move ActionBarSherlock lib, add gradle build files

1 files changed, 733 insertions, 0 deletions

diff --git a/libraries/ActionBarSherlock/src/com/actionbarsherlock/widget/SuggestionsAdapter.java b/libraries/ActionBarSherlock/src/com/actionbarsherlock/widget/SuggestionsAdapter.java
new file mode 100644
index 000000000..bd5cbd718
--- /dev/null
+++ b/libraries/ActionBarSherlock/src/com/actionbarsherlock/widget/SuggestionsAdapter.java
@@ -0,0 +1,733 @@
+/*
+ * Copyright (C) 2009 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.actionbarsherlock.widget;
+
+import android.app.SearchManager;
+import android.app.SearchableInfo;
+import android.content.ComponentName;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.res.ColorStateList;
+import android.content.res.Resources;
+import android.database.Cursor;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.v4.widget.ResourceCursorAdapter;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.TextUtils;
+import android.text.style.TextAppearanceSpan;
+import android.util.Log;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+import com.actionbarsherlock.R;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import java.util.WeakHashMap;
+
+/**
+ * Provides the contents for the suggestion drop-down list.
+ *
+ * @hide
+ */
+class SuggestionsAdapter extends ResourceCursorAdapter implements OnClickListener {
+
+    private static final boolean DBG = false;
+    private static final String LOG_TAG = "SuggestionsAdapter";
+    private static final int QUERY_LIMIT = 50;
+
+    static final int REFINE_NONE = 0;
+    static final int REFINE_BY_ENTRY = 1;
+    static final int REFINE_ALL = 2;
+
+    private SearchManager mSearchManager;
+    private SearchView mSearchView;
+    private Context mProviderContext;
+    private WeakHashMap<String, Drawable.ConstantState> mOutsideDrawablesCache;
+    private boolean mClosed = false;
+    private int mQueryRefinement = REFINE_BY_ENTRY;
+
+    // URL color
+    private ColorStateList mUrlColor;
+
+    static final int INVALID_INDEX = -1;
+
+    // Cached column indexes, updated when the cursor changes.
+    private int mText1Col = INVALID_INDEX;
+    private int mText2Col = INVALID_INDEX;
+    private int mText2UrlCol = INVALID_INDEX;
+    private int mIconName1Col = INVALID_INDEX;
+    private int mIconName2Col = INVALID_INDEX;
+    private int mFlagsCol = INVALID_INDEX;
+
+    // private final Runnable mStartSpinnerRunnable;
+    // private final Runnable mStopSpinnerRunnable;
+
+    /**
+     * The amount of time we delay in the filter when the user presses the delete key.
+     */
+    //private static final long DELETE_KEY_POST_DELAY = 500L;
+
+    public SuggestionsAdapter(Context context, SearchView searchView,
+                SearchableInfo mSearchable, WeakHashMap<String, Drawable.ConstantState> outsideDrawablesCache) {
+        super(context,
+            R.layout.abs__search_dropdown_item_icons_2line,
+            null,   // no initial cursor
+            true);  // auto-requery
+        mSearchManager = (SearchManager) mContext.getSystemService(Context.SEARCH_SERVICE);
+        mProviderContext = mContext;
+        mSearchView = searchView;
+
+        mOutsideDrawablesCache = outsideDrawablesCache;
+
+        // mStartSpinnerRunnable = new Runnable() {
+        // public void run() {
+        // // mSearchView.setWorking(true); // TODO:
+        // }
+        // };
+        //
+        // mStopSpinnerRunnable = new Runnable() {
+        // public void run() {
+        // // mSearchView.setWorking(false); // TODO:
+        // }
+        // };
+
+        // delay 500ms when deleting
+//  TODO  getFilter().setDelayer(new Filter.Delayer() {
+//
+//      private int mPreviousLength = 0;
+//
+//      public long getPostingDelay(CharSequence constraint) {
+//        if (constraint == null) return 0;
+//
+//        long delay = constraint.length() < mPreviousLength ? DELETE_KEY_POST_DELAY : 0;
+//        mPreviousLength = constraint.length();
+//        return delay;
+//      }
+//    });
+    }
+
+    /**
+     * Enables query refinement for all suggestions. This means that an additional icon
+     * will be shown for each entry. When clicked, the suggested text on that line will be
+     * copied to the query text field.
+     * <p>
+     *
+     * @param refineWhat which queries to refine. Possible values are {@link #REFINE_NONE},
+     * {@link #REFINE_BY_ENTRY}, and {@link #REFINE_ALL}.
+     */
+    public void setQueryRefinement(int refineWhat) {
+        mQueryRefinement = refineWhat;
+    }
+
+    /**
+     * Returns the current query refinement preference.
+     * @return value of query refinement preference
+     */
+    public int getQueryRefinement() {
+        return mQueryRefinement;
+    }
+
+    /**
+     * Overridden to always return <code>false</code>, since we cannot be sure that
+     * suggestion sources return stable IDs.
+     */
+    @Override
+    public boolean hasStableIds() {
+        return false;
+    }
+
+    /**
+     * Use the search suggestions provider to obtain a live cursor.  This will be called
+     * in a worker thread, so it's OK if the query is slow (e.g. round trip for suggestions).
+     * The results will be processed in the UI thread and changeCursor() will be called.
+     */
+    @Override
+    public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
+        if (DBG) Log.d(LOG_TAG, "runQueryOnBackgroundThread(" + constraint + ")");
+        String query = (constraint == null) ? "" : constraint.toString();
+        /**
+         * for in app search we show the progress spinner until the cursor is returned with
+         * the results.
+         */
+        Cursor cursor = null;
+        if (mSearchView.getVisibility() != View.VISIBLE
+                || mSearchView.getWindowVisibility() != View.VISIBLE) {
+            return null;
+        }
+        //mSearchView.getWindow().getDecorView().post(mStartSpinnerRunnable); // TODO:
+        try {
+            cursor = getSuggestions(query, QUERY_LIMIT);
+            // trigger fill window so the spinner stays up until the results are copied over and
+            // closer to being ready
+            if (cursor != null) {
+                cursor.getCount();
+                return cursor;
+            }
+        } catch (RuntimeException e) {
+            Log.w(LOG_TAG, "Search suggestions query threw an exception.", e);
+        }
+        // If cursor is null or an exception was thrown, stop the spinner and return null.
+        // changeCursor doesn't get called if cursor is null
+        // mSearchView.getWindow().getDecorView().post(mStopSpinnerRunnable); // TODO:
+        return null;
+    }
+
+    public Cursor getSuggestions(String query, int limit) {
+        Uri.Builder uriBuilder = new Uri.Builder()
+                .scheme(ContentResolver.SCHEME_CONTENT)
+                .query("")  // TODO: Remove, workaround for a bug in Uri.writeToParcel()
+                .fragment("");  // TODO: Remove, workaround for a bug in Uri.writeToParcel()
+
+        // append standard suggestion query path
+        uriBuilder.appendPath(SearchManager.SUGGEST_URI_PATH_QUERY);
+
+        // inject query, either as selection args or inline
+        uriBuilder.appendPath(query);
+
+        if (limit > 0) {
+            uriBuilder.appendQueryParameter(SearchManager.SUGGEST_PARAMETER_LIMIT, String.valueOf(limit));
+        }
+
+        Uri uri = uriBuilder.build();
+
+        // finally, make the query
+        return mContext.getContentResolver().query(uri, null, null, null, null);
+    }
+
+    public void close() {
+        if (DBG) Log.d(LOG_TAG, "close()");
+        changeCursor(null);
+        mClosed = true;
+    }
+
+    @Override
+    public void notifyDataSetChanged() {
+        if (DBG) Log.d(LOG_TAG, "notifyDataSetChanged");
+        super.notifyDataSetChanged();
+
+        // mSearchView.onDataSetChanged(); // TODO:
+
+        updateSpinnerState(getCursor());
+    }
+
+    @Override
+    public void notifyDataSetInvalidated() {
+        if (DBG) Log.d(LOG_TAG, "notifyDataSetInvalidated");
+        super.notifyDataSetInvalidated();
+
+        updateSpinnerState(getCursor());
+    }
+
+    private void updateSpinnerState(Cursor cursor) {
+        Bundle extras = cursor != null ? cursor.getExtras() : null;
+        if (DBG) {
+            Log.d(LOG_TAG, "updateSpinnerState - extra = "
+                    + (extras != null
+                    ? extras.getBoolean(SearchManager.CURSOR_EXTRA_KEY_IN_PROGRESS)
+                    : null));
+        }
+        // Check if the Cursor indicates that the query is not complete and show the spinner
+        if (extras != null
+                && extras.getBoolean(SearchManager.CURSOR_EXTRA_KEY_IN_PROGRESS)) {
+            // mSearchView.getWindow().getDecorView().post(mStartSpinnerRunnable); // TODO:
+            return;
+        }
+        // If cursor is null or is done, stop the spinner
+        // mSearchView.getWindow().getDecorView().post(mStopSpinnerRunnable); // TODO:
+    }
+
+    /**
+     * Cache columns.
+     */
+    @Override
+    public void changeCursor(Cursor c) {
+        if (DBG) Log.d(LOG_TAG, "changeCursor(" + c + ")");
+
+        if (mClosed) {
+            Log.w(LOG_TAG, "Tried to change cursor after adapter was closed.");
+            if (c != null) c.close();
+            return;
+        }
+
+        try {
+            super.changeCursor(c);
+
+            if (c != null) {
+                mText1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1);
+                mText2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2);
+                mText2UrlCol = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2_URL);
+                mIconName1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_1);
+                mIconName2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_2);
+                mFlagsCol = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_FLAGS);
+            }
+        } catch (Exception e) {
+            Log.e(LOG_TAG, "error changing cursor and caching columns", e);
+        }
+    }
+
+    /**
+     * Tags the view with cached child view look-ups.
+     */
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        View v = super.newView(context, cursor, parent);
+        v.setTag(new ChildViewCache(v));
+        return v;
+    }
+
+    /**
+     * Cache of the child views of drop-drown list items, to avoid looking up the children
+     * each time the contents of a list item are changed.
+     */
+    private final static class ChildViewCache {
+        public final TextView mText1;
+        public final TextView mText2;
+        public final ImageView mIcon1;
+        public final ImageView mIcon2;
+        public final ImageView mIconRefine;
+
+        public ChildViewCache(View v) {
+            mText1 = (TextView) v.findViewById(android.R.id.text1);
+            mText2 = (TextView) v.findViewById(android.R.id.text2);
+            mIcon1 = (ImageView) v.findViewById(android.R.id.icon1);
+            mIcon2 = (ImageView) v.findViewById(android.R.id.icon2);
+            mIconRefine = (ImageView) v.findViewById(R.id.edit_query);
+        }
+    }
+
+    @Override
+    public void bindView(View view, Context context, Cursor cursor) {
+        ChildViewCache views = (ChildViewCache) view.getTag();
+
+        int flags = 0;
+        if (mFlagsCol != INVALID_INDEX) {
+            flags = cursor.getInt(mFlagsCol);
+        }
+        if (views.mText1 != null) {
+            String text1 = getStringOrNull(cursor, mText1Col);
+            setViewText(views.mText1, text1);
+        }
+        if (views.mText2 != null) {
+            // First check TEXT_2_URL
+            CharSequence text2 = getStringOrNull(cursor, mText2UrlCol);
+            if (text2 != null) {
+                text2 = formatUrl(text2);
+            } else {
+                text2 = getStringOrNull(cursor, mText2Col);
+            }
+
+            // If no second line of text is indicated, allow the first line of text
+            // to be up to two lines if it wants to be.
+            if (TextUtils.isEmpty(text2)) {
+                if (views.mText1 != null) {
+                    views.mText1.setSingleLine(false);
+                    views.mText1.setMaxLines(2);
+                }
+            } else {
+                if (views.mText1 != null) {
+                    views.mText1.setSingleLine(true);
+                    views.mText1.setMaxLines(1);
+                }
+            }
+            setViewText(views.mText2, text2);
+        }
+
+        if (views.mIcon1 != null) {
+            setViewDrawable(views.mIcon1, getIcon1(cursor), View.INVISIBLE);
+        }
+        if (views.mIcon2 != null) {
+            setViewDrawable(views.mIcon2, getIcon2(cursor), View.GONE);
+        }
+        if (mQueryRefinement == REFINE_ALL
+                || (mQueryRefinement == REFINE_BY_ENTRY
+                && (flags & SearchManager.FLAG_QUERY_REFINEMENT) != 0)) {
+            views.mIconRefine.setVisibility(View.VISIBLE);
+            views.mIconRefine.setTag(views.mText1.getText());
+            views.mIconRefine.setOnClickListener(this);
+        } else {
+            views.mIconRefine.setVisibility(View.GONE);
+        }
+    }
+
+    public void onClick(View v) {
+        Object tag = v.getTag();
+        if (tag instanceof CharSequence) {
+            mSearchView.onQueryRefine((CharSequence) tag);
+        }
+    }
+
+    private CharSequence formatUrl(CharSequence url) {
+        if (mUrlColor == null) {
+            // Lazily get the URL color from the current theme.
+            TypedValue colorValue = new TypedValue();
+            mContext.getTheme().resolveAttribute(R.attr.textColorSearchUrl, colorValue, true);
+            mUrlColor = mContext.getResources().getColorStateList(colorValue.resourceId);
+        }
+
+        SpannableString text = new SpannableString(url);
+        text.setSpan(new TextAppearanceSpan(null, 0, 0, mUrlColor, null),
+                0, url.length(),
+                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+        return text;
+    }
+
+    private void setViewText(TextView v, CharSequence text) {
+        // Set the text even if it's null, since we need to clear any previous text.
+        v.setText(text);
+
+        if (TextUtils.isEmpty(text)) {
+            v.setVisibility(View.GONE);
+        } else {
+            v.setVisibility(View.VISIBLE);
+        }
+    }
+
+    private Drawable getIcon1(Cursor cursor) {
+        if (mIconName1Col == INVALID_INDEX) {
+            return null;
+        }
+        String value = cursor.getString(mIconName1Col);
+        Drawable drawable = getDrawableFromResourceValue(value);
+        if (drawable != null) {
+            return drawable;
+        }
+        return getDefaultIcon1(cursor);
+    }
+
+    private Drawable getIcon2(Cursor cursor) {
+        if (mIconName2Col == INVALID_INDEX) {
+            return null;
+        }
+        String value = cursor.getString(mIconName2Col);
+        return getDrawableFromResourceValue(value);
+    }
+
+    /**
+     * Sets the drawable in an image view, makes sure the view is only visible if there
+     * is a drawable.
+     */
+    private void setViewDrawable(ImageView v, Drawable drawable, int nullVisibility) {
+        // Set the icon even if the drawable is null, since we need to clear any
+        // previous icon.
+        v.setImageDrawable(drawable);
+
+        if (drawable == null) {
+            v.setVisibility(nullVisibility);
+        } else {
+            v.setVisibility(View.VISIBLE);
+
+            // This is a hack to get any animated drawables (like a 'working' spinner)
+            // to animate. You have to setVisible true on an AnimationDrawable to get
+            // it to start animating, but it must first have been false or else the
+            // call to setVisible will be ineffective. We need to clear up the story
+            // about animated drawables in the future, see http://b/1878430.
+            drawable.setVisible(false, false);
+            drawable.setVisible(true, false);
+        }
+    }
+
+    /**
+     * Gets the text to show in the query field when a suggestion is selected.
+     *
+     * @param cursor The Cursor to read the suggestion data from. The Cursor should already
+     *        be moved to the suggestion that is to be read from.
+     * @return The text to show, or <code>null</code> if the query should not be
+     *         changed when selecting this suggestion.
+     */
+    @Override
+    public CharSequence convertToString(Cursor cursor) {
+        if (cursor == null) {
+            return null;
+        }
+
+        String query = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_QUERY);
+        if (query != null) {
+            return query;
+        }
+
+        return null;
+    }
+
+    /**
+     * This method is overridden purely to provide a bit of protection against
+     * flaky content providers.
+     *
+     * @see android.widget.ListAdapter#getView(int, View, ViewGroup)
+     */
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        try {
+            return super.getView(position, convertView, parent);
+        } catch (RuntimeException e) {
+            Log.w(LOG_TAG, "Search suggestions cursor threw exception.", e);
+            // Put exception string in item title
+            View v = newView(mContext, mCursor, parent);
+            if (v != null) {
+                ChildViewCache views = (ChildViewCache) v.getTag();
+                TextView tv = views.mText1;
+                tv.setText(e.toString());
+            }
+            return v;
+        }
+    }
+
+    /**
+     * Gets a drawable given a value provided by a suggestion provider.
+     *
+     * This value could be just the string value of a resource id
+     * (e.g., "2130837524"), in which case we will try to retrieve a drawable from
+     * the provider's resources. If the value is not an integer, it is
+     * treated as a Uri and opened with
+     * {@link ContentResolver#openOutputStream(android.net.Uri, String)}.
+     *
+     * All resources and URIs are read using the suggestion provider's context.
+     *
+     * If the string is not formatted as expected, or no drawable can be found for
+     * the provided value, this method returns null.
+     *
+     * @param drawableId a string like "2130837524",
+     *        "android.resource://com.android.alarmclock/2130837524",
+     *        or "content://contacts/photos/253".
+     * @return a Drawable, or null if none found
+     */
+    private Drawable getDrawableFromResourceValue(String drawableId) {
+        if (drawableId == null || drawableId.length() == 0 || "0".equals(drawableId)) {
+            return null;
+        }
+        try {
+            // First, see if it's just an integer
+            int resourceId = Integer.parseInt(drawableId);
+            // It's an int, look for it in the cache
+            String drawableUri = ContentResolver.SCHEME_ANDROID_RESOURCE
+                    + "://" + mProviderContext.getPackageName() + "/" + resourceId;
+            // Must use URI as cache key, since ints are app-specific
+            Drawable drawable = checkIconCache(drawableUri);
+            if (drawable != null) {
+                return drawable;
+            }
+            // Not cached, find it by resource ID
+            drawable = mProviderContext.getResources().getDrawable(resourceId);
+            // Stick it in the cache, using the URI as key
+            storeInIconCache(drawableUri, drawable);
+            return drawable;
+        } catch (NumberFormatException nfe) {
+            // It's not an integer, use it as a URI
+            Drawable drawable = checkIconCache(drawableId);
+            if (drawable != null) {
+                return drawable;
+            }
+            Uri uri = Uri.parse(drawableId);
+            drawable = getDrawable(uri);
+            storeInIconCache(drawableId, drawable);
+            return drawable;
+        } catch (Resources.NotFoundException nfe) {
+            // It was an integer, but it couldn't be found, bail out
+            Log.w(LOG_TAG, "Icon resource not found: " + drawableId);
+            return null;
+        }
+    }
+
+    /**
+     * Gets a drawable by URI, without using the cache.
+     *
+     * @return A drawable, or {@code null} if the drawable could not be loaded.
+     */
+    private Drawable getDrawable(Uri uri) {
+        try {
+            String scheme = uri.getScheme();
+            if (ContentResolver.SCHEME_ANDROID_RESOURCE.equals(scheme)) {
+                // Load drawables through Resources, to get the source density information
+                try {
+                    return getTheDrawable(uri);
+                } catch (Resources.NotFoundException ex) {
+                    throw new FileNotFoundException("Resource does not exist: " + uri);
+                }
+            } else {
+                // Let the ContentResolver handle content and file URIs.
+                InputStream stream = mProviderContext.getContentResolver().openInputStream(uri);
+                if (stream == null) {
+                    throw new FileNotFoundException("Failed to open " + uri);
+                }
+                try {
+                    return Drawable.createFromStream(stream, null);
+                } finally {
+                    try {
+                        stream.close();
+                    } catch (IOException ex) {
+                        Log.e(LOG_TAG, "Error closing icon stream for " + uri, ex);
+                    }
+                }
+            }
+        } catch (FileNotFoundException fnfe) {
+            Log.w(LOG_TAG, "Icon not found: " + uri + ", " + fnfe.getMessage());
+            return null;
+        }
+    }
+
+    public Drawable getTheDrawable(Uri uri) throws FileNotFoundException {
+        String authority = uri.getAuthority();
+        Resources r;
+        if (TextUtils.isEmpty(authority)) {
+            throw new FileNotFoundException("No authority: " + uri);
+        } else {
+            try {
+                r = mContext.getPackageManager().getResourcesForApplication(authority);
+            } catch (NameNotFoundException ex) {
+                throw new FileNotFoundException("No package found for authority: " + uri);
+            }
+        }
+        List<String> path = uri.getPathSegments();
+        if (path == null) {
+            throw new FileNotFoundException("No path: " + uri);
+        }
+        int len = path.size();
+        int id;
+        if (len == 1) {
+            try {
+                id = Integer.parseInt(path.get(0));
+            } catch (NumberFormatException e) {
+                throw new FileNotFoundException("Single path segment is not a resource ID: " + uri);
+            }
+        } else if (len == 2) {
+            id = r.getIdentifier(path.get(1), path.get(0), authority);
+        } else {
+            throw new FileNotFoundException("More than two path segments: " + uri);
+        }
+        if (id == 0) {
+            throw new FileNotFoundException("No resource found for: " + uri);
+        }
+        return r.getDrawable(id);
+    }
+
+    private Drawable checkIconCache(String resourceUri) {
+        Drawable.ConstantState cached = mOutsideDrawablesCache.get(resourceUri);
+        if (cached == null) {
+            return null;
+        }
+        if (DBG) Log.d(LOG_TAG, "Found icon in cache: " + resourceUri);
+        return cached.newDrawable();
+    }
+
+    private void storeInIconCache(String resourceUri, Drawable drawable) {
+        if (drawable != null) {
+            mOutsideDrawablesCache.put(resourceUri, drawable.getConstantState());
+        }
+    }
+
+    /**
+     * Gets the left-hand side icon that will be used for the current suggestion
+     * if the suggestion contains an icon column but no icon or a broken icon.
+     *
+     * @param cursor A cursor positioned at the current suggestion.
+     * @return A non-null drawable.
+     */
+    private Drawable getDefaultIcon1(Cursor cursor) {
+        // Fall back to a default icon
+        return mContext.getPackageManager().getDefaultActivityIcon();
+    }
+
+    /**
+     * Gets the activity or application icon for an activity.
+     * Uses the local icon cache for fast repeated lookups.
+     *
+     * @param component Name of an activity.
+     * @return A drawable, or {@code null} if neither the activity nor the application
+     *         has an icon set.
+     */
+    private Drawable getActivityIconWithCache(ComponentName component) {
+        // First check the icon cache
+        String componentIconKey = component.flattenToShortString();
+        // Using containsKey() since we also store null values.
+        if (mOutsideDrawablesCache.containsKey(componentIconKey)) {
+            Drawable.ConstantState cached = mOutsideDrawablesCache.get(componentIconKey);
+            return cached == null ? null : cached.newDrawable(mProviderContext.getResources());
+        }
+        // Then try the activity or application icon
+        Drawable drawable = getActivityIcon(component);
+        // Stick it in the cache so we don't do this lookup again.
+        Drawable.ConstantState toCache = drawable == null ? null : drawable.getConstantState();
+        mOutsideDrawablesCache.put(componentIconKey, toCache);
+        return drawable;
+    }
+
+    /**
+     * Gets the activity or application icon for an activity.
+     *
+     * @param component Name of an activity.
+     * @return A drawable, or {@code null} if neither the acitivy or the application
+     *         have an icon set.
+     */
+    private Drawable getActivityIcon(ComponentName component) {
+        PackageManager pm = mContext.getPackageManager();
+        final ActivityInfo activityInfo;
+        try {
+            activityInfo = pm.getActivityInfo(component, PackageManager.GET_META_DATA);
+        } catch (NameNotFoundException ex) {
+            Log.w(LOG_TAG, ex.toString());
+            return null;
+        }
+        int iconId = activityInfo.getIconResource();
+        if (iconId == 0) return null;
+        String pkg = component.getPackageName();
+        Drawable drawable = pm.getDrawable(pkg, iconId, activityInfo.applicationInfo);
+        if (drawable == null) {
+            Log.w(LOG_TAG, "Invalid icon resource " + iconId + " for "
+                    + component.flattenToShortString());
+            return null;
+        }
+        return drawable;
+    }
+
+    /**
+     * Gets the value of a string column by name.
+     *
+     * @param cursor Cursor to read the value from.
+     * @param columnName The name of the column to read.
+     * @return The value of the given column, or <code>null</null>
+     *         if the cursor does not contain the given column.
+     */
+    public static String getColumnString(Cursor cursor, String columnName) {
+        int col = cursor.getColumnIndex(columnName);
+        return getStringOrNull(cursor, col);
+    }
+
+    private static String getStringOrNull(Cursor cursor, int col) {
+        if (col == INVALID_INDEX) {
+            return null;
+        }
+        try {
+            return cursor.getString(col);
+        } catch (Exception e) {
+            Log.e(LOG_TAG,
+                    "unexpected error retrieving valid column from cursor, "
+                            + "did the remote process die?", e);
+            return null;
+        }
+    }
+}