Use cached thumbnails in Recent tasks.

The thumbnail returned from ActivityManager.getTaskThumbnail() now
contains either a Bitmap or a ParcelFileDescriptor that points to
a file containing a compressed Bitmap. The Recent tasks list is
now responsible for all thumbnail Bitmap caching as the activity
manager keeps only the most recent 5. This also permits low memory
devices to have many more tasks in the Recent tasks list.

As part of this CL the concept of subtasks is removed eliminating
code supporting the TaskAccessInfo and IThumbnailRetriever classes.

Fixes bug 15828934.

Change-Id: I0fd0320a1a04e3c78d79357899b83a2fff97abf2

1 files changed, 4 insertions, 14 deletions

diff --git a/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java b/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java
index d7a6c1d..0e063d6 100644
--- a/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java
+++ b/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java
@@ -72,7 +72,7 @@ public class ActivityTestMain extends Activity {
 
     private void addThumbnail(LinearLayout container, Bitmap bm,
             final ActivityManager.RecentTaskInfo task,
-            final ActivityManager.TaskThumbnails thumbs, final int subIndex) {
+            final ActivityManager.TaskThumbnail thumbs) {
         ImageView iv = new ImageView(this);
         if (bm != null) {
             iv.setImageBitmap(bm);
@@ -86,9 +86,6 @@ public class ActivityTestMain extends Activity {
             @Override
             public void onClick(View v) {
                 if (task.id >= 0 && thumbs != null) {
-                    if (subIndex < (thumbs.numSubThumbbails-1)) {
-                        mAm.removeSubTask(task.id, subIndex+1);
-                    }
                     mAm.moveTaskToFront(task.id, ActivityManager.MOVE_TASK_WITH_HOME);
                 } else {
                     try {
@@ -104,11 +101,7 @@ public class ActivityTestMain extends Activity {
             @Override
             public boolean onLongClick(View v) {
                 if (task.id >= 0 && thumbs != null) {
-                    if (subIndex < 0) {
-                        mAm.removeTask(task.id, ActivityManager.REMOVE_TASK_KILL_PROCESS);
-                    } else {
-                        mAm.removeSubTask(task.id, subIndex);
-                    }
+                    mAm.removeTask(task.id, ActivityManager.REMOVE_TASK_KILL_PROCESS);
                     buildUi();
                     return true;
                 }
@@ -333,7 +326,7 @@ public class ActivityTestMain extends Activity {
         if (recents != null) {
             for (int i=0; i<recents.size(); i++) {
                 ActivityManager.RecentTaskInfo r = recents.get(i);
-                ActivityManager.TaskThumbnails tt = mAm.getTaskThumbnails(r.persistentId);
+                ActivityManager.TaskThumbnail tt = mAm.getTaskThumbnail(r.persistentId);
                 TextView tv = new TextView(this);
                 tv.setText(r.baseIntent.getComponent().flattenToShortString());
                 top.addView(tv, new LinearLayout.LayoutParams(
@@ -341,10 +334,7 @@ public class ActivityTestMain extends Activity {
                         LinearLayout.LayoutParams.WRAP_CONTENT));
                 LinearLayout item = new LinearLayout(this);
                 item.setOrientation(LinearLayout.HORIZONTAL);
-                addThumbnail(item, tt != null ? tt.mainThumbnail : null, r, tt, -1);
-                for (int j=0; j<tt.numSubThumbbails; j++) {
-                    addThumbnail(item, tt.getSubThumbnail(j), r, tt, j);
-                }
+                addThumbnail(item, tt != null ? tt.mainThumbnail : null, r, tt);
                 top.addView(item, new LinearLayout.LayoutParams(
                         LinearLayout.LayoutParams.WRAP_CONTENT,
                         LinearLayout.LayoutParams.WRAP_CONTENT));