrc
When using Qt for Android development, sometimes our application carries some resource files, such as png and jpg, or some configuration files, such as xml, where are these files stored?
There are two methods:
Let's take a look.The Qt Resource System
Qrc and Qt resource
BackgroundLike applications on other platforms, apps in Android also use various resources, slice, and strings and place them in the corresponding folders of the source code, such as/res/drawable, /res/xml,/res/values/,/res/raw,/res/layout and/assets. Android also supports and encourages developers to use XML resources to implement UI-related layout and elements. To sum up,
Android development, the ADB tool is indispensable and sometimes unavailable. After you enter Android tools in Windows, you only need to enter ADB and then there will be a large ticket.
Command Prompt, then you can look at it, read it, and then you will understand it. Then you can refer to the android documentation, which is the best. The common estimation is as
Android Chinese source file Shape usage Summary
In Android development, we often use Shape to define various shapes. First, let's take a look at what labels under Shape mean:
Solid: FillAndroid: color specifies the fill color
Gradient: gradientAndroid: startColor and android: endColor are the start and end colors respe
/tt5267621/article/details/7173972After associating the program, you also need to handle the parameter passing problem! You need to add the following sample code (not tested) in oncreate ):
Intent intent = getintent (); string action = intent. getaction (); If (intent. action_view.equals (Action) {textview TV = (textview) findviewbyid (R. id. tvtext); TV. settext (intent. getdatastring ());}
"Intent. getdatastring ()" returns the path of the clicked file
Application scenarios
During Android Application Development, sometimes we manually create some XML files, which may be used in the project development process, that is to say, the original XML resource file is used. The original XML resource file can be obtained through the following two methods of the Resouce class:
GetResouce. getXml (int id );
GetRawResouce (
What structure does the android file system have? How can we separate this file system? How can I mount a file system? All these questions will be answered in the article.
Friends who have used Linux may have a very good impression on open-source systems. In the increasingly mature mobile operating system, is there
For Android Developers, ANR (Application Not Responding) is a common problem. Generally, if an ANR occurs, the system generates a trace file in the/data/anr/directory. By analyzing the trace file, you can locate the cause of the ANR. There are many reasons for the generation of ANR, such as CPU usage is too high, events are not responded to in a timely manner, de
Summary
In fact, the operation of the Android file and the operation of Java in the PC environment is not the second, the reason why need to be explained separately because the Android system provides a different from the PC access to the file system root path of the API, while the application of a private
This article illustrates the intent and usage of the open file of Android programming development. Share to everyone for your reference, specific as follows:
In writing file management system will be used to open a variety of different formats of the file requirements, because the
Currently, all devices that can be searched by chance involve file operations, such as computers and mobile phones. Android file operations are similar to those on computers. They can be stored in the built-in storage of mobile phones or SD cards. This blog mainly introduces file operations in the built-in storage of m
following armeabi-v8a related to the third party so file, then you need to have other so files to armeabi-v8a version, otherwise it will be an error.4. Suggestions
From the blog: "A long pit with. So" gives advice on:
To reduce the APK volume, keep only the Armeabi and armeabi-v7a two folders, and ensure that the number of. So in both folders is consistent
For third parties that only provide Armeabi versions. So, copy it as-is
debugging is placed. Proc: The system information provided by various files under the/proc file system is not specific to a particular process, but can be used throughout the system-wide context. Data: Store user-installed software and a variety of information. Root: Nothing at all. Dev: Needless to say, the place where the device node files are stored. The following documents are not directories: runme.sh script for automatic mount action of EXT2
Getting Started with Android file system operations (ii) file operations related directives (RPM) (i) Get the total root
File[] Filelist=file.listroots ();
Returns filelist.length to 1
Filelist.getabsolutepath () is "/"
This is the total root of the system.
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