/*
* 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.ContentResolver.OpenResourceIdResult;
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.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.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.ImageView;
import android.widget.ResourceCursorAdapter;
import android.widget.TextView;
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 static final int QUERY_LIMIT = 50;
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, QUERY_LIMIT);
// 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, int actionKey, String actionMsg) {
if (!mGlobalSearchMode) return;
final Bundle request = new Bundle(5);
request.putInt(DialogCursorProtocol.METHOD, DialogCursorProtocol.CLICK);
request.putInt(DialogCursorProtocol.CLICK_SEND_POSITION, position);
request.putInt(DialogCursorProtocol.CLICK_SEND_MAX_DISPLAY_POS, mMaxDisplayed);
if (actionKey != KeyEvent.KEYCODE_UNKNOWN) {
request.putInt(DialogCursorProtocol.CLICK_SEND_ACTION_KEY, actionKey);
request.putString(DialogCursorProtocol.CLICK_SEND_ACTION_MSG, actionMsg);
}
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;
}
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
OpenResourceIdResult r =
mProviderContext.getContentResolver().getResourceId(uri);
try {
return r.r.getDrawable(r.id);
} 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) {
// 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;
}
}
}