| /* |
| * 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 android.app; |
| |
| import android.app.SearchManager.DialogCursorProtocol; |
| 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.Resources; |
| import android.database.Cursor; |
| import android.graphics.drawable.ColorDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.DrawableContainer; |
| import android.graphics.drawable.StateListDrawable; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.server.search.SearchableInfo; |
| import android.text.Html; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import android.util.SparseArray; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.ImageView; |
| import android.widget.ResourceCursorAdapter; |
| import android.widget.TextView; |
| import android.widget.Filter; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.WeakHashMap; |
| |
| /** |
| * Provides the contents for the suggestion drop-down list.in {@link SearchDialog}. |
| * |
| * @hide |
| */ |
| class SuggestionsAdapter extends ResourceCursorAdapter { |
| |
| private static final boolean DBG = false; |
| private static final String LOG_TAG = "SuggestionsAdapter"; |
| |
| private SearchManager mSearchManager; |
| private SearchDialog mSearchDialog; |
| private SearchableInfo mSearchable; |
| private Context mProviderContext; |
| private WeakHashMap<String, Drawable.ConstantState> mOutsideDrawablesCache; |
| private SparseArray<Drawable.ConstantState> mBackgroundsCache; |
| private boolean mGlobalSearchMode; |
| private boolean mClosed = false; |
| |
| // Cached column indexes, updated when the cursor changes. |
| private int mFormatCol; |
| private int mText1Col; |
| private int mText2Col; |
| private int mIconName1Col; |
| private int mIconName2Col; |
| private int mBackgroundColorCol; |
| |
| // The extra used to tell a cursor to close itself. This is a hack, see the description by |
| // its use later in this file. |
| private static final String EXTRA_CURSOR_RESPOND_CLOSE_CURSOR = "cursor_respond_close_cursor"; |
| |
| // The bundle which contains {EXTRA_CURSOR_RESPOND_CLOSE_CURSOR=true}, just cached once |
| // so we don't bother recreating it a bunch. |
| private final Bundle mCursorRespondCloseCursorBundle; |
| |
| // This value is stored in SuggestionsAdapter by the SearchDialog to indicate whether |
| // a particular list item should be selected upon the next call to notifyDataSetChanged. |
| // This is used to indicate the index of the "More results..." list item so that when |
| // the data set changes after a click of "More results...", we can correctly tell the |
| // ListView to scroll to the right line item. It gets reset to NONE every time it |
| // is consumed. |
| private int mListItemToSelect = NONE; |
| static final int NONE = -1; |
| |
| // holds the maximum position that has been displayed to the user |
| int mMaxDisplayed = NONE; |
| |
| // holds the position that, when displayed, should result in notifying the cursor |
| int mDisplayNotifyPos = NONE; |
| |
| private final Runnable mStartSpinnerRunnable; |
| private final Runnable mStopSpinnerRunnable; |
| |
| /** |
| * The amount of time we delay in the filter when the user presses the delete key. |
| * @see Filter#setDelayer(android.widget.Filter.Delayer). |
| */ |
| private static final long DELETE_KEY_POST_DELAY = 500L; |
| |
| public SuggestionsAdapter(Context context, SearchDialog searchDialog, |
| SearchableInfo searchable, |
| WeakHashMap<String, Drawable.ConstantState> outsideDrawablesCache, |
| boolean globalSearchMode) { |
| super(context, |
| com.android.internal.R.layout.search_dropdown_item_icons_2line, |
| null, // no initial cursor |
| true); // auto-requery |
| mSearchManager = (SearchManager) mContext.getSystemService(Context.SEARCH_SERVICE); |
| mSearchDialog = searchDialog; |
| mSearchable = searchable; |
| |
| // set up provider resources (gives us icons, etc.) |
| Context activityContext = mSearchable.getActivityContext(mContext); |
| mProviderContext = mSearchable.getProviderContext(mContext, activityContext); |
| |
| mOutsideDrawablesCache = outsideDrawablesCache; |
| mBackgroundsCache = new SparseArray<Drawable.ConstantState>(); |
| mGlobalSearchMode = globalSearchMode; |
| |
| mStartSpinnerRunnable = new Runnable() { |
| public void run() { |
| mSearchDialog.setWorking(true); |
| } |
| }; |
| |
| mStopSpinnerRunnable = new Runnable() { |
| public void run() { |
| mSearchDialog.setWorking(false); |
| } |
| }; |
| |
| // Create this once because we'll reuse it a bunch. |
| mCursorRespondCloseCursorBundle = new Bundle(); |
| mCursorRespondCloseCursorBundle.putBoolean(EXTRA_CURSOR_RESPOND_CLOSE_CURSOR, true); |
| |
| // delay 500ms when deleting |
| 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; |
| } |
| }); |
| } |
| |
| /** |
| * 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(); |
| if (!mGlobalSearchMode) { |
| /** |
| * for in app search we show the progress spinner until the cursor is returned with |
| * the results. for global search we manage the progress bar using |
| * {@link DialogCursorProtocol#POST_REFRESH_RECEIVE_ISPENDING}. |
| */ |
| mSearchDialog.getWindow().getDecorView().post(mStartSpinnerRunnable); |
| } |
| try { |
| final Cursor cursor = mSearchManager.getSuggestions(mSearchable, query); |
| // trigger fill window so the spinner stays up until the results are copied over and |
| // closer to being ready |
| if (!mGlobalSearchMode && cursor != null) cursor.getCount(); |
| return cursor; |
| } catch (RuntimeException e) { |
| Log.w(LOG_TAG, "Search suggestions query threw an exception.", e); |
| return null; |
| } finally { |
| if (!mGlobalSearchMode) { |
| mSearchDialog.getWindow().getDecorView().post(mStopSpinnerRunnable); |
| } |
| } |
| } |
| |
| public void close() { |
| if (DBG) Log.d(LOG_TAG, "close()"); |
| changeCursor(null); |
| mClosed = true; |
| } |
| |
| /** |
| * 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 { |
| Cursor oldCursor = getCursor(); |
| super.changeCursor(c); |
| |
| // We send a special respond to the cursor to tell it to close itself directly because |
| // it may not happen correctly for some cursors currently. This was originally |
| // included as a fix to http://b/2036290, in which the search dialog was holding |
| // on to references to the web search provider unnecessarily. This is being caused by |
| // the fact that the cursor is not being correctly closed in |
| // BulkCursorToCursorAdapter#close, which remains unfixed (see http://b/2015069). |
| // |
| // TODO: Remove this hack once http://b/2015069 is fixed. |
| if (oldCursor != null && oldCursor != c) { |
| oldCursor.respond(mCursorRespondCloseCursorBundle); |
| } |
| |
| if (c != null) { |
| mFormatCol = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_FORMAT); |
| mText1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1); |
| mText2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2); |
| mIconName1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_1); |
| mIconName2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_2); |
| mBackgroundColorCol = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_BACKGROUND_COLOR); |
| } |
| } catch (Exception e) { |
| Log.e(LOG_TAG, "error changing cursor and caching columns", e); |
| } |
| } |
| |
| @Override |
| public void notifyDataSetChanged() { |
| if (DBG) Log.d(LOG_TAG, "notifyDataSetChanged"); |
| super.notifyDataSetChanged(); |
| |
| callCursorPostRefresh(mCursor); |
| |
| // look out for the pending item we are supposed to scroll to |
| if (mListItemToSelect != NONE) { |
| mSearchDialog.setListSelection(mListItemToSelect); |
| mListItemToSelect = NONE; |
| } |
| } |
| |
| /** |
| * Handle sending and receiving information associated with |
| * {@link DialogCursorProtocol#POST_REFRESH}. |
| * |
| * @param cursor The cursor to call. |
| */ |
| private void callCursorPostRefresh(Cursor cursor) { |
| if (!mGlobalSearchMode) return; |
| final Bundle request = new Bundle(); |
| request.putInt(DialogCursorProtocol.METHOD, DialogCursorProtocol.POST_REFRESH); |
| final Bundle response = cursor.respond(request); |
| |
| mSearchDialog.setWorking( |
| response.getBoolean(DialogCursorProtocol.POST_REFRESH_RECEIVE_ISPENDING, false)); |
| |
| mDisplayNotifyPos = |
| response.getInt(DialogCursorProtocol.POST_REFRESH_RECEIVE_DISPLAY_NOTIFY, -1); |
| } |
| |
| /** |
| * Tell the cursor which position was clicked, handling sending and receiving information |
| * associated with {@link DialogCursorProtocol#CLICK}. |
| * |
| * @param cursor The cursor |
| * @param position The position that was clicked. |
| */ |
| void callCursorOnClick(Cursor cursor, int position) { |
| if (!mGlobalSearchMode) return; |
| final Bundle request = new Bundle(3); |
| request.putInt(DialogCursorProtocol.METHOD, DialogCursorProtocol.CLICK); |
| request.putInt(DialogCursorProtocol.CLICK_SEND_POSITION, position); |
| request.putInt(DialogCursorProtocol.CLICK_SEND_MAX_DISPLAY_POS, mMaxDisplayed); |
| final Bundle response = cursor.respond(request); |
| mMaxDisplayed = -1; |
| mListItemToSelect = response.getInt( |
| DialogCursorProtocol.CLICK_RECEIVE_SELECTED_POS, SuggestionsAdapter.NONE); |
| } |
| |
| /** |
| * Tell the cursor that a search was started without using a suggestion. |
| * |
| * @param query The search query. |
| */ |
| void reportSearch(String query) { |
| if (!mGlobalSearchMode) return; |
| Cursor cursor = getCursor(); |
| if (cursor == null) return; |
| final Bundle request = new Bundle(3); |
| request.putInt(DialogCursorProtocol.METHOD, DialogCursorProtocol.SEARCH); |
| request.putString(DialogCursorProtocol.SEARCH_SEND_QUERY, query); |
| request.putInt(DialogCursorProtocol.SEARCH_SEND_MAX_DISPLAY_POS, mMaxDisplayed); |
| // the response is always empty |
| cursor.respond(request); |
| } |
| |
| /** |
| * 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 ChildViewCache(View v) { |
| mText1 = (TextView) v.findViewById(com.android.internal.R.id.text1); |
| mText2 = (TextView) v.findViewById(com.android.internal.R.id.text2); |
| mIcon1 = (ImageView) v.findViewById(com.android.internal.R.id.icon1); |
| mIcon2 = (ImageView) v.findViewById(com.android.internal.R.id.icon2); |
| } |
| } |
| |
| @Override |
| public void bindView(View view, Context context, Cursor cursor) { |
| ChildViewCache views = (ChildViewCache) view.getTag(); |
| final int pos = cursor.getPosition(); |
| |
| // update the maximum position displayed since last refresh |
| if (pos > mMaxDisplayed) { |
| mMaxDisplayed = pos; |
| } |
| |
| // if the cursor wishes to be notified about this position, send it |
| if (mGlobalSearchMode && mDisplayNotifyPos != NONE && pos == mDisplayNotifyPos) { |
| final Bundle request = new Bundle(); |
| request.putInt(DialogCursorProtocol.METHOD, DialogCursorProtocol.THRESH_HIT); |
| mCursor.respond(request); |
| mDisplayNotifyPos = NONE; // only notify the first time |
| } |
| |
| int backgroundColor = 0; |
| if (mBackgroundColorCol != -1) { |
| backgroundColor = cursor.getInt(mBackgroundColorCol); |
| } |
| Drawable background = getItemBackground(backgroundColor); |
| view.setBackgroundDrawable(background); |
| |
| final boolean isHtml = mFormatCol > 0 && "html".equals(cursor.getString(mFormatCol)); |
| setViewText(cursor, views.mText1, mText1Col, isHtml); |
| setViewText(cursor, views.mText2, mText2Col, isHtml); |
| |
| if (views.mIcon1 != null) { |
| setViewDrawable(views.mIcon1, getIcon1(cursor)); |
| } |
| if (views.mIcon2 != null) { |
| setViewDrawable(views.mIcon2, getIcon2(cursor)); |
| } |
| } |
| |
| /** |
| * Gets a drawable with no color when selected or pressed, and the given color when |
| * neither selected nor pressed. |
| * |
| * @return A drawable, or {@code null} if the given color is transparent. |
| */ |
| private Drawable getItemBackground(int backgroundColor) { |
| if (backgroundColor == 0) { |
| return null; |
| } else { |
| Drawable.ConstantState cachedBg = mBackgroundsCache.get(backgroundColor); |
| if (cachedBg != null) { |
| if (DBG) Log.d(LOG_TAG, "Background cache hit for color " + backgroundColor); |
| return cachedBg.newDrawable(mProviderContext.getResources()); |
| } |
| if (DBG) Log.d(LOG_TAG, "Creating new background for color " + backgroundColor); |
| ColorDrawable transparent = new ColorDrawable(0); |
| ColorDrawable background = new ColorDrawable(backgroundColor); |
| StateListDrawable newBg = new StateListDrawable(); |
| newBg.addState(new int[]{android.R.attr.state_selected}, transparent); |
| newBg.addState(new int[]{android.R.attr.state_pressed}, transparent); |
| newBg.addState(new int[]{}, background); |
| mBackgroundsCache.put(backgroundColor, newBg.getConstantState()); |
| return newBg; |
| } |
| } |
| |
| private void setViewText(Cursor cursor, TextView v, int textCol, boolean isHtml) { |
| if (v == null) { |
| return; |
| } |
| CharSequence text = null; |
| if (textCol >= 0) { |
| String str = cursor.getString(textCol); |
| if (isHtml && looksLikeHtml(str)) { |
| text = Html.fromHtml(str); |
| } else { |
| text = str; |
| } |
| } |
| // 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 static boolean looksLikeHtml(String str) { |
| if (TextUtils.isEmpty(str)) return false; |
| for (int i = str.length() - 1; i >= 0; i--) { |
| char c = str.charAt(i); |
| if (c == '<' || c == '&') return true; |
| } |
| return false; |
| } |
| |
| private Drawable getIcon1(Cursor cursor) { |
| if (mIconName1Col < 0) { |
| 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 < 0) { |
| 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) { |
| // 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(View.GONE); |
| } 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; |
| } |
| |
| if (mSearchable.shouldRewriteQueryFromData()) { |
| String data = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_INTENT_DATA); |
| if (data != null) { |
| return data; |
| } |
| } |
| |
| if (mSearchable.shouldRewriteQueryFromText()) { |
| String text1 = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_TEXT_1); |
| if (text1 != null) { |
| return text1; |
| } |
| } |
| |
| 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; |
| } |
| |
| // First, check the cache. |
| Drawable.ConstantState cached = mOutsideDrawablesCache.get(drawableId); |
| if (cached != null) { |
| if (DBG) Log.d(LOG_TAG, "Found icon in cache: " + drawableId); |
| return cached.newDrawable(mProviderContext.getResources()); |
| } |
| |
| Drawable drawable = null; |
| try { |
| // Not cached, try using it as a plain resource ID in the provider's context. |
| int resourceId = Integer.parseInt(drawableId); |
| drawable = mProviderContext.getResources().getDrawable(resourceId); |
| if (DBG) Log.d(LOG_TAG, "Found icon by resource ID: " + drawableId); |
| } catch (NumberFormatException nfe) { |
| // The id was not an integer resource id. |
| // Let the ContentResolver handle content, android.resource and file URIs. |
| try { |
| Uri uri = Uri.parse(drawableId); |
| InputStream stream = mProviderContext.getContentResolver().openInputStream(uri); |
| if (stream != null) { |
| try { |
| drawable = Drawable.createFromStream(stream, null); |
| } finally { |
| try { |
| stream.close(); |
| } catch (IOException ex) { |
| Log.e(LOG_TAG, "Error closing icon stream for " + uri, ex); |
| } |
| } |
| } |
| if (DBG) Log.d(LOG_TAG, "Opened icon input stream: " + drawableId); |
| } catch (FileNotFoundException fnfe) { |
| if (DBG) Log.d(LOG_TAG, "Icon stream not found: " + drawableId); |
| // drawable = null; |
| } |
| |
| // If we got a drawable for this resource id, then stick it in the |
| // map so we don't do this lookup again. |
| if (drawable != null) { |
| mOutsideDrawablesCache.put(drawableId, drawable.getConstantState()); |
| } |
| } catch (Resources.NotFoundException nfe) { |
| if (DBG) Log.d(LOG_TAG, "Icon resource not found: " + drawableId); |
| // drawable = null; |
| } |
| |
| return drawable; |
| } |
| |
| /** |
| * 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) { |
| // First check the component that the suggestion is originally from |
| String c = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_INTENT_COMPONENT_NAME); |
| if (c != null) { |
| ComponentName component = ComponentName.unflattenFromString(c); |
| if (component != null) { |
| Drawable drawable = getActivityIconWithCache(component); |
| if (drawable != null) { |
| return drawable; |
| } |
| } else { |
| Log.w(LOG_TAG, "Bad component name: " + c); |
| } |
| } |
| |
| // Then check the component that gave us the suggestion |
| Drawable drawable = getActivityIconWithCache(mSearchable.getSearchActivity()); |
| if (drawable != null) { |
| return drawable; |
| } |
| |
| // 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); |
| if (col == NONE) { |
| 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; |
| } |
| } |
| |
| } |