@Override

protected void onCreate(Bundle savedInstanceState) {

Trace.beginSection(TAG + " onCreate");

super.onCreate(savedInstanceState);

mFirstLaunch = true;//首次launch标志

final Resources resources = getResources();

mActionBarHeight = resources.getDimensionPixelSize(R.dimen.action_bar_height_large);//获取高度

Trace.beginSection(TAG + " setContentView");

setContentView(R.layout.dialtacts_activity);//获得布局文件

Trace.endSection();

getWindow().setBackgroundDrawable(null);

//设置视图，actionBar即手机顶部的常驻空间，供页面的切换或标识

Trace.beginSection(TAG + " setup Views");

final ActionBar actionBar = getActionBar();

actionBar.setCustomView(R.layout.search_edittext);//放入“搜索编辑框”

actionBar.setDisplayShowCustomEnabled(true);

actionBar.setBackgroundDrawable(null);

//搜索编辑框设计，首先同构ViewID找到控件

SearchEditTextLayout searchEditTextLayout =

(SearchEditTextLayout) actionBar.getCustomView().findViewById(R.id.search_view_container);

//猜测为输入时的智能提示

searchEditTextLayout.setPreImeKeyListener(mSearchEditTextLayoutListener);

//为这个搜索编辑框绑定控制器

mActionBarController = new ActionBarController(this, searchEditTextLayout);

//找到编辑控件

mSearchView = (EditText) searchEditTextLayout.findViewById(R.id.search_view);

//监听编辑框文字输入

mSearchView.addTextChangedListener(mPhoneSearchQueryTextListener);

//声控输入按钮

mVoiceSearchButton = searchEditTextLayout.findViewById(R.id.voice_search_button);

//放大镜，位于文本编辑控件的左侧，并绑定Listener

searchEditTextLayout.findViewById(R.id.search_magnifying_glass)

.setOnClickListener(mSearchViewOnClickListener);

//绑定开始查找按钮

searchEditTextLayout.findViewById(R.id.search_box_start_search)

.setOnClickListener(mSearchViewOnClickListener);

searchEditTextLayout.setOnClickListener(mSearchViewOnClickListener);

//为searchEditTextLayout绑定callBack

searchEditTextLayout.setCallback(new SearchEditTextLayout.Callback() {

//返回上一次搜索

@Override

public void onBackButtonClicked() {

onBackPressed();

}

@Override

public void onSearchViewClicked() {

//Floating action button (FAB)是一个带有环状阴影的圆形按键，位于 UI之上，用//于显示常用的操作，比如添加新条目、编写邮件等。

// 当键盘显示时隐藏FAB

mFloatingActionButtonController.scaleOut();

}

});

mIsLandscape = getResources().getConfiguration().orientation

== Configuration.ORIENTATION_LANDSCAPE;

//获取floatingActionButton的容器

final View floatingActionButtonContainer = findViewById(

R.id.floating_action_button_container);

//获取floatingActionButton

ImageButton floatingActionButton = (ImageButton) findViewById(R.id.floating_action_button);

//监听floatingActionButton

floatingActionButton.setOnClickListener(this);

//floatingActionButton控制，由于FAB是浮动的因此需要限定范围，并加以控制

mFloatingActionButtonController = new FloatingActionButtonController(this,

floatingActionButtonContainer, floatingActionButton);

//通过监听者都是this，猜测应该就是floatingActionButton

ImageButton optionsMenuButton =

(ImageButton) searchEditTextLayout.findViewById(R.id.dialtacts_options_menu_button);

optionsMenuButton.setOnClickListener(this);

//为搜索添加设置菜单

mOverflowMenu = buildOptionsMenu(searchEditTextLayout);

//绑定监听者

optionsMenuButton.setOnTouchListener(mOverflowMenu.getDragToOpenListener());

//此处猜测为常用联系人

// Add the favorites fragment but only if savedInstanceState is null. Otherwise the

// fragment manager is responsible for recreating it.

if (savedInstanceState == null) {

getFragmentManager().beginTransaction()

.add(R.id.dialtacts_frame, new ListsFragment(), TAG_FAVORITES_FRAGMENT)

.commit();

} else {

mSearchQuery = savedInstanceState.getString(KEY_SEARCH_QUERY);

mInRegularSearch = savedInstanceState.getBoolean(KEY_IN_REGULAR_SEARCH_UI);

mInDialpadSearch = savedInstanceState.getBoolean(KEY_IN_DIALPAD_SEARCH_UI);

mFirstLaunch = savedInstanceState.getBoolean(KEY_FIRST_LAUNCH);

mShowDialpadOnResume = savedInstanceState.getBoolean(KEY_IS_DIALPAD_SHOWN);

mActionBarController.restoreInstanceState(savedInstanceState);

}

final boolean isLayoutRtl = DialerUtils.isRtl();

//处理划屏动画加载，界面切换

if (mIsLandscape) {//左右滑屏为切换

mSlideIn = AnimationUtils.loadAnimation(this,

isLayoutRtl ? R.anim.dialpad_slide_in_left : R.anim.dialpad_slide_in_right);

mSlideOut = AnimationUtils.loadAnimation(this,

isLayoutRtl ? R.anim.dialpad_slide_out_left : R.anim.dialpad_slide_out_right);

} else {//上下滑屏为常驻返回等菜单显示与隐藏

mSlideIn = AnimationUtils.loadAnimation(this, R.anim.dialpad_slide_in_bottom);

mSlideOut = AnimationUtils.loadAnimation(this, R.anim.dialpad_slide_out_bottom);

}

mSlideIn.setInterpolator(AnimUtils.EASE_IN);

mSlideOut.setInterpolator(AnimUtils.EASE_OUT);

//绑定滑屏监听者，这样才能实现功能

mSlideIn.setAnimationListener(mSlideInListener);

mSlideOut.setAnimationListener(mSlideOutListener);

//拖拽处理

mParentLayout = (FrameLayout) findViewById(R.id.dialtacts_mainlayout);

mParentLayout.setOnDragListener(new LayoutOnDragListener());

floatingActionButtonContainer.getViewTreeObserver().addOnGlobalLayoutListener(

new ViewTreeObserver.OnGlobalLayoutListener() {

@Override

public void onGlobalLayout() {

final ViewTreeObserver observer =

floatingActionButtonContainer.getViewTreeObserver();

if (!observer.isAlive()) {

return;

}

observer.removeOnGlobalLayoutListener(this);

int screenWidth = mParentLayout.getWidth();

mFloatingActionButtonController.setScreenWidth(screenWidth);

mFloatingActionButtonController.align(

getFabAlignment(), false /* animate */);

}

});

Trace.endSection();

Trace.beginSection(TAG + " initialize smart dialing");

mDialerDatabaseHelper = DatabaseHelperManager.getDatabaseHelper(this);

SmartDialPrefix.initializeNanpSettings(this);

Trace.endSection();

Trace.endSection();

}

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/dialtacts_mainlayout"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:focusable="true"

android:focusableInTouchMode="true"

android:clipChildren="false"

android:background="@color/background_dialer_light">

<FrameLayout

android:id="@+id/dialtacts_container"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:clipChildren="false">

<!-- The main contacts grid -->

<FrameLayout

android:layout_height="match_parent"

android:layout_width="match_parent"

android:id="@+id/dialtacts_frame"

android:clipChildren="false" />

</FrameLayout>

<FrameLayout

android:id="@+id/floating_action_button_container"

android:background="@drawable/fab_blue"

android:layout_width="@dimen/floating_action_button_width"

android:layout_height="@dimen/floating_action_button_height"

android:layout_marginBottom="@dimen/floating_action_button_margin_bottom"

android:layout_gravity="center_horizontal|bottom">

<ImageButton

android:id="@+id/floating_action_button"

android:background="@drawable/floating_action_button"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:contentDescription="@string/action_menu_dialpad_button"

android:src="@drawable/fab_ic_dial"/>

</FrameLayout>

<!-- Host container for the contact tile drag shadow -->

<FrameLayout

android:id="@+id/activity_overlay"

android:layout_height="match_parent"

android:layout_width="match_parent">

<ImageView

android:id="@+id/contact_tile_drag_shadow_overlay"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:visibility="gone"

android:importantForAccessibility="no" />

</FrameLayout>

</FrameLayout>

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {

Trace.beginSection(TAG + " onCreateView");

Trace.beginSection(TAG + " inflate view");

//来自百度：在实际开发中LayoutInflater这个类还是非常有用的，它的作用类似于//findViewById()。不同点是LayoutInflater是用来找res/layout/下的xml布局文件，//并且实例化；而findViewById()是找xml布局文件下的具体widget控件(如Button、//TextView等)。具体作用： 1、对于一个没有被载入或者想要动态载入的界面，都需要使用//LayoutInflater.inflate()来载入；

final View fragmentView = inflater.inflate(R.layout.dialpad_fragment, container,

false);

Trace.endSection();

Trace.beginSection(TAG + " buildLayer");

fragmentView.buildLayer();

Trace.endSection();

Trace.beginSection(TAG + " setup views");

mDialpadView = (DialpadView) fragmentView.findViewById(R.id.dialpad_view);

mDialpadView.setCanDigitsBeEdited(true);

mDigits = mDialpadView.getDigits();

mDigits.setKeyListener(UnicodeDialerKeyListener.INSTANCE);

mDigits.setOnClickListener(this);//将自己设置为拨号按钮的监听者

mDigits.setOnKeyListener(this);//设置按键事件监听者

mDigits.setOnLongClickListener(this);

mDigits.addTextChangedListener(this);

mDigits.setElegantTextHeight(false);

PhoneNumberFormatter.setPhoneNumberFormattingTextWatcher(getActivity(), mDigits);

// 检查键盘的存在

View oneButton = fragmentView.findViewById(R.id.one);

if (oneButton != null) {//如果存在设定监听者

configureKeypadListeners(fragmentView);

}

//del键设置

mDelete = mDialpadView.getDeleteButton();

if (mDelete != null) {

mDelete.setOnClickListener(this);

mDelete.setOnLongClickListener(this);

}

//空格键设置

mSpacer = fragmentView.findViewById(R.id.spacer);

mSpacer.setOnTouchListener(new View.OnTouchListener() {

@Override

public boolean onTouch(View v, MotionEvent event) {

if (isDigitsEmpty()) {

if (getActivity() != null) {

return ((HostInterface) getActivity()).onDialpadSpacerTouchWithEmptyQuery();

}

return true;

}

return false;

}

});

mDigits.setCursorVisible(false);

// Set up the "dialpad chooser" UI; see showDialpadChooser().

mDialpadChooser = (ListView) fragmentView.findViewById(R.id.dialpadChooser);

mDialpadChooser.setOnItemClickListener(this);

//FAB设计

final View floatingActionButtonContainer =

fragmentView.findViewById(R.id.dialpad_floating_action_button_container);

final ImageButton floatingActionButton =

(ImageButton) fragmentView.findViewById(R.id.dialpad_floating_action_button);

floatingActionButton.setOnClickListener(this);

mFloatingActionButtonController = new FloatingActionButtonController(getActivity(),

floatingActionButtonContainer, floatingActionButton);

Trace.endSection();

Trace.endSection();

return fragmentView;

}