New top-level Dock in Settings and a Dock Settings screen with Audio item. #2367275

Add a new top-level setting for car/desktop dock settings.
Sub menu contains one item - Audio (settings)
Sub text for Audio shows current docked status and launches either the
 audio settings or a dialog saying that you're not docked and you need to
 buy a new dock from Google (kidding).

src/com/android/settings/DockSettings.java

@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2010 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 android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.BroadcastReceiver;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceScreen;
+
+import com.android.settings.bluetooth.DockEventReceiver;
+
+public class DockSettings extends PreferenceActivity {
+
+    private static final int DIALOG_NOT_DOCKED = 1;
+    private static final String KEY_AUDIO_SETTINGS = "dock_audio";
+    private Preference mAudioSettings;
+    private Intent mDockIntent;
+
+    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (intent.getAction().equals(Intent.ACTION_DOCK_EVENT)) {
+                handleDockChange(intent);
+            }
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        ContentResolver resolver = getContentResolver();
+        addPreferencesFromResource(R.xml.dock_settings);
+
+        initDockSettings();
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        IntentFilter filter = new IntentFilter(Intent.ACTION_DOCK_EVENT);
+        registerReceiver(mReceiver, filter);
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+
+        unregisterReceiver(mReceiver);
+    }
+
+    private void initDockSettings() {
+        mAudioSettings = findPreference(KEY_AUDIO_SETTINGS);
+    }
+
+    private void handleDockChange(Intent intent) {
+        if (mAudioSettings != null) {
+            int dockState = intent.getIntExtra(Intent.EXTRA_DOCK_STATE, 0);
+            mDockIntent = intent;
+            int resId = R.string.dock_audio_summary_unknown;
+            switch (dockState) {
+            case Intent.EXTRA_DOCK_STATE_CAR:
+                resId = R.string.dock_audio_summary_car;
+                break;
+            case Intent.EXTRA_DOCK_STATE_DESK:
+                resId = R.string.dock_audio_summary_desk;
+                break;
+            case Intent.EXTRA_DOCK_STATE_UNDOCKED:
+                resId = R.string.dock_audio_summary_none;
+            }
+            mAudioSettings.setSummary(resId);
+            if (dockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
+                // remove undocked dialog if currently showing.
+                try {
+                    dismissDialog(DIALOG_NOT_DOCKED);
+                } catch (IllegalArgumentException iae) {
+                    // Maybe it was already dismissed
+                }
+            }
+        }
+    }
+
+    @Override
+    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
+        if (preference == mAudioSettings) {
+            int dockState = mDockIntent.getIntExtra(Intent.EXTRA_DOCK_STATE, 0);
+            if (dockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
+                showDialog(DIALOG_NOT_DOCKED);
+            } else {
+                Intent i = new Intent(mDockIntent);
+                i.setAction(DockEventReceiver.ACTION_DOCK_SHOW_UI);
+                i.setClass(this, DockEventReceiver.class);
+                sendBroadcast(i);
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public Dialog onCreateDialog(int id) {
+        if (id == DIALOG_NOT_DOCKED) {
+            return createUndockedMessage();
+        }
+        return null;
+    }
+
+    private Dialog createUndockedMessage() {
+        final AlertDialog.Builder ab = new AlertDialog.Builder(this);
+        ab.setTitle(R.string.dock_not_found_title);
+        ab.setMessage(R.string.dock_not_found_text);
+        ab.setPositiveButton(android.R.string.ok, null);
+        return ab.create();
+    }
+}