Timepicker textcolor问题

Question

我有这个奇怪的错误，我弹出对话框，要求用户在tabview中输入日期和时间。 datepicker工作正常，但是timepicker在白色背景上显示白色文字，几乎看不见。

这是我的tabview代码。

TabHost tabHost = (TabHost) timerDialog.findViewById(android.R.id.tabhost);
    tabHost.setup();

    final TabWidget tabWidget = tabHost.getTabWidget();
    final FrameLayout tabContent = tabHost.getTabContentView();
    TextView[] originalTextViews = new TextView[tabWidget.getTabCount()];

    for (int index = 0; index < tabWidget.getTabCount(); index++) 
    {
        originalTextViews[index] = (TextView) tabWidget.getChildTabViewAt(index);
    }
    tabWidget.removeAllViews();

    for (int index = 0; index < tabContent.getChildCount(); index++) 
    {
        tabContent.getChildAt(index).setVisibility(View.GONE);
    }

    for (int index = 0; index < originalTextViews.length; index++) 
    {
        final TextView tabWidgetTextView = originalTextViews[index];
        final View tabContentView = tabContent.getChildAt(index);
        TabSpec tabSpec = tabHost.newTabSpec((String) tabWidgetTextView.getTag());

        tabSpec.setContent(new TabContentFactory() 
        {
                @Override
                public View createTabContent(String tag) 
                {
                        Calendar c = Calendar.getInstance();
                        c.setTimeInMillis(System.currentTimeMillis());
                        ((TimePicker)tabContentView).setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
                        ((TimePicker)tabContentView).setCurrentMinute(c.get(Calendar.MINUTE));
                        return tabContentView;
                }

            });
        if (tabWidgetTextView.getBackground() == null) 
        {
            tabSpec.setIndicator(tabWidgetTextView.getText());
        } 
        else 
        {
            tabSpec.setIndicator(tabWidgetTextView.getText(), tabWidgetTextView.getBackground());
        }
        tabHost.addTab(tabSpec);
    }
    AlertDialog timer = timerAlert.create();
    timer.show();
    timer.setOnDismissListener(new OnDismissListener() 
    {   
        @Override
        public void onDismiss(DialogInterface arg0) 
        {
            if(isSaveClicked)
            {
                TimePicker startTime = (TimePicker) timerDialog.findViewById(R.id.startTimePicker);
                TimePicker endTime = (TimePicker) timerDialog.findViewById(R.id.endTimePicker);

                 int eHour   = endTime.getCurrentHour();
                 int eMinute = endTime.getCurrentMinute();

                 int sHour   = startTime.getCurrentHour();
                 int sMinute = startTime.getCurrentMinute();

                 Calendar startCal = Calendar.getInstance();
                 Calendar endCal = Calendar.getInstance();

                 startCal.set(Calendar.HOUR_OF_DAY, sHour);
                 startCal.set(Calendar.MINUTE, sMinute);

                 endCal.set(Calendar.HOUR_OF_DAY, eHour);
                 endCal.set(Calendar.MINUTE, eMinute);

                 Log.d("silencer","start"+startCal.getTimeInMillis()+" end "+endCal.getTimeInMillis());
                 if(startCal.getTimeInMillis()>endCal.getTimeInMillis()||startCal.getTimeInMillis()==endCal.getTimeInMillis())
                 {
                     Toast.makeText(MainActivity.this, "Start time must be less then end time.", Toast.LENGTH_LONG).show();
                 }
                 else
                 ba.updateOrInsertSilence(startCal.getTimeInMillis(), endCal.getTimeInMillis(), MainActivity.this,1);
            }
       }
    });

和Xml文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

  <TabHost
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >

            <TextView
            android:tag="Start"
            android:text="Start Time"
            android:textColor="@color/blue"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            />
        <TextView
            android:tag="End"
            android:text="End Time"
            android:textColor="@color/blue"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            />
        </TabWidget>

        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >
             <TimePicker 
                 android:id="@+id/startTimePicker"
                 android:layout_width="fill_parent"
                 android:layout_height="wrap_content"
                 style="@android:style/Theme.Light"/>
             <TimePicker
                    android:id="@+id/endTimePicker"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content" 
                     style="@android:style/Theme.Light"/>

       </FrameLayout>
    </LinearLayout>
 </TabHost>



</LinearLayout>

有关如何将颜色设置为黑色的想法吗？