Android AttributeSet API

Android AttributeSet API
Android AttributeSet API
Public interfaceAttributeSet

Android. util. AttributeSet

Known indirect subclass XmlResourceParser

Class Overview

A set of attributes is usually used in xml documents. Generally, you do not want to use it directly, but use it by Resources. Theme. obtainStyledAttributes () that can explain the attributes for you. In particular, the Resources API will convert the referenced Resources (like "@ string/my_label" in the. xml file) to your desired type. If you use AttributeSet directly, you need to manually check your resource application (through getAttributeResourceValue (int, int), and you need to find the resource yourself if necessary. Using AttributeSet directly will also damage the themes and styles of the Application during attribute check.

This interface also provides Xml by using XmlPullParser. the asAttributeSet () method is efficient from compiled. the xml file data retrieval mechanism usually returns an interface implemented through XmlPullParser, but it is more useful when compiling XML resources:

 XmlPullParser parser = resources.getXml(myResouce); AttributeSet attributes = Xml.asAttributeSet(parser);

This implementation method is not like the integrated implementation of XmlPullParser. When compiling your resources, it efficiently optimizes the search for the budget information generated by the appt, such as getAttributeFloatValue (int, float) the returned result is a floating point number that has been stored in your compilation resources, rather than the runtime. /original string in xml file

This excuse also provides additional information contained in the compiled xml file that does not exist in the original xml file. For example, getAttributeNameResource (int) returns the Resource Identifier attribute name associated with the specific XML.

Overview

Public Method
Abstract boolean	GetAttributeBooleanValue (String namespace, String attribute, boolean defaultValue) Returns the Boolean value of 'attribute'. The default value is defaultValue.
Abstract boolean	GetAttributeBooleanValue (int index, boolean defaultValue) Returns the Boolean value of 'attribute' whose serial number is index. The default value is defaultValue.
Abstract int	GetAttributeCount () Returns the number of attributes in the attribute set.
Abstract float	GetAttributeFloatValue (int index, float defaultValue) Return the float value of attribute at 'index '.
Abstract float	GetAttributeFloatValue (String namespace, String attribute, float defaultValue) Return the float value of 'attribute '.
Abstract int	GetAttributeIntValue (String namespace, String attribute, int defaultValue) Return the integer value of 'attribute '.
Abstract int	GetAttributeIntValue (int index, int defaultValue) Return the integer value of attribute at 'index '.
Abstract int	GetAttributeListValue (String namespace, String attribute, String [] options, int defaultValue) Return the index of the value of 'attribute' in the list 'options '.
Abstract int	GetAttributeListValue (int index, String [] options, int defaultValue) Return the index of the value of attribute at 'index' in the list'options '.
Abstract String	GetAttributeName (int index) Returns the name of the specified attribute.
Abstract int	GetAttributeNameResource (int index) Return the resource ID associated with the given attribute name.
Abstract int	GetAttributeResourceValue (String namespace, String attribute, int defaultValue) Return the value of 'attribute' as a resource identifier.
Abstract int	GetAttributeResourceValue (int index, int defaultValue) Return the value of attribute at 'index' as a resource identifier.
Abstract int	GetAttributeUnsignedIntValue (int index, int defaultValue) Return the integer value of attribute at 'index' that is formatted as an unsigned value.
Abstract int	GetAttributeUnsignedIntValue (String namespace, String attribute, int defaultValue) Return the boolean value of 'attribute' that is formatted as an unsigned value.
Abstract String	GetAttributeValue (int index) Returns the value of the specified attribute as a string representation.
Abstract String	GetAttributeValue (String namespace, String name) Returns the value of the specified attribute as a string representation.
Abstract String	GetClassAttribute () Return the value of the "class" attribute or null if there is not one.
Abstract String	GetIdAttribute () Return the value of the "id" attribute or null if there is not one.
Abstract int	GetIdAttributeResourceValue (int defaultValue) Return the integer value of the "id" attribute or defaultValue if there is none.
Abstract String	GetPositionDescription () Returns a description of the current position of the attribute set.
Abstract int	GetStyleAttribute () Return the value of the "style" attribute or 0 if there is not one.

Public method public abstract boolean getAttributeBooleanValue (String namespace, String attribute, boolean defaultValue) added to API Level 1

Return the boolean value of 'attribute '.

Parameters

Namespace	The 'attribute' namespace to be retrieved
Attribute	The 'attribute' to be retrieved'
DefaultValue	Default return value not found in 'attribute'

Return Value

• Resulting value. public abstract boolean getAttributeBooleanValue (int index, boolean defaultValue) added to API Level 1

  Return the boolean value of attribute at 'index '.

  Parameters

  Index	Index of the desired attribute, 0... count-1.
  DefaultValue	What to return if the attribute isn' t found.

  Return Value
  • Resulting value. public abstract int getAttributeCount () added to API Level 1

    Returns the number of attributes available in the set.

    Return Value
    • A positive integer, or 0 if the set is empty. public abstract float getAttributeFloatValue (int index, float defaultValue) is added to API Level 1

      Return the float value of attribute at 'index '.

      Parameters

      Index	Index of the desired attribute, 0... count-1.
      DefaultValue	What to return if the attribute isn' t found.

      Return Value
      • Resulting value. public abstract float getAttributeFloatValue (String namespace, String attribute, float defaultValue) added to API Level 1

        Return the float value of 'attribute '.

        Parameters

        Namespace	Namespace of attribute to retrieve.
        Attribute	The attribute to retrieve.
        DefaultValue	What to return if the attribute isn' t found.

        Return Value
        • Resulting value. public abstract int getAttributeIntValue (String namespace, String attribute, int defaultValue) added to API Level 1

          Return the integer value of 'attribute '.

          Parameters

          Namespace	Namespace of attribute to retrieve.
          Attribute	The attribute to retrieve.
          DefaultValue	What to return if the attribute isn' t found.

          Return Value
          • Resulting value. public abstract int getAttributeIntValue (int index, int defaultValue) added to API Level 1

            Return the integer value of attribute at 'index '.

            Parameters

            Index	Index of the desired attribute, 0... count-1.
            DefaultValue	What to return if the attribute isn' t found.

            Return Value
            • Resulting value. public abstract int getAttributeListValue (String namespace, String attribute, String [] options, int defaultValue) added to API Level 1

              Return the index of the value of 'attribute' in the list 'options '.

              Parameters

              Namespace	Namespace of attribute to retrieve.
              Attribute	Name of attribute to retrieve.
              Options	List of strings whose values we are checking against.
              DefaultValue	Value returned if attribute doesn't exist or no match is found.

              Return Value
              • Index in to 'options' or defaultValue. public abstract int getAttributeListValue (int index, String [] options, int defaultValue) added to API Level 1

                Return the index of the value of attribute at 'index' in the list'options '.

                Parameters

                Index	Index of the desired attribute, 0... count-1.
                Options	List of strings whose values we are checking against.
                DefaultValue	Value returned if attribute doesn't exist or no match is found.

                Return Value
                • Index in to 'options' or defaultValue. public abstract String getAttributeName (int index) added to API Level 1

                  Returns the name of the specified attribute.

                  Parameters

                  Index	Index of the desired attribute, 0... count-1.

                  Return Value
                  • A String containing the name of the attribute, or null if the attribute cannot be found. public abstract int getAttributeNameResource (int index) is added to API Level 1

                    Return the resource ID associated with the given attribute name. This will be the identifier for an attribute resource, which can be used by styles. Returns 0 if there is no resource associated with this attribute.

                    Note that this is differentgetAttributeResourceValue(int, int)In that it returns a resource identifier for the attribute name; the other method returns this attribute's value as a resource identifier.

                    Parameters

                    Index	Index of the desired attribute, 0... count-1.

                    Return Value
                    • The resource identifier, 0 if none. public abstract int getAttributeResourceValue (String namespace, String attribute, int defaultValue) is added to API Level 1

                      Return the value of 'attribute' as a resource identifier.

                      Note that this is differentgetAttributeNameResource(int)In that it returns a value contained in this attribute as a resource identifier (I. e ., a value originally of the form "@ package: type/resource"); the other method returns a resource identifier that identifies the name of the attribute.

                      Parameters

                      Namespace	Namespace of attribute to retrieve.
                      Attribute	The attribute to retrieve.
                      DefaultValue	What to return if the attribute isn' t found.

                      Return Value
                      • Resulting value. public abstract int getAttributeResourceValue (int index, int defaultValue) added to API Level 1

                        Return the value of attribute at 'index' as a resource identifier.

                        Note that this is differentgetAttributeNameResource(int)In that it returns a value contained in this attribute as a resource identifier (I. e ., a value originally of the form "@ package: type/resource"); the other method returns a resource identifier that identifies the name of the attribute.

                        Parameters

                        Index	Index of the desired attribute, 0... count-1.
                        DefaultValue	What to return if the attribute isn' t found.

                        Return Value
                        • Resulting value. public abstract int getAttributeUnsignedIntValue (int index, int defaultValue) added to API Level 1

                          Return the integer value of attribute at 'index' that is formatted as an unsigned value. In particle, the formats 0xn... n and # n... n are handled.

                          Parameters

                          Index	Index of the desired attribute, 0... count-1.
                          DefaultValue	What to return if the attribute isn' t found.

                          Return Value
                          • Resulting value. public abstract int getAttributeUnsignedIntValue (String namespace, String attribute, int defaultValue) added to API Level 1

                            Return the boolean value of 'attribute' that is formatted as an unsigned value. In particle, the formats 0xn... n and # n... n are handled.

                            Parameters

                            Namespace	Namespace of attribute to retrieve.
                            Attribute	The attribute to retrieve.
                            DefaultValue	What to return if the attribute isn' t found.

                            Return Value
                            • Resulting value. public abstract String getAttributeValue (int index) added to API Level 1

                              Returns the value of the specified attribute as a string representation.

                              Parameters

                              Index	Index of the desired attribute, 0... count-1.

                              Return Value
                              • A String containing the value of the attribute, or null if the attribute cannot be found. public abstract String getAttributeValue (String namespace, String name) is added to API Level 1

                                Returns the value of the specified attribute as a string representation. The lookup is already med using the attribute name.

                                Parameters

                                Namespace	The namespace of the attribute to get the value from.
                                Name	The name of the attribute to get the value from.

                                Return Value
                                • A String containing the value of the attribute, or null if the attribute cannot be found. public abstract String getClassAttribute () is added to API Level 1

                                  Return the value of the "class" attribute or null if there is not one. Equivalent to getAttributeValue (null, "class ").

                                  Return Value
                                  • The class attribute's value or null. public abstract String getIdAttribute () added to API Level 1

                                    Return the value of the "id" attribute or null if there is not one. Equivalent to getAttributeValue (null, "id ").

                                    Return Value
                                    • The id attribute's value or null. public abstract int getIdAttributeResourceValue (int defaultValue) is added to API Level 1

                                      Return the integer value of the "id" attribute or defaultValue if there is none. Equivalent to getAttributeResourceValue (null, "id", defaultValue );

                                      Parameters

                                      DefaultValue	What to return if the "id" attribute isn't found.

                                      Return Value
                                      • Int Resulting value. public abstract String getPositionDescription () added to API Level 1

                                        Returns a description of the current position of the attribute set. For instance, if the attribute set is loaded from an XML document, the position description cocould indicate the current line number.

                                        Return Value
                                        • A string representation of the current position in the set, may be null. public abstract int getStyleAttribute () added to API Level 1

                                          Return the value of the "style" attribute or 0 if there is not one. Equivalent to getAttributeResourceValue (null, "style ").

                                          Return Value
                                          • The style attribute's resource identifier or 0.