707 lines
26 KiB
Java
707 lines
26 KiB
Java
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.app;
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import com.android.internal.R;
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import android.content.ComponentName;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.ContentResolver.OpenResourceIdResult;
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import android.content.pm.ActivityInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.content.res.ColorStateList;
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import android.content.res.Resources;
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import android.database.Cursor;
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import android.graphics.drawable.ColorDrawable;
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import android.graphics.drawable.Drawable;
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import android.graphics.drawable.StateListDrawable;
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import android.net.Uri;
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import android.os.Bundle;
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import android.text.Spannable;
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import android.text.SpannableString;
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import android.text.TextUtils;
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import android.text.style.TextAppearanceSpan;
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import android.util.Log;
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import android.util.SparseArray;
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import android.util.TypedValue;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.Filter;
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import android.widget.ImageView;
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import android.widget.ResourceCursorAdapter;
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import android.widget.TextView;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.WeakHashMap;
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/**
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* Provides the contents for the suggestion drop-down list.in {@link SearchDialog}.
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*
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* @hide
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*/
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class SuggestionsAdapter extends ResourceCursorAdapter {
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private static final boolean DBG = false;
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private static final String LOG_TAG = "SuggestionsAdapter";
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private static final int QUERY_LIMIT = 50;
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private SearchManager mSearchManager;
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private SearchDialog mSearchDialog;
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private SearchableInfo mSearchable;
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private Context mProviderContext;
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private WeakHashMap<String, Drawable.ConstantState> mOutsideDrawablesCache;
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private SparseArray<Drawable.ConstantState> mBackgroundsCache;
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private boolean mClosed = false;
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// URL color
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private ColorStateList mUrlColor;
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// Cached column indexes, updated when the cursor changes.
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private int mText1Col;
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private int mText2Col;
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private int mText2UrlCol;
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private int mIconName1Col;
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private int mIconName2Col;
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private int mBackgroundColorCol;
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static final int NONE = -1;
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private final Runnable mStartSpinnerRunnable;
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private final Runnable mStopSpinnerRunnable;
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/**
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* The amount of time we delay in the filter when the user presses the delete key.
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* @see Filter#setDelayer(android.widget.Filter.Delayer).
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*/
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private static final long DELETE_KEY_POST_DELAY = 500L;
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public SuggestionsAdapter(Context context, SearchDialog searchDialog,
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SearchableInfo searchable,
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WeakHashMap<String, Drawable.ConstantState> outsideDrawablesCache) {
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super(context,
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com.android.internal.R.layout.search_dropdown_item_icons_2line,
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null, // no initial cursor
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true); // auto-requery
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mSearchManager = (SearchManager) mContext.getSystemService(Context.SEARCH_SERVICE);
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mSearchDialog = searchDialog;
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mSearchable = searchable;
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// set up provider resources (gives us icons, etc.)
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Context activityContext = mSearchable.getActivityContext(mContext);
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mProviderContext = mSearchable.getProviderContext(mContext, activityContext);
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mOutsideDrawablesCache = outsideDrawablesCache;
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mBackgroundsCache = new SparseArray<Drawable.ConstantState>();
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mStartSpinnerRunnable = new Runnable() {
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public void run() {
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mSearchDialog.setWorking(true);
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}
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};
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mStopSpinnerRunnable = new Runnable() {
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public void run() {
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mSearchDialog.setWorking(false);
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}
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};
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// delay 500ms when deleting
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getFilter().setDelayer(new Filter.Delayer() {
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private int mPreviousLength = 0;
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public long getPostingDelay(CharSequence constraint) {
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if (constraint == null) return 0;
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long delay = constraint.length() < mPreviousLength ? DELETE_KEY_POST_DELAY : 0;
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mPreviousLength = constraint.length();
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return delay;
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}
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});
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}
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/**
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* Overridden to always return <code>false</code>, since we cannot be sure that
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* suggestion sources return stable IDs.
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*/
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@Override
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public boolean hasStableIds() {
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return false;
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}
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/**
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* Use the search suggestions provider to obtain a live cursor. This will be called
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* in a worker thread, so it's OK if the query is slow (e.g. round trip for suggestions).
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* The results will be processed in the UI thread and changeCursor() will be called.
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*/
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@Override
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public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
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if (DBG) Log.d(LOG_TAG, "runQueryOnBackgroundThread(" + constraint + ")");
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String query = (constraint == null) ? "" : constraint.toString();
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/**
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* for in app search we show the progress spinner until the cursor is returned with
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* the results.
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*/
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Cursor cursor = null;
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mSearchDialog.getWindow().getDecorView().post(mStartSpinnerRunnable);
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try {
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cursor = mSearchManager.getSuggestions(mSearchable, query, QUERY_LIMIT);
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// trigger fill window so the spinner stays up until the results are copied over and
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// closer to being ready
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if (cursor != null) {
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cursor.getCount();
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return cursor;
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}
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} catch (RuntimeException e) {
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Log.w(LOG_TAG, "Search suggestions query threw an exception.", e);
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}
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// If cursor is null or an exception was thrown, stop the spinner and return null.
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// changeCursor doesn't get called if cursor is null
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mSearchDialog.getWindow().getDecorView().post(mStopSpinnerRunnable);
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return null;
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}
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public void close() {
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if (DBG) Log.d(LOG_TAG, "close()");
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changeCursor(null);
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mClosed = true;
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}
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@Override
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public void notifyDataSetChanged() {
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if (DBG) Log.d(LOG_TAG, "notifyDataSetChanged");
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super.notifyDataSetChanged();
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mSearchDialog.onDataSetChanged();
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updateSpinnerState(getCursor());
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}
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@Override
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public void notifyDataSetInvalidated() {
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if (DBG) Log.d(LOG_TAG, "notifyDataSetInvalidated");
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super.notifyDataSetInvalidated();
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updateSpinnerState(getCursor());
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}
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private void updateSpinnerState(Cursor cursor) {
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Bundle extras = cursor != null ? cursor.getExtras() : null;
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if (DBG) {
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Log.d(LOG_TAG, "updateSpinnerState - extra = "
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+ (extras != null
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? extras.getBoolean(SearchManager.CURSOR_EXTRA_KEY_IN_PROGRESS)
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: null));
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}
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// Check if the Cursor indicates that the query is not complete and show the spinner
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if (extras != null
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&& extras.getBoolean(SearchManager.CURSOR_EXTRA_KEY_IN_PROGRESS)) {
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mSearchDialog.getWindow().getDecorView().post(mStartSpinnerRunnable);
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return;
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}
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// If cursor is null or is done, stop the spinner
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mSearchDialog.getWindow().getDecorView().post(mStopSpinnerRunnable);
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}
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/**
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* Cache columns.
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*/
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@Override
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public void changeCursor(Cursor c) {
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if (DBG) Log.d(LOG_TAG, "changeCursor(" + c + ")");
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if (mClosed) {
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Log.w(LOG_TAG, "Tried to change cursor after adapter was closed.");
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if (c != null) c.close();
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return;
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}
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try {
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super.changeCursor(c);
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if (c != null) {
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mText1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1);
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mText2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2);
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mText2UrlCol = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2_URL);
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mIconName1Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_1);
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mIconName2Col = c.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_2);
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mBackgroundColorCol =
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c.getColumnIndex(SearchManager.SUGGEST_COLUMN_BACKGROUND_COLOR);
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}
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} catch (Exception e) {
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Log.e(LOG_TAG, "error changing cursor and caching columns", e);
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}
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}
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/**
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* Tags the view with cached child view look-ups.
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*/
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@Override
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public View newView(Context context, Cursor cursor, ViewGroup parent) {
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View v = super.newView(context, cursor, parent);
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v.setTag(new ChildViewCache(v));
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return v;
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}
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/**
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* Cache of the child views of drop-drown list items, to avoid looking up the children
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* each time the contents of a list item are changed.
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*/
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private final static class ChildViewCache {
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public final TextView mText1;
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public final TextView mText2;
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public final ImageView mIcon1;
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public final ImageView mIcon2;
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public ChildViewCache(View v) {
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mText1 = (TextView) v.findViewById(com.android.internal.R.id.text1);
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mText2 = (TextView) v.findViewById(com.android.internal.R.id.text2);
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mIcon1 = (ImageView) v.findViewById(com.android.internal.R.id.icon1);
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mIcon2 = (ImageView) v.findViewById(com.android.internal.R.id.icon2);
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}
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}
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@Override
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public void bindView(View view, Context context, Cursor cursor) {
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ChildViewCache views = (ChildViewCache) view.getTag();
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int backgroundColor = 0;
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if (mBackgroundColorCol != -1) {
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backgroundColor = cursor.getInt(mBackgroundColorCol);
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}
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Drawable background = getItemBackground(backgroundColor);
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view.setBackgroundDrawable(background);
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if (views.mText1 != null) {
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String text1 = getStringOrNull(cursor, mText1Col);
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setViewText(views.mText1, text1);
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}
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if (views.mText2 != null) {
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// First check TEXT_2_URL
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CharSequence text2 = getStringOrNull(cursor, mText2UrlCol);
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if (text2 != null) {
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text2 = formatUrl(text2);
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} else {
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text2 = getStringOrNull(cursor, mText2Col);
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}
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// If no second line of text is indicated, allow the first line of text
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// to be up to two lines if it wants to be.
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if (TextUtils.isEmpty(text2)) {
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if (views.mText1 != null) {
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views.mText1.setSingleLine(false);
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views.mText1.setMaxLines(2);
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}
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} else {
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if (views.mText1 != null) {
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views.mText1.setSingleLine(true);
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views.mText1.setMaxLines(1);
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}
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}
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setViewText(views.mText2, text2);
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}
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if (views.mIcon1 != null) {
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setViewDrawable(views.mIcon1, getIcon1(cursor));
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}
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if (views.mIcon2 != null) {
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setViewDrawable(views.mIcon2, getIcon2(cursor));
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}
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}
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private CharSequence formatUrl(CharSequence url) {
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if (mUrlColor == null) {
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// Lazily get the URL color from the current theme.
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TypedValue colorValue = new TypedValue();
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mContext.getTheme().resolveAttribute(R.attr.textColorSearchUrl, colorValue, true);
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mUrlColor = mContext.getResources().getColorStateList(colorValue.resourceId);
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}
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SpannableString text = new SpannableString(url);
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text.setSpan(new TextAppearanceSpan(null, 0, 0, mUrlColor, null),
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0, url.length(),
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Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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return text;
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}
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/**
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* Gets a drawable with no color when selected or pressed, and the given color when
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* neither selected nor pressed.
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*
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* @return A drawable, or {@code null} if the given color is transparent.
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*/
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private Drawable getItemBackground(int backgroundColor) {
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if (backgroundColor == 0) {
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return null;
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} else {
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Drawable.ConstantState cachedBg = mBackgroundsCache.get(backgroundColor);
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if (cachedBg != null) {
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if (DBG) Log.d(LOG_TAG, "Background cache hit for color " + backgroundColor);
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return cachedBg.newDrawable(mProviderContext.getResources());
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}
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if (DBG) Log.d(LOG_TAG, "Creating new background for color " + backgroundColor);
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ColorDrawable transparent = new ColorDrawable(0);
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ColorDrawable background = new ColorDrawable(backgroundColor);
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StateListDrawable newBg = new StateListDrawable();
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newBg.addState(new int[]{android.R.attr.state_selected}, transparent);
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newBg.addState(new int[]{android.R.attr.state_pressed}, transparent);
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newBg.addState(new int[]{}, background);
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mBackgroundsCache.put(backgroundColor, newBg.getConstantState());
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return newBg;
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}
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}
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private void setViewText(TextView v, CharSequence text) {
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// Set the text even if it's null, since we need to clear any previous text.
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v.setText(text);
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if (TextUtils.isEmpty(text)) {
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v.setVisibility(View.GONE);
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} else {
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v.setVisibility(View.VISIBLE);
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}
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}
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private Drawable getIcon1(Cursor cursor) {
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if (mIconName1Col < 0) {
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return null;
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}
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String value = cursor.getString(mIconName1Col);
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Drawable drawable = getDrawableFromResourceValue(value);
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if (drawable != null) {
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return drawable;
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}
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return getDefaultIcon1(cursor);
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}
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private Drawable getIcon2(Cursor cursor) {
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if (mIconName2Col < 0) {
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return null;
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}
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String value = cursor.getString(mIconName2Col);
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return getDrawableFromResourceValue(value);
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}
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/**
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* Sets the drawable in an image view, makes sure the view is only visible if there
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* is a drawable.
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*/
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private void setViewDrawable(ImageView v, Drawable drawable) {
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// Set the icon even if the drawable is null, since we need to clear any
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// previous icon.
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v.setImageDrawable(drawable);
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if (drawable == null) {
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v.setVisibility(View.GONE);
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} else {
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v.setVisibility(View.VISIBLE);
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// This is a hack to get any animated drawables (like a 'working' spinner)
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// to animate. You have to setVisible true on an AnimationDrawable to get
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// it to start animating, but it must first have been false or else the
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// call to setVisible will be ineffective. We need to clear up the story
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// about animated drawables in the future, see http://b/1878430.
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drawable.setVisible(false, false);
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drawable.setVisible(true, false);
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}
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}
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/**
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* Gets the text to show in the query field when a suggestion is selected.
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*
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* @param cursor The Cursor to read the suggestion data from. The Cursor should already
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* be moved to the suggestion that is to be read from.
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* @return The text to show, or <code>null</code> if the query should not be
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* changed when selecting this suggestion.
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*/
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@Override
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public CharSequence convertToString(Cursor cursor) {
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if (cursor == null) {
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return null;
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}
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String query = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_QUERY);
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if (query != null) {
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return query;
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}
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if (mSearchable.shouldRewriteQueryFromData()) {
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String data = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_INTENT_DATA);
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if (data != null) {
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return data;
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}
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}
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if (mSearchable.shouldRewriteQueryFromText()) {
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String text1 = getColumnString(cursor, SearchManager.SUGGEST_COLUMN_TEXT_1);
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if (text1 != null) {
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return text1;
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}
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}
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return null;
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}
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/**
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* This method is overridden purely to provide a bit of protection against
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* flaky content providers.
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*
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* @see android.widget.ListAdapter#getView(int, View, ViewGroup)
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*/
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@Override
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public View getView(int position, View convertView, ViewGroup parent) {
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try {
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return super.getView(position, convertView, parent);
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} catch (RuntimeException e) {
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Log.w(LOG_TAG, "Search suggestions cursor threw exception.", e);
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// Put exception string in item title
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View v = newView(mContext, mCursor, parent);
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if (v != null) {
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ChildViewCache views = (ChildViewCache) v.getTag();
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TextView tv = views.mText1;
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tv.setText(e.toString());
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}
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return v;
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}
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}
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/**
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* Gets a drawable given a value provided by a suggestion provider.
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*
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* This value could be just the string value of a resource id
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* (e.g., "2130837524"), in which case we will try to retrieve a drawable from
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* the provider's resources. If the value is not an integer, it is
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* treated as a Uri and opened with
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* {@link ContentResolver#openOutputStream(android.net.Uri, String)}.
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*
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* All resources and URIs are read using the suggestion provider's context.
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*
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* If the string is not formatted as expected, or no drawable can be found for
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* the provided value, this method returns null.
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*
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* @param drawableId a string like "2130837524",
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* "android.resource://com.android.alarmclock/2130837524",
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* or "content://contacts/photos/253".
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* @return a Drawable, or null if none found
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*/
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private Drawable getDrawableFromResourceValue(String drawableId) {
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if (drawableId == null || drawableId.length() == 0 || "0".equals(drawableId)) {
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return null;
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}
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try {
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// First, see if it's just an integer
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int resourceId = Integer.parseInt(drawableId);
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// It's an int, look for it in the cache
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|
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);
|
|
return getStringOrNull(cursor, col);
|
|
}
|
|
|
|
private static String getStringOrNull(Cursor cursor, int col) {
|
|
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;
|
|
}
|
|
}
|
|
}
|