android data storage best practices

The example in this article describes how Android uses files for data storage. Share to everyone for your reference. Specifically as follows: Many times we develop software that needs to store the processed data for a second visit . Android provides the following ways for

As a complete application, data storage operations are essential. Therefore, the android system provides four data storage methods. They are sharepreference, SQLite, content provider, and file. In Android,

Directory structure for Android projects Activity: The interface that is displayed when the app is opened SRC: Project Code R.java: Resource ID for all resource files in the project Android.jar:Android jar Package, import this package to use the Android API Libs: Importing third-party jar packages Assets: Storing resource files, for example MP3, video files Bin: Store compil

First, the File preservation data IntroductionActivity provides the Openfileoutput () method that can be used to output data to a file, and the implementation process is the same as saving data to a file in a J2SE environment. Files can be used to store large amounts of data, such as text, books, audio, and so on.The f

Data persistence means storing instantaneous data in memory on a storage device, ensuring that the data is not lost even when the phone or computer is turned off, that the data stored in memory is persistent, and that persistence provides a mechanism for transforming the

Disclaimer: The book "Secrets of Android Application Development", which records the logs of the book, references the relevant code and summary, and has no commercial use, it is completely a record of self-learning, and many problems will inevitably occur in learning just now. If there are any mistakes, please criticize them a lot. I. Data Storage-SQLite database

The data storage methods used in the development of Android project are: Networked storage, SQLite storage, file storage and sharedpreferences storage, four kinds of

Course Objectives:Several ways to master data storage in AndroidProficient in using Preferenceactivitypreferencescreen to do professional setting functionProficient in using SQLite3 to store dataIn-depth study of SQLite3 database features, and compared to large databases including stored procedures, the main foreign key association and other characteristicsLearn about the internal and external

Android provides four data storage methods. Because Android data is basically privateProgramTo use the data, you must use the contentproviders provided by Android. Four

activity becomes " easy " to be destroyed by the system, the activity of the onsaveinstancestate will be executed, unless the activity is actively destroyed by the user , such as when the user presses the back key.结合我们以上的例子，其实都在说明一个词，就是**被动**。当Activity并不是由我主动点击back键而丧失焦点时，onSaveInstanceState方法就一定会调用。就例如我上述列举的那些除了点击back键的“**突发情况**”。 Where to call:In the demo I wrote,Onsaveinstancestate 's call was between OnPause and onStop (The life cycle method for activity, Will explain

SharedPreferences is a lightweight storage class on the Android platform. It stores common configurations such as window status and usernames and passwords for Logon in some default greeting languages. Generally, the onSaveInstanceState in the Activity is reloaded and generally stored using SharedPreferences. It provides regular Long integer, Int integer, and String sto