commit 47639b9c1db9a5d0d89ce6b4b36d6b3c0d489602
author Michael Jurka <mikejurka@google.com> Mon Jan 14 12:42:27 2013 +0100
committer Michael Jurka <mikejurka@google.com> Thu Jan 17 10:38:15 2013 +0100
tree 3483dff311f5e429b38109f32512e7a843fb152f
parent ffc9f488a31b99248c27977c53d3b5f731f590e7

Use less HW layers in All Apps

(saves memory)

Change-Id: Ib2beda7549662a787437c7aa043e7858357c051f

src/com/android/launcher2/AppsCustomizePagedView.java

diff --git a/src/com/android/launcher2/AppsCustomizePagedView.java b/src/com/android/launcher2/AppsCustomizePagedView.java
index 4bfeb60..e36eee2 100644
--- a/src/com/android/launcher2/AppsCustomizePagedView.java
+++ b/src/com/android/launcher2/AppsCustomizePagedView.java
@@ -1099,7 +1099,7 @@
             images.add(info.iconBitmap);
         }
 
-        layout.createHardwareLayers();
+        enableHwLayersOnVisiblePages();
     }
 
     /**
@@ -1552,8 +1552,7 @@
                 }
             }
 
-            layout.createHardwareLayer();
-            invalidate();
+            enableHwLayersOnVisiblePages();
 
             // Update all thread priorities
             Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator();
@@ -1676,6 +1675,50 @@
                 }
             }
         }
+
+        enableHwLayersOnVisiblePages();
+    }
+
+    private void enableHwLayersOnVisiblePages() {
+        final int screenCount = getChildCount();
+
+        getVisiblePages(mTempVisiblePagesRange);
+        int leftScreen = mTempVisiblePagesRange[0];
+        int rightScreen = mTempVisiblePagesRange[1];
+        int forceDrawScreen = -1;
+        if (leftScreen == rightScreen) {
+            // make sure we're caching at least two pages always
+            if (rightScreen < screenCount - 1) {
+                rightScreen++;
+                forceDrawScreen = rightScreen;
+            } else if (leftScreen > 0) {
+                leftScreen--;
+                forceDrawScreen = leftScreen;
+            }
+        } else {
+            forceDrawScreen = leftScreen + 1;
+        }
+
+        for (int i = 0; i < screenCount; i++) {
+            final View layout = (View) getPageAt(i);
+            if (!(leftScreen <= i && i <= rightScreen &&
+                    (i == forceDrawScreen || shouldDrawChild(layout)))) {
+                layout.setLayerType(LAYER_TYPE_NONE, null);
+            }
+        }
+
+        int newLeft = -1;
+        int newRight = -1;
+        for (int i = 0; i < screenCount; i++) {
+            final View layout = (View) getPageAt(i);
+
+            if (leftScreen <= i && i <= rightScreen &&
+                    (i == forceDrawScreen || shouldDrawChild(layout))) {
+                if (layout.getLayerType() != LAYER_TYPE_HARDWARE) {
+                    layout.setLayerType(LAYER_TYPE_HARDWARE, null);
+                }
+            }
+        }
     }
 
     protected void overScroll(float amount) {