a034fa5407
Refactor content monitoring code into a few singletons to keep alive
while Settings app is running.
Bug: 32995210
Test: Manually installing/uninstalling AOSP LatinIME.apk while
Settings app is/isn't running, then search AOSP.
Test: Connecting/Disconnecting Anker bluetooth keyboard while Settings
app is/isn't running, then search Anker.
Test: Added Robolectric test for DynamicIndexableContentMonitor.
Change-Id: I588e33be169fc9677d41c3daa59ab400f04f6419
473 lines
18 KiB
Java
473 lines
18 KiB
Java
/*
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* Copyright (C) 2014 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.search;
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import android.accessibilityservice.AccessibilityService;
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import android.accessibilityservice.AccessibilityServiceInfo;
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import android.app.Activity;
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import android.app.LoaderManager;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.Loader;
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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.ServiceInfo;
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import android.database.ContentObserver;
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import android.hardware.input.InputManager;
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import android.net.Uri;
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import android.os.Bundle;
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import android.os.UserHandle;
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import android.os.UserManager;
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import android.print.PrintManager;
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import android.print.PrintServicesLoader;
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import android.printservice.PrintServiceInfo;
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import android.provider.UserDictionary;
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import android.support.annotation.Nullable;
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import android.support.annotation.VisibleForTesting;
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import android.util.Log;
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import android.view.accessibility.AccessibilityManager;
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import android.view.inputmethod.InputMethod;
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import android.view.inputmethod.InputMethodInfo;
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import android.view.inputmethod.InputMethodManager;
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import com.android.internal.content.PackageMonitor;
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import com.android.settings.accessibility.AccessibilitySettings;
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import com.android.settings.inputmethod.InputMethodAndLanguageSettings;
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import com.android.settings.print.PrintSettingsFragment;
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import java.util.ArrayList;
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import java.util.List;
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public final class DynamicIndexableContentMonitor implements
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LoaderManager.LoaderCallbacks<List<PrintServiceInfo>> {
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// Shorten the class name because log TAG can be at most 23 chars.
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private static final String TAG = "DynamicContentMonitor";
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@VisibleForTesting
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static final long DELAY_PROCESS_PACKAGE_CHANGE = 2000;
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// Null if not initialized.
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@Nullable private Index mIndex;
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private Context mContext;
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private boolean mHasFeaturePrinting;
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@VisibleForTesting
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static Intent getAccessibilityServiceIntent(String packageName) {
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final Intent intent = new Intent(AccessibilityService.SERVICE_INTERFACE);
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intent.setPackage(packageName);
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return intent;
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}
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@VisibleForTesting
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static Intent getIMEServiceIntent(String packageName) {
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final Intent intent = new Intent(InputMethod.SERVICE_INTERFACE);
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intent.setPackage(packageName);
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return intent;
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}
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@VisibleForTesting
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static void resetForTesting() {
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InputDevicesMonitor.getInstance().resetForTesting();
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PackageChangeMonitor.getInstance().resetForTesting();
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}
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/**
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* This instance holds a set of content monitor singleton objects.
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*
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* This object is created every time a sub-settings that extends {@code SettingsActivity}
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* is created.
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*/
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public DynamicIndexableContentMonitor() {}
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/**
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* Creates and initializes a set of content monitor singleton objects if not yet exist.
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* Also starts loading the list of print services.
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* <code>mIndex</code> has non-null value after successfully initialized.
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*
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* @param activity used to get {@link LoaderManager}.
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* @param loaderId id for loading print services.
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*/
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public void register(Activity activity, int loaderId) {
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final boolean isUserUnlocked = activity
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.getSystemService(UserManager.class)
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.isUserUnlocked();
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register(activity, loaderId, Index.getInstance(activity), isUserUnlocked);
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}
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/**
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* For testing to inject {@link Index} object. Also because currently Robolectric doesn't
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* support API 24, we can not test code that calls {@link UserManager#isUserUnlocked()}.
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*/
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@VisibleForTesting
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void register(Activity activity, int loaderId, Index index, boolean isUserUnlocked) {
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if (!isUserUnlocked) {
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Log.w(TAG, "Skipping content monitoring because user is locked");
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return;
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}
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mContext = activity;
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mIndex = index;
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mHasFeaturePrinting = mContext.getPackageManager()
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.hasSystemFeature(PackageManager.FEATURE_PRINTING);
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if (mHasFeaturePrinting) {
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activity.getLoaderManager().initLoader(loaderId, null /* args */, this /* callbacks */);
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}
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// Watch for input device changes.
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InputDevicesMonitor.getInstance().initialize(mContext, mIndex);
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// Start tracking packages.
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PackageChangeMonitor.getInstance().initialize(mContext, mIndex);
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}
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/**
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* Aborts loading the list of print services.
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* Note that a set of content monitor singletons keep alive while Settings app is running.
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*
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* @param activity user to get {@link LoaderManager}.
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* @param loaderId id for loading print services.
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*/
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public void unregister(Activity activity, int loaderId) {
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if (mIndex == null) return;
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if (mHasFeaturePrinting) {
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activity.getLoaderManager().destroyLoader(loaderId);
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}
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}
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@Override
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public Loader<List<PrintServiceInfo>> onCreateLoader(int id, Bundle args) {
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return new PrintServicesLoader(
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(PrintManager) mContext.getSystemService(Context.PRINT_SERVICE), mContext,
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PrintManager.ALL_SERVICES);
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}
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@Override
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public void onLoadFinished(Loader<List<PrintServiceInfo>> loader,
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List<PrintServiceInfo> services) {
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mIndex.updateFromClassNameResource(PrintSettingsFragment.class.getName(),
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false /* rebuild */, true /* includeInSearchResult */);
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}
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@Override
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public void onLoaderReset(Loader<List<PrintServiceInfo>> loader) {
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// nothing to do
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}
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// A singleton that monitors input devices changes and updates indexes of physical keyboards.
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private static class InputDevicesMonitor implements InputManager.InputDeviceListener {
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// Null if not initialized.
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@Nullable private Index mIndex;
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private InputManager mInputManager;
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private InputDevicesMonitor() {}
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private static class SingletonHolder {
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private static final InputDevicesMonitor INSTANCE = new InputDevicesMonitor();
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}
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static InputDevicesMonitor getInstance() {
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return SingletonHolder.INSTANCE;
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}
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@VisibleForTesting
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synchronized void resetForTesting() {
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if (mIndex != null) {
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mInputManager.unregisterInputDeviceListener(this /* listener */);
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}
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mIndex = null;
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}
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synchronized void initialize(Context context, Index index) {
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if (mIndex != null) return;
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mIndex = index;
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mInputManager = (InputManager) context.getSystemService(Context.INPUT_SERVICE);
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buildIndex(true /* rebuild */);
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// Watch for input device changes.
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mInputManager.registerInputDeviceListener(this /* listener */, null /* handler */);
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}
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private void buildIndex(boolean rebuild) {
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// TODO: Fix landing page to PhysicalKeyboardFragment.
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mIndex.updateFromClassNameResource(InputMethodAndLanguageSettings.class.getName(),
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rebuild, true /* includeInSearchResult */);
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}
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@Override
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public void onInputDeviceAdded(int deviceId) {
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buildIndex(false /* rebuild */);
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}
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@Override
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public void onInputDeviceRemoved(int deviceId) {
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buildIndex(true /* rebuild */);
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}
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@Override
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public void onInputDeviceChanged(int deviceId) {
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buildIndex(true /* rebuild */);
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}
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}
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// A singleton that monitors package installing, uninstalling, enabling, and disabling.
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// Then updates indexes of accessibility services and input methods.
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private static class PackageChangeMonitor extends PackageMonitor {
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private static final String TAG = PackageChangeMonitor.class.getSimpleName();
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// Null if not initialized.
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@Nullable private PackageManager mPackageManager;
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private PackageChangeMonitor() {}
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private static class SingletonHolder {
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private static final PackageChangeMonitor INSTANCE = new PackageChangeMonitor();
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}
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static PackageChangeMonitor getInstance() {
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return SingletonHolder.INSTANCE;
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}
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@VisibleForTesting
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synchronized void resetForTesting() {
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if (mPackageManager != null) {
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unregister();
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}
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mPackageManager = null;
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AccessibilityServicesMonitor.getInstance().resetForTesting();
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InputMethodServicesMonitor.getInstance().resetForTesting();
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}
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synchronized void initialize(Context context, Index index) {
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if (mPackageManager != null) return;;
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mPackageManager = context.getPackageManager();
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AccessibilityServicesMonitor.getInstance().initialize(context, index);
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InputMethodServicesMonitor.getInstance().initialize(context, index);
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// Start tracking packages. Use background thread for monitoring. Note that no need to
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// unregister this monitor. This should be alive while Settings app is running.
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register(context, null /* thread */, UserHandle.CURRENT, false);
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}
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// Covers installed, appeared external storage with the package, upgraded.
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@Override
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public void onPackageAppeared(String packageName, int uid) {
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postPackageAvailable(packageName);
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}
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// Covers uninstalled, removed external storage with the package.
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@Override
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public void onPackageDisappeared(String packageName, int uid) {
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postPackageUnavailable(packageName);
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}
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// Covers enabled, disabled.
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@Override
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public void onPackageModified(String packageName) {
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try {
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final int state = mPackageManager.getApplicationEnabledSetting(packageName);
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if (state == PackageManager.COMPONENT_ENABLED_STATE_DEFAULT
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|| state == PackageManager.COMPONENT_ENABLED_STATE_ENABLED) {
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postPackageAvailable(packageName);
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} else {
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postPackageUnavailable(packageName);
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}
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} catch (IllegalArgumentException e) {
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Log.e(TAG, "Package does not exist: " + packageName, e);
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}
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}
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private void postPackageAvailable(final String packageName) {
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getRegisteredHandler().postDelayed(() -> {
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AccessibilityServicesMonitor.getInstance().onPackageAvailable(packageName);
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InputMethodServicesMonitor.getInstance().onPackageAvailable(packageName);
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}, DELAY_PROCESS_PACKAGE_CHANGE);
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}
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private void postPackageUnavailable(final String packageName) {
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getRegisteredHandler().postDelayed(() -> {
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AccessibilityServicesMonitor.getInstance().onPackageUnavailable(packageName);
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InputMethodServicesMonitor.getInstance().onPackageUnavailable(packageName);
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}, DELAY_PROCESS_PACKAGE_CHANGE);
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}
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}
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// A singleton that holds list of available accessibility services and updates search index.
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private static class AccessibilityServicesMonitor {
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// Null if not initialized.
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@Nullable private Index mIndex;
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private PackageManager mPackageManager;
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private final List<String> mAccessibilityServices = new ArrayList<>();
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private AccessibilityServicesMonitor() {}
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private static class SingletonHolder {
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private static final AccessibilityServicesMonitor INSTANCE =
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new AccessibilityServicesMonitor();
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}
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static AccessibilityServicesMonitor getInstance() {
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return SingletonHolder.INSTANCE;
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}
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@VisibleForTesting
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synchronized void resetForTesting() {
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mIndex = null;
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}
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synchronized void initialize(Context context, Index index) {
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if (mIndex != null) return;
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mIndex = index;
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mPackageManager = context.getPackageManager();
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mAccessibilityServices.clear();
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buildIndex(true /* rebuild */);
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// Cache accessibility service packages to know when they go away.
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AccessibilityManager accessibilityManager = (AccessibilityManager) context
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.getSystemService(Context.ACCESSIBILITY_SERVICE);
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for (final AccessibilityServiceInfo accessibilityService
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: accessibilityManager.getInstalledAccessibilityServiceList()) {
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ResolveInfo resolveInfo = accessibilityService.getResolveInfo();
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if (resolveInfo != null && resolveInfo.serviceInfo != null) {
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mAccessibilityServices.add(resolveInfo.serviceInfo.packageName);
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}
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}
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}
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private void buildIndex(boolean rebuild) {
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mIndex.updateFromClassNameResource(AccessibilitySettings.class.getName(),
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rebuild, true /* includeInSearchResult */);
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}
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synchronized void onPackageAvailable(String packageName) {
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if (mIndex == null) return;
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if (mAccessibilityServices.contains(packageName)) return;
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final Intent intent = getAccessibilityServiceIntent(packageName);
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final List<ResolveInfo> services = mPackageManager
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.queryIntentServices(intent, 0 /* flags */);
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if (services == null || services.isEmpty()) return;
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mAccessibilityServices.add(packageName);
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buildIndex(false /* rebuild */);
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}
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synchronized void onPackageUnavailable(String packageName) {
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if (mIndex == null) return;
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if (!mAccessibilityServices.remove(packageName)) return;
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buildIndex(true /* rebuild */);
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}
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}
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// A singleton that holds list of available input methods and updates search index.
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// Also it monitors user dictionary changes and updates search index.
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private static class InputMethodServicesMonitor extends ContentObserver {
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// Null if not initialized.
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@Nullable private Index mIndex;
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private PackageManager mPackageManager;
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private ContentResolver mContentResolver;
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private final List<String> mInputMethodServices = new ArrayList<>();
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private InputMethodServicesMonitor() {
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// No need for handler because {@link #onChange(boolean,Uri)} is short and quick.
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super(null /* handler */);
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}
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private static class SingletonHolder {
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private static final InputMethodServicesMonitor INSTANCE =
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new InputMethodServicesMonitor();
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}
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static InputMethodServicesMonitor getInstance() {
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return SingletonHolder.INSTANCE;
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}
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@VisibleForTesting
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synchronized void resetForTesting() {
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if (mIndex != null) {
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mContentResolver.unregisterContentObserver(this /* observer */);
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}
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mIndex = null;
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}
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synchronized void initialize(Context context, Index index) {
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final boolean hasFeatureIme = context.getPackageManager()
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.hasSystemFeature(PackageManager.FEATURE_INPUT_METHODS);
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if (!hasFeatureIme) return;
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if (mIndex != null) return;
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mIndex = index;
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mPackageManager = context.getPackageManager();
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mContentResolver = context.getContentResolver();
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mInputMethodServices.clear();
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buildIndex(InputMethodAndLanguageSettings.class, true /* rebuild */);
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// Cache IME service packages to know when they go away.
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final InputMethodManager inputMethodManager = (InputMethodManager) context
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.getSystemService(Context.INPUT_METHOD_SERVICE);
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for (final InputMethodInfo inputMethod : inputMethodManager.getInputMethodList()) {
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ServiceInfo serviceInfo = inputMethod.getServiceInfo();
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if (serviceInfo != null) {
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mInputMethodServices.add(serviceInfo.packageName);
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}
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}
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// Watch for related content URIs.
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mContentResolver.registerContentObserver(UserDictionary.Words.CONTENT_URI,
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true /* notifyForDescendants */, this /* observer */);
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// TODO: Should monitor android.provider.Settings.Secure.ENABLED_INPUT_METHODS and
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// update index of AvailableVirtualKeyboardFragment and VirtualKeyboardFragment.
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}
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private void buildIndex(Class<?> indexClass, boolean rebuild) {
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mIndex.updateFromClassNameResource(indexClass.getName(), rebuild,
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true /* includeInSearchResult */);
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}
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synchronized void onPackageAvailable(String packageName) {
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if (mIndex == null) return;
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if (mInputMethodServices.contains(packageName)) return;
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final Intent intent = getIMEServiceIntent(packageName);
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final List<ResolveInfo> services = mPackageManager
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.queryIntentServices(intent, 0 /* flags */);
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if (services == null || services.isEmpty()) return;
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mInputMethodServices.add(packageName);
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// TODO: Fix landing page to VirtualKeyboardFragment.
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buildIndex(InputMethodAndLanguageSettings.class, false /* rebuild */);
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}
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synchronized void onPackageUnavailable(String packageName) {
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if (mIndex == null) return;
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if (!mInputMethodServices.remove(packageName)) return;
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// TODO: Fix landing page to AvailableVirtualKeyboardFragment.
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buildIndex(InputMethodAndLanguageSettings.class, true /* rebuild */);
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}
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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if (UserDictionary.Words.CONTENT_URI.equals(uri)) {
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buildIndex(InputMethodAndLanguageSettings.class, true /* rebuild */);
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}
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}
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}
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}
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