| /* |
| * 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.widget; |
| |
| import android.app.SearchDialog; |
| import android.app.SearchManager; |
| import android.app.SearchableInfo; |
| import android.content.ComponentName; |
| import android.content.ContentResolver; |
| import android.content.ContentResolver.OpenResourceIdResult; |
| 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.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 com.android.internal.R; |
| |
| 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 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 final SearchManager mSearchManager; |
| private final SearchView mSearchView; |
| private final SearchableInfo mSearchable; |
| private final Context mProviderContext; |
| private final WeakHashMap<String, Drawable.ConstantState> mOutsideDrawablesCache; |
| private final int mCommitIconResId; |
| |
| 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. |
| * @see Filter#setDelayer(android.widget.Filter.Delayer). |
| */ |
| private static final long DELETE_KEY_POST_DELAY = 500L; |
| |
| public SuggestionsAdapter(Context context, SearchView searchView, SearchableInfo searchable, |
| WeakHashMap<String, Drawable.ConstantState> outsideDrawablesCache) { |
| super(context, searchView.getSuggestionRowLayout(), null /* no initial cursor */, |
| true /* auto-requery */); |
| |
| mSearchManager = (SearchManager) mContext.getSystemService(Context.SEARCH_SERVICE); |
| mSearchView = searchView; |
| mSearchable = searchable; |
| mCommitIconResId = searchView.getSuggestionCommitIconResId(); |
| |
| // set up provider resources (gives us icons, etc.) |
| final Context activityContext = mSearchable.getActivityContext(mContext); |
| mProviderContext = mSearchable.getProviderContext(mContext, activityContext); |
| |
| 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 |
| 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 = mSearchManager.getSuggestions(mSearchable, 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 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) { |
| final View v = super.newView(context, cursor, parent); |
| v.setTag(new ChildViewCache(v)); |
| |
| // Set up icon. |
| final ImageView iconRefine = v.findViewById(R.id.edit_query); |
| iconRefine.setImageResource(mCommitIconResId); |
| |
| 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 = v.findViewById(com.android.internal.R.id.text1); |
| mText2 = v.findViewById(com.android.internal.R.id.text2); |
| mIcon1 = v.findViewById(com.android.internal.R.id.icon1); |
| mIcon2 = v.findViewById(com.android.internal.R.id.icon2); |
| mIconRefine = v.findViewById(com.android.internal.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(context, 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(Context context, CharSequence url) { |
| if (mUrlColor == null) { |
| // Lazily get the URL color from the current theme. |
| TypedValue colorValue = new TypedValue(); |
| context.getTheme().resolveAttribute(R.attr.textColorSearchUrl, colorValue, true); |
| mUrlColor = context.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; |
| } |
| |
| 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; |
| } |
| } |
| |
| /** |
| * This method is overridden purely to provide a bit of protection against |
| * flaky content providers. |
| * |
| * @see android.widget.CursorAdapter#getDropDownView(int, View, ViewGroup) |
| */ |
| @Override |
| public View getDropDownView(int position, View convertView, ViewGroup parent) { |
| try { |
| return super.getDropDownView(position, convertView, parent); |
| } catch (RuntimeException e) { |
| Log.w(LOG_TAG, "Search suggestions cursor threw exception.", e); |
| // Put exception string in item title |
| final Context context = mDropDownContext == null ? mContext : mDropDownContext; |
| final View v = newDropDownView(context, mCursor, parent); |
| if (v != null) { |
| final ChildViewCache views = (ChildViewCache) v.getTag(); |
| final 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.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 |
| OpenResourceIdResult r = |
| mProviderContext.getContentResolver().getResourceId(uri); |
| try { |
| return r.r.getDrawable(r.id, mProviderContext.getTheme()); |
| } 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; |
| } |
| } |
| |
| 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) { |
| // 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); |
| 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; |
| } |
| } |
| } |
