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Android 0.0.0 Developer Preview
belongs to Maven artifact androidx.preference:preference:1.1.0-alpha01

SeekBarPreference

public class SeekBarPreference
extends Preference

java.lang.Object
   ↳ androidx.preference.Preference
     ↳ androidx.preference.SeekBarPreference


Preference based on android.preference.SeekBarPreference but uses support v7 preference as base. It contains a title and a seekbar and an optional seekbar value TextView. The actual preference layout is customizable by setting android:layout on the preference widget layout or seekBarPreferenceStyle attribute. The seekbar within the preference can be defined adjustable or not by setting adjustable attribute. If adjustable, the preference will be responsive to DPAD left/right keys. Otherwise, it skips those keys. The seekbar value view can be shown or disabled by setting showSeekBarValue attribute to true or false, respectively. Other SeekBar specific attributes (e.g. title, summary, defaultValue, min, max) can be set directly on the preference widget layout.

Summary

Inherited XML attributes

Inherited constants

Public constructors

SeekBarPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)
SeekBarPreference(Context context, AttributeSet attrs, int defStyleAttr)
SeekBarPreference(Context context, AttributeSet attrs)
SeekBarPreference(Context context)

Public methods

int getMax()
int getMin()
final int getSeekBarIncrement()

Returns the amount of increment change via each arrow key click.

int getValue()
boolean isAdjustable()
void onBindViewHolder(PreferenceViewHolder view)

Binds the created View to the data for this Preference.

void setAdjustable(boolean adjustable)
final void setMax(int max)
void setMin(int min)
final void setSeekBarIncrement(int seekBarIncrement)

Sets the increment amount on the SeekBar for each arrow key press.

void setValue(int seekBarValue)

Protected methods

Object onGetDefaultValue(TypedArray a, int index)

Called when a Preference is being inflated and the default value attribute needs to be read.

void onRestoreInstanceState(Parcelable state)

Hook allowing a Preference to re-apply a representation of its internal state that had previously been generated by onSaveInstanceState().

Parcelable onSaveInstanceState()

Hook allowing a Preference to generate a representation of its internal state that can later be used to create a new instance with that same state.

void onSetInitialValue(Object defaultValue)

Implement this to set the initial value of the preference.

Inherited methods

Public constructors

SeekBarPreference

public SeekBarPreference (Context context, 
                AttributeSet attrs, 
                int defStyleAttr, 
                int defStyleRes)

Parameters
context Context

attrs AttributeSet

defStyleAttr int

defStyleRes int

SeekBarPreference

public SeekBarPreference (Context context, 
                AttributeSet attrs, 
                int defStyleAttr)

Parameters
context Context

attrs AttributeSet

defStyleAttr int

SeekBarPreference

public SeekBarPreference (Context context, 
                AttributeSet attrs)

Parameters
context Context

attrs AttributeSet

SeekBarPreference

public SeekBarPreference (Context context)

Parameters
context Context

Public methods

getMax

public int getMax ()

Returns
int

getMin

public int getMin ()

Returns
int

getSeekBarIncrement

public final int getSeekBarIncrement ()

Returns the amount of increment change via each arrow key click. This value is derived from user's specified increment value if it's not zero. Otherwise, the default value is picked from the default mKeyProgressIncrement value in AbsSeekBar.

Returns
int The amount of increment on the SeekBar performed after each user's arrow key press.

getValue

public int getValue ()

Returns
int

isAdjustable

public boolean isAdjustable ()

Returns
boolean

onBindViewHolder

public void onBindViewHolder (PreferenceViewHolder view)

Binds the created View to the data for this Preference.

This is a good place to grab references to custom Views in the layout and set properties on them.

Make sure to call through to the superclass's implementation.

Parameters
view PreferenceViewHolder: The ViewHolder that provides references to the views to fill in. These views will be recycled, so you should not hold a reference to them after this method returns.

setAdjustable

public void setAdjustable (boolean adjustable)

Parameters
adjustable boolean

setMax

public final void setMax (int max)

Parameters
max int

setMin

public void setMin (int min)

Parameters
min int

setSeekBarIncrement

public final void setSeekBarIncrement (int seekBarIncrement)

Sets the increment amount on the SeekBar for each arrow key press.

Parameters
seekBarIncrement int: The amount to increment or decrement when the user presses an arrow key.

setValue

public void setValue (int seekBarValue)

Parameters
seekBarValue int

Protected methods

onGetDefaultValue

protected Object onGetDefaultValue (TypedArray a, 
                int index)

Called when a Preference is being inflated and the default value attribute needs to be read. Since different Preference types have different value types, the subclass should get and return the default value which will be its value type.

For example, if the value type is String, the body of the method would proxy to TypedArray.getString(int).

Parameters
a TypedArray: The set of attributes.

index int: The index of the default value attribute.

Returns
Object The default value of this preference type.

onRestoreInstanceState

protected void onRestoreInstanceState (Parcelable state)

Hook allowing a Preference to re-apply a representation of its internal state that had previously been generated by onSaveInstanceState(). This function will never be called with a null state.

Parameters
state Parcelable: The saved state that had previously been returned by onSaveInstanceState().

onSaveInstanceState

protected Parcelable onSaveInstanceState ()

Hook allowing a Preference to generate a representation of its internal state that can later be used to create a new instance with that same state. This state should only contain information that is not persistent or can be reconstructed later.

Returns
Parcelable A Parcelable object containing the current dynamic state of this preference, or null if there is nothing interesting to save. The default implementation returns null.

onSetInitialValue

added in version 1.0.0
protected void onSetInitialValue (Object defaultValue)

Implement this to set the initial value of the preference.

If you are persisting values to SharedPreferences or a PreferenceDataStore you should restore the saved value for the preference.

If you are not persisting values, or there is no value saved for the preference, you should set the value of the preference to defaultValue.

Parameters
defaultValue Object: The default value for the preference if set, otherwise null.