Resolve Android access technical issues

In Android, there are several data storage methods, such as file storage and file database storage. Android comes with an SQLite database, embedded developers are not familiar with this cross-platform local file database.

In Android, a new method is proposed for data access. The ContentProvider method is similar to the ContentProvider method of MS, OLEDB, and ODBC unified data mode. First, let's take a look at the use of SQLite in Android. The simplest way to use it in Android is to use openorCreateDatabase of the Context object. Let's take a look at a piece of code:

 
 

  
  
Private String getName ()
  
  
{
  
  
String name = null;
  
  
Cursor cur = this. getContentResolver (). query (ProviderConst. MY_TEST_URI, new String [] {"id", "name"}, null );
  
  
If (cur = null)
  
  
Return null;
  
  
Cur. moveToFirst ();
  
  
Do
  
  
{
  
  
Namename = name + cur. getString (1) + "\ n ";
  
  

  
  
} While (cur. moveToNext ());
  
  

  
  
Return name;
  
  
}
  
  
We can also use:
  
  
Private String getName ()
  
  
{
  
  
String name = null;
  
  
Cursor cur = this. managedQuery (ProviderConst. MY_TEST_URI, new String [] {"id", "name"}, null );
  
  
If (cur = null)
  
  
Return null;
  
  
Cur. moveToFirst ();
  
  
Do
  
  
{
  
  
Namename = name + cur. getString (1) + "\ n ";
  
  

  
  
} While (cur. moveToNext ());
  
  

  
  
Return name;
  
  
}
 
 

We have understood the simple usage method, so let's analyze the complicated content.