public final class ContentValues
extends Object
implements Parcelable
java.lang.Object | |
↳ | android.content.ContentValues |
This class is used to store a set of values that the ContentResolver
can process.
Constants |
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String |
TAG
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Inherited constants |
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![]() android.os.Parcelable
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Fields |
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public static final Creator<ContentValues> |
CREATOR
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Public constructors |
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ContentValues() Creates an empty set of values using the default initial size |
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ContentValues(int size) Creates an empty set of values using the given initial size |
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ContentValues(ContentValues from) Creates a set of values copied from the given set |
Public methods |
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void |
clear() Removes all values. |
boolean |
containsKey(String key) Returns true if this object has the named value. |
int |
describeContents() Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
boolean |
equals(Object object) Indicates whether some other object is "equal to" this one. |
Object |
get(String key) Gets a value. |
Boolean |
getAsBoolean(String key) Gets a value and converts it to a Boolean. |
Byte |
getAsByte(String key) Gets a value and converts it to a Byte. |
byte[] |
getAsByteArray(String key) Gets a value that is a byte array. |
Double |
getAsDouble(String key) Gets a value and converts it to a Double. |
Float |
getAsFloat(String key) Gets a value and converts it to a Float. |
Integer |
getAsInteger(String key) Gets a value and converts it to an Integer. |
Long |
getAsLong(String key) Gets a value and converts it to a Long. |
Short |
getAsShort(String key) Gets a value and converts it to a Short. |
String |
getAsString(String key) Gets a value and converts it to a String. |
int |
hashCode() Returns a hash code value for the object. |
Set<String> |
keySet() Returns a set of all of the keys |
void |
put(String key, Short value) Adds a value to the set. |
void |
put(String key, Long value) Adds a value to the set. |
void |
put(String key, Double value) Adds a value to the set. |
void |
put(String key, Integer value) Adds a value to the set. |
void |
put(String key, String value) Adds a value to the set. |
void |
put(String key, Boolean value) Adds a value to the set. |
void |
put(String key, Float value) Adds a value to the set. |
void |
put(String key, byte[] value) Adds a value to the set. |
void |
put(String key, Byte value) Adds a value to the set. |
void |
putAll(ContentValues other) Adds all values from the passed in ContentValues. |
void |
putNull(String key) Adds a null value to the set. |
void |
remove(String key) Remove a single value. |
int |
size() Returns the number of values. |
String |
toString() Returns a string containing a concise, human-readable description of this object. |
Set<Entry<String, Object>> |
valueSet() Returns a set of all of the keys and values |
void |
writeToParcel(Parcel parcel, int flags) Flatten this object in to a Parcel. |
Inherited methods |
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![]() java.lang.Object
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![]() android.os.Parcelable
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ContentValues ()
Creates an empty set of values using the default initial size
ContentValues (int size)
Creates an empty set of values using the given initial size
Parameters | |
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size |
int : the initial size of the set of values |
ContentValues (ContentValues from)
Creates a set of values copied from the given set
Parameters | |
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from |
ContentValues : the values to copy |
boolean containsKey (String key)
Returns true if this object has the named value.
Parameters | |
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key |
String : the value to check for |
Returns | |
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boolean |
true if the value is present, false otherwise |
int describeContents ()
Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(Parcel, int)
, the return value of this method must include the CONTENTS_FILE_DESCRIPTOR
bit.
Returns | |
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int |
a bitmask indicating the set of special object types marshaled by this Parcelable object instance. |
boolean equals (Object object)
Indicates whether some other object is "equal to" this one.
The equals
method implements an equivalence relation on non-null object references:
x
, x.equals(x)
should return true
. x
and y
, x.equals(y)
should return true
if and only if y.equals(x)
returns true
. x
, y
, and z
, if x.equals(y)
returns true
and y.equals(z)
returns true
, then x.equals(z)
should return true
. x
and y
, multiple invocations of x.equals(y)
consistently return true
or consistently return false
, provided no information used in equals
comparisons on the objects is modified. x
, x.equals(null)
should return false
. The equals
method for class Object
implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x
and y
, this method returns true
if and only if x
and y
refer to the same object (x == y
has the value true
).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the general contract for the hashCode
method, which states that equal objects must have equal hash codes.
Parameters | |
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object |
Object : the reference object with which to compare. |
Returns | |
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boolean |
true if this object is the same as the obj argument; false otherwise. |
Object get (String key)
Gets a value. Valid value types are String
, Boolean
, Number
, and byte[]
implementations.
Parameters | |
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key |
String : the value to get |
Returns | |
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Object |
the data for the value, or null if the value is missing or if null was previously added with the given key |
Boolean getAsBoolean (String key)
Gets a value and converts it to a Boolean.
Parameters | |
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key |
String : the value to get |
Returns | |
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Boolean |
the Boolean value, or null if the value is missing or cannot be converted |
Byte getAsByte (String key)
Gets a value and converts it to a Byte.
Parameters | |
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key |
String : the value to get |
Returns | |
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Byte |
the Byte value, or null if the value is missing or cannot be converted |
byte[] getAsByteArray (String key)
Gets a value that is a byte array. Note that this method will not convert any other types to byte arrays.
Parameters | |
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key |
String : the value to get |
Returns | |
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byte[] |
the byte[] value, or null is the value is missing or not a byte[] |
Double getAsDouble (String key)
Gets a value and converts it to a Double.
Parameters | |
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key |
String : the value to get |
Returns | |
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Double |
the Double value, or null if the value is missing or cannot be converted |
Float getAsFloat (String key)
Gets a value and converts it to a Float.
Parameters | |
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key |
String : the value to get |
Returns | |
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Float |
the Float value, or null if the value is missing or cannot be converted |
Integer getAsInteger (String key)
Gets a value and converts it to an Integer.
Parameters | |
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key |
String : the value to get |
Returns | |
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Integer |
the Integer value, or null if the value is missing or cannot be converted |
Long getAsLong (String key)
Gets a value and converts it to a Long.
Parameters | |
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key |
String : the value to get |
Returns | |
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Long |
the Long value, or null if the value is missing or cannot be converted |
Short getAsShort (String key)
Gets a value and converts it to a Short.
Parameters | |
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key |
String : the value to get |
Returns | |
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Short |
the Short value, or null if the value is missing or cannot be converted |
String getAsString (String key)
Gets a value and converts it to a String.
Parameters | |
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key |
String : the value to get |
Returns | |
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String |
the String for the value |
int hashCode ()
Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap
.
The general contract of hashCode
is:
hashCode
method must consistently return the same integer, provided no information used in equals
comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. equals(Object)
method, then calling the hashCode
method on each of the two objects must produce the same integer result. equals(java.lang.Object)
method, then calling the hashCode
method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. As much as is reasonably practical, the hashCode method defined by class Object
does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)
Returns | |
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int |
a hash code value for this object. |
Set<String> keySet ()
Returns a set of all of the keys
Returns | |
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Set<String> |
a set of all of the keys |
void put (String key, Short value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
Short : the data for the value to put |
void put (String key, Long value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
Long : the data for the value to put |
void put (String key, Double value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
Double : the data for the value to put |
void put (String key, Integer value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
Integer : the data for the value to put |
void put (String key, String value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
String : the data for the value to put |
void put (String key, Boolean value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
Boolean : the data for the value to put |
void put (String key, Float value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
Float : the data for the value to put |
void put (String key, byte[] value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
byte : the data for the value to put |
void put (String key, Byte value)
Adds a value to the set.
Parameters | |
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key |
String : the name of the value to put |
value |
Byte : the data for the value to put |
void putAll (ContentValues other)
Adds all values from the passed in ContentValues.
Parameters | |
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other |
ContentValues : the ContentValues from which to copy |
void putNull (String key)
Adds a null value to the set.
Parameters | |
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key |
String : the name of the value to make null |
void remove (String key)
Remove a single value.
Parameters | |
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key |
String : the name of the value to remove |
int size ()
Returns the number of values.
Returns | |
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int |
the number of values |
String toString ()
Returns a string containing a concise, human-readable description of this object.
Returns | |
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String |
a printable representation of this object. |
Set<Entry<String, Object>> valueSet ()
Returns a set of all of the keys and values
Returns | |
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Set<Entry<String, Object>> |
a set of all of the keys and values |
void writeToParcel (Parcel parcel, int flags)
Flatten this object in to a Parcel.
Parameters | |
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parcel |
Parcel : The Parcel in which the object should be written. |
flags |
int : Additional flags about how the object should be written. May be 0 or PARCELABLE_WRITE_RETURN_VALUE . |