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Android Reference

ComponentName


android.content

Class ComponentName

    • Constructor Detail

      • ComponentName

        public ComponentName(String pkg,
                     String cls)
        Create a new component identifier.
        Parameters:
        pkg - The name of the package that the component exists in. Can not be null.
        cls - The name of the class inside of pkg that implements the component. Can not be null.
      • ComponentName

        public ComponentName(Context pkg,
                     String cls)
        Create a new component identifier from a Context and class name.
        Parameters:
        pkg - A Context for the package implementing the component, from which the actual package name will be retrieved.
        cls - The name of the class inside of pkg that implements the component.
      • ComponentName

        public ComponentName(Context pkg,
                     Class<?> cls)
        Create a new component identifier from a Context and Class object.
        Parameters:
        pkg - A Context for the package implementing the component, from which the actual package name will be retrieved.
        cls - The Class object of the desired component, from which the actual class name will be retrieved.
      • ComponentName

        public ComponentName(Parcel in)
        Instantiate a new ComponentName from the data in a Parcel that was previously written with writeToParcel(Parcel, int). Note that you must not use this with data written by writeToParcel(ComponentName, Parcel) since it is not possible to handle a null ComponentObject here.
        Parameters:
        in - The Parcel containing the previously written ComponentName, positioned at the location in the buffer where it was written.
    • Method Detail

      • clone

        public ComponentName clone()
        Description copied from class: Object
        Creates and returns a copy of this Object. The default implementation returns a so-called "shallow" copy: It creates a new instance of the same class and then copies the field values (including object references) from this instance to the new instance. A "deep" copy, in contrast, would also recursively clone nested objects. A subclass that needs to implement this kind of cloning should call super.clone() to create the new instance and then create deep copies of the nested, mutable objects.
        Overrides:
        clone in class Object
        Returns:
        a copy of this object.
      • getPackageName

        public String getPackageName()
        Return the package name of this component.
      • getClassName

        public String getClassName()
        Return the class name of this component.
      • getShortClassName

        public String getShortClassName()
        Return the class name, either fully qualified or in a shortened form (with a leading '.') if it is a suffix of the package.
      • flattenToString

        public String flattenToString()
        Return a String that unambiguously describes both the package and class names contained in the ComponentName. You can later recover the ComponentName from this string through unflattenFromString(String).
        Returns:
        Returns a new String holding the package and class names. This is represented as the package name, concatenated with a '/' and then the class name.
        See Also:
        unflattenFromString(String)
      • flattenToShortString

        public String flattenToShortString()
        The same as flattenToString(), but abbreviates the class name if it is a suffix of the package. The result can still be used with unflattenFromString(String).
        Returns:
        Returns a new String holding the package and class names. This is represented as the package name, concatenated with a '/' and then the class name.
        See Also:
        unflattenFromString(String)
      • unflattenFromString

        public static ComponentName unflattenFromString(String str)
        Recover a ComponentName from a String that was previously created with flattenToString(). It splits the string at the first '/', taking the part before as the package name and the part after as the class name. As a special convenience (to use, for example, when parsing component names on the command line), if the '/' is immediately followed by a '.' then the final class name will be the concatenation of the package name with the string following the '/'. Thus "com.foo/.Blah" becomes package="com.foo" .
        Parameters:
        str - The String that was returned by flattenToString().
        Returns:
        Returns a new ComponentName containing the package and class names that were encoded in str
        See Also:
        flattenToString()
      • toShortString

        public String toShortString()
        Return string representation of this class without the class's name as a prefix.
      • toString

        public String toString()
        Description copied from class: Object
        Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
           getClass().getName() + '@' + Integer.toHexString(hashCode())

        See Writing a useful toString method if you intend implementing your own toString method.

        Overrides:
        toString in class Object
        Returns:
        a printable representation of this object.
      • equals

        public boolean equals(Object obj)
        Description copied from class: Object
        Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must represent the same object as this instance using a class-specific comparison. The general contract is that this comparison should be reflexive, symmetric, and transitive. Also, no object reference other than null is equal to null.

        The default implementation returns true only if this == o. See Writing a correct equals method if you intend implementing your own equals method.

        The general contract for the equals and Object.hashCode() methods is that if equals returns true for any two objects, then hashCode() must return the same value for these objects. This means that subclasses of Object usually override either both methods or neither of them.

        Overrides:
        equals in class Object
        Parameters:
        obj - the object to compare this instance with.
        Returns:
        true if the specified object is equal to this Object; false otherwise.
        See Also:
        Object.hashCode()
      • hashCode

        public int hashCode()
        Description copied from class: Object
        Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

        Note that hash values must not change over time unless information used in equals comparisons also changes.

        See Writing a correct hashCode method if you intend implementing your own hashCode method.

        Overrides:
        hashCode in class Object
        Returns:
        this object's hash code.
        See Also:
        Object.equals(java.lang.Object)
      • compareTo

        public int compareTo(ComponentName that)
        Description copied from interface: Comparable
        Compares this object to the specified object to determine their relative order.
        Specified by:
        compareTo in interface Comparable<ComponentName>
        Parameters:
        that - the object to compare to this instance.
        Returns:
        a negative integer if this instance is less than another; a positive integer if this instance is greater than another; 0 if this instance has the same order as another.
      • describeContents

        public int describeContents()
        Description copied from interface: Parcelable
        Describe the kinds of special objects contained in this Parcelable's marshalled representation.
        Specified by:
        describeContents in interface Parcelable
        Returns:
        a bitmask indicating the set of special object types marshalled by the Parcelable.
      • writeToParcel

        public static void writeToParcel(ComponentName c,
                         Parcel out)
        Write a ComponentName to a Parcel, handling null pointers. Must be read with readFromParcel(Parcel).
        Parameters:
        c - The ComponentName to be written.
        out - The Parcel in which the ComponentName will be placed.
        See Also:
        readFromParcel(Parcel)


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