Create RestrictedDashboardFragment.
RestrictedDashboardFragment has all the same logic coming from RestrcitedSettingsFragment but extends from DashboardFragment. As a result, we could use preferenceController in child class of RestrictedDashboardFragment. This cl also make DeviceListPreferenceFragment as child of RestrictedDashboardFragment, which enfluences the bluetooth page. Bug: 38041586 Test: Build Change-Id: I01395d506176c5cc584948478f7ca16c1c7c7045
This commit is contained in:
jackqdyulei
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/*
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* Copyright (C) 2017 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.dashboard;
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import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
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import android.app.Activity;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.content.RestrictionsManager;
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import android.os.Bundle;
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import android.os.PersistableBundle;
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import android.os.UserHandle;
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import android.os.UserManager;
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import android.view.View;
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import android.widget.TextView;
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import com.android.settings.R;
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import com.android.settings.RestrictedSettingsFragment;
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import com.android.settings.ShowAdminSupportDetailsDialog;
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import com.android.settingslib.RestrictedLockUtils;
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/**
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* Base class for settings screens that should be pin protected when in restricted mode or
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* that will display an admin support message in case an admin has disabled the options.
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* The constructor for this class will take the restriction key that this screen should be
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* locked by. If {@link RestrictionsManager.hasRestrictionsProvider()} and
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* {@link UserManager.hasUserRestriction()}, then the user will have to enter the restrictions
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* pin before seeing the Settings screen.
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*
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* {@link RestrictionsManager.hasRestrictionsProvider()} returns true, pass in
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* {@link RESTRICT_IF_OVERRIDABLE} to the constructor instead of a restrictions key.
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*
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* This fragment is a replacement of {@link RestrictedSettingsFragment} but extends
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* from {@link DashboardFragment}, so we could also use
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* {@link com.android.settings.core.PreferenceController} in this fragment.
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*/
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public abstract class RestrictedDashboardFragment extends DashboardFragment {
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protected static final String RESTRICT_IF_OVERRIDABLE = "restrict_if_overridable";
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// No RestrictedSettingsFragment screens should use this number in startActivityForResult.
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private static final int REQUEST_PIN_CHALLENGE = 12309;
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private static final String KEY_CHALLENGE_SUCCEEDED = "chsc";
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private static final String KEY_CHALLENGE_REQUESTED = "chrq";
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// If the restriction PIN is entered correctly.
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private boolean mChallengeSucceeded;
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private boolean mChallengeRequested;
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private UserManager mUserManager;
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private RestrictionsManager mRestrictionsManager;
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private final String mRestrictionKey;
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private View mAdminSupportDetails;
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private EnforcedAdmin mEnforcedAdmin;
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private TextView mEmptyTextView;
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private boolean mOnlyAvailableForAdmins = false;
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private boolean mIsAdminUser;
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// Receiver to clear pin status when the screen is turned off.
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private BroadcastReceiver mScreenOffReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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if (!mChallengeRequested) {
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mChallengeSucceeded = false;
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mChallengeRequested = false;
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}
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}
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};
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/**
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* @param restrictionKey The restriction key to check before pin protecting
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* this settings page. Pass in {@link RESTRICT_IF_OVERRIDABLE} if it should
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* be protected whenever a restrictions provider is set. Pass in
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* null if it should never be protected.
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*/
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public RestrictedDashboardFragment(String restrictionKey) {
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mRestrictionKey = restrictionKey;
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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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mRestrictionsManager = (RestrictionsManager) getSystemService(Context.RESTRICTIONS_SERVICE);
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mUserManager = (UserManager) getSystemService(Context.USER_SERVICE);
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mIsAdminUser = mUserManager.isAdminUser();
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if (icicle != null) {
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mChallengeSucceeded = icicle.getBoolean(KEY_CHALLENGE_SUCCEEDED, false);
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mChallengeRequested = icicle.getBoolean(KEY_CHALLENGE_REQUESTED, false);
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}
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IntentFilter offFilter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
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offFilter.addAction(Intent.ACTION_USER_PRESENT);
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getActivity().registerReceiver(mScreenOffReceiver, offFilter);
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}
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@Override
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public void onActivityCreated(Bundle savedInstanceState) {
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super.onActivityCreated(savedInstanceState);
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mAdminSupportDetails = initAdminSupportDetailsView();
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mEmptyTextView = initEmptyTextView();
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}
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@Override
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public void onSaveInstanceState(Bundle outState) {
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super.onSaveInstanceState(outState);
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if (getActivity().isChangingConfigurations()) {
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outState.putBoolean(KEY_CHALLENGE_REQUESTED, mChallengeRequested);
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outState.putBoolean(KEY_CHALLENGE_SUCCEEDED, mChallengeSucceeded);
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}
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}
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@Override
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public void onResume() {
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super.onResume();
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if (shouldBeProviderProtected(mRestrictionKey)) {
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ensurePin();
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}
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}
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@Override
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public void onDestroy() {
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getActivity().unregisterReceiver(mScreenOffReceiver);
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super.onDestroy();
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}
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@Override
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public void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode == REQUEST_PIN_CHALLENGE) {
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if (resultCode == Activity.RESULT_OK) {
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mChallengeSucceeded = true;
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mChallengeRequested = false;
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} else {
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mChallengeSucceeded = false;
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}
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return;
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}
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super.onActivityResult(requestCode, resultCode, data);
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}
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private void ensurePin() {
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if (!mChallengeSucceeded && !mChallengeRequested
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&& mRestrictionsManager.hasRestrictionsProvider()) {
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Intent intent = mRestrictionsManager.createLocalApprovalIntent();
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if (intent != null) {
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mChallengeRequested = true;
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mChallengeSucceeded = false;
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PersistableBundle request = new PersistableBundle();
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request.putString(RestrictionsManager.REQUEST_KEY_MESSAGE,
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getResources().getString(R.string.restr_pin_enter_admin_pin));
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intent.putExtra(RestrictionsManager.EXTRA_REQUEST_BUNDLE, request);
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startActivityForResult(intent, REQUEST_PIN_CHALLENGE);
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}
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}
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}
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/**
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* Returns true if this activity is restricted, but no restrictions provider has been set.
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* Used to determine if the settings UI should disable UI.
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*/
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protected boolean isRestrictedAndNotProviderProtected() {
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if (mRestrictionKey == null || RESTRICT_IF_OVERRIDABLE.equals(mRestrictionKey)) {
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return false;
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}
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return mUserManager.hasUserRestriction(mRestrictionKey)
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&& !mRestrictionsManager.hasRestrictionsProvider();
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}
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protected boolean hasChallengeSucceeded() {
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return (mChallengeRequested && mChallengeSucceeded) || !mChallengeRequested;
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}
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/**
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* Returns true if this restrictions key is locked down.
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*/
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protected boolean shouldBeProviderProtected(String restrictionKey) {
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if (restrictionKey == null) {
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return false;
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}
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boolean restricted = RESTRICT_IF_OVERRIDABLE.equals(restrictionKey)
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|| mUserManager.hasUserRestriction(mRestrictionKey);
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return restricted && mRestrictionsManager.hasRestrictionsProvider();
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}
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private View initAdminSupportDetailsView() {
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return getActivity().findViewById(R.id.admin_support_details);
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}
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protected TextView initEmptyTextView() {
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TextView emptyView = (TextView) getActivity().findViewById(android.R.id.empty);
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return emptyView;
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}
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public EnforcedAdmin getRestrictionEnforcedAdmin() {
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mEnforcedAdmin = RestrictedLockUtils.checkIfRestrictionEnforced(getActivity(),
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mRestrictionKey, UserHandle.myUserId());
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if (mEnforcedAdmin != null && mEnforcedAdmin.userId == UserHandle.USER_NULL) {
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mEnforcedAdmin.userId = UserHandle.myUserId();
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}
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return mEnforcedAdmin;
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}
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public TextView getEmptyTextView() {
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return mEmptyTextView;
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}
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@Override
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protected void onDataSetChanged() {
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highlightPreferenceIfNeeded();
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if (mAdminSupportDetails != null && isUiRestrictedByOnlyAdmin()) {
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final EnforcedAdmin admin = getRestrictionEnforcedAdmin();
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ShowAdminSupportDetailsDialog.setAdminSupportDetails(getActivity(),
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mAdminSupportDetails, admin, false);
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setEmptyView(mAdminSupportDetails);
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} else if (mEmptyTextView != null) {
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setEmptyView(mEmptyTextView);
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}
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super.onDataSetChanged();
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}
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public void setIfOnlyAvailableForAdmins(boolean onlyForAdmins) {
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mOnlyAvailableForAdmins = onlyForAdmins;
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}
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/**
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* Returns whether restricted or actionable UI elements should be removed or disabled.
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*/
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protected boolean isUiRestricted() {
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return isRestrictedAndNotProviderProtected() || !hasChallengeSucceeded()
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|| (!mIsAdminUser && mOnlyAvailableForAdmins);
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}
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protected boolean isUiRestrictedByOnlyAdmin() {
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return isUiRestricted() && !mUserManager.hasBaseUserRestriction(mRestrictionKey,
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UserHandle.of(UserHandle.myUserId())) && (mIsAdminUser || !mOnlyAvailableForAdmins);
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}
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}
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