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FIS = openfileinput ("Test.txt"); the //1. Definition byte[] - byte[] B =New byte[1024]; - inti = 0;//length of data read theString str1 = ""; the //2. Cyclic reading the while((i = Fis.read (b)) >0) the { -String str =NewString (b,0, i); theSTR1 + =str; the } the fis.close ();94 Tv_1.settext (str1); the } the Catch(Exception e) the {98 About } - }101}
Android stores and loads local files (internal storage devices) and android storage devices
All applications on Android devices have a directory of files placed in the sandbox. Saving the files in the sandbox can prevent other app
abstract In fact, the operation of the Android file and Java in the PC environment is not two, the reason why need to be explained separately is because the Android system provides different from the PC to access the file system root path of the API, while the application of a private file to do a unified management. In my experience, beginners in this section feel it is easy to confuse both
Original link: http://m.blog.csdn.net/article/details?id=17725989abstract In fact, the operation of the Android file and Java in the PC environment is not two, the reason why need to be explained separately is because the Android system provides different from the PC to access the file system root path of the API, while the application of a private file to do a unified management. In my experience, beginner
Android learning notes: internal storage of data; practice Data Reading and writing; storage to Cache for reading and writing; android learning notes
(1) directory structure
(2) Layout file:
(3) tool class for saving and reading data: FileService. java
Package com. exa
ObjectiveI've been talking about Androidui, but it's not over yet, and I'll add it later. Today, I'll talk about other things about data persistence. For an application, it is unavoidable to be able to store the data, and the Android program is no exception. In Android, there are several ways to implement data persistence. The following will be described separately.In A
troublesome.But Google has provided us with a dedicated access to internal storage api:getfilesdir () Create a file where the user saves the user name and password //file file = new file ("Data/data/com.demo.storage/info.txt"); Getfilesdir returns a file object whose path is: data/data/com.demo.storage/files File File = new file (Getfilesdir (), "Info.txt") ;The path to the Getfiledir is un
File storage (internal storage)once the program is installed in the device, the data/data/package name/That is the internal storage space, external confidentiality.The context provides 2 ways to open an input, output stream
FileInputStream openfileinput (String name)
Learn android from scratch (Data Storage (2) Internal Storage. 36 .)
CallopenFileOutput()With the name of the file and the operating mode. This returnsFileOutputStream. PassOpenFileOutput () creates a FileoutputStream object
Write to the filewrite(). Create a Write object and perform data read/Write operations.
Clo
Download source code (download-free credits): Download
You can directly store data in internal storage. By default, files are private to internal storage and cannot beWhen you uninstall an application, the files are removed.You can create and write data in two ways:
Using related methods in java,
Use the related met
Some of the application's configuration files need to be stored on the phone. Generally divided into internal storage and SD card storage.One. Internal storage, to FileOutputStreamNew File (Getfilesdir (), "User.txt"); // Open local File preparation record Try { new fi
Android newest mobile phone internal storage size, SD card storage size Method
We used to obtain this information in the past.
// Before Android API18: fs. getAvailableBlocks () * fs. getBlockSize ()
Currently:
/** Obtain available system memory **/@ SuppressLi
I don't know if you have any discovery, from cainiao's growth history: http://blog.csdn.net/zjbpku/article/details/25161131,
Later versions of KitKat do not support write operations on external SDcard (Secondary Storage. If you want to copy files to your mobile phone
It is stored in internal storage, but cannot be stored in external sdcard, and cannot create new
We usually develop when the file cache, commonly used in the mobile phone internal storage and external storage of mobile phones, mobile phone internal storage mainly includes the app after the installation of some files, external storag
Android briefly introduces SharedPreference, internal files, and sdcard data storage,
SharedPreference
Store simple data in xml structure and store it in the data/package name/shared_prefs folder
Usage
There are three ways to create an object
GetSharedPreferences () of Context ()
GetPreferences () of the Activity ()
Getdefasharsharedpreferences () of PreferenceMa
{// Files directory updatedir = getfilesdir ();} updatefile = new file (updatedir. getpath (), getresources (). getstring (titleid) + ". APK ");
2. Internal Storage PermissionsAll of them run normally, but when we execute the running operation for the APK file, the prompt is as follows,"Parsing package error "?? In fact, the file you downloaded may not necessarily be bad or wrong, or the
files within the internal storage space even if they follow the step-by-step root.So how does it come true? A simple to ridiculous approach (get this is the security of the Android System vulnerability), in the code, we can access, read things inside the storage space, can also read and write the SD card and other ext
When downloading the apk in the automatic app update module, you may encounter two problems: internal storage and SD card storage. The apk stored in the sk card can be installed normally, however, parse error occurs when apk is installed in the internal storage.
You can sear
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