am 11af1878: Merge "Add animation and positional stability to intent chooser UI" into mnc-dr-dev

* commit '11af18783d32f8646428500a0ff3a2a57a77bf95':
  Add animation and positional stability to intent chooser UI

3 files changed, 335 insertions, 57 deletions

diff --git a/core/java/com/android/internal/app/ChooserActivity.java b/core/java/com/android/internal/app/ChooserActivity.java
index 2e0bf06..6bbebb7 100644
--- a/core/java/com/android/internal/app/ChooserActivity.java
+++ b/core/java/com/android/internal/app/ChooserActivity.java
@@ -16,6 +16,8 @@
 
 package com.android.internal.app;
 
+import android.animation.ObjectAnimator;
+import android.annotation.NonNull;
 import android.app.Activity;
 import android.content.ComponentName;
 import android.content.Context;
@@ -29,6 +31,7 @@ import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.ResolveInfo;
 import android.database.DataSetObserver;
+import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.Icon;
 import android.os.Bundle;
@@ -46,13 +49,18 @@ import android.service.chooser.ChooserTargetService;
 import android.service.chooser.IChooserTargetResult;
 import android.service.chooser.IChooserTargetService;
 import android.text.TextUtils;
+import android.util.FloatProperty;
 import android.util.Log;
 import android.util.Slog;
 import android.view.LayoutInflater;
 import android.view.View;
+import android.view.View.MeasureSpec;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
 import android.view.ViewGroup;
+import android.view.ViewGroup.LayoutParams;
+import android.view.animation.AnimationUtils;
+import android.view.animation.Interpolator;
 import android.widget.AbsListView;
 import android.widget.BaseAdapter;
 import android.widget.ListView;
@@ -80,6 +88,7 @@ public class ChooserActivity extends ResolverActivity {
     private Intent mReferrerFillInIntent;
 
     private ChooserListAdapter mChooserListAdapter;
+    private ChooserRowAdapter mChooserRowAdapter;
 
     private final List<ChooserTargetServiceConnection> mServiceConnections = new ArrayList<>();
 
@@ -253,7 +262,9 @@ public class ChooserActivity extends ResolverActivity {
             boolean alwaysUseOption) {
         final ListView listView = adapterView instanceof ListView ? (ListView) adapterView : null;
         mChooserListAdapter = (ChooserListAdapter) adapter;
-        adapterView.setAdapter(new ChooserRowAdapter(mChooserListAdapter));
+        mChooserRowAdapter = new ChooserRowAdapter(mChooserListAdapter);
+        mChooserRowAdapter.registerDataSetObserver(new OffsetDataSetObserver(adapterView));
+        adapterView.setAdapter(mChooserRowAdapter);
         if (listView != null) {
             listView.setItemsCanFocus(true);
         }
@@ -913,19 +924,103 @@ public class ChooserActivity extends ResolverActivity {
         }
     }
 
+    static class RowScale {
+        private static final int DURATION = 400;
+
+        float mScale;
+        ChooserRowAdapter mAdapter;
+        private final ObjectAnimator mAnimator;
+
+        public static final FloatProperty<RowScale> PROPERTY =
+                new FloatProperty<RowScale>("scale") {
+            @Override
+            public void setValue(RowScale object, float value) {
+                object.mScale = value;
+                object.mAdapter.notifyDataSetChanged();
+            }
+
+            @Override
+            public Float get(RowScale object) {
+                return object.mScale;
+            }
+        };
+
+        public RowScale(@NonNull ChooserRowAdapter adapter, float from, float to) {
+            mAdapter = adapter;
+            mScale = from;
+            if (from == to) {
+                mAnimator = null;
+                return;
+            }
+
+            mAnimator = ObjectAnimator.ofFloat(this, PROPERTY, from, to).setDuration(DURATION);
+        }
+
+        public RowScale setInterpolator(Interpolator interpolator) {
+            if (mAnimator != null) {
+                mAnimator.setInterpolator(interpolator);
+            }
+            return this;
+        }
+
+        public float get() {
+            return mScale;
+        }
+
+        public void startAnimation() {
+            if (mAnimator != null) {
+                mAnimator.start();
+            }
+        }
+
+        public void cancelAnimation() {
+            if (mAnimator != null) {
+                mAnimator.cancel();
+            }
+        }
+    }
+
     class ChooserRowAdapter extends BaseAdapter {
         private ChooserListAdapter mChooserListAdapter;
         private final LayoutInflater mLayoutInflater;
         private final int mColumnCount = 4;
+        private RowScale[] mServiceTargetScale;
+        private final Interpolator mInterpolator;
 
         public ChooserRowAdapter(ChooserListAdapter wrappedAdapter) {
             mChooserListAdapter = wrappedAdapter;
             mLayoutInflater = LayoutInflater.from(ChooserActivity.this);
 
+            mInterpolator = AnimationUtils.loadInterpolator(ChooserActivity.this,
+                    android.R.interpolator.decelerate_quint);
+
             wrappedAdapter.registerDataSetObserver(new DataSetObserver() {
                 @Override
                 public void onChanged() {
                     super.onChanged();
+                    final int rcount = getServiceTargetRowCount();
+                    if (mServiceTargetScale == null
+                            || mServiceTargetScale.length != rcount) {
+                        RowScale[] old = mServiceTargetScale;
+                        int oldRCount = old != null ? old.length : 0;
+                        mServiceTargetScale = new RowScale[rcount];
+                        if (old != null && rcount > 0) {
+                            System.arraycopy(old, 0, mServiceTargetScale, 0,
+                                    Math.min(old.length, rcount));
+                        }
+
+                        for (int i = rcount; i < oldRCount; i++) {
+                            old[i].cancelAnimation();
+                        }
+
+                        for (int i = oldRCount; i < rcount; i++) {
+                            final RowScale rs = new RowScale(ChooserRowAdapter.this, 0.f, 1.f)
+                                    .setInterpolator(mInterpolator);
+                            mServiceTargetScale[i] = rs;
+                            rs.startAnimation();
+                        }
+                    }
+
                     notifyDataSetChanged();
                 }
 
@@ -933,19 +1028,43 @@ public class ChooserActivity extends ResolverActivity {
                 public void onInvalidated() {
                     super.onInvalidated();
                     notifyDataSetInvalidated();
+                    if (mServiceTargetScale != null) {
+                        for (RowScale rs : mServiceTargetScale) {
+                            rs.cancelAnimation();
+                        }
+                    }
                 }
             });
         }
 
+        private float getRowScale(int rowPosition) {
+            final int start = getCallerTargetRowCount();
+            final int end = start + getServiceTargetRowCount();
+            if (rowPosition >= start && rowPosition < end) {
+                return mServiceTargetScale[rowPosition - start].get();
+            }
+            return 1.f;
+        }
+
         @Override
         public int getCount() {
             return (int) (
-                    Math.ceil((float) mChooserListAdapter.getCallerTargetCount() / mColumnCount)
-                    + Math.ceil((float) mChooserListAdapter.getServiceTargetCount() / mColumnCount)
+                    getCallerTargetRowCount()
+                    + getServiceTargetRowCount()
                     + Math.ceil((float) mChooserListAdapter.getStandardTargetCount() / mColumnCount)
             );
         }
 
+        public int getCallerTargetRowCount() {
+            return (int) Math.ceil(
+                    (float) mChooserListAdapter.getCallerTargetCount() / mColumnCount);
+        }
+
+        public int getServiceTargetRowCount() {
+            return (int) Math.ceil(
+                    (float) mChooserListAdapter.getServiceTargetCount() / mColumnCount);
+        }
+
         @Override
         public Object getItem(int position) {
             // We have nothing useful to return here.
@@ -959,33 +1078,67 @@ public class ChooserActivity extends ResolverActivity {
 
         @Override
         public View getView(int position, View convertView, ViewGroup parent) {
-            final View[] holder;
+            final RowViewHolder holder;
             if (convertView == null) {
                 holder = createViewHolder(parent);
             } else {
-                holder = (View[]) convertView.getTag();
+                holder = (RowViewHolder) convertView.getTag();
             }
             bindViewHolder(position, holder);
 
-            // We keep the actual list item view as the last item in the holder array
-            return holder[mColumnCount];
+            return holder.row;
         }
 
-        View[] createViewHolder(ViewGroup parent) {
-            final View[] holder = new View[mColumnCount + 1];
-
+        RowViewHolder createViewHolder(ViewGroup parent) {
             final ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.chooser_row,
                     parent, false);
+            final RowViewHolder holder = new RowViewHolder(row, mColumnCount);
+            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
+
             for (int i = 0; i < mColumnCount; i++) {
-                holder[i] = mChooserListAdapter.createView(row);
-                row.addView(holder[i]);
+                final View v = mChooserListAdapter.createView(row);
+                v.setOnClickListener(new OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        startSelected(holder.itemIndex, false, true);
+                    }
+                });
+                v.setOnLongClickListener(new OnLongClickListener() {
+                    @Override
+                    public boolean onLongClick(View v) {
+                        showAppDetails(
+                                mChooserListAdapter.resolveInfoForPosition(holder.itemIndex, true));
+                        return true;
+                    }
+                });
+                row.addView(v);
+                holder.cells[i] = v;
+
+                // Force height to be a given so we don't have visual disruption during scaling.
+                LayoutParams lp = v.getLayoutParams();
+                v.measure(spec, spec);
+                if (lp == null) {
+                    lp = new LayoutParams(LayoutParams.MATCH_PARENT, v.getMeasuredHeight());
+                    row.setLayoutParams(lp);
+                } else {
+                    lp.height = v.getMeasuredHeight();
+                }
+            }
+
+            // Pre-measure so we can scale later.
+            holder.measure();
+            LayoutParams lp = row.getLayoutParams();
+            if (lp == null) {
+                lp = new LayoutParams(LayoutParams.MATCH_PARENT, holder.measuredRowHeight);
+                row.setLayoutParams(lp);
+            } else {
+                lp.height = holder.measuredRowHeight;
             }
             row.setTag(holder);
-            holder[mColumnCount] = row;
             return holder;
         }
 
-        void bindViewHolder(int rowPosition, View[] holder) {
+        void bindViewHolder(int rowPosition, RowViewHolder holder) {
             final int start = getFirstRowPosition(rowPosition);
             final int startType = mChooserListAdapter.getPositionTargetType(start);
 
@@ -994,34 +1147,26 @@ public class ChooserActivity extends ResolverActivity {
                 end--;
             }
 
-            final ViewGroup row = (ViewGroup) holder[mColumnCount];
-
             if (startType == ChooserListAdapter.TARGET_SERVICE) {
-                row.setBackgroundColor(getColor(R.color.chooser_service_row_background_color));
+                holder.row.setBackgroundColor(
+                        getColor(R.color.chooser_service_row_background_color));
             } else {
-                row.setBackground(null);
+                holder.row.setBackgroundColor(Color.TRANSPARENT);
+            }
+
+            final int oldHeight = holder.row.getLayoutParams().height;
+            holder.row.getLayoutParams().height = Math.max(1,
+                    (int) (holder.measuredRowHeight * getRowScale(rowPosition)));
+            if (holder.row.getLayoutParams().height != oldHeight) {
+                holder.row.requestLayout();
             }
 
             for (int i = 0; i < mColumnCount; i++) {
-                final View v = holder[i];
+                final View v = holder.cells[i];
                 if (start + i <= end) {
                     v.setVisibility(View.VISIBLE);
-                    final int itemIndex = start + i;
-                    mChooserListAdapter.bindView(itemIndex, v);
-                    v.setOnClickListener(new OnClickListener() {
-                        @Override
-                        public void onClick(View v) {
-                            startSelected(itemIndex, false, true);
-                        }
-                    });
-                    v.setOnLongClickListener(new OnLongClickListener() {
-                        @Override
-                        public boolean onLongClick(View v) {
-                            showAppDetails(
-                                    mChooserListAdapter.resolveInfoForPosition(itemIndex, true));
-                            return true;
-                        }
-                    });
+                    holder.itemIndex = start + i;
+                    mChooserListAdapter.bindView(holder.itemIndex, v);
                 } else {
                     v.setVisibility(View.GONE);
                 }
@@ -1048,6 +1193,24 @@ public class ChooserActivity extends ResolverActivity {
         }
     }
 
+    static class RowViewHolder {
+        final View[] cells;
+        final ViewGroup row;
+        int measuredRowHeight;
+        int itemIndex;
+
+        public RowViewHolder(ViewGroup row, int cellCount) {
+            this.row = row;
+            this.cells = new View[cellCount];
+        }
+
+        public void measure() {
+            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
+            row.measure(spec, spec);
+            measuredRowHeight = row.getMeasuredHeight();
+        }
+    }
+
     static class ChooserTargetServiceConnection implements ServiceConnection {
         private final DisplayResolveInfo mOriginalTarget;
         private ComponentName mConnectedComponent;
@@ -1199,4 +1362,44 @@ public class ChooserActivity extends ResolverActivity {
             mSelectedTarget = null;
         }
     }
+
+    class OffsetDataSetObserver extends DataSetObserver {
+        private final AbsListView mListView;
+        private int mCachedViewType = -1;
+        private View mCachedView;
+
+        public OffsetDataSetObserver(AbsListView listView) {
+            mListView = listView;
+        }
+
+        @Override
+        public void onChanged() {
+            if (mResolverDrawerLayout == null) {
+                return;
+            }
+
+            final int chooserTargetRows = mChooserRowAdapter.getServiceTargetRowCount();
+            int offset = 0;
+            for (int i = 0; i < chooserTargetRows; i++)  {
+                final int pos = mChooserRowAdapter.getCallerTargetRowCount() + i;
+                final int vt = mChooserRowAdapter.getItemViewType(pos);
+                if (vt != mCachedViewType) {
+                    mCachedView = null;
+                }
+                final View v = mChooserRowAdapter.getView(pos, mCachedView, mListView);
+                int height = ((RowViewHolder) (v.getTag())).measuredRowHeight;
+
+                offset += (int) (height * mChooserRowAdapter.getRowScale(pos) * chooserTargetRows);
+
+                if (vt >= 0) {
+                    mCachedViewType = vt;
+                    mCachedView = v;
+                } else {
+                    mCachedViewType = -1;
+                }
+            }
+
+            mResolverDrawerLayout.setCollapsibleHeightReserved(offset);
+        }
+    }
 }
diff --git a/core/java/com/android/internal/app/ResolverActivity.java b/core/java/com/android/internal/app/ResolverActivity.java
index 1710489..ba0912a 100644
--- a/core/java/com/android/internal/app/ResolverActivity.java
+++ b/core/java/com/android/internal/app/ResolverActivity.java
@@ -103,6 +103,8 @@ public class ResolverActivity extends Activity {
     private ResolverComparator mResolverComparator;
     private PickTargetOptionRequest mPickOptionRequest;
 
+    protected ResolverDrawerLayout mResolverDrawerLayout;
+
     private boolean mRegistered;
     private final PackageMonitor mPackageMonitor = new PackageMonitor() {
         @Override public void onSomePackagesChanged() {
@@ -253,6 +255,7 @@ public class ResolverActivity extends Activity {
             if (isVoiceInteraction()) {
                 rdl.setCollapsed(false);
             }
+            mResolverDrawerLayout = rdl;
         }
 
         if (title == null) {
@@ -1570,7 +1573,10 @@ public class ResolverActivity extends Activity {
 
         private void onBindView(View view, TargetInfo info) {
             final ViewHolder holder = (ViewHolder) view.getTag();
-            holder.text.setText(info.getDisplayLabel());
+            final CharSequence label = info.getDisplayLabel();
+            if (!TextUtils.equals(holder.text.getText(), label)) {
+                holder.text.setText(info.getDisplayLabel());
+            }
             if (showsExtendedInfo(info)) {
                 holder.text2.setVisibility(View.VISIBLE);
                 holder.text2.setText(info.getExtendedInfo());
diff --git a/core/java/com/android/internal/widget/ResolverDrawerLayout.java b/core/java/com/android/internal/widget/ResolverDrawerLayout.java
index 7679624..c4347f8 100644
--- a/core/java/com/android/internal/widget/ResolverDrawerLayout.java
+++ b/core/java/com/android/internal/widget/ResolverDrawerLayout.java
@@ -69,6 +69,12 @@ public class ResolverDrawerLayout extends ViewGroup {
     private int mCollapsibleHeight;
     private int mUncollapsibleHeight;
 
+    /**
+     * The height in pixels of reserved space added to the top of the collapsed UI;
+     * e.g. chooser targets
+     */
+    private int mCollapsibleHeightReserved;
+
     private int mTopOffset;
 
     private boolean mIsDragging;
@@ -153,12 +159,62 @@ public class ResolverDrawerLayout extends ViewGroup {
         }
     }
 
+    public void setCollapsibleHeightReserved(int heightPixels) {
+        final int oldReserved = mCollapsibleHeightReserved;
+        mCollapsibleHeightReserved = heightPixels;
+
+        final int dReserved = mCollapsibleHeightReserved - oldReserved;
+        if (dReserved != 0 && mIsDragging) {
+            mLastTouchY -= dReserved;
+        }
+
+        final int oldCollapsibleHeight = mCollapsibleHeight;
+        mCollapsibleHeight = Math.max(mCollapsibleHeight, getMaxCollapsedHeight());
+
+        if (updateCollapseOffset(oldCollapsibleHeight, !isDragging())) {
+            return;
+        }
+
+        invalidate();
+    }
+
     private boolean isMoving() {
         return mIsDragging || !mScroller.isFinished();
     }
 
+    private boolean isDragging() {
+        return mIsDragging || getNestedScrollAxes() == SCROLL_AXIS_VERTICAL;
+    }
+
+    private boolean updateCollapseOffset(int oldCollapsibleHeight, boolean remainClosed) {
+        if (oldCollapsibleHeight == mCollapsibleHeight) {
+            return false;
+        }
+
+        if (isLaidOut()) {
+            final boolean isCollapsedOld = mCollapseOffset != 0;
+            if (remainClosed && (oldCollapsibleHeight < mCollapsibleHeight
+                    && mCollapseOffset == oldCollapsibleHeight)) {
+                // Stay closed even at the new height.
+                mCollapseOffset = mCollapsibleHeight;
+            } else {
+                mCollapseOffset = Math.min(mCollapseOffset, mCollapsibleHeight);
+            }
+            final boolean isCollapsedNew = mCollapseOffset != 0;
+            if (isCollapsedOld != isCollapsedNew) {
+                notifyViewAccessibilityStateChangedIfNeeded(
+                        AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
+            }
+        } else {
+            // Start out collapsed at first unless we restored state for otherwise
+            mCollapseOffset = mOpenOnLayout ? 0 : mCollapsibleHeight;
+        }
+        return true;
+    }
+
     private int getMaxCollapsedHeight() {
-        return isSmallCollapsed() ? mMaxCollapsedHeightSmall : mMaxCollapsedHeight;
+        return (isSmallCollapsed() ? mMaxCollapsedHeightSmall : mMaxCollapsedHeight)
+                + mCollapsibleHeightReserved;
     }
 
     public void setOnDismissedListener(OnDismissedListener listener) {
@@ -676,7 +732,7 @@ public class ResolverDrawerLayout extends ViewGroup {
             final LayoutParams lp = (LayoutParams) child.getLayoutParams();
             if (lp.alwaysShow && child.getVisibility() != GONE) {
                 measureChildWithMargins(child, widthSpec, widthPadding, heightSpec, heightUsed);
-                heightUsed += lp.topMargin + child.getMeasuredHeight() + lp.bottomMargin;
+                heightUsed += getHeightUsed(child);
             }
         }
 
@@ -688,7 +744,7 @@ public class ResolverDrawerLayout extends ViewGroup {
             final LayoutParams lp = (LayoutParams) child.getLayoutParams();
             if (!lp.alwaysShow && child.getVisibility() != GONE) {
                 measureChildWithMargins(child, widthSpec, widthPadding, heightSpec, heightUsed);
-                heightUsed += lp.topMargin + child.getMeasuredHeight() + lp.bottomMargin;
+                heightUsed += getHeightUsed(child);
             }
         }
 
@@ -697,30 +753,43 @@ public class ResolverDrawerLayout extends ViewGroup {
                 heightUsed - alwaysShowHeight - getMaxCollapsedHeight());
         mUncollapsibleHeight = heightUsed - mCollapsibleHeight;
 
-        if (isLaidOut()) {
-            final boolean isCollapsedOld = mCollapseOffset != 0;
-            if (oldCollapsibleHeight < mCollapsibleHeight
-                    && mCollapseOffset == oldCollapsibleHeight) {
-                // Stay closed even at the new height.
-                mCollapseOffset = mCollapsibleHeight;
-            } else {
-                mCollapseOffset = Math.min(mCollapseOffset, mCollapsibleHeight);
-            }
-            final boolean isCollapsedNew = mCollapseOffset != 0;
-            if (isCollapsedOld != isCollapsedNew) {
-                notifyViewAccessibilityStateChangedIfNeeded(
-                        AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
-            }
-        } else {
-            // Start out collapsed at first unless we restored state for otherwise
-            mCollapseOffset = mOpenOnLayout ? 0 : mCollapsibleHeight;
-        }
+        updateCollapseOffset(oldCollapsibleHeight, !isDragging());
 
         mTopOffset = Math.max(0, heightSize - heightUsed) + (int) mCollapseOffset;
 
         setMeasuredDimension(sourceWidth, heightSize);
     }
 
+    private int getHeightUsed(View child) {
+        // This method exists because we're taking a fast path at measuring ListViews that
+        // lets us get away with not doing the more expensive wrap_content measurement which
+        // imposes double child view measurement costs. If we're looking at a ListView, we can
+        // check against the lowest child view plus padding and margin instead of the actual
+        // measured height of the ListView. This lets the ListView hang off the edge when
+        // all of the content would fit on-screen.
+
+        int heightUsed = child.getMeasuredHeight();
+        if (child instanceof AbsListView) {
+            final AbsListView lv = (AbsListView) child;
+            final int lvPaddingBottom = lv.getPaddingBottom();
+
+            int lowest = 0;
+            for (int i = 0, N = lv.getChildCount(); i < N; i++) {
+                final int bottom = lv.getChildAt(i).getBottom() + lvPaddingBottom;
+                if (bottom > lowest) {
+                    lowest = bottom;
+                }
+            }
+
+            if (lowest < heightUsed) {
+                heightUsed = lowest;
+            }
+        }
+
+        final LayoutParams lp = (LayoutParams) child.getLayoutParams();
+        return lp.topMargin + heightUsed + lp.bottomMargin;
+    }
+
     @Override
     protected void onLayout(boolean changed, int l, int t, int r, int b) {
         final int width = getWidth();