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
(cherry picked from commit 9e0702f4af33db569c9ed79bdf311204abe40dd5)

diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 84e2d49..c018341 100644 (file)
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -37,6 +37,7 @@ import android.graphics.drawable.Drawable;
 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;
@@ -47,6 +48,7 @@ import android.view.ViewDebug;
 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;
@@ -2133,8 +2135,18 @@ public class CellLayout extends ViewGroup implements BubbleTextShadowHandler {
             }
             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() {