Android电话拨号UI分析

界面加载过程

DialtactsActivity.java

protected void onCreate(Bundle icicle) {this.setTheme(R.style.DialtactsTheme);super.onCreate(icicle);final Intent intent = getIntent();fixIntent(intent);//解析布局文件DialpadGlobals globals = DialpadGlobals.getGlobals(this);try {//得到mDialpadActivityView ---dialtacts_activity.xmlView view = globals.getDialpadActivityView();if(view != null){Log.d(TAG, "get view from application");setContentView(view);}else{tryToSetContentView();}} catch (Exception e) {tryToSetContentView();}mContactListFilterController = globals.getContactListFilterController();mContactListFilterController.addListener(mContactListFilterListener);View viewDialtacts = findViewById(R.id.dialtacts_frame);if (viewDialtacts != null && mFirstLayoutListener != null) {viewDialtacts.addOnLayoutChangeListener(mFirstLayoutListener);}//设置滚动页ViewPagesmViewPager = (ViewPager) findViewById(R.id.pager);if (mViewPager != null) {mViewPager.setAdapter(new ViewPagerAdapter(getFragmentManager()));if (mPageChangeListener != null) {mViewPager.setOnPageChangeListener(mPageChangeListener);}mViewPager.setOffscreenPageLimit(2);}//设置滚动页的tab标签属性int tabHeight = (int) getResources().getDimensionPixelSize(R.dimen.universe_ui_tab_height);Log.d(TAG,"tabHeight="+tabHeight);getActionBar().setAlternativeTabStyle(true);getActionBar().setTabHeight(tabHeight);getActionBar().setLogo(R.mipmap.ic_launcher_contacts);// Do same width calculation as ActionBar doesDisplayMetrics dm = getResources().getDisplayMetrics();int minCellSize = getResources().getDimensionPixelSize(R.dimen.fake_menu_button_min_width);int cellCount = dm.widthPixels / minCellSize;int fakeMenuItemWidth = dm.widthPixels / cellCount;if (DEBUG) Log.d(TAG, "The size of fake menu buttons (in pixel): " + fakeMenuItemWidth);//设置按钮mMenuButtonmMenuButton = findViewById(R.id.overflow_menu);if (mMenuButton != null) {mMenuButton.setMinimumWidth(fakeMenuItemWidth);if (ViewConfiguration.get(this).hasPermanentMenuKey()) {// This is required for dialpad button's layout, so must not use GONE here.mMenuButton.setVisibility(View.INVISIBLE);} else {mMenuButton.setOnClickListener(this);}}//设置按钮mSearchButtonmSearchButton = findViewById(R.id.searchButton);if (mSearchButton != null) {mSearchButton.setMinimumWidth(fakeMenuItemWidth);mSearchButton.setOnClickListener(this);}//添加Dialer、CallLog、Contacts、Favorites标签setupDialer();setupCallLog();if(UniverseUtils.UNIVERSEUI_SUPPORT){setupAllContacts();}setupFavorites();getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);getActionBar().setDisplayShowTitleEnabled(false);getActionBar().setDisplayShowHomeEnabled(false);// Load the last manually loaded tabmPrefs = PreferenceManager.getDefaultSharedPreferences(this);setCurrentTab(intent);if (UI.FILTER_CONTACTS_ACTION.equals(intent.getAction()) && icicle == null) {setupFilterText(intent);}if(UniverseUtils.UNIVERSEUI_SUPPORT){mViewPager.setVisibility(View.VISIBLE);}}

1.布局文件解析

在DialtactsActivity的onCreate函数中通过DialpadGlobals加载布局文件，以单例模式获取DialpadGlobals实例对象：

DialpadGlobals.java

public static DialpadGlobals getGlobals(Context context) {if (INSTANCE == null) {INSTANCE = new DialpadGlobals(context);}return INSTANCE;}

DialpadGlobals对象的构造过程：

private DialpadGlobals(Context context) {mContext = context;mInflater = LayoutInflater.from(context);Log.d(TAG, "The Optimization do not support UUI.");initGlobalsTouchLocal();initGlobalsNotTouchLocal();try {Class.forName("com.android.contacts.activities.DialtactsActivity");Class.forName("com.android.contacts.dialpad.DialpadFragment");Class.forName("com.android.contacts.calllog.CallLogFragment");} catch (ClassNotFoundException e) {e.printStackTrace();}IntentFilter filter = new IntentFilter();filter.addAction(Intent.ACTION_LOCALE_CHANGED);mContext.registerReceiver(mBroadcast, filter);}

函数首先加载各个布局文件，然后加载相应的类。

private void initGlobalsTouchLocal() {Resources resource = mContext.getResources();mDialpadActivityView = mInflater.inflate(R.layout.dialtacts_activity, null);mDialpadFragmentView = mInflater.inflate(R.layout.dialpad_list_fragment, null);mCaLLLogFragmentView = mInflater.inflate(R.layout.call_log_fragment, null);// pre load DialpadFragmentmCurrentCountryIso = ContactsUtils.getCurrentCountryIso(mContext);mProhibitedPhoneNumberRegexp = resource.getString(R.string.config_prohibited_phone_number_regexp);}

这样电话拨号界面就保存在DialpadGlobals类的成员mDialpadActivityView中，通过View view = globals.getDialpadActivityView()就可以得到拨号视图了。

dialtacts_activity.xml布局

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingTop="?android:attr/actionBarSize"    android:id="@+id/dialtacts_frame">    <android.support.v4.view.ViewPager        android:id="@+id/pager"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <ImageButton         android:id="@+id/searchButton"         android:layout_width="wrap_content"         android:layout_height="?android:attr/actionBarSize"         android:layout_gravity="bottom|left"         android:state_enabled="false"         android:background="?android:attr/selectableItemBackground"         android:contentDescription="@string/description_search_button"         android:src="@drawable/ic_dial_action_search"/>    <ImageButton         android:id="@+id/overflow_menu"         android:layout_width="wrap_content"         android:layout_height="?android:attr/actionBarSize"         android:layout_gravity="bottom|right"         android:src="@drawable/ic_menu_overflow"         android:contentDescription="@string/action_menu_overflow_description"         android:nextFocusLeft="@id/digits"         android:background="?android:attr/selectableItemBackground"/></FrameLayout>

2.滑动页监听设置

//设置滚动页ViewPagesmViewPager = (ViewPager) findViewById(R.id.pager);if (mViewPager != null) {mViewPager.setAdapter(new ViewPagerAdapter(getFragmentManager()));if (mPageChangeListener != null) {mViewPager.setOnPageChangeListener(mPageChangeListener);}mViewPager.setOffscreenPageLimit(2);}

滑动适配器

public class ViewPagerAdapter extends FragmentPagerAdapter {public ViewPagerAdapter(FragmentManager fm) {super(fm);}@Overridepublic Fragment getItem(int position) {switch (position) {//拨号界面case TAB_INDEX_DIALER_NEWUI:return new DialpadFragment();//联系人界面case TAB_INDEX_CONTACTS_NEWUI:mAllFragment = new DefaultContactBrowseListFragment();mAllFragment.mIsDisplayInDialer = true;return mAllFragment;//通话记录界面case TAB_INDEX_CALL_LOG_NEWUI:return new CallLogFragment();//收藏界面case TAB_INDEX_FAVORITES_NEWUI:return new PhoneFavoriteFragment();default:throw new IllegalStateException("No fragment at position " + position);}}@Overridepublic void setPrimaryItem(ViewGroup container, int position, Object object) {if (DEBUG) {Log.d(TAG, "FragmentPagerAdapter#setPrimaryItem(), position: " + position);}super.setPrimaryItem(container, position, object);}@Overridepublic int getCount() {if(UniverseUtils.UNIVERSEUI_SUPPORT){return TAB_INDEX_COUNT_NEWUI;} else {return TAB_INDEX_COUNT;}}}

各个视图类之间的关系图：

3.滑动标签设置

setupDialer();setupCallLog();setupAllContacts();setupFavorites();

拨号标签添加

private void setupDialer() {final Tab tab = getActionBar().newTab();LayoutInflater inflater = getLayoutInflater();  View view = inflater.inflate(R.layout.dialtacts_tab_new_ui, null);  ImageView dialView =  (ImageView)view.findViewById(R.id.tab_icon); if(dialView != null){dialView.setImageResource(R.drawable.ic_tab_dialer_newui);}TextView dialText = (TextView) view.findViewById(R.id.tab_text);if(dialText!=null){dialText.setText(R.string.dialerIconLabel);}tab.setCustomView(view);tab.setTabListener(mTabListener);getActionBar().addTab(tab);}

通话记录标签添加

private void setupCallLog() {final Tab tab = getActionBar().newTab();LayoutInflater inflater = getLayoutInflater();  View view = inflater.inflate(R.layout.dialtacts_tab_new_ui, null);  ImageView dialView =  (ImageView)view.findViewById(R.id.tab_icon); if(dialView != null){dialView.setImageResource(R.drawable.ic_tab_recent_newui);}TextView dialText = (TextView) view.findViewById(R.id.tab_text);if(dialText!=null){dialText.setText(R.string.recentCallsIconLabel);}tab.setCustomView(view);tab.setTabListener(mTabListener);getActionBar().addTab(tab);}

收藏标签添加

private void setupFavorites() {final Tab tab = getActionBar().newTab();LayoutInflater inflater = getLayoutInflater();  View view = inflater.inflate(R.layout.dialtacts_tab_new_ui, null);  ImageView dialView =  (ImageView)view.findViewById(R.id.tab_icon); if(dialView != null){dialView.setImageResource(R.drawable.ic_tab_starred_newui);}TextView dialText = (TextView) view.findViewById(R.id.tab_text);if(dialText!=null){dialText.setText(R.string.contactsFavoritesLabel);}tab.setCustomView(view);tab.setTabListener(mTabListener);getActionBar().addTab(tab);}

联系人标签添加

private void setupAllContacts() {final Tab tab = getActionBar().newTab();LayoutInflater inflater = getLayoutInflater();  View view = inflater.inflate(R.layout.dialtacts_tab_new_ui, null);  ImageView dialView =  (ImageView)view.findViewById(R.id.tab_icon); if(dialView != null){dialView.setImageResource(R.drawable.ic_tab_all_newui);}TextView dialText = (TextView) view.findViewById(R.id.tab_text);if(dialText!=null){dialText.setText(R.string.people);}tab.setCustomView(view);tab.setTabListener(mTabListener);getActionBar().addTab(tab);}

拨号界面

拨号视图加载过程：

DialpadFragment.java

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {//调用父类DialMatchFragment的onCreateViewView fragmentView = super.onCreateView(inflater ,container ,savedState);// Load up the resources for the text field.Resources r = getResources();mAdditionalButtonsRow = fragmentView.findViewById(R.id.dialpadAdditionalButtons);mDialpad = fragmentView.findViewById(R.id.dialpad_container);  // This is null in landscape mode.mDigitsContainer = fragmentView.findViewById(R.id.digits_container);mDigits = (EditText) fragmentView.findViewById(R.id.digits);if(mDigits != null){mDigits.setSingleLine();mDigits.setKeyListener(DialerKeyListener.getInstance());mDigits.setOnClickListener(this);mDigits.setOnKeyListener(this);mDigits.setOnLongClickListener(this);mDigits.addTextChangedListener(this);}...return fragmentView;}

父类DialMatchFragment的onCreateView函数实现

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {mView = inflateView(inflater, container);mListView = (ListView) mView.findViewById(android.R.id.list);if (mListView == null) {throw new RuntimeException("Your content must have a ListView whose id attribute is android.R.id.list'");}View emptyView = mView.findViewById(com.android.internal.R.id.empty);if (emptyView != null) {mListView.setEmptyView(emptyView);if (emptyView instanceof ContactListEmptyView) {mEmptyView = (ContactListEmptyView) emptyView;}}...return mView;}

调用该类的inflateView函数来加载布局，该函数在DialMatchFragment的子类中实现
DialpadFragment.java

protected View inflateView(LayoutInflater inflater, ViewGroup container) {DialpadGlobals globals = DialpadGlobals.getGlobals(getActivity());View view = globals.getDialpadFragmentView();if (view != null) {Log.d(TAG, "get view from application");return view;} else {return inflater.inflate(R.layout.dialpad_list_fragment, null);}}

DialpadFragment布局dialpad_list_fragment_ui.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/top"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:background="@android:color/transparent"    android:layout_alignParentTop="true"    android:paddingLeft="@dimen/dialpad_horizontal_margin"    android:paddingRight="@dimen/dialpad_horizontal_margin" >    <FrameLayout        android:id="@+id/showdial"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:layout_alignParentTop="true"        android:background="@android:color/transparent"        android:layout_marginBottom="59dip">        <include            android:id="@+id/account_filter_header_container"            layout="@layout/account_filter_header" />        <include layout="@layout/dialpad_add_contacts_newui"/>        <Viewandroid:id="@+id/dialpad_background"android:layout_width="match_parent"android:layout_height="match_parent"android:visibility="visible"android:background="@drawable/dialpad_list_bg_sprd"/>        <ListView            android:id="@android:id/list"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:layout_marginRight="?attr/contact_browser_list_padding_right"            android:layout_weight="1"            android:fadingEdge="none"            android:divider="@null"            android:paddingLeft="?attr/contact_browser_list_padding_left"            android:paddingTop="?attr/contact_browser_list_padding_left"            android:background="@drawable/dialpad_list_bg_sprd"            android:fastScrollEnabled="true" />        <ViewStub            android:id="@+id/footer_stub"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout="@layout/footer_panel" />        <LinearLayout            android:id="@+id/maindial"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:layout_marginTop="95dip"            android:layout_alignParentBottom="true"            android:background="@android:color/transparent"            android:orientation="vertical" >            <View                android:layout_width="match_parent"                android:layout_height="1dip"                android:background="@android:color/transparent" />            <!-- 按键部分 -->            <include layout="@layout/dialpad_new_ui" />            <!-- 拨号按钮 -->            <include layout="@layout/dialpad_additional_buttons_dial_new_ui" />        </LinearLayout>    </FrameLayout>    <ListView        android:id="@+id/dialpadChooser"        android:layout_width="match_parent"        android:background="@drawable/dialpad_list_bg_sprd"         android:layout_height="1dip"        android:layout_weight="1" /></LinearLayout>

 

account_filter_header.xml

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/account_filter_header_container"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical"    android:paddingTop="@dimen/list_header_extra_top_padding"    android:layout_marginLeft="@dimen/contact_browser_list_header_left_margin"    android:layout_marginRight="@dimen/contact_browser_list_header_right_margin"    android:background="?android:attr/selectableItemBackground"    android:visibility="gone">    <TextView        android:id="@+id/account_filter_header"        style="@style/ContactListSeparatorTextViewStyle"        android:paddingLeft="@dimen/contact_browser_list_item_text_indent" /></LinearLayout>

dialpad_add_contacts_newui.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/dialpadAddContactsButton"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:layout_gravity="center_horizontal"    android:background="@drawable/dialpad_list_bg_sprd"    android:orientation="horizontal" >    <RelativeLayout         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/addContactLayout"        android:clickable="true"        android:background="@drawable/call_add_contact_button_pressed_new_ui"        android:layout_gravity="center"        android:gravity="center"><TextViewandroid:layout_gravity="center"android:gravity="center"android:clickable="false"android:layout_width="wrap_content"android:layout_height="wrap_content"android:drawableLeft="@drawable/call_addcontract_icon_sprd"android:text="@string/create_new_contact"android:textSize="20sp" />    </RelativeLayout></RelativeLayout>

dialpad.xml 拨号盘

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/dialpad_container"    android:layout_width="match_parent"    android:layout_height="295dip"    android:background="@android:color/transparent"    android:orientation="vertical" >    <View        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:layout_alignParentTop="true"        android:layout_marginBottom="465dip"        android:background="@android:color/transparent"        android:clickable="false"        android:focusable="false" />    <SlidingDrawer        android:id="@+id/dialer_container"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_alignParentBottom="true"        android:layout_gravity="center_horizontal"        android:background="@android:color/transparent"        android:content="@+id/dialpad"        android:handle="@+id/handle" >        <View            android:id="@id/handle"            android:layout_width="fill_parent"            android:layout_height="0px"            android:background="@android:color/transparent"            android:clickable="false"            android:focusable="false" />        <LinearLayout            android:id="@id/dialpad"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:background="@drawable/call_number_bg_sprd"            android:orientation="vertical" >     <LinearLayoutandroid:id="@+id/digits_bkg"android:layout_width="match_parent"android:layout_height="72dip"android:background="@android:color/transparent"android:gravity="center" ><LinearLayoutandroid:id="@+id/digits_container"android:layout_width="match_parent"android:layout_height="72dip"android:background="@android:color/transparent"android:layout_weight="@integer/dialpad_layout_weight_digits"android:gravity="center" ><com.android.contacts.dialpad.DigitsEditTextandroid:id="@+id/digits"android:layout_width="0px"android:layout_height="72dip"android:layout_marginLeft="10dip"android:layout_weight="1"android:layout_marginTop="10dip"android:background="@android:color/transparent"android:gravity="center"android:maxLength="@integer/dialpad_max_number_length"android:nextFocusRight="@+id/overflow_menu"android:textAppearance="@style/DialtactsDigitsTextAppearance_new_ui"android:textColor="@android:color/black" /><ImageButtonandroid:id="@+id/deleteButton"android:layout_width="50dip"android:layout_height="72dip"android:layout_marginLeft="5dip"android:layout_marginTop="3dip"                android:layout_marginBottom="-7dip"android:layout_marginRight="10dip"android:background="@android:color/transparent"android:focusable="false"android:src="@drawable/delete_button_pressed_new_ui"/><ImageButtonandroid:id="@+id/overflow_menu"android:layout_width="54dip"android:layout_height="match_parent"android:layout_alignParentRight="true"android:background="?android:attr/selectableItemBackground"android:contentDescription="@*android:string/action_menu_overflow_description"android:nextFocusLeft="@id/digits"android:src="@drawable/ic_menu_overflow" /></LinearLayout></LinearLayout>            <TableLayout                android:layout_width="match_parent"                android:layout_height="223dip"                android:layout_gravity="center_horizontal"                android:layout_marginTop="@dimen/dialpad_vertical_margin"                android:background="@android:color/transparent"                android:layout_marginRight="4dip"                android:layout_marginLeft="4dip" >                <TableRow                    android:layout_height="54dip"                    android:layout_marginBottom="2dip"                    android:layout_weight="1" >                    <ImageButton                        android:id="@+id/one"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:contentDescription="@string/description_image_button_one"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_1_wht" />                                 <ImageButton                        android:id="@+id/two"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:contentDescription="@string/description_image_button_two"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_2_wht" />                    <ImageButton                        android:id="@+id/three"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:contentDescription="@string/description_image_button_three"                       android:background="@drawable/dial_num_pressed_new_ui"                        android:src="@drawable/dial_num_3_wht" />                </TableRow>                <TableRow                    android:layout_height="54dip"                    android:layout_marginBottom="2dip"                    android:layout_weight="1" >                    <ImageButton                        android:id="@+id/four"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:contentDescription="@string/description_image_button_four"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_4_wht" />                    <ImageButton                        android:id="@+id/five"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:contentDescription="@string/description_image_button_five"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_5_wht" />                    <ImageButton                        android:id="@+id/six"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:paddingLeft="4dip"                        android:contentDescription="@string/description_image_button_six"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:src="@drawable/dial_num_6_wht" />                </TableRow>                <TableRow                    android:layout_height="54dip"                    android:layout_marginBottom="2dip"                    android:layout_weight="1" >                    <ImageButton                        android:id="@+id/seven"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:contentDescription="@string/description_image_button_seven"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_7_wht" />                    <ImageButton                        android:id="@+id/eight"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:contentDescription="@string/description_image_button_eight"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_8_wht" />                    <ImageButton                        android:id="@+id/nine"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:contentDescription="@string/description_image_button_nine"                        android:src="@drawable/dial_num_9_wht" />                </TableRow>                <TableRow                    android:layout_height="54dip"                    android:layout_marginBottom="1dip"                    android:layout_weight="1" >                   <ImageButton                        android:id="@+id/star"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:contentDescription="@string/description_image_button_star"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_star_wht" />                    <ImageButton                        android:id="@+id/zero"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:contentDescription="@string/description_image_button_zero"                        android:layout_marginRight="2dip"                        android:src="@drawable/dial_num_0_wht"/>                    <ImageButton                        android:id="@+id/pound"                        style="@style/DialtactsDialpadButtonStyleNewUI"                        android:background="@drawable/dial_num_pressed_new_ui"                        android:contentDescription="@string/description_image_button_pound"                        android:src="@drawable/dial_num_pound_wht" />                </TableRow>            </TableLayout>        </LinearLayout>    </SlidingDrawer></RelativeLayout>

dialpad_additional_buttons_dial.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/dialpadAdditionalButtons"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_alignParentBottom="false"    android:layout_gravity="center_horizontal"    android:background="@android:color/transparent"        android:orientation="horizontal" >     <LinearLayout        android:layout_width="match_parent"        android:layout_height="54dip"        android:layout_alignParentBottom="true"        android:background="@android:color/transparent"        android:layout_marginTop="1dip"        android:layout_marginBottom="4dip"        android:layout_marginRight="4dip"        android:layout_marginLeft="3dip"        android:orientation="horizontal" >        <ImageButton            android:id="@+id/videoButton"            android:layout_width="match_parent"            android:layout_height="54dip"            android:layout_gravity="center_vertical"            android:layout_weight="1"            android:layout_marginRight="3dip"            android:contentDescription="@string/description_search_button"            android:src="@drawable/vt_button_pressed_new_ui"            android:background="@android:color/transparent"            android:scaleType="fitXY"            android:state_enabled="false" />        <ImageButton            android:id="@+id/dialButton"            android:layout_width="match_parent"            android:layout_height="54dip"            android:layout_gravity="center_vertical"            android:layout_weight="1"            android:contentDescription="@string/description_dial_button"            android:src="@drawable/call_button_pressed_new_ui"            android:scaleType="fitXY"            android:background="#00000000"            android:state_enabled="false" />        <ImageButton            android:id="@+id/showview"            android:state_enabled="true"            android:layout_width="match_parent"            android:layout_height="54dip"            android:layout_gravity="center_vertical"            android:layout_weight="1"            android:contentDescription="@string/description_delete_button"            android:layout_marginLeft="2dip"            android:src="@drawable/keypad_down_sprd"            android:scaleType="center"            android:background="@drawable/keypad_button_background_pressed_new_ui" />    </LinearLayout></LinearLayout>