Rework thumbnails in activity manager.

We now only keep a thumbnail for the task, not for each
activity.  However if you use FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET,
we will make a new secondary thumbnail for that series of
activities.  There is a new API for the app to get these
secondary thumbnails.

Also set a default thumbnail size for non-xlarge screens
so we have thumbnails on phones.  (We need some smarter
code in the platform for computing the actual thumbnail
dimensions of the current device).  And add a test app
to show recent tasks + thumbnails.

Change-Id: Ic36759f6635522118a2cb7f156662229a610c492

1 files changed, 99 insertions, 0 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
new file mode 100644
index 000000000000..8c5c35a33071
--- /dev/null
+++ b/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2011 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.google.android.test.activity;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import android.app.Activity;
+import android.app.ActivityManager;
+import android.app.ActivityThread;
+import android.app.Application;
+import android.os.Bundle;
+import android.graphics.BitmapFactory;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.ScrollView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.res.CompatibilityInfo;
+import android.util.DisplayMetrics;
+import android.util.Log;
+
+public class ActivityTestMain extends Activity {
+    private void addThumbnail(LinearLayout container, Bitmap bm) {
+        ImageView iv = new ImageView(this);
+        if (bm != null) {
+            iv.setImageBitmap(bm);
+        }
+        iv.setBackgroundResource(android.R.drawable.gallery_thumb);
+        int w = getResources().getDimensionPixelSize(android.R.dimen.thumbnail_width);
+        int h = getResources().getDimensionPixelSize(android.R.dimen.thumbnail_height);
+        container.addView(iv, new LinearLayout.LayoutParams(w, h));
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        ActivityManager am = (ActivityManager)getSystemService(ACTIVITY_SERVICE);
+
+        LinearLayout top = new LinearLayout(this);
+        top.setOrientation(LinearLayout.VERTICAL);
+
+        List<ActivityManager.RecentTaskInfo> recents = am.getRecentTasks(10,
+                ActivityManager.RECENT_WITH_EXCLUDED);
+        if (recents != null) {
+            for (int i=0; i<recents.size(); i++) {
+                ActivityManager.RecentTaskInfo r = recents.get(i);
+                ActivityManager.TaskThumbnails tt = r != null
+                        ? am.getTaskThumbnails(r.persistentId) : null;
+                TextView tv = new TextView(this);
+                tv.setText(r.baseIntent.getComponent().flattenToShortString());
+                top.addView(tv, new LinearLayout.LayoutParams(
+                        LinearLayout.LayoutParams.WRAP_CONTENT,
+                        LinearLayout.LayoutParams.WRAP_CONTENT));
+                LinearLayout item = new LinearLayout(this);
+                item.setOrientation(LinearLayout.HORIZONTAL);
+                addThumbnail(item, tt != null ? tt.mainThumbnail : null);
+                for (int j=0; j<tt.numSubThumbbails; j++) {
+                    addThumbnail(item, tt.getSubThumbnail(j));
+                }
+                top.addView(item, new LinearLayout.LayoutParams(
+                        LinearLayout.LayoutParams.WRAP_CONTENT,
+                        LinearLayout.LayoutParams.WRAP_CONTENT));
+            }
+        }
+
+        setContentView(scrollWrap(top));
+    }
+
+    private View scrollWrap(View view) {
+        ScrollView scroller = new ScrollView(this);
+        scroller.addView(view, new ScrollView.LayoutParams(ScrollView.LayoutParams.MATCH_PARENT,
+                ScrollView.LayoutParams.MATCH_PARENT));
+        return scroller;
+    }
+}