Android小记-SQLiteOpenHelper正确使用避免leak

public class DatabaseHelper extends SQLiteOpenHelper {

private static DatabaseHelper sInstance;

private static final String DATABASE_NAME = "database_name";
private static final String DATABASE_TABLE = "table_name";
private static final int DATABASE_VERSION = 1;

public static synchronized DatabaseHelper getInstance(Context context) {

// Use the application context, which will ensure that you
// don't accidentally leak an Activity's context.
// See this article for more information: http://bit.ly/6LRzfx if (sInstance == null) {
sInstance = new DatabaseHelper(context.getApplicationContext());
}
return sInstance;
}

/**
* Constructor should be private to prevent direct instantiation.
* make call to static method "getInstance()" instead.
*/
private DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
}

// 下面方法用于校验某个database
private static boolean checkDatabase() {
SQLiteDatabase checkDB = null;

try {
String myPath = "YourDatabasePath";
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
checkDB.close();

} catch (Exception ex) {

}

return checkDB != null ? true : false;
}