version:

fix:
update:更换为酷信

src/com/uiuipad/os/InterruptibleInOutAnimator.java

@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.uiuipad.os;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ObjectAnimator;
+import android.animation.ValueAnimator;
+import android.util.Property;
+
+import com.uiuipad.os.util.Thunk;
+
+/**
+ * A convenience class for two-way animations, e.g. a fadeIn/fadeOut animation.
+ * With a regular ValueAnimator, if you call reverse to show the 'out' animation, you'll get
+ * a frame-by-frame mirror of the 'in' animation -- i.e., the interpolated values will
+ * be exactly reversed. Using this class, both the 'in' and the 'out' animation use the
+ * interpolator in the same direction.
+ */
+public class InterruptibleInOutAnimator {
+
+    private static final Property<InterruptibleInOutAnimator, Float> VALUE =
+            new Property<InterruptibleInOutAnimator, Float>(Float.TYPE, "value") {
+                @Override
+                public Float get(InterruptibleInOutAnimator anim) {
+                    return anim.mValue;
+                }
+
+                @Override
+                public void set(InterruptibleInOutAnimator anim, Float value) {
+                    anim.mValue = value;
+                }
+            };
+
+    private long mOriginalDuration;
+    private float mOriginalFromValue;
+    private float mOriginalToValue;
+    private ValueAnimator mAnimator;
+
+    private float mValue;
+
+    private boolean mFirstRun = true;
+
+    private Object mTag = null;
+
+    private static final int STOPPED = 0;
+    private static final int IN = 1;
+    private static final int OUT = 2;
+
+    // TODO: This isn't really necessary, but is here to help diagnose a bug in the drag viz
+    @Thunk
+    int mDirection = STOPPED;
+
+    public InterruptibleInOutAnimator(long duration, float fromValue, float toValue) {
+        mAnimator = ObjectAnimator.ofFloat(this, VALUE, fromValue, toValue).setDuration(duration);
+        mOriginalDuration = duration;
+        mOriginalFromValue = fromValue;
+        mOriginalToValue = toValue;
+
+        mAnimator.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                mDirection = STOPPED;
+            }
+        });
+    }
+
+    private void animate(int direction) {
+        final long currentPlayTime = mAnimator.getCurrentPlayTime();
+        final float toValue = (direction == IN) ? mOriginalToValue : mOriginalFromValue;
+        final float startValue = mFirstRun ? mOriginalFromValue : mValue;
+
+        // Make sure it's stopped before we modify any values
+        cancel();
+
+        // TODO: We don't really need to do the animation if startValue == toValue, but
+        // somehow that doesn't seem to work, possibly a quirk of the animation framework
+        mDirection = direction;
+
+        // Ensure we don't calculate a non-sensical duration
+        long duration = mOriginalDuration - currentPlayTime;
+        mAnimator.setDuration(Math.max(0, Math.min(duration, mOriginalDuration)));
+
+        mAnimator.setFloatValues(startValue, toValue);
+        mAnimator.start();
+        mFirstRun = false;
+    }
+
+    public void cancel() {
+        mAnimator.cancel();
+        mDirection = STOPPED;
+    }
+
+    public void end() {
+        mAnimator.end();
+        mDirection = STOPPED;
+    }
+
+    /**
+     * Return true when the animation is not running and it hasn't even been started.
+     */
+    public boolean isStopped() {
+        return mDirection == STOPPED;
+    }
+
+    /**
+     * This is the equivalent of calling Animator.start(), except that it can be called when
+     * the animation is running in the opposite direction, in which case we reverse
+     * direction and animate for a correspondingly shorter duration.
+     */
+    public void animateIn() {
+        animate(IN);
+    }
+
+    /**
+     * This is the roughly the equivalent of calling Animator.reverse(), except that it uses the
+     * same interpolation curve as animateIn(), rather than mirroring it. Also, like animateIn(),
+     * if the animation is currently running in the opposite direction, we reverse
+     * direction and animate for a correspondingly shorter duration.
+     */
+    public void animateOut() {
+        animate(OUT);
+    }
+
+    public void setTag(Object tag) {
+        mTag = tag;
+    }
+
+    public Object getTag() {
+        return mTag;
+    }
+
+    public ValueAnimator getAnimator() {
+        return mAnimator;
+    }
+}