Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.animation; |
| 18 | |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 19 | import android.content.res.ConstantState; |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 20 | import android.util.StateSet; |
| 21 | import android.view.View; |
| 22 | |
| 23 | import java.lang.ref.WeakReference; |
| 24 | import java.util.ArrayList; |
| 25 | |
| 26 | /** |
| 27 | * Lets you define a number of Animators that will run on the attached View depending on the View's |
| 28 | * drawable state. |
| 29 | * <p> |
| 30 | * It can be defined in an XML file with the <code><selector></code> element. |
| 31 | * Each State Animator is defined in a nested <code><item></code> element. |
| 32 | * |
| 33 | * @attr ref android.R.styleable#DrawableStates_state_focused |
| 34 | * @attr ref android.R.styleable#DrawableStates_state_window_focused |
| 35 | * @attr ref android.R.styleable#DrawableStates_state_enabled |
| 36 | * @attr ref android.R.styleable#DrawableStates_state_checkable |
| 37 | * @attr ref android.R.styleable#DrawableStates_state_checked |
| 38 | * @attr ref android.R.styleable#DrawableStates_state_selected |
| 39 | * @attr ref android.R.styleable#DrawableStates_state_activated |
| 40 | * @attr ref android.R.styleable#DrawableStates_state_active |
| 41 | * @attr ref android.R.styleable#DrawableStates_state_single |
| 42 | * @attr ref android.R.styleable#DrawableStates_state_first |
| 43 | * @attr ref android.R.styleable#DrawableStates_state_middle |
| 44 | * @attr ref android.R.styleable#DrawableStates_state_last |
| 45 | * @attr ref android.R.styleable#DrawableStates_state_pressed |
| 46 | * @attr ref android.R.styleable#StateListAnimatorItem_animation |
| 47 | */ |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 48 | public class StateListAnimator implements Cloneable { |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 49 | |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 50 | private ArrayList<Tuple> mTuples = new ArrayList<Tuple>(); |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 51 | private Tuple mLastMatch = null; |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 52 | private Animator mRunningAnimator = null; |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 53 | private WeakReference<View> mViewRef; |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 54 | private StateListAnimatorConstantState mConstantState; |
| 55 | private AnimatorListenerAdapter mAnimatorListener; |
| 56 | private int mChangingConfigurations; |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 57 | |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 58 | public StateListAnimator() { |
| 59 | initAnimatorListener(); |
| 60 | } |
| 61 | |
| 62 | private void initAnimatorListener() { |
| 63 | mAnimatorListener = new AnimatorListenerAdapter() { |
| 64 | @Override |
| 65 | public void onAnimationEnd(Animator animation) { |
| 66 | animation.setTarget(null); |
| 67 | if (mRunningAnimator == animation) { |
| 68 | mRunningAnimator = null; |
| 69 | } |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 70 | } |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 71 | }; |
| 72 | } |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 73 | |
| 74 | /** |
| 75 | * Associates the given animator with the provided drawable state specs so that it will be run |
| 76 | * when the View's drawable state matches the specs. |
| 77 | * |
| 78 | * @param specs The drawable state specs to match against |
| 79 | * @param animator The animator to run when the specs match |
| 80 | */ |
| 81 | public void addState(int[] specs, Animator animator) { |
| 82 | Tuple tuple = new Tuple(specs, animator); |
| 83 | tuple.mAnimator.addListener(mAnimatorListener); |
| 84 | mTuples.add(tuple); |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 85 | mChangingConfigurations |= animator.getChangingConfigurations(); |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Returns the current {@link android.animation.Animator} which is started because of a state |
| 90 | * change. |
| 91 | * |
| 92 | * @return The currently running Animator or null if no Animator is running |
| 93 | * @hide |
| 94 | */ |
| 95 | public Animator getRunningAnimator() { |
| 96 | return mRunningAnimator; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * @hide |
| 101 | */ |
| 102 | public View getTarget() { |
| 103 | return mViewRef == null ? null : mViewRef.get(); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Called by View |
| 108 | * @hide |
| 109 | */ |
| 110 | public void setTarget(View view) { |
| 111 | final View current = getTarget(); |
| 112 | if (current == view) { |
| 113 | return; |
| 114 | } |
| 115 | if (current != null) { |
| 116 | clearTarget(); |
| 117 | } |
| 118 | if (view != null) { |
| 119 | mViewRef = new WeakReference<View>(view); |
| 120 | } |
| 121 | |
| 122 | } |
| 123 | |
| 124 | private void clearTarget() { |
| 125 | final int size = mTuples.size(); |
| 126 | for (int i = 0; i < size; i++) { |
| 127 | mTuples.get(i).mAnimator.setTarget(null); |
| 128 | } |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 129 | mViewRef = null; |
| 130 | mLastMatch = null; |
| 131 | mRunningAnimator = null; |
| 132 | } |
| 133 | |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 134 | @Override |
| 135 | public StateListAnimator clone() { |
| 136 | try { |
| 137 | StateListAnimator clone = (StateListAnimator) super.clone(); |
| 138 | clone.mTuples = new ArrayList<Tuple>(mTuples.size()); |
| 139 | clone.mLastMatch = null; |
| 140 | clone.mRunningAnimator = null; |
| 141 | clone.mViewRef = null; |
| 142 | clone.mAnimatorListener = null; |
| 143 | clone.initAnimatorListener(); |
| 144 | final int tupleSize = mTuples.size(); |
| 145 | for (int i = 0; i < tupleSize; i++) { |
| 146 | final Tuple tuple = mTuples.get(i); |
| 147 | final Animator animatorClone = tuple.mAnimator.clone(); |
| 148 | animatorClone.removeListener(mAnimatorListener); |
| 149 | clone.addState(tuple.mSpecs, animatorClone); |
| 150 | } |
| 151 | clone.setChangingConfigurations(getChangingConfigurations()); |
| 152 | return clone; |
| 153 | } catch (CloneNotSupportedException e) { |
| 154 | throw new AssertionError("cannot clone state list animator", e); |
| 155 | } |
| 156 | } |
| 157 | |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 158 | /** |
| 159 | * Called by View |
| 160 | * @hide |
| 161 | */ |
| 162 | public void setState(int[] state) { |
| 163 | Tuple match = null; |
| 164 | final int count = mTuples.size(); |
| 165 | for (int i = 0; i < count; i++) { |
| 166 | final Tuple tuple = mTuples.get(i); |
| 167 | if (StateSet.stateSetMatches(tuple.mSpecs, state)) { |
| 168 | match = tuple; |
| 169 | break; |
| 170 | } |
| 171 | } |
| 172 | if (match == mLastMatch) { |
| 173 | return; |
| 174 | } |
| 175 | if (mLastMatch != null) { |
Yigit Boyar | de5a75e | 2014-06-16 23:31:02 -0700 | [diff] [blame] | 176 | cancel(); |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 177 | } |
| 178 | mLastMatch = match; |
| 179 | if (match != null) { |
| 180 | start(match); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | private void start(Tuple match) { |
| 185 | match.mAnimator.setTarget(getTarget()); |
Yigit Boyar | 8619f48 | 2014-07-15 17:28:07 -0700 | [diff] [blame] | 186 | mRunningAnimator = match.mAnimator; |
Yigit Boyar | de5a75e | 2014-06-16 23:31:02 -0700 | [diff] [blame] | 187 | mRunningAnimator.start(); |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 188 | } |
| 189 | |
Yigit Boyar | de5a75e | 2014-06-16 23:31:02 -0700 | [diff] [blame] | 190 | private void cancel() { |
| 191 | if (mRunningAnimator != null) { |
| 192 | mRunningAnimator.cancel(); |
| 193 | mRunningAnimator = null; |
| 194 | } |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /** |
| 198 | * @hide |
| 199 | */ |
| 200 | public ArrayList<Tuple> getTuples() { |
| 201 | return mTuples; |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * If there is an animation running for a recent state change, ends it. |
| 206 | * <p> |
| 207 | * This causes the animation to assign the end value(s) to the View. |
| 208 | */ |
| 209 | public void jumpToCurrentState() { |
| 210 | if (mRunningAnimator != null) { |
| 211 | mRunningAnimator.end(); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | /** |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 216 | * Return a mask of the configuration parameters for which this animator may change, requiring |
| 217 | * that it be re-created. The default implementation returns whatever was provided through |
| 218 | * {@link #setChangingConfigurations(int)} or 0 by default. |
| 219 | * |
| 220 | * @return Returns a mask of the changing configuration parameters, as defined by |
| 221 | * {@link android.content.pm.ActivityInfo}. |
| 222 | * |
| 223 | * @see android.content.pm.ActivityInfo |
| 224 | * @hide |
| 225 | */ |
| 226 | public int getChangingConfigurations() { |
| 227 | return mChangingConfigurations; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Set a mask of the configuration parameters for which this animator may change, requiring |
| 232 | * that it should be recreated from resources instead of being cloned. |
| 233 | * |
| 234 | * @param configs A mask of the changing configuration parameters, as |
| 235 | * defined by {@link android.content.pm.ActivityInfo}. |
| 236 | * |
| 237 | * @see android.content.pm.ActivityInfo |
| 238 | * @hide |
| 239 | */ |
| 240 | public void setChangingConfigurations(int configs) { |
| 241 | mChangingConfigurations = configs; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Sets the changing configurations value to the union of the current changing configurations |
| 246 | * and the provided configs. |
| 247 | * This method is called while loading the animator. |
| 248 | * @hide |
| 249 | */ |
| 250 | public void appendChangingConfigurations(int configs) { |
| 251 | mChangingConfigurations |= configs; |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Return a {@link android.content.res.ConstantState} instance that holds the shared state of |
| 256 | * this Animator. |
| 257 | * <p> |
| 258 | * This constant state is used to create new instances of this animator when needed. Default |
| 259 | * implementation creates a new {@link StateListAnimatorConstantState}. You can override this |
| 260 | * method to provide your custom logic or return null if you don't want this animator to be |
| 261 | * cached. |
| 262 | * |
| 263 | * @return The {@link android.content.res.ConstantState} associated to this Animator. |
| 264 | * @see android.content.res.ConstantState |
| 265 | * @see #clone() |
| 266 | * @hide |
| 267 | */ |
| 268 | public ConstantState<StateListAnimator> createConstantState() { |
| 269 | return new StateListAnimatorConstantState(this); |
| 270 | } |
| 271 | |
| 272 | /** |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 273 | * @hide |
| 274 | */ |
| 275 | public static class Tuple { |
| 276 | |
| 277 | final int[] mSpecs; |
| 278 | |
| 279 | final Animator mAnimator; |
| 280 | |
| 281 | private Tuple(int[] specs, Animator animator) { |
| 282 | mSpecs = specs; |
| 283 | mAnimator = animator; |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * @hide |
| 288 | */ |
| 289 | public int[] getSpecs() { |
| 290 | return mSpecs; |
| 291 | } |
| 292 | |
| 293 | /** |
| 294 | * @hide |
| 295 | */ |
| 296 | public Animator getAnimator() { |
| 297 | return mAnimator; |
| 298 | } |
| 299 | } |
Yigit Boyar | d422dc3 | 2014-09-25 12:23:35 -0700 | [diff] [blame] | 300 | |
| 301 | /** |
| 302 | * Creates a constant state which holds changing configurations information associated with the |
| 303 | * given Animator. |
| 304 | * <p> |
| 305 | * When new instance is called, default implementation clones the Animator. |
| 306 | */ |
| 307 | private static class StateListAnimatorConstantState |
| 308 | extends ConstantState<StateListAnimator> { |
| 309 | |
| 310 | final StateListAnimator mAnimator; |
| 311 | |
| 312 | int mChangingConf; |
| 313 | |
| 314 | public StateListAnimatorConstantState(StateListAnimator animator) { |
| 315 | mAnimator = animator; |
| 316 | mAnimator.mConstantState = this; |
| 317 | mChangingConf = mAnimator.getChangingConfigurations(); |
| 318 | } |
| 319 | |
| 320 | @Override |
| 321 | public int getChangingConfigurations() { |
| 322 | return mChangingConf; |
| 323 | } |
| 324 | |
| 325 | @Override |
| 326 | public StateListAnimator newInstance() { |
| 327 | final StateListAnimator clone = mAnimator.clone(); |
| 328 | clone.mConstantState = this; |
| 329 | return clone; |
| 330 | } |
| 331 | } |
Yigit Boyar | f4c5bf3 | 2014-05-06 16:56:08 -0700 | [diff] [blame] | 332 | } |