Package icyllis.modernui.graphics.drawable

Interface Drawable.Callback

All Known Implementing Classes:

AbsListView, AbsoluteLayout, AbsSeekBar, AbsSpinner, AdapterView, AnimationDrawable, Button, CheckableImageButton, CheckBox, ClipDrawable, ColorStateListDrawable, CompoundButton, CoordinatorLayout, DrawableContainer, DrawableWrapper, DropDownListView, EditText, ExpandableListView, FragmentContainerView, FrameLayout, GridLayout, GridView, HorizontalScrollView, ImageButton, ImageView, InsetDrawable, LayerDrawable, LevelListDrawable, LinearLayout, LinearPagerIndicator, ListView, MaterialCheckBox, MaterialRadioButton, NestedScrollView, ProgressBar, RadioButton, RadioGroup, RelativeLayout, RelativeRadioGroup, RippleDrawable, ScaleDrawable, ScrollView, SeekBar, Spinner, StateListDrawable, Switch, SwitchButton, TabLayout, TabLayout.TabView, TableLayout, TableRow, TestFragment.TestLinearLayout, TextView, ToggleButton, View, ViewGroup, ViewPager

Enclosing class:

Drawable

public static interface Drawable.Callback

Implement this interface if you want to create an animated drawable that extends Drawable. Upon retrieving a drawable, use Drawable.setCallback(Callback) to supply your implementation of the interface to the drawable; it uses this interface to schedule and execute animation changes.

Method Summary

Modifier and Type	Method	Description
void	invalidateDrawable(Drawable who)	Called when the drawable needs to be redrawn.
void	scheduleDrawable(Drawable who, Runnable what, long when)	A Drawable can call this to schedule the next frame of its animation.
void	unscheduleDrawable(Drawable who, Runnable what)	A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(icyllis.modernui.graphics.drawable.Drawable, java.lang.Runnable, long).

Method Details

invalidateDrawable

void invalidateDrawable(@NonNull
 Drawable who)

Called when the drawable needs to be redrawn. A view at this point should invalidate itself (or at least the part of itself where the drawable appears).

Parameters:

who - The drawable that is requesting the update.

scheduleDrawable

void scheduleDrawable(@NonNull
 Drawable who,
 @NonNull
 Runnable what,
 long when)

A Drawable can call this to schedule the next frame of its animation. An implementation can generally simply call Handler.postAtTime(Runnable, Object, long) with the parameters (what, who, when) to perform the scheduling.

Parameters:

who - The drawable being scheduled.

what - The action to execute.

when - The time (in milliseconds) to run. The timebase is Core.timeMillis()

unscheduleDrawable

void unscheduleDrawable(@NonNull
 Drawable who,
 @NonNull
 Runnable what)

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(icyllis.modernui.graphics.drawable.Drawable, java.lang.Runnable, long). An implementation can generally simply call Handler.removeCallbacks(Runnable, Object) with the parameters (what, who) to unschedule the drawable.

Parameters:

who - The drawable being unscheduled.

what - The action being unscheduled.