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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings;
import java.util.List;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.UserHandle;
import android.preference.Preference;
import android.preference.PreferenceGroup;
import android.preference.SwitchPreference;
import android.service.trust.TrustAgentService;
import android.util.ArrayMap;
import android.util.ArraySet;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.widget.LockPatternUtils;
public class TrustAgentSettings extends SettingsPreferenceFragment implements
Preference.OnPreferenceChangeListener {
private static final String SERVICE_INTERFACE = TrustAgentService.SERVICE_INTERFACE;
private ArrayMap<ComponentName, AgentInfo> mAvailableAgents;
private final ArraySet<ComponentName> mActiveAgents = new ArraySet<ComponentName>();
private LockPatternUtils mLockPatternUtils;
private DevicePolicyManager mDpm;
public static final class AgentInfo {
CharSequence label;
ComponentName component; // service that implements ITrustAgent
SwitchPreference preference;
public Drawable icon;
@Override
public boolean equals(Object other) {
if (other instanceof AgentInfo) {
return component.equals(((AgentInfo)other).component);
}
return true;
}
public int compareTo(AgentInfo other) {
return component.compareTo(other.component);
}
}
@Override
protected int getMetricsCategory() {
return MetricsLogger.TRUST_AGENT;
}
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
mDpm = getActivity().getSystemService(DevicePolicyManager.class);
addPreferencesFromResource(R.xml.trust_agent_settings);
}
public void onResume() {
super.onResume();
removePreference("dummy_preference");
updateAgents();
};
private void updateAgents() {
final Context context = getActivity();
if (mAvailableAgents == null) {
mAvailableAgents = findAvailableTrustAgents();
}
if (mLockPatternUtils == null) {
mLockPatternUtils = new LockPatternUtils(getActivity());
}
loadActiveAgents();
PreferenceGroup category =
(PreferenceGroup) getPreferenceScreen().findPreference("trust_agents");
category.removeAll();
boolean disabledByDevicePolicy = (mDpm.getKeyguardDisabledFeatures(null)
& DevicePolicyManager.KEYGUARD_DISABLE_TRUST_AGENTS) != 0;
final int count = mAvailableAgents.size();
for (int i = 0; i < count; i++) {
AgentInfo agent = mAvailableAgents.valueAt(i);
final SwitchPreference preference = new SwitchPreference(context);
agent.preference = preference;
preference.setPersistent(false);
preference.setTitle(agent.label);
preference.setIcon(agent.icon);
preference.setPersistent(false);
preference.setOnPreferenceChangeListener(this);
preference.setChecked(mActiveAgents.contains(agent.component));
if (disabledByDevicePolicy
&& mDpm.getTrustAgentConfiguration(null, agent.component) == null) {
preference.setChecked(false);
preference.setEnabled(false);
preference.setSummary(R.string.trust_agent_disabled_device_admin);
}
category.addPreference(agent.preference);
}
}
private void loadActiveAgents() {
List<ComponentName> activeTrustAgents = mLockPatternUtils.getEnabledTrustAgents(
UserHandle.myUserId());
if (activeTrustAgents != null) {
mActiveAgents.addAll(activeTrustAgents);
}
}
private void saveActiveAgents() {
mLockPatternUtils.setEnabledTrustAgents(mActiveAgents,
UserHandle.myUserId());
}
ArrayMap<ComponentName, AgentInfo> findAvailableTrustAgents() {
PackageManager pm = getActivity().getPackageManager();
Intent trustAgentIntent = new Intent(SERVICE_INTERFACE);
List<ResolveInfo> resolveInfos = pm.queryIntentServices(trustAgentIntent,
PackageManager.GET_META_DATA);
ArrayMap<ComponentName, AgentInfo> agents = new ArrayMap<ComponentName, AgentInfo>();
final int count = resolveInfos.size();
agents.ensureCapacity(count);
for (int i = 0; i < count; i++ ) {
ResolveInfo resolveInfo = resolveInfos.get(i);
if (resolveInfo.serviceInfo == null) continue;
if (!TrustAgentUtils.checkProvidePermission(resolveInfo, pm)) continue;
ComponentName name = TrustAgentUtils.getComponentName(resolveInfo);
AgentInfo agentInfo = new AgentInfo();
agentInfo.label = resolveInfo.loadLabel(pm);
agentInfo.icon = resolveInfo.loadIcon(pm);
agentInfo.component = name;
agents.put(name, agentInfo);
}
return agents;
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (preference instanceof SwitchPreference) {
final int count = mAvailableAgents.size();
for (int i = 0; i < count; i++) {
AgentInfo agent = mAvailableAgents.valueAt(i);
if (agent.preference == preference) {
if ((Boolean) newValue) {
if (!mActiveAgents.contains(agent.component)) {
mActiveAgents.add(agent.component);
}
} else {
mActiveAgents.remove(agent.component);
}
saveActiveAgents();
return true;
}
}
}
return false;
}
}
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