Add activities to support voice settings.

Adds Voice Interaction Activities for:
- Do not disturb mode (with interaction)
- Battery Saver mode
- Airplane mode

Change-Id: I4480dc3a30975d94b71714ff58fbeebddfbc1c58

src/com/android/settings/utils/VoiceSelectionFragment.java

@@ -0,0 +1,133 @@
+/*
+ * 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.utils;
+
+import android.app.ListFragment;
+import android.app.VoiceInteractor;
+import android.app.VoiceInteractor.PickOptionRequest;
+import android.app.VoiceInteractor.PickOptionRequest.Option;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.ArrayAdapter;
+import android.widget.ListAdapter;
+import android.widget.ListView;
+
+import java.util.List;
+
+/**
+ * An Activity fragment that presents a set of options as a visual list and also allows
+ * items to be selected by the users voice.
+ */
+public class VoiceSelectionFragment extends ListFragment {
+    private static final String EXTRA_SELECTION_PROMPT = "selection_prompt";
+
+    private CharSequence mPrompt = null;
+    private VoiceInteractor.Request mRequest = null;
+    private VoiceInteractor mVoiceInteractor = null;
+    private VoiceSelection.OnItemSelectedListener mOnItemSelectedListener = null;
+
+    /**
+     * No-args ctor required for fragment.
+     */
+    public VoiceSelectionFragment() {}
+
+    @Override
+    public void onCreate(Bundle args) {
+        super.onCreate(args);
+        mPrompt = getArguments().getCharSequence(EXTRA_SELECTION_PROMPT);
+    }
+
+    /**
+     * Set the prompt spoken when the fragment is presented.
+     */
+    static public Bundle createArguments(CharSequence prompt) {
+        Bundle args = new Bundle();
+        args.putCharSequence(EXTRA_SELECTION_PROMPT, prompt);
+        return args;
+    }
+
+    private VoiceSelection getSelectionAt(int position) {
+        return ((ArrayAdapter<VoiceSelection>) getListAdapter()).getItem(position);
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+
+        final int numItems = getListAdapter().getCount();
+        if (numItems <= 0) {
+            return;
+        }
+
+        Option[] options = new Option[numItems];
+        for (int idx = 0; idx < numItems; idx++) {
+            options[idx] = getSelectionAt(idx).toOption(idx);
+        }
+        mRequest = new PickOptionRequest(mPrompt, options, null) {
+            @Override
+            public void onPickOptionResult(boolean isComplete, Option[] options, Bundle args) {
+                if (!isComplete || options == null) {
+                    return;
+                }
+                if (options.length == 1 && mOnItemSelectedListener != null) {
+                    int idx = options[0].getExtras().getInt("index", -1);
+                    mOnItemSelectedListener.onItemSelected(idx, getSelectionAt(idx));
+                } else {
+                    onCancel();
+                }
+            }
+        };
+        mVoiceInteractor = getActivity().getVoiceInteractor();
+        if (mVoiceInteractor != null) {
+            mVoiceInteractor.submitRequest(mRequest);
+        }
+    }
+
+    @Override
+    public void onDetach() {
+        super.onDetach();
+        mVoiceInteractor = null;
+    }
+
+    @Override
+    public void onListItemClick(ListView l, View v, int position, long id) {
+        if (mRequest != null) {
+            mRequest.cancel();
+            mRequest = null;
+        }
+
+        if (mOnItemSelectedListener != null) {
+          mOnItemSelectedListener.onItemSelected(position, getSelectionAt(position));
+        }
+    }
+
+
+    /**
+     * Sets the selection handler for an item either by voice or by touch.
+     */
+    public void setOnItemSelectedHandler(VoiceSelection.OnItemSelectedListener listener) {
+        mOnItemSelectedListener = listener;
+    }
+
+    /**
+     * Called when the user cancels the interaction. The default implementation is to
+     * finish the activity.
+     */
+    public void onCancel() {
+        getActivity().finish();
+    }
+};