android data storage best practices

As a mature mobile phone system, Android provides multiple storage methods for data storage, such as SQLite, SharedPreferences, File, and ContentProvider.,This article mainly introduces SharedPreferences, which is called SP for short. SP is a more lightweight data

Android supports four data storage methods: Preference, file, database, content provider . A test at work these days Program I want to store an image file. I have a little bit of experience using the file method. First, preference, file, and Database correspond to/data/directories/Package name/Shared_pref,/

Android provides four Data Storage Methods: Shared preferences: used to store data in the "key"-"value" format. It is a lightweight key-value storage mechanism, only basic data types can be stored. Filws: file

I. Data storage File: In android, you can create a file to save data on the storage device of the device or an external storage device. By default, files cannot be shared among different programs. Context in

) {Editor.putlong (key, (Long) value); } editor.commit (); } Public StaticObject Getsharedpreferences (context context, string key, Object defvalue) {String type=Defvalue.getclass (). Getsimplename (); Sharedpreferences sharedpreferences=preferencemanager.getdefaultsharedpreferences (context); //Defvalue is the default value and returns it if the data is not currently available if("Integer". Equals (Type) { returnShared

! You're not mistaken! stored in the file is this, plaintext storage is not a bit of security, even if the set activity.mode_private permissions in front of the root authority is also vulnerable. So when we use sharedpreferences, we try not to store some data about the user information such as the userid,userpwd in this example, if you want to store how to remedy it? We can MD5 key for example MD5UTILS.MD5

SharedPreferences for Android Data StorageSharedPreferences is a lightweight data storage method. It stores key-value pairs based on XML files and is usually used to store some simple configuration information. The SharedPreferences object can only obtain data, but does not

DefaultValue3. Editor Update SP File interface---Editor put (name,value) saves a key-value pair (but does not actually save it to the file)---Editor remove (name)---Editor commit (), the data is actually saved to the file.The above method return value is the same as the editor type, you can make a method chain call.Second, practice1. Save Data steps:1> Get SP Object2> Get Editor Object3> get the

In android, Parcel is used to bind containers that store basic data types and reference data types through IBinder. This method enables data to be transmitted between processes, parcel positioning is a lightweight and efficient object serialization and deserialization mechanism.The Framework has the parcel class. The s

In Android, parcel is used to bind containers that store basic data types and reference data types through ibinder. This method enables data to be transmitted between processes, parcel positioning is a lightweight and efficient object serialization and deserialization mechanism. The Framework has the parcel class. The

Android data storage method-SharedPreferences, sharedpreferences Android data storage methods include SharedPreferences, file storage, SQLite database, Content provider, and network ser

This chapter describes simple data storage in Android development. Involved in knowledge is mainly sharedpreferences, and multi-page switch Viewpager.1. Functional RequirementsTo do a small application, start with the left and right guide diagram, only the first time the display, after reading, the next start will not show again. Do two activity Display

Three of Android's typical local data storage methods Sharedpreferences Save in a file format in local storage SQL database This article explains how to save a file using Sharedpreferences. The main explanation is what is written in the annotation. Ide:android Studio Reference article: http://www.jb51.net/article/74215.htm Ramble about: Originally file ope

This article mainly records how to determine the existence of tables in the database in Android Sqlitedatabase and the basic operation of testing the Sqlitedatabase database. For a detailed description of SQLite, you can view the reproduced Android data storage--sqlite use detailedExample :androidmanifest.xml--did not

Looking at Android data storage today, there are three main ways to store Android data:1, ordinary file storage.With regard to normal file storage, the Android context class has a openf

A variety of storage technologies are provided in the Android system. These storage technologies can be used to store data on various storage media,AndroidThe following methods are provided for data

Data storage and access Many times our software needs to store or revisit the processed data. Android provides a variety of ways for data storage, including the following: File Sharedpreferences SQLite database Contents provider

sharedpreferences of Android data storageOne: Sharedpreferences Sharedpreferences is a lightweight storage class on the Android platform that holds some of the most commonly used configurations of the app, such as activity state, when activity is paused, Saves the state of this activity to sharedpereferences,

1. The file storage data uses Io operations in Java to store and read files, but Android encapsulates the methods for retrieving input and output streams in the context class.The created storage file is saved in the/data/ 2. operation.Save the file content: Get the output

(int offset);//with the current position as a reference, move to the specified line C.movetofirst ();//move to the first line c.movetolast ();//move to the last row c.movetoposition (int position);//move to the specified line c.movetoprevious ();//move to the previous line C.movetonext ();//move to the next line C.isfirst ();//Whether point to the first c.islast ();// Whether to point to the last C.isbeforefirst ();//whether to point to the first bar before C.isafterlast ();//whether to point t