bf1fa0c2a6
Doesn't unregister contentprovider so that when data changed,
the fragment is destroyed.
Fixes: 127726564
Test: Connect to wifi. Go to Settings -> connected devices ->
connection preference -> printing -> hp print service -> press
back. Repeat several times.
Change-Id: I79d1522ce9d91a6bf6b1f982b7687eab1f7896bb
736 lines
26 KiB
Java
736 lines
26 KiB
Java
/*
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* Copyright (C) 2013 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.print;
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import android.app.Activity;
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import android.app.settings.SettingsEnums;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentSender.SendIntentException;
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import android.content.pm.ResolveInfo;
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import android.graphics.drawable.Drawable;
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import android.os.Bundle;
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import android.print.PrintManager;
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import android.print.PrinterDiscoverySession;
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import android.print.PrinterDiscoverySession.OnPrintersChangeListener;
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import android.print.PrinterId;
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import android.print.PrinterInfo;
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import android.printservice.PrintServiceInfo;
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import android.text.TextUtils;
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import android.util.Log;
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import android.util.TypedValue;
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import android.view.LayoutInflater;
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import android.view.Menu;
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import android.view.MenuInflater;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.ViewGroup;
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import android.view.accessibility.AccessibilityManager;
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import android.widget.Filter;
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import android.widget.Filterable;
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import android.widget.ImageView;
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import android.widget.LinearLayout;
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import android.widget.SearchView;
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import android.widget.Switch;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.loader.app.LoaderManager;
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import androidx.loader.content.Loader;
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import androidx.recyclerview.widget.RecyclerView;
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import androidx.recyclerview.widget.RecyclerView.AdapterDataObserver;
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import com.android.settings.R;
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import com.android.settings.SettingsActivity;
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import com.android.settings.SettingsPreferenceFragment;
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import com.android.settings.widget.SwitchBar;
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import com.android.settings.widget.ToggleSwitch;
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import java.util.ArrayList;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* Fragment with print service settings.
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*/
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public class PrintServiceSettingsFragment extends SettingsPreferenceFragment
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implements SwitchBar.OnSwitchChangeListener,
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LoaderManager.LoaderCallbacks<List<PrintServiceInfo>> {
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private static final String LOG_TAG = "PrintServiceSettings";
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private static final int LOADER_ID_PRINTERS_LOADER = 1;
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private static final int LOADER_ID_PRINT_SERVICE_LOADER = 2;
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private final AdapterDataObserver mDataObserver = new AdapterDataObserver() {
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@Override
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public void onChanged() {
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invalidateOptionsMenuIfNeeded();
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updateEmptyView();
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}
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private void invalidateOptionsMenuIfNeeded() {
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final int unfilteredItemCount = mPrintersAdapter.getUnfilteredCount();
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if ((mLastUnfilteredItemCount <= 0 && unfilteredItemCount > 0)
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|| mLastUnfilteredItemCount > 0 && unfilteredItemCount <= 0) {
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getActivity().invalidateOptionsMenu();
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}
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mLastUnfilteredItemCount = unfilteredItemCount;
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}
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};
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private SwitchBar mSwitchBar;
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private ToggleSwitch mToggleSwitch;
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private String mPreferenceKey;
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private Intent mSettingsIntent;
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private Intent mAddPrintersIntent;
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private ComponentName mComponentName;
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private PrintersAdapter mPrintersAdapter;
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private int mLastUnfilteredItemCount;
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private boolean mServiceEnabled;
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private SearchView mSearchView;
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@Override
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public int getMetricsCategory() {
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return SettingsEnums.PRINT_SERVICE_SETTINGS;
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}
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@Override
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public void onCreate(Bundle icicle) {
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super.onCreate(icicle);
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String title = getArguments().getString(PrintSettingsFragment.EXTRA_TITLE);
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if (!TextUtils.isEmpty(title)) {
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getActivity().setTitle(title);
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}
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}
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container,
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Bundle savedInstanceState) {
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View root = super.onCreateView(inflater, container, savedInstanceState);
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mServiceEnabled = getArguments().getBoolean(PrintSettingsFragment.EXTRA_CHECKED);
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return root;
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}
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@Override
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public void onStart() {
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super.onStart();
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initComponents();
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updateUiForArguments();
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updateEmptyView();
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updateUiForServiceState();
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}
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@Override
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public void onPause() {
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if (mSearchView != null) {
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mSearchView.setOnQueryTextListener(null);
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}
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super.onPause();
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}
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@Override
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public void onStop() {
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super.onStop();
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mSwitchBar.removeOnSwitchChangeListener(this);
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mSwitchBar.hide();
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mPrintersAdapter.unregisterAdapterDataObserver(mDataObserver);
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}
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private void onPreferenceToggled(String preferenceKey, boolean enabled) {
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((PrintManager)getContext().getSystemService(Context.PRINT_SERVICE))
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.setPrintServiceEnabled(mComponentName, enabled);
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}
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private void updateEmptyView() {
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ViewGroup contentRoot = (ViewGroup) getListView().getParent();
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View emptyView = getEmptyView();
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if (!mToggleSwitch.isChecked()) {
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if (emptyView != null) {
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contentRoot.removeView(emptyView);
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emptyView = null;
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}
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if (emptyView == null) {
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emptyView = getActivity().getLayoutInflater().inflate(
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R.layout.empty_print_state, contentRoot, false);
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TextView textView = (TextView) emptyView.findViewById(R.id.message);
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textView.setText(R.string.print_service_disabled);
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contentRoot.addView(emptyView);
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setEmptyView(emptyView);
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}
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} else if (mPrintersAdapter.getUnfilteredCount() <= 0) {
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if (emptyView != null) {
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contentRoot.removeView(emptyView);
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emptyView = null;
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}
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if (emptyView == null) {
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emptyView = getActivity().getLayoutInflater().inflate(
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R.layout.empty_printers_list_service_enabled, contentRoot, false);
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contentRoot.addView(emptyView);
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setEmptyView(emptyView);
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}
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} else if (mPrintersAdapter.getItemCount() <= 0) {
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if (emptyView != null) {
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contentRoot.removeView(emptyView);
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emptyView = null;
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}
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if (emptyView == null) {
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emptyView = getActivity().getLayoutInflater().inflate(
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R.layout.empty_print_state, contentRoot, false);
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TextView textView = (TextView) emptyView.findViewById(R.id.message);
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textView.setText(R.string.print_no_printers_found);
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contentRoot.addView(emptyView);
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setEmptyView(emptyView);
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}
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} else if (mPrintersAdapter.getItemCount() > 0) {
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if (emptyView != null) {
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contentRoot.removeView(emptyView);
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}
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}
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}
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private void updateUiForServiceState() {
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if (mServiceEnabled) {
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mSwitchBar.setCheckedInternal(true);
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mPrintersAdapter.enable();
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} else {
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mSwitchBar.setCheckedInternal(false);
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mPrintersAdapter.disable();
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}
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getActivity().invalidateOptionsMenu();
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}
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private void initComponents() {
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mPrintersAdapter = new PrintersAdapter();
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mPrintersAdapter.registerAdapterDataObserver(mDataObserver);
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final SettingsActivity activity = (SettingsActivity) getActivity();
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mSwitchBar = activity.getSwitchBar();
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mSwitchBar.addOnSwitchChangeListener(this);
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mSwitchBar.show();
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mToggleSwitch = mSwitchBar.getSwitch();
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mToggleSwitch.setOnBeforeCheckedChangeListener((toggleSwitch, checked) -> {
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onPreferenceToggled(mPreferenceKey, checked);
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return false;
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});
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getListView().setAdapter(mPrintersAdapter);
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}
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@Override
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public void onSwitchChanged(Switch switchView, boolean isChecked) {
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updateEmptyView();
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}
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private void updateUiForArguments() {
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Bundle arguments = getArguments();
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// Component name.
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mComponentName = ComponentName.unflattenFromString(arguments
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.getString(PrintSettingsFragment.EXTRA_SERVICE_COMPONENT_NAME));
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// Key.
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mPreferenceKey = mComponentName.flattenToString();
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// Enabled.
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final boolean enabled = arguments.getBoolean(PrintSettingsFragment.EXTRA_CHECKED);
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mSwitchBar.setCheckedInternal(enabled);
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getLoaderManager().initLoader(LOADER_ID_PRINT_SERVICE_LOADER, null, this);
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setHasOptionsMenu(true);
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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 SettingsPrintServicesLoader(
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(PrintManager) getContext().getSystemService(Context.PRINT_SERVICE), getContext(),
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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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PrintServiceInfo service = null;
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if (services != null) {
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final int numServices = services.size();
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for (int i = 0; i < numServices; i++) {
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if (services.get(i).getComponentName().equals(mComponentName)) {
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service = services.get(i);
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break;
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}
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}
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}
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if (service == null) {
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// The print service was uninstalled
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finishFragment();
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}
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mServiceEnabled = service.isEnabled();
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if (service.getSettingsActivityName() != null) {
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Intent settingsIntent = new Intent(Intent.ACTION_MAIN);
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settingsIntent.setComponent(
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new ComponentName(service.getComponentName().getPackageName(),
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service.getSettingsActivityName()));
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List<ResolveInfo> resolvedActivities = getPackageManager().queryIntentActivities(
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settingsIntent, 0);
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if (!resolvedActivities.isEmpty()) {
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// The activity is a component name, therefore it is one or none.
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if (resolvedActivities.get(0).activityInfo.exported) {
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mSettingsIntent = settingsIntent;
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}
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}
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} else {
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mSettingsIntent = null;
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}
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if (service.getAddPrintersActivityName() != null) {
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Intent addPrintersIntent = new Intent(Intent.ACTION_MAIN);
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addPrintersIntent.setComponent(
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new ComponentName(service.getComponentName().getPackageName(),
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service.getAddPrintersActivityName()));
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List<ResolveInfo> resolvedActivities = getPackageManager().queryIntentActivities(
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addPrintersIntent, 0);
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if (!resolvedActivities.isEmpty()) {
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// The activity is a component name, therefore it is one or none.
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if (resolvedActivities.get(0).activityInfo.exported) {
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mAddPrintersIntent = addPrintersIntent;
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}
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}
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} else {
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mAddPrintersIntent = null;
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}
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updateUiForServiceState();
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}
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@Override
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public void onLoaderReset(Loader<List<PrintServiceInfo>> loader) {
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updateUiForServiceState();
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}
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@Override
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public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
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super.onCreateOptionsMenu(menu, inflater);
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inflater.inflate(R.menu.print_service_settings, menu);
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MenuItem addPrinters = menu.findItem(R.id.print_menu_item_add_printer);
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if (mServiceEnabled && mAddPrintersIntent != null) {
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addPrinters.setIntent(mAddPrintersIntent);
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} else {
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menu.removeItem(R.id.print_menu_item_add_printer);
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}
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MenuItem settings = menu.findItem(R.id.print_menu_item_settings);
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if (mServiceEnabled && mSettingsIntent != null) {
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settings.setIntent(mSettingsIntent);
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} else {
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menu.removeItem(R.id.print_menu_item_settings);
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}
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MenuItem searchItem = menu.findItem(R.id.print_menu_item_search);
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if (mServiceEnabled && mPrintersAdapter.getUnfilteredCount() > 0) {
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mSearchView = (SearchView) searchItem.getActionView();
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mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
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@Override
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public boolean onQueryTextSubmit(String query) {
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return true;
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}
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@Override
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public boolean onQueryTextChange(String searchString) {
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mPrintersAdapter.getFilter().filter(searchString);
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return true;
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}
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});
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mSearchView.addOnAttachStateChangeListener(new View.OnAttachStateChangeListener() {
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@Override
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public void onViewAttachedToWindow(View view) {
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if (AccessibilityManager.getInstance(getActivity()).isEnabled()) {
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view.announceForAccessibility(getString(
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R.string.print_search_box_shown_utterance));
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}
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}
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@Override
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public void onViewDetachedFromWindow(View view) {
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Activity activity = getActivity();
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if (activity != null && !activity.isFinishing()
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&& AccessibilityManager.getInstance(activity).isEnabled()) {
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view.announceForAccessibility(getString(
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R.string.print_search_box_hidden_utterance));
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}
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}
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});
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} else {
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menu.removeItem(R.id.print_menu_item_search);
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}
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}
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public static class ViewHolder extends RecyclerView.ViewHolder {
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public ViewHolder(@NonNull View itemView) {
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super(itemView);
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}
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}
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private final class PrintersAdapter extends RecyclerView.Adapter<ViewHolder>
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implements LoaderManager.LoaderCallbacks<List<PrinterInfo>>, Filterable {
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private final Object mLock = new Object();
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private final List<PrinterInfo> mPrinters = new ArrayList<PrinterInfo>();
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private final List<PrinterInfo> mFilteredPrinters = new ArrayList<PrinterInfo>();
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private CharSequence mLastSearchString;
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public void enable() {
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getLoaderManager().initLoader(LOADER_ID_PRINTERS_LOADER, null, this);
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}
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public void disable() {
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getLoaderManager().destroyLoader(LOADER_ID_PRINTERS_LOADER);
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mPrinters.clear();
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}
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public int getUnfilteredCount() {
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return mPrinters.size();
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}
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@Override
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public Filter getFilter() {
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return new Filter() {
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@Override
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protected FilterResults performFiltering(CharSequence constraint) {
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synchronized (mLock) {
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if (TextUtils.isEmpty(constraint)) {
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return null;
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}
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FilterResults results = new FilterResults();
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List<PrinterInfo> filteredPrinters = new ArrayList<PrinterInfo>();
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String constraintLowerCase = constraint.toString().toLowerCase();
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final int printerCount = mPrinters.size();
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for (int i = 0; i < printerCount; i++) {
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PrinterInfo printer = mPrinters.get(i);
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String name = printer.getName();
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if (name != null && name.toLowerCase().contains(constraintLowerCase)) {
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filteredPrinters.add(printer);
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}
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}
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results.values = filteredPrinters;
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results.count = filteredPrinters.size();
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return results;
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}
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}
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@Override
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@SuppressWarnings("unchecked")
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protected void publishResults(CharSequence constraint, FilterResults results) {
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synchronized (mLock) {
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mLastSearchString = constraint;
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mFilteredPrinters.clear();
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if (results == null) {
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mFilteredPrinters.addAll(mPrinters);
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} else {
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List<PrinterInfo> printers = (List<PrinterInfo>) results.values;
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mFilteredPrinters.addAll(printers);
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}
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}
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notifyDataSetChanged();
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}
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};
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}
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@Override
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public int getItemCount() {
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synchronized (mLock) {
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return mFilteredPrinters.size();
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}
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}
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private Object getItem(int position) {
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synchronized (mLock) {
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return mFilteredPrinters.get(position);
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}
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}
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@Override
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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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* Checks if a printer can be used for printing
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*
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* @param position The position of the printer in the list
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* @return true iff the printer can be used for printing.
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*/
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public boolean isActionable(int position) {
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PrinterInfo printer = (PrinterInfo) getItem(position);
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return printer.getStatus() != PrinterInfo.STATUS_UNAVAILABLE;
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}
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@NonNull
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@Override
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public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
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final View view = LayoutInflater.from(parent.getContext())
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.inflate(R.layout.printer_dropdown_item, parent, false);
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return new ViewHolder(view);
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}
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@Override
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public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
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holder.itemView.setEnabled(isActionable(position));
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final PrinterInfo printer = (PrinterInfo) getItem(position);
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CharSequence title = printer.getName();
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CharSequence subtitle = printer.getDescription();
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Drawable icon = printer.loadIcon(getActivity());
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TextView titleView = holder.itemView.findViewById(R.id.title);
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titleView.setText(title);
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TextView subtitleView = holder.itemView.findViewById(R.id.subtitle);
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if (!TextUtils.isEmpty(subtitle)) {
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subtitleView.setText(subtitle);
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subtitleView.setVisibility(View.VISIBLE);
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} else {
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subtitleView.setText(null);
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subtitleView.setVisibility(View.GONE);
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}
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LinearLayout moreInfoView = holder.itemView.findViewById(R.id.more_info);
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if (printer.getInfoIntent() != null) {
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moreInfoView.setVisibility(View.VISIBLE);
|
|
moreInfoView.setOnClickListener(new OnClickListener() {
|
|
@Override
|
|
public void onClick(View v) {
|
|
try {
|
|
getActivity().startIntentSender(
|
|
printer.getInfoIntent().getIntentSender(), null, 0, 0, 0);
|
|
} catch (SendIntentException e) {
|
|
Log.e(LOG_TAG, "Could not execute pending info intent: %s", e);
|
|
}
|
|
}
|
|
});
|
|
} else {
|
|
moreInfoView.setVisibility(View.GONE);
|
|
}
|
|
|
|
ImageView iconView = holder.itemView.findViewById(R.id.icon);
|
|
if (icon != null) {
|
|
iconView.setVisibility(View.VISIBLE);
|
|
if (!isActionable(position)) {
|
|
icon.mutate();
|
|
|
|
TypedValue value = new TypedValue();
|
|
getActivity().getTheme().resolveAttribute(android.R.attr.disabledAlpha, value,
|
|
true);
|
|
icon.setAlpha((int)(value.getFloat() * 255));
|
|
}
|
|
iconView.setImageDrawable(icon);
|
|
} else {
|
|
iconView.setVisibility(View.GONE);
|
|
}
|
|
|
|
holder.itemView.setOnClickListener(v -> {
|
|
PrinterInfo pi = (PrinterInfo) getItem(position);
|
|
|
|
if (pi.getInfoIntent() != null) {
|
|
try {
|
|
getActivity().startIntentSender(pi.getInfoIntent().getIntentSender(),
|
|
null, 0, 0, 0);
|
|
} catch (SendIntentException e) {
|
|
Log.e(LOG_TAG, "Could not execute info intent: %s", e);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public Loader<List<PrinterInfo>> onCreateLoader(int id, Bundle args) {
|
|
if (id == LOADER_ID_PRINTERS_LOADER) {
|
|
return new PrintersLoader(getContext());
|
|
}
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public void onLoadFinished(Loader<List<PrinterInfo>> loader,
|
|
List<PrinterInfo> printers) {
|
|
synchronized (mLock) {
|
|
mPrinters.clear();
|
|
final int printerCount = printers.size();
|
|
for (int i = 0; i < printerCount; i++) {
|
|
PrinterInfo printer = printers.get(i);
|
|
if (printer.getId().getServiceName().equals(mComponentName)) {
|
|
mPrinters.add(printer);
|
|
}
|
|
}
|
|
mFilteredPrinters.clear();
|
|
mFilteredPrinters.addAll(mPrinters);
|
|
if (!TextUtils.isEmpty(mLastSearchString)) {
|
|
getFilter().filter(mLastSearchString);
|
|
}
|
|
}
|
|
notifyDataSetChanged();
|
|
}
|
|
|
|
@Override
|
|
public void onLoaderReset(Loader<List<PrinterInfo>> loader) {
|
|
synchronized (mLock) {
|
|
mPrinters.clear();
|
|
mFilteredPrinters.clear();
|
|
mLastSearchString = null;
|
|
}
|
|
notifyDataSetChanged();
|
|
}
|
|
}
|
|
|
|
private static class PrintersLoader extends Loader<List<PrinterInfo>> {
|
|
|
|
private static final String LOG_TAG = "PrintersLoader";
|
|
|
|
private static final boolean DEBUG = false;
|
|
|
|
private final Map<PrinterId, PrinterInfo> mPrinters =
|
|
new LinkedHashMap<PrinterId, PrinterInfo>();
|
|
|
|
private PrinterDiscoverySession mDiscoverySession;
|
|
|
|
public PrintersLoader(Context context) {
|
|
super(context);
|
|
}
|
|
|
|
@Override
|
|
public void deliverResult(List<PrinterInfo> printers) {
|
|
if (isStarted()) {
|
|
super.deliverResult(printers);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected void onStartLoading() {
|
|
if (DEBUG) {
|
|
Log.i(LOG_TAG, "onStartLoading()");
|
|
}
|
|
// The contract is that if we already have a valid,
|
|
// result the we have to deliver it immediately.
|
|
if (!mPrinters.isEmpty()) {
|
|
deliverResult(new ArrayList<PrinterInfo>(mPrinters.values()));
|
|
}
|
|
// We want to start discovery at this point.
|
|
onForceLoad();
|
|
}
|
|
|
|
@Override
|
|
protected void onStopLoading() {
|
|
if (DEBUG) {
|
|
Log.i(LOG_TAG, "onStopLoading()");
|
|
}
|
|
onCancelLoad();
|
|
}
|
|
|
|
@Override
|
|
protected void onForceLoad() {
|
|
if (DEBUG) {
|
|
Log.i(LOG_TAG, "onForceLoad()");
|
|
}
|
|
loadInternal();
|
|
}
|
|
|
|
@Override
|
|
protected boolean onCancelLoad() {
|
|
if (DEBUG) {
|
|
Log.i(LOG_TAG, "onCancelLoad()");
|
|
}
|
|
return cancelInternal();
|
|
}
|
|
|
|
@Override
|
|
protected void onReset() {
|
|
if (DEBUG) {
|
|
Log.i(LOG_TAG, "onReset()");
|
|
}
|
|
onStopLoading();
|
|
mPrinters.clear();
|
|
if (mDiscoverySession != null) {
|
|
mDiscoverySession.destroy();
|
|
mDiscoverySession = null;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected void onAbandon() {
|
|
if (DEBUG) {
|
|
Log.i(LOG_TAG, "onAbandon()");
|
|
}
|
|
onStopLoading();
|
|
}
|
|
|
|
private boolean cancelInternal() {
|
|
if (mDiscoverySession != null
|
|
&& mDiscoverySession.isPrinterDiscoveryStarted()) {
|
|
mDiscoverySession.stopPrinterDiscovery();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private void loadInternal() {
|
|
if (mDiscoverySession == null) {
|
|
PrintManager printManager = (PrintManager) getContext()
|
|
.getSystemService(Context.PRINT_SERVICE);
|
|
mDiscoverySession = printManager.createPrinterDiscoverySession();
|
|
mDiscoverySession.setOnPrintersChangeListener(new OnPrintersChangeListener() {
|
|
@Override
|
|
public void onPrintersChanged() {
|
|
deliverResult(new ArrayList<PrinterInfo>(
|
|
mDiscoverySession.getPrinters()));
|
|
}
|
|
});
|
|
}
|
|
mDiscoverySession.startPrinterDiscovery(null);
|
|
}
|
|
}
|
|
}
|