public class ViewPagerAdapter extends FragmentPagerAdapter {public ViewPagerAdapter(FragmentManager fm) {super(fm);}@Override
public Fragment getItem(int position) {
switch (position) {case TAB_INDEX_DIALER:return new DialpadFragment();
case TAB_INDEX_CALL_LOG:
return new CallLogFragment();
case TAB_INDEX_FAVORITES:
return new PhoneFavoriteFragment();
case TAB_INDEX_CONTACTS:
return new PhoneFragment("phone");}
throw new IllegalStateException("No fragment at position " + position);
}

ViewPagerAdapter是构建整个DialtactsActivity界面的核心

protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
.......
setContentView(R.layout.dialtacts_activity);
.......
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(new ViewPagerAdapter(getFragmentManager()));
mViewPager.setOnPageChangeListener(mPageChangeListener);
mViewPager.setOffscreenPageLimit(2);
.......
}

我们可以发现mViewPager构建了整个DialtactActivity的界面核心

if(tab.getPosition() == TAB_INDEX_CONTACTS)
{if(mCallType.equals("NORMAL"))
{
mLastManuallySelectedFragment = 0;
Intent intent = new Intent();
intent.setClassName("com.android.contacts", "com.android.contacts.activities.PeopleActivity");
startActivity(intent);	
mPageChangeListener.setCurrentPosition(mLastManuallySelectedFragment);
finish();
}
.....}

通过它可以直接跳转PeopleActivity（如上图）中去

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
.......
fragmentView = inflater.inflate(R.layout.dialpad_fragment_sx, container, false);
......fragmentView = inflater.inflate(R.layout.dialpad_fragment, container, false);
.....
}

那么 我们就找到了整个DialpadFragement的布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android">
........
<span style="white-space:pre">	</span><com.mediatek.contacts.widget.DialpadAdditionalButtons/>//通话信息按钮
<span style="white-space:pre">	</span><View/>
<span style="white-space:pre">	</span><com.mediatek.contacts.widget.ButtonGridLayout/>//数字按键
<span style="white-space:pre">	</span><view/>
<span style="white-space:pre">	</span><listView/>//查询结果列表
<span style="white-space:pre">	</span><FrameLayout>
<span style="white-space:pre">		</span><com.android.contacts.dialpad.DigitsEditText/>//查询编辑框
<span style="white-space:pre">		</span><ImageButton/>//编辑框delete建
<span style="white-space:pre">	</span></FrameLayout>
<span style="white-space:pre">	</span><listView/>
<RelativeLayout/>

整体的布局框架如图，其中值得我们关注的就是DiapadAdditionalButtons和ButtonGirdLayout

好，接下来，我们继续前进

同样 ，在onCreateView()函数中

mAdditionalButtonsRow = fragmentView.findViewById(R.id.dialpadAdditionalButtons);

mDialButtonSim1 = mAdditionalButtonsRow.findViewById(R.id.dialButtonSim1);

mDialButtonSim2 = mAdditionalButtonsRow.findViewById(R.id.dialButtonSim2);

这里就不得不吐槽一下，国内的双卡双待真是坑爹啊

好了，不管，我们下一步

mDialButtonSim1.setOnClickListener(this);

mDialButtonSim2.setOnClickListener(this);

那么我们继续跟踪onClick（）或者onTouch()

case R.id.dialButton: {

........

keyPressed(KeyEvent.KEYCODE_CALL);

}

那么继续跟踪 keyPressed()

dialButtonPressed();(onTouch())

KeyPressed()

KeyEvent event = new KeyEvent(KeyEvent.ACTION_DOWN, keyCode);

mDigits.onKeyDown(keyCode, event);

dialButtonPressed()

public void dialButtonPressed() {
dialButtonPressedInner(mDigits.getText().toString(), Constants.DIAL_NUMBER_INTENT_NORMAL);
}

protected void dialButtonPressedInner(String number, int type,int id) {
.........
final Intent intent = ContactsUtils.getCallIntent(number,(getActivity() instanceof DialtactsActivity ?((DialtactsActivity) getActivity()).getCallOrigin() : null), type);
.......
mCallOptionHandler.doCallOptionHandle(intent);
......
}

同样，我们继续跟踪mCallOptionHandler = new ContactsCallOptionHandler(getActivity(),

接下来就会通过JRIL向系统层及硬件传递消息

那么  我们此次分析，到此结束