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[android_tools.git] / sdk / sources / android-25 / android / widget / SuggestionsAdapter.java
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1 /*
2 * Copyright (C) 2009 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package android.widget;
19 import android.app.SearchDialog;
20 import android.app.SearchManager;
21 import android.app.SearchableInfo;
22 import android.content.ComponentName;
23 import android.content.ContentResolver;
24 import android.content.Context;
25 import android.content.ContentResolver.OpenResourceIdResult;
26 import android.content.pm.ActivityInfo;
27 import android.content.pm.PackageManager;
28 import android.content.pm.PackageManager.NameNotFoundException;
29 import android.content.res.ColorStateList;
30 import android.content.res.Resources;
31 import android.database.Cursor;
32 import android.graphics.drawable.Drawable;
33 import android.net.Uri;
34 import android.os.Bundle;
35 import android.text.Spannable;
36 import android.text.SpannableString;
37 import android.text.TextUtils;
38 import android.text.style.TextAppearanceSpan;
39 import android.util.Log;
40 import android.util.TypedValue;
41 import android.view.View;
42 import android.view.ViewGroup;
43 import android.view.View.OnClickListener;
45 import com.android.internal.R;
47 import java.io.FileNotFoundException;
48 import java.io.IOException;
49 import java.io.InputStream;
50 import java.util.WeakHashMap;
52 /**
53 * Provides the contents for the suggestion drop-down list.in {@link SearchDialog}.
55 * @hide
57 class SuggestionsAdapter extends ResourceCursorAdapter implements OnClickListener {
59 private static final boolean DBG = false;
60 private static final String LOG_TAG = "SuggestionsAdapter";
61 private static final int QUERY_LIMIT = 50;
63 static final int REFINE_NONE = 0;
64 static final int REFINE_BY_ENTRY = 1;
65 static final int REFINE_ALL = 2;
67 private final SearchManager mSearchManager;
68 private final SearchView mSearchView;
69 private final SearchableInfo mSearchable;
70 private final Context mProviderContext;
71 private final WeakHashMap<String, Drawable.ConstantState> mOutsideDrawablesCache;
72 private final int mCommitIconResId;
74 private boolean mClosed = false;
75 private int mQueryRefinement = REFINE_BY_ENTRY;
77 // URL color
78 private ColorStateList mUrlColor;
80 static final int INVALID_INDEX = -1;
82 // Cached column indexes, updated when the cursor changes.
83 private int mText1Col = INVALID_INDEX;
84 private int mText2Col = INVALID_INDEX;
85 private int mText2UrlCol = INVALID_INDEX;
86 private int mIconName1Col = INVALID_INDEX;
87 private int mIconName2Col = INVALID_INDEX;
88 private int mFlagsCol = INVALID_INDEX;
90 // private final Runnable mStartSpinnerRunnable;
91 // private final Runnable mStopSpinnerRunnable;
93 /**
94 * The amount of time we delay in the filter when the user presses the delete key.
95 * @see Filter#setDelayer(android.widget.Filter.Delayer).
97 private static final long DELETE_KEY_POST_DELAY = 500L;
99 public SuggestionsAdapter(Context context, SearchView searchView, SearchableInfo searchable,
100 WeakHashMap<String, Drawable.ConstantState> outsideDrawablesCache) {
101 super(context, searchView.getSuggestionRowLayout(), null /* no initial cursor */,
102 true /* auto-requery */);
104 mSearchManager = (SearchManager) mContext.getSystemService(Context.SEARCH_SERVICE);
105 mSearchView = searchView;
106 mSearchable = searchable;
107 mCommitIconResId = searchView.getSuggestionCommitIconResId();
109 // set up provider resources (gives us icons, etc.)
110 final Context activityContext = mSearchable.getActivityContext(mContext);
111 mProviderContext = mSearchable.getProviderContext(mContext, activityContext);
113 mOutsideDrawablesCache = outsideDrawablesCache;
115 // mStartSpinnerRunnable = new Runnable() {
116 // public void run() {
117 // // mSearchView.setWorking(true); // TODO:
118 // }
119 // };
121 // mStopSpinnerRunnable = new Runnable() {
122 // public void run() {
123 // // mSearchView.setWorking(false); // TODO:
124 // }
125 // };
127 // delay 500ms when deleting
128 getFilter().setDelayer(new Filter.Delayer() {
130 private int mPreviousLength = 0;
132 public long getPostingDelay(CharSequence constraint) {
133 if (constraint == null) return 0;
135 long delay = constraint.length() < mPreviousLength ? DELETE_KEY_POST_DELAY : 0;
136 mPreviousLength = constraint.length();
137 return delay;
143 * Enables query refinement for all suggestions. This means that an additional icon
144 * will be shown for each entry. When clicked, the suggested text on that line will be
145 * copied to the query text field.
146 * <p>
148 * @param refineWhat which queries to refine. Possible values are
149 * {@link #REFINE_NONE}, {@link #REFINE_BY_ENTRY}, and
150 * {@link #REFINE_ALL}.
152 public void setQueryRefinement(int refineWhat) {
153 mQueryRefinement = refineWhat;
157 * Returns the current query refinement preference.
158 * @return value of query refinement preference
160 public int getQueryRefinement() {
161 return mQueryRefinement;
165 * Overridden to always return <code>false</code>, since we cannot be sure that
166 * suggestion sources return stable IDs.
168 @Override
169 public boolean hasStableIds() {
170 return false;
174 * Use the search suggestions provider to obtain a live cursor. This will be called
175 * in a worker thread, so it's OK if the query is slow (e.g. round trip for suggestions).
176 * The results will be processed in the UI thread and changeCursor() will be called.
178 @Override
179 public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
180 if (DBG) Log.d(LOG_TAG, "runQueryOnBackgroundThread(" + constraint + ")");
181 String query = (constraint == null) ? "" : constraint.toString();
183 * for in app search we show the progress spinner until the cursor is returned with
184 * the results.
186 Cursor cursor = null;
187 if (mSearchView.getVisibility() != View.VISIBLE
188 || mSearchView.getWindowVisibility() != View.VISIBLE) {
189 return null;
191 //mSearchView.getWindow().getDecorView().post(mStartSpinnerRunnable); // TODO:
192 try {
193 cursor = mSearchManager.getSuggestions(mSearchable, query, QUERY_LIMIT);
194 // trigger fill window so the spinner stays up until the results are copied over and
195 // closer to being ready
196 if (cursor != null) {
197 cursor.getCount();
198 return cursor;
200 } catch (RuntimeException e) {
201 Log.w(LOG_TAG, "Search suggestions query threw an exception.", e);
203 // If cursor is null or an exception was thrown, stop the spinner and return null.
204 // changeCursor doesn't get called if cursor is null
205 // mSearchView.getWindow().getDecorView().post(mStopSpinnerRunnable); // TODO:
206 return null;
209 public void close() {
210 if (DBG) Log.d(LOG_TAG, "close()");
211 changeCursor(null);
212 mClosed = true;
215 @Override
216 public void notifyDataSetChanged() {
217 if (DBG) Log.d(LOG_TAG, "notifyDataSetChanged");
218 super.notifyDataSetChanged();
220 // mSearchView.onDataSetChanged(); // TODO:
222 updateSpinnerState(getCursor());
225 @Override
226 public void notifyDataSetInvalidated() {
227 if (DBG) Log.d(LOG_TAG, "notifyDataSetInvalidated");
228 super.notifyDataSetInvalidated();
230 updateSpinnerState(getCursor());
233 private void updateSpinnerState(Cursor cursor) {
234 Bundle extras = cursor != null ? cursor.getExtras() : null;
235 if (DBG) {
236 Log.d(LOG_TAG, "updateSpinnerState - extra = "
237 + (extras != null
238 ? extras.getBoolean(SearchManager.CURSOR_EXTRA_KEY_IN_PROGRESS)
239 : null));
241 // Check if the Cursor indicates that the query is not complete and show the spinner
242 if (extras != null
243 && extras.getBoolean(SearchManager.CURSOR_EXTRA_KEY_IN_PROGRESS)) {
244 // mSearchView.getWindow().getDecorView().post(mStartSpinnerRunnable); // TODO:
245 return;
247 // If cursor is null or is done, stop the spinner
248 // mSearchView.getWindow().getDecorView().post(mStopSpinnerRunnable); // TODO:
252 * Cache columns.
254 @Override
255 public void changeCursor(Cursor c) {
256 if (DBG) Log.d(LOG_TAG, "changeCursor(" + c + ")");
258 if (mClosed) {
259 Log.w(LOG_TAG, "Tried to change cursor after adapter was closed.");
260 if (c != null) c.close();
261 return;
264 try {
265 super.changeCursor(c);
267 if (c != null) {
268 mText1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1);
269 mText2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2);
270 mText2UrlCol = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2_URL);
271 mIconName1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_1);
272 mIconName2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_2);
273 mFlagsCol = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_FLAGS);
275 } catch (Exception e) {
276 Log.e(LOG_TAG, "error changing cursor and caching columns", e);
281 * Tags the view with cached child view look-ups.
283 @Override
284 public View newView(Context context, Cursor cursor, ViewGroup parent) {
285 final View v = super.newView(context, cursor, parent);
286 v.setTag(new ChildViewCache(v));
288 // Set up icon.
289 final ImageView iconRefine = (ImageView) v.findViewById(R.id.edit_query);
290 iconRefine.setImageResource(mCommitIconResId);
292 return v;
296 * Cache of the child views of drop-drown list items, to avoid looking up the children
297 * each time the contents of a list item are changed.
299 private final static class ChildViewCache {
300 public final TextView mText1;
301 public final TextView mText2;
302 public final ImageView mIcon1;
303 public final ImageView mIcon2;
304 public final ImageView mIconRefine;
306 public ChildViewCache(View v) {
307 mText1 = (TextView) v.findViewById(com.android.internal.R.id.text1);
308 mText2 = (TextView) v.findViewById(com.android.internal.R.id.text2);
309 mIcon1 = (ImageView) v.findViewById(com.android.internal.R.id.icon1);
310 mIcon2 = (ImageView) v.findViewById(com.android.internal.R.id.icon2);
311 mIconRefine = (ImageView) v.findViewById(com.android.internal.R.id.edit_query);
315 @Override
316 public void bindView(View view, Context context, Cursor cursor) {
317 ChildViewCache views = (ChildViewCache) view.getTag();
319 int flags = 0;
320 if (mFlagsCol != INVALID_INDEX) {
321 flags = cursor.getInt(mFlagsCol);
323 if (views.mText1 != null) {
324 String text1 = getStringOrNull(cursor, mText1Col);
325 setViewText(views.mText1, text1);
327 if (views.mText2 != null) {
328 // First check TEXT_2_URL
329 CharSequence text2 = getStringOrNull(cursor, mText2UrlCol);
330 if (text2 != null) {
331 text2 = formatUrl(context, text2);
332 } else {
333 text2 = getStringOrNull(cursor, mText2Col);
336 // If no second line of text is indicated, allow the first line of text
337 // to be up to two lines if it wants to be.
338 if (TextUtils.isEmpty(text2)) {
339 if (views.mText1 != null) {
340 views.mText1.setSingleLine(false);
341 views.mText1.setMaxLines(2);
343 } else {
344 if (views.mText1 != null) {
345 views.mText1.setSingleLine(true);
346 views.mText1.setMaxLines(1);
349 setViewText(views.mText2, text2);
352 if (views.mIcon1 != null) {
353 setViewDrawable(views.mIcon1, getIcon1(cursor), View.INVISIBLE);
355 if (views.mIcon2 != null) {
356 setViewDrawable(views.mIcon2, getIcon2(cursor), View.GONE);
358 if (mQueryRefinement == REFINE_ALL
359 || (mQueryRefinement == REFINE_BY_ENTRY
360 && (flags & SearchManager.FLAG_QUERY_REFINEMENT) != 0)) {
361 views.mIconRefine.setVisibility(View.VISIBLE);
362 views.mIconRefine.setTag(views.mText1.getText());
363 views.mIconRefine.setOnClickListener(this);
364 } else {
365 views.mIconRefine.setVisibility(View.GONE);
369 public void onClick(View v) {
370 Object tag = v.getTag();
371 if (tag instanceof CharSequence) {
372 mSearchView.onQueryRefine((CharSequence) tag);
376 private CharSequence formatUrl(Context context, CharSequence url) {
377 if (mUrlColor == null) {
378 // Lazily get the URL color from the current theme.
379 TypedValue colorValue = new TypedValue();
380 context.getTheme().resolveAttribute(R.attr.textColorSearchUrl, colorValue, true);
381 mUrlColor = context.getColorStateList(colorValue.resourceId);
384 SpannableString text = new SpannableString(url);
385 text.setSpan(new TextAppearanceSpan(null, 0, 0, mUrlColor, null),
386 0, url.length(),
387 Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
388 return text;
391 private void setViewText(TextView v, CharSequence text) {
392 // Set the text even if it's null, since we need to clear any previous text.
393 v.setText(text);
395 if (TextUtils.isEmpty(text)) {
396 v.setVisibility(View.GONE);
397 } else {
398 v.setVisibility(View.VISIBLE);
402 private Drawable getIcon1(Cursor cursor) {
403 if (mIconName1Col == INVALID_INDEX) {
404 return null;
406 String value = cursor.getString(mIconName1Col);
407 Drawable drawable = getDrawableFromResourceValue(value);
408 if (drawable != null) {
409 return drawable;
411 return getDefaultIcon1(cursor);
414 private Drawable getIcon2(Cursor cursor) {
415 if (mIconName2Col == INVALID_INDEX) {
416 return null;
418 String value = cursor.getString(mIconName2Col);
419 return getDrawableFromResourceValue(value);
423 * Sets the drawable in an image view, makes sure the view is only visible if there
424 * is a drawable.
426 private void setViewDrawable(ImageView v, Drawable drawable, int nullVisibility) {
427 // Set the icon even if the drawable is null, since we need to clear any
428 // previous icon.
429 v.setImageDrawable(drawable);
431 if (drawable == null) {
432 v.setVisibility(nullVisibility);
433 } else {
434 v.setVisibility(View.VISIBLE);
436 // This is a hack to get any animated drawables (like a 'working' spinner)
437 // to animate. You have to setVisible true on an AnimationDrawable to get
438 // it to start animating, but it must first have been false or else the
439 // call to setVisible will be ineffective. We need to clear up the story
440 // about animated drawables in the future, see http://b/1878430.
441 drawable.setVisible(false, false);
442 drawable.setVisible(true, false);
447 * Gets the text to show in the query field when a suggestion is selected.
449 * @param cursor The Cursor to read the suggestion data from. The Cursor should already
450 * be moved to the suggestion that is to be read from.
451 * @return The text to show, or <code>null</code> if the query should not be
452 * changed when selecting this suggestion.
454 @Override
455 public CharSequence convertToString(Cursor cursor) {
456 if (cursor == null) {
457 return null;
460 String query = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_QUERY);
461 if (query != null) {
462 return query;
465 if (mSearchable.shouldRewriteQueryFromData()) {
466 String data = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_INTENT_DATA);
467 if (data != null) {
468 return data;
472 if (mSearchable.shouldRewriteQueryFromText()) {
473 String text1 = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_TEXT_1);
474 if (text1 != null) {
475 return text1;
479 return null;
483 * This method is overridden purely to provide a bit of protection against
484 * flaky content providers.
486 * @see android.widget.ListAdapter#getView(int, View, ViewGroup)
488 @Override
489 public View getView(int position, View convertView, ViewGroup parent) {
490 try {
491 return super.getView(position, convertView, parent);
492 } catch (RuntimeException e) {
493 Log.w(LOG_TAG, "Search suggestions cursor threw exception.", e);
494 // Put exception string in item title
495 View v = newView(mContext, mCursor, parent);
496 if (v != null) {
497 ChildViewCache views = (ChildViewCache) v.getTag();
498 TextView tv = views.mText1;
499 tv.setText(e.toString());
501 return v;
506 * This method is overridden purely to provide a bit of protection against
507 * flaky content providers.
509 * @see android.widget.CursorAdapter#getDropDownView(int, View, ViewGroup)
511 @Override
512 public View getDropDownView(int position, View convertView, ViewGroup parent) {
513 try {
514 return super.getDropDownView(position, convertView, parent);
515 } catch (RuntimeException e) {
516 Log.w(LOG_TAG, "Search suggestions cursor threw exception.", e);
517 // Put exception string in item title
518 final Context context = mDropDownContext == null ? mContext : mDropDownContext;
519 final View v = newDropDownView(context, mCursor, parent);
520 if (v != null) {
521 final ChildViewCache views = (ChildViewCache) v.getTag();
522 final TextView tv = views.mText1;
523 tv.setText(e.toString());
525 return v;
530 * Gets a drawable given a value provided by a suggestion provider.
532 * This value could be just the string value of a resource id
533 * (e.g., "2130837524"), in which case we will try to retrieve a drawable from
534 * the provider's resources. If the value is not an integer, it is
535 * treated as a Uri and opened with
536 * {@link ContentResolver#openOutputStream(android.net.Uri, String)}.
538 * All resources and URIs are read using the suggestion provider's context.
540 * If the string is not formatted as expected, or no drawable can be found for
541 * the provided value, this method returns null.
543 * @param drawableId a string like "2130837524",
544 * "android.resource://com.android.alarmclock/2130837524",
545 * or "content://contacts/photos/253".
546 * @return a Drawable, or null if none found
548 private Drawable getDrawableFromResourceValue(String drawableId) {
549 if (drawableId == null || drawableId.length() == 0 || "0".equals(drawableId)) {
550 return null;
552 try {
553 // First, see if it's just an integer
554 int resourceId = Integer.parseInt(drawableId);
555 // It's an int, look for it in the cache
556 String drawableUri = ContentResolver.SCHEME_ANDROID_RESOURCE
557 + "://" + mProviderContext.getPackageName() + "/" + resourceId;
558 // Must use URI as cache key, since ints are app-specific
559 Drawable drawable = checkIconCache(drawableUri);
560 if (drawable != null) {
561 return drawable;
563 // Not cached, find it by resource ID
564 drawable = mProviderContext.getDrawable(resourceId);
565 // Stick it in the cache, using the URI as key
566 storeInIconCache(drawableUri, drawable);
567 return drawable;
568 } catch (NumberFormatException nfe) {
569 // It's not an integer, use it as a URI
570 Drawable drawable = checkIconCache(drawableId);
571 if (drawable != null) {
572 return drawable;
574 Uri uri = Uri.parse(drawableId);
575 drawable = getDrawable(uri);
576 storeInIconCache(drawableId, drawable);
577 return drawable;
578 } catch (Resources.NotFoundException nfe) {
579 // It was an integer, but it couldn't be found, bail out
580 Log.w(LOG_TAG, "Icon resource not found: " + drawableId);
581 return null;
586 * Gets a drawable by URI, without using the cache.
588 * @return A drawable, or {@code null} if the drawable could not be loaded.
590 private Drawable getDrawable(Uri uri) {
591 try {
592 String scheme = uri.getScheme();
593 if (ContentResolver.SCHEME_ANDROID_RESOURCE.equals(scheme)) {
594 // Load drawables through Resources, to get the source density information
595 OpenResourceIdResult r =
596 mProviderContext.getContentResolver().getResourceId(uri);
597 try {
598 return r.r.getDrawable(r.id, mProviderContext.getTheme());
599 } catch (Resources.NotFoundException ex) {
600 throw new FileNotFoundException("Resource does not exist: " + uri);
602 } else {
603 // Let the ContentResolver handle content and file URIs.
604 InputStream stream = mProviderContext.getContentResolver().openInputStream(uri);
605 if (stream == null) {
606 throw new FileNotFoundException("Failed to open " + uri);
608 try {
609 return Drawable.createFromStream(stream, null);
610 } finally {
611 try {
612 stream.close();
613 } catch (IOException ex) {
614 Log.e(LOG_TAG, "Error closing icon stream for " + uri, ex);
618 } catch (FileNotFoundException fnfe) {
619 Log.w(LOG_TAG, "Icon not found: " + uri + ", " + fnfe.getMessage());
620 return null;
624 private Drawable checkIconCache(String resourceUri) {
625 Drawable.ConstantState cached = mOutsideDrawablesCache.get(resourceUri);
626 if (cached == null) {
627 return null;
629 if (DBG) Log.d(LOG_TAG, "Found icon in cache: " + resourceUri);
630 return cached.newDrawable();
633 private void storeInIconCache(String resourceUri, Drawable drawable) {
634 if (drawable != null) {
635 mOutsideDrawablesCache.put(resourceUri, drawable.getConstantState());
640 * Gets the left-hand side icon that will be used for the current suggestion
641 * if the suggestion contains an icon column but no icon or a broken icon.
643 * @param cursor A cursor positioned at the current suggestion.
644 * @return A non-null drawable.
646 private Drawable getDefaultIcon1(Cursor cursor) {
647 // Check the component that gave us the suggestion
648 Drawable drawable = getActivityIconWithCache(mSearchable.getSearchActivity());
649 if (drawable != null) {
650 return drawable;
653 // Fall back to a default icon
654 return mContext.getPackageManager().getDefaultActivityIcon();
658 * Gets the activity or application icon for an activity.
659 * Uses the local icon cache for fast repeated lookups.
661 * @param component Name of an activity.
662 * @return A drawable, or {@code null} if neither the activity nor the application
663 * has an icon set.
665 private Drawable getActivityIconWithCache(ComponentName component) {
666 // First check the icon cache
667 String componentIconKey = component.flattenToShortString();
668 // Using containsKey() since we also store null values.
669 if (mOutsideDrawablesCache.containsKey(componentIconKey)) {
670 Drawable.ConstantState cached = mOutsideDrawablesCache.get(componentIconKey);
671 return cached == null ? null : cached.newDrawable(mProviderContext.getResources());
673 // Then try the activity or application icon
674 Drawable drawable = getActivityIcon(component);
675 // Stick it in the cache so we don't do this lookup again.
676 Drawable.ConstantState toCache = drawable == null ? null : drawable.getConstantState();
677 mOutsideDrawablesCache.put(componentIconKey, toCache);
678 return drawable;
682 * Gets the activity or application icon for an activity.
684 * @param component Name of an activity.
685 * @return A drawable, or {@code null} if neither the acitivy or the application
686 * have an icon set.
688 private Drawable getActivityIcon(ComponentName component) {
689 PackageManager pm = mContext.getPackageManager();
690 final ActivityInfo activityInfo;
691 try {
692 activityInfo = pm.getActivityInfo(component, PackageManager.GET_META_DATA);
693 } catch (NameNotFoundException ex) {
694 Log.w(LOG_TAG, ex.toString());
695 return null;
697 int iconId = activityInfo.getIconResource();
698 if (iconId == 0) return null;
699 String pkg = component.getPackageName();
700 Drawable drawable = pm.getDrawable(pkg, iconId, activityInfo.applicationInfo);
701 if (drawable == null) {
702 Log.w(LOG_TAG, "Invalid icon resource " + iconId + " for "
703 + component.flattenToShortString());
704 return null;
706 return drawable;
710 * Gets the value of a string column by name.
712 * @param cursor Cursor to read the value from.
713 * @param columnName The name of the column to read.
714 * @return The value of the given column, or <code>null</null>
715 * if the cursor does not contain the given column.
717 public static String getColumnString(Cursor cursor, String columnName) {
718 int col = cursor.getColumnIndex(columnName);
719 return getStringOrNull(cursor, col);
722 private static String getStringOrNull(Cursor cursor, int col) {
723 if (col == INVALID_INDEX) {
724 return null;
726 try {
727 return cursor.getString(col);
728 } catch (Exception e) {
729 Log.e(LOG_TAG,
730 "unexpected error retrieving valid column from cursor, "
731 + "did the remote process die?", e);
732 return null;