Move some wifi tracking code to SettingsLib

Move tracking of which networks are available/saved and their state
over to SettingsLib to share it with Quick Settings.

Bug: 19180466
Change-Id: Iaeef06b26da8cb38e1ba09a7d105d04d499dc181

src/com/android/settings/wifi/AccessPointPreference.java

@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2015 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.wifi;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.StateListDrawable;
+import android.net.wifi.WifiConfiguration;
+import android.preference.Preference;
+import android.view.View;
+import android.widget.TextView;
+
+import com.android.settings.R;
+import com.android.settingslib.wifi.AccessPoint;
+
+public class AccessPointPreference extends Preference {
+
+    private static final int[] STATE_SECURED = {
+        R.attr.state_encrypted
+    };
+    private static final int[] STATE_NONE = {};
+
+    private static int[] wifi_signal_attributes = { R.attr.wifi_signal };
+
+    private TextView mSummaryView;
+    private boolean showSummary = true;
+    private AccessPoint mAccessPoint;
+
+    public AccessPointPreference(AccessPoint accessPoint, Context context) {
+        super(context);
+        mAccessPoint = accessPoint;
+        mAccessPoint.setTag(this);
+        refresh();
+    }
+
+    public AccessPoint getAccessPoint() {
+        return mAccessPoint;
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+        updateIcon(mAccessPoint.getLevel(), getContext());
+
+        mSummaryView = (TextView) view.findViewById(com.android.internal.R.id.summary);
+        mSummaryView.setVisibility(showSummary ? View.VISIBLE : View.GONE);
+
+        notifyChanged();
+    }
+
+    public void showAppIcon() {
+        PackageManager pm = getContext().getPackageManager();
+        String systemName = pm.getNameForUid(android.os.Process.SYSTEM_UID);
+        WifiConfiguration mConfig = mAccessPoint.getConfig();
+
+        Drawable drawable = pm.getDefaultActivityIcon();
+        if (mConfig == null) {
+            drawable.setAlpha(0);
+        } else if (mConfig.creatorName.equals(systemName)) {
+            drawable = getContext().getApplicationInfo().loadIcon(pm);
+        } else {
+            try {
+                drawable = pm.getApplicationIcon(mConfig.creatorName);
+            } catch (NameNotFoundException nnfe) {
+                // use default app icon
+            }
+        }
+
+        setIcon(drawable);
+    }
+
+    protected void updateIcon(int level, Context context) {
+        if (level == -1) {
+            setIcon(null);
+        } else {
+            Drawable drawable = getIcon();
+
+            if (drawable == null) {
+                // To avoid a drawing race condition, we first set the state (SECURE/NONE) and then
+                // set the icon (drawable) to that state's drawable.
+                StateListDrawable sld = (StateListDrawable) context.getTheme()
+                        .obtainStyledAttributes(wifi_signal_attributes).getDrawable(0);
+                // If sld is null then we are indexing and therefore do not have access to
+                // (nor need to display) the drawable.
+                if (sld != null) {
+                    sld.setState((mAccessPoint.getSecurity() != AccessPoint.SECURITY_NONE)
+                            ? STATE_SECURED
+                            : STATE_NONE);
+                    drawable = sld.getCurrent();
+                    setIcon(drawable);
+                }
+            }
+
+            if (drawable != null) {
+                drawable.setLevel(level);
+            }
+        }
+    }
+
+    /**
+     * Shows or Hides the Summary of an AccessPoint.
+     *
+     * @param showSummary true will show the summary, false will hide the summary
+     */
+    public void setShowSummary(boolean showSummary) {
+        this.showSummary = showSummary;
+        if (mSummaryView != null) {
+            mSummaryView.setVisibility(showSummary ? View.VISIBLE : View.GONE);
+        } // otherwise, will be handled in onBindView.
+    }
+
+    /**
+     * Updates the title and summary; may indirectly call notifyChanged().
+     */
+    public void refresh() {
+        setTitle(mAccessPoint.getSsid());
+
+        final Context context = getContext();
+        updateIcon(mAccessPoint.getLevel(), context);
+
+        // Force new summary
+        setSummary(null);
+
+        String summary = mAccessPoint.getSummary();
+        if (summary.length() > 0) {
+            setSummary(summary);
+            setShowSummary(true);
+        } else {
+            setShowSummary(false);
+        }
+    }
+
+    public void onLevelChanged() {
+        notifyChanged();
+    }
+
+}