94e678c188
This picker has no business granting any Uri permissions, so remove
any grant flags that malicious apps may have tried sneaking in.
Test: builds, boots
Bug: 32879772
Change-Id: I91c48c73287a271bd6c99e60e216dead22e68764
(cherry picked from commit 3f218e8431)
484 lines
18 KiB
Java
484 lines
18 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 com.android.settings;
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import android.graphics.ColorFilter;
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import android.util.DisplayMetrics;
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import com.android.internal.app.AlertActivity;
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import com.android.internal.app.AlertController;
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import android.app.Activity;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.Intent;
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import android.content.Intent.ShortcutIconResource;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.content.res.Resources;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.PaintFlagsDrawFilter;
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import android.graphics.PixelFormat;
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import android.graphics.Rect;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.graphics.drawable.PaintDrawable;
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import android.os.Bundle;
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import android.os.Parcelable;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.BaseAdapter;
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import android.widget.TextView;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* Displays a list of all activities matching the incoming
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* {@link Intent#EXTRA_INTENT} query, along with any injected items.
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*/
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public class ActivityPicker extends AlertActivity implements
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DialogInterface.OnClickListener, DialogInterface.OnCancelListener {
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/**
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* Adapter of items that are displayed in this dialog.
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*/
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private PickAdapter mAdapter;
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/**
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* Base {@link Intent} used when building list.
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*/
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private Intent mBaseIntent;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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final Intent intent = getIntent();
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// Read base intent from extras, otherwise assume default
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Parcelable parcel = intent.getParcelableExtra(Intent.EXTRA_INTENT);
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if (parcel instanceof Intent) {
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mBaseIntent = (Intent) parcel;
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mBaseIntent.setFlags(mBaseIntent.getFlags() & ~(Intent.FLAG_GRANT_READ_URI_PERMISSION
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| Intent.FLAG_GRANT_WRITE_URI_PERMISSION
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| Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION
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| Intent.FLAG_GRANT_PREFIX_URI_PERMISSION));
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} else {
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mBaseIntent = new Intent(Intent.ACTION_MAIN, null);
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mBaseIntent.addCategory(Intent.CATEGORY_DEFAULT);
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}
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// Create dialog parameters
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AlertController.AlertParams params = mAlertParams;
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params.mOnClickListener = this;
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params.mOnCancelListener = this;
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// Use custom title if provided, otherwise default window title
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if (intent.hasExtra(Intent.EXTRA_TITLE)) {
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params.mTitle = intent.getStringExtra(Intent.EXTRA_TITLE);
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} else {
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params.mTitle = getTitle();
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}
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// Build list adapter of pickable items
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List<PickAdapter.Item> items = getItems();
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mAdapter = new PickAdapter(this, items);
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params.mAdapter = mAdapter;
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setupAlert();
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}
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/**
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* Handle clicking of dialog item by passing back
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* {@link #getIntentForPosition(int)} in {@link #setResult(int, Intent)}.
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*/
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public void onClick(DialogInterface dialog, int which) {
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Intent intent = getIntentForPosition(which);
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setResult(Activity.RESULT_OK, intent);
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finish();
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}
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/**
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* Handle canceled dialog by passing back {@link Activity#RESULT_CANCELED}.
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*/
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public void onCancel(DialogInterface dialog) {
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setResult(Activity.RESULT_CANCELED);
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finish();
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}
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/**
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* Build the specific {@link Intent} for a given list position. Convenience
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* method that calls through to {@link PickAdapter.Item#getIntent(Intent)}.
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*/
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protected Intent getIntentForPosition(int position) {
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PickAdapter.Item item = (PickAdapter.Item) mAdapter.getItem(position);
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return item.getIntent(mBaseIntent);
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}
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/**
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* Build and return list of items to be shown in dialog. Default
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* implementation mixes activities matching {@link #mBaseIntent} from
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* {@link #putIntentItems(Intent, List)} with any injected items from
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* {@link Intent#EXTRA_SHORTCUT_NAME}. Override this method in subclasses to
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* change the items shown.
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*/
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protected List<PickAdapter.Item> getItems() {
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PackageManager packageManager = getPackageManager();
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List<PickAdapter.Item> items = new ArrayList<PickAdapter.Item>();
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// Add any injected pick items
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final Intent intent = getIntent();
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ArrayList<String> labels =
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intent.getStringArrayListExtra(Intent.EXTRA_SHORTCUT_NAME);
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ArrayList<ShortcutIconResource> icons =
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intent.getParcelableArrayListExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE);
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if (labels != null && icons != null && labels.size() == icons.size()) {
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for (int i = 0; i < labels.size(); i++) {
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String label = labels.get(i);
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Drawable icon = null;
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try {
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// Try loading icon from requested package
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ShortcutIconResource iconResource = icons.get(i);
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Resources res = packageManager.getResourcesForApplication(
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iconResource.packageName);
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icon = res.getDrawable(res.getIdentifier(
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iconResource.resourceName, null, null), null);
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} catch (NameNotFoundException e) {
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// Ignore
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}
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items.add(new PickAdapter.Item(this, label, icon));
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}
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}
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// Add any intent items if base was given
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if (mBaseIntent != null) {
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putIntentItems(mBaseIntent, items);
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}
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return items;
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}
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/**
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* Fill the given list with any activities matching the base {@link Intent}.
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*/
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protected void putIntentItems(Intent baseIntent, List<PickAdapter.Item> items) {
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PackageManager packageManager = getPackageManager();
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List<ResolveInfo> list = packageManager.queryIntentActivities(baseIntent,
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0 /* no flags */);
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Collections.sort(list, new ResolveInfo.DisplayNameComparator(packageManager));
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final int listSize = list.size();
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for (int i = 0; i < listSize; i++) {
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ResolveInfo resolveInfo = list.get(i);
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items.add(new PickAdapter.Item(this, packageManager, resolveInfo));
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}
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}
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/**
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* Adapter which shows the set of activities that can be performed for a
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* given {@link Intent}.
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*/
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protected static class PickAdapter extends BaseAdapter {
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/**
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* Item that appears in a {@link PickAdapter} list.
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*/
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public static class Item implements AppWidgetLoader.LabelledItem {
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protected static IconResizer sResizer;
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protected IconResizer getResizer(Context context) {
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if (sResizer == null) {
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final Resources resources = context.getResources();
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int size = (int) resources.getDimension(android.R.dimen.app_icon_size);
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sResizer = new IconResizer(size, size, resources.getDisplayMetrics());
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}
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return sResizer;
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}
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CharSequence label;
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Drawable icon;
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String packageName;
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String className;
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Bundle extras;
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/**
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* Create a list item from given label and icon.
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*/
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Item(Context context, CharSequence label, Drawable icon) {
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this.label = label;
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this.icon = getResizer(context).createIconThumbnail(icon);
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}
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/**
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* Create a list item and fill it with details from the given
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* {@link ResolveInfo} object.
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*/
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Item(Context context, PackageManager pm, ResolveInfo resolveInfo) {
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label = resolveInfo.loadLabel(pm);
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if (label == null && resolveInfo.activityInfo != null) {
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label = resolveInfo.activityInfo.name;
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}
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icon = getResizer(context).createIconThumbnail(resolveInfo.loadIcon(pm));
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packageName = resolveInfo.activityInfo.applicationInfo.packageName;
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className = resolveInfo.activityInfo.name;
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}
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/**
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* Build the {@link Intent} described by this item. If this item
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* can't create a valid {@link android.content.ComponentName}, it will return
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* {@link Intent#ACTION_CREATE_SHORTCUT} filled with the item label.
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*/
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Intent getIntent(Intent baseIntent) {
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Intent intent = new Intent(baseIntent);
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if (packageName != null && className != null) {
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// Valid package and class, so fill details as normal intent
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intent.setClassName(packageName, className);
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if (extras != null) {
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intent.putExtras(extras);
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}
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} else {
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// No valid package or class, so treat as shortcut with label
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intent.setAction(Intent.ACTION_CREATE_SHORTCUT);
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intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, label);
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}
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return intent;
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}
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public CharSequence getLabel() {
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return label;
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}
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}
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private final LayoutInflater mInflater;
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private final List<Item> mItems;
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/**
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* Create an adapter for the given items.
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*/
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public PickAdapter(Context context, List<Item> items) {
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mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
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mItems = items;
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}
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/**
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* {@inheritDoc}
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*/
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public int getCount() {
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return mItems.size();
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}
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/**
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* {@inheritDoc}
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*/
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public Object getItem(int position) {
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return mItems.get(position);
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}
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/**
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* {@inheritDoc}
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*/
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public long getItemId(int position) {
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return position;
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}
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/**
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* {@inheritDoc}
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*/
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public View getView(int position, View convertView, ViewGroup parent) {
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if (convertView == null) {
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convertView = mInflater.inflate(R.layout.pick_item, parent, false);
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}
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Item item = (Item) getItem(position);
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TextView textView = (TextView) convertView;
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textView.setText(item.label);
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textView.setCompoundDrawablesWithIntrinsicBounds(item.icon, null, null, null);
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return convertView;
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}
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}
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/**
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* Utility class to resize icons to match default icon size. Code is mostly
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* borrowed from Launcher.
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*/
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private static class IconResizer {
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private final int mIconWidth;
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private final int mIconHeight;
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private final DisplayMetrics mMetrics;
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private final Rect mOldBounds = new Rect();
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private final Canvas mCanvas = new Canvas();
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public IconResizer(int width, int height, DisplayMetrics metrics) {
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mCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,
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Paint.FILTER_BITMAP_FLAG));
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mMetrics = metrics;
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mIconWidth = width;
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mIconHeight = height;
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}
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/**
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* Returns a Drawable representing the thumbnail of the specified Drawable.
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* The size of the thumbnail is defined by the dimension
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* android.R.dimen.launcher_application_icon_size.
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*
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* This method is not thread-safe and should be invoked on the UI thread only.
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*
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* @param icon The icon to get a thumbnail of.
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*
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* @return A thumbnail for the specified icon or the icon itself if the
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* thumbnail could not be created.
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*/
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public Drawable createIconThumbnail(Drawable icon) {
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int width = mIconWidth;
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int height = mIconHeight;
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if (icon == null) {
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return new EmptyDrawable(width, height);
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}
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try {
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if (icon instanceof PaintDrawable) {
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PaintDrawable painter = (PaintDrawable) icon;
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painter.setIntrinsicWidth(width);
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painter.setIntrinsicHeight(height);
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} else if (icon instanceof BitmapDrawable) {
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// Ensure the bitmap has a density.
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BitmapDrawable bitmapDrawable = (BitmapDrawable) icon;
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Bitmap bitmap = bitmapDrawable.getBitmap();
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if (bitmap.getDensity() == Bitmap.DENSITY_NONE) {
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bitmapDrawable.setTargetDensity(mMetrics);
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}
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}
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int iconWidth = icon.getIntrinsicWidth();
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int iconHeight = icon.getIntrinsicHeight();
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if (iconWidth > 0 && iconHeight > 0) {
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if (width < iconWidth || height < iconHeight) {
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final float ratio = (float) iconWidth / iconHeight;
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if (iconWidth > iconHeight) {
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height = (int) (width / ratio);
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} else if (iconHeight > iconWidth) {
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width = (int) (height * ratio);
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}
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final Bitmap.Config c = icon.getOpacity() != PixelFormat.OPAQUE ?
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Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
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final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
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final Canvas canvas = mCanvas;
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canvas.setBitmap(thumb);
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// Copy the old bounds to restore them later
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// If we were to do oldBounds = icon.getBounds(),
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// the call to setBounds() that follows would
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// change the same instance and we would lose the
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// old bounds
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mOldBounds.set(icon.getBounds());
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final int x = (mIconWidth - width) / 2;
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final int y = (mIconHeight - height) / 2;
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icon.setBounds(x, y, x + width, y + height);
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icon.draw(canvas);
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icon.setBounds(mOldBounds);
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//noinspection deprecation
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icon = new BitmapDrawable(thumb);
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((BitmapDrawable) icon).setTargetDensity(mMetrics);
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canvas.setBitmap(null);
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} else if (iconWidth < width && iconHeight < height) {
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final Bitmap.Config c = Bitmap.Config.ARGB_8888;
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final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
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final Canvas canvas = mCanvas;
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canvas.setBitmap(thumb);
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mOldBounds.set(icon.getBounds());
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final int x = (width - iconWidth) / 2;
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final int y = (height - iconHeight) / 2;
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icon.setBounds(x, y, x + iconWidth, y + iconHeight);
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icon.draw(canvas);
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icon.setBounds(mOldBounds);
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//noinspection deprecation
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icon = new BitmapDrawable(thumb);
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((BitmapDrawable) icon).setTargetDensity(mMetrics);
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canvas.setBitmap(null);
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}
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}
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} catch (Throwable t) {
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icon = new EmptyDrawable(width, height);
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}
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return icon;
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}
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}
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private static class EmptyDrawable extends Drawable {
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private final int mWidth;
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private final int mHeight;
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EmptyDrawable(int width, int height) {
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mWidth = width;
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mHeight = height;
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}
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@Override
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public int getIntrinsicWidth() {
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return mWidth;
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}
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@Override
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public int getIntrinsicHeight() {
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return mHeight;
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}
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@Override
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public int getMinimumWidth() {
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return mWidth;
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}
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@Override
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public int getMinimumHeight() {
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return mHeight;
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}
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@Override
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public void draw(Canvas canvas) {
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}
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@Override
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public void setAlpha(int alpha) {
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}
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@Override
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public void setColorFilter(ColorFilter cf) {
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}
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@Override
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public int getOpacity() {
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return PixelFormat.TRANSLUCENT;
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}
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}
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}
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