Use SwitchPreference in TrustAgentSettings.

Fixes bug 16900059

Change-Id: I52dcfd2a2651f8f770477df3c72176303a9d1b39

1 files changed, 157 insertions, 0 deletions

diff --git a/src/com/android/settings/TrustAgentSettings.java b/src/com/android/settings/TrustAgentSettings.java
new file mode 100644
index 0000000..54fef36
--- /dev/null
+++ b/src/com/android/settings/TrustAgentSettings.java
@@ -0,0 +1,157 @@
+/*
+ * 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.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.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.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;
+
+    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
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.trust_agent_settings);
+    }
+
+    public void onResume() {
+        super.onResume();
+        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();
+        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));
+            category.addPreference(agent.preference);
+        }
+    }
+
+    private void loadActiveAgents() {
+        List<ComponentName> activeTrustAgents = mLockPatternUtils.getEnabledTrustAgents();
+        if (activeTrustAgents != null) {
+            mActiveAgents.addAll(activeTrustAgents);
+        }
+    }
+
+    private void saveActiveAgents() {
+        mLockPatternUtils.setEnabledTrustAgents(mActiveAgents);
+    }
+
+    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;
+    }
+
+}