commit 9e0702f4af33db569c9ed79bdf311204abe40dd5
author Tony Wickham <twickham@google.com> Wed Sep 02 14:45:39 2015 -0700
committer Tony Wickham <twickham@google.com> Wed Sep 02 15:06:00 2015 -0700
tree a7be8d01c2b5c881473caf4bfa9bf4b4d4c5cbd5
parent 785f7a59d347b199d544d9c9c38f6f3eb26b0085

Don't repeat ReorderPreviewAnimation for folders/widgets in power save mode.

Since power save mode (introduced in Lollipop, also known as battery saver)
disables animations, the ReorderPreviewAnimation looks bad - instead of
displaced folders subtly and smoothly moving up and down, they violently jump
between up and down positions in rapid succession. Setting the animation to not
repeat in this case avoids this issue.

Bug: 23675090
Change-Id: I8149610af75e7023dca28a942b3447228083cd33

src/com/android/launcher3/CellLayout.java

diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 907ded0..653ee7e 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -35,6 +35,7 @@
 import android.graphics.drawable.TransitionDrawable;
 import android.os.Build;
 import android.os.Parcelable;
+import android.os.PowerManager;
 import android.support.v4.view.ViewCompat;
 import android.util.AttributeSet;
 import android.util.Log;
@@ -45,6 +46,7 @@
 import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.DecelerateInterpolator;
+import android.widget.Toast;
 
 import com.android.launcher3.BubbleTextView.BubbleTextShadowHandler;
 import com.android.launcher3.FolderIcon.FolderRingAnimator;
@@ -2141,8 +2143,18 @@
             }
             ValueAnimator va = LauncherAnimUtils.ofFloat(child, 0f, 1f);
             a = va;
-            va.setRepeatMode(ValueAnimator.REVERSE);
-            va.setRepeatCount(ValueAnimator.INFINITE);
+
+            // Animations are disabled in power save mode, causing the repeated animation to jump
+            // spastically between beginning and end states. Since this looks bad, we don't repeat
+            // the animation in power save mode.
+            PowerManager powerManager = (PowerManager) getContext()
+                    .getSystemService(Context.POWER_SERVICE);
+            boolean powerSaverOn = Utilities.ATLEAST_LOLLIPOP && powerManager.isPowerSaveMode();
+            if (!powerSaverOn) {
+                va.setRepeatMode(ValueAnimator.REVERSE);
+                va.setRepeatCount(ValueAnimator.INFINITE);
+            }
+
             va.setDuration(mode == MODE_HINT ? HINT_DURATION : PREVIEW_DURATION);
             va.setStartDelay((int) (Math.random() * 60));
             va.addUpdateListener(new AnimatorUpdateListener() {