打开源码中CheckBox.java文件,我们可以看到如下内容: public class CheckBox extends CompoundButton { public CheckBox(Context context) { this(context, null); } public CheckBox(Context context, AttributeSet attrs) { this(context, attrs, com.android.internal.R.attr.checkboxStyle); } public CheckBox(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } } 可以看到,CheckBox是继承于CompoundButton,而CompoundButton: public abstract class CompoundButton extends Button implements Checkable 是Button的一个子类,由此可知,CheckBox也为Button的一个子类。从上面的代码中可以看出,CheckBox的不同之处就是添加了属性checkboxStyle,我们在源码中找到该样式的定义如下: <style name="Widget.CompoundButton.CheckBox"> <item name="android:background">@android:drawable/btn_check_label_background</item> <item name="android:button">@android:drawable/btn_check</item> </style> 其中,在资源文件中找到btn_check_label_background,该图片是背景透明没有内容的一张图片,因此CheckBox的显示就是由btn_check决定,我们打开btn_check.xml文件,可以看到以下内容: <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- Enabled states --> <item android:state_checked="true" android:state_window_focused="false" android:state_enabled="true" android:drawable="@drawable/btn_check_on" /> <item android:state_checked="false" android:state_window_focused="false" android:state_enabled="true" android:drawable="@drawable/btn_check_off" /> <item android:state_checked="true" android:state_pressed="true" android:state_enabled="true" android:drawable="@drawable/btn_check_on_pressed" /> <item android:state_checked="false" android:state_pressed="true" android:state_enabled="true" android:drawable="@drawable/btn_check_off_pressed" /> <item android:state_checked="true" android:state_focused="true" android:state_enabled="true" android:drawable="@drawable/btn_check_on_selected" /> <item android:state_checked="false" android:state_focused="true" android:state_enabled="true" android:drawable="@drawable/btn_check_off_selected" /> <item android:state_checked="false" android:state_enabled="true" android:drawable="@drawable/btn_check_off" /> <item android:state_checked="true" android:state_enabled="true" android:drawable="@drawable/btn_check_on" /> <!-- Disabled states --> <item android:state_checked="true" android:state_window_focused="false" android:drawable="@drawable/btn_check_on_disable" /> <item android:state_checked="false" android:state_window_focused="false" android:drawable="@drawable/btn_check_off_disable" /> <item android:state_checked="true" android:state_focused="true" android:drawable="@drawable/btn_check_on_disable_focused" /> <item android:state_checked="false" android:state_focused="true" android:drawable="@drawable/btn_check_off_disable_focused" /> <item android:state_checked="false" android:drawable="@drawable/btn_check_off_disable" /> <item android:state_checked="true" android:drawable="@drawable/btn_check_on_disable" /> </selector> 每一个item就对应着CheckBox在不同的选择状态下显示的效果,了解该文件的内容后,我们就可以更具自己的需要来设计美观的CheckBox。RadioButton的显示与CheckBox基本相似,可以仿照CheckBox加以修改。
转载:
http://blog.csdn.net/zhll3377/article/details/7287124
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->1.制作4个9patch的tab样式,可参考android默认的资源 tab_unselected.9.png tab_selected.9.pngtab_press.9.pngtab_focus.9.png 这4个资源分别代表Tab的4种状态。 .定义Tab的selector样式(就叫它tab_indicator.xml好了),将其放入drawable文件夹下,代码如下: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- Non focused states --> <item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_unselected" /> <item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/tab_selected" /> <!-- Focused states --> <item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_focus" /> <item android:state_focused="true" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/tab_focus" /> <!-- Pressed --> <item android:state_pressed="true" android:drawable="@drawable/tab_press" /> </selector> .编写indicator的布局文件(不妨也叫tab_indicator.xml),将其放入layout文件夹下,代码如下: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="0dip" android:layout_height="64dip" android:layout_weight="1" android:layout_marginLeft="-3dip" android:layout_marginRight="-3dip" android:orientation="vertical" android:background="@drawable/tab_indicator"> <ImageView android:id="@+id/icon" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" /> <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" style="?android:attr/tabWidgetStyle" mce_style="?android:attr/tabWidgetStyle" /> .接下来就是在TabActivity中使用我们自己编写的Tab样式了: // 首先获取TabWidget mTabHost = getTabHost(); LinearLayout ll = (LinearLayout)mTabHost.getChildAt(0); TabWidget tw = (TabWidget)ll.getChildAt(0); 然后用类似如下代码创建TabSpec,就大功告成了。 RelativeLayout tabIndicator1 = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.tab_indicator, tw, false); TextView tvTab1 = (TextView)tabIndicator1.getChildAt(1); tvTab1.setText("tab1"); mTabHot = mTabHost.newTabSpec("TAB_1") .setIndicator(tabIndicator1) .setContent(contentIntent);
http://www.cnblogs.com/tt_mc/archive/2010/10/07/1845090.html