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diff --git a/src/com/android/camera/ui/InLineSettingItem.java b/src/com/android/camera/ui/InLineSettingItem.java
new file mode 100644
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+++ b/src/com/android/camera/ui/InLineSettingItem.java
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+/*
+ * Copyright (C) 2011 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.camera.ui;
+
+import com.android.camera.R;
+import com.android.camera.ListPreference;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+/**
+ * A one-line camera setting could be one of three types: knob, switch or restore
+ * preference button. The setting includes a title for showing the preference
+ * title which is initialized in the SimpleAdapter. A knob also includes
+ * (ex: Picture size), a previous button, the current value (ex: 5MP),
+ * and a next button. A switch, i.e. the preference RecordLocationPreference,
+ * has only two values on and off which will be controlled in a switch button.
+ * Other setting popup window includes several InLineSettingItem items with
+ * different types if possible.
+ */
+public abstract class InLineSettingItem extends LinearLayout {
+    protected Context mContext;
+    private Listener mListener;
+    protected ListPreference mPreference;
+    protected int mIndex;
+    // Scene mode can override the original preference value.
+    protected String mOverrideValue;
+
+    static public interface Listener {
+        public void onSettingChanged();
+    }
+
+    public InLineSettingItem(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mContext = context;
+    }
+
+    protected void setTitle(ListPreference preference) {
+        ((TextView) findViewById(R.id.title)).setText(preference.getTitle());
+    }
+
+    public void initialize(ListPreference preference) {
+        setTitle(preference);
+        if (preference == null) return;
+        mPreference = preference;
+        reloadPreference();
+    }
+
+    protected abstract void updateView();
+
+    protected boolean changeIndex(int index) {
+        mIndex = index;
+        mPreference.setValueIndex(mIndex);
+        if (mListener != null) {
+            mListener.onSettingChanged();
+        }
+        updateView();
+        return true;
+    }
+
+    // The value of the preference may have changed. Update the UI.
+    public void reloadPreference() {
+        mIndex = mPreference.findIndexOfValue(mPreference.getValue());
+        updateView();
+    }
+
+    public void setSettingChangedListener(Listener listener) {
+        mListener = listener;
+    }
+
+    public void overrideSettings(String value) {
+        mOverrideValue = value;
+        updateView();
+    }
+}