Android之TabHost 的选项卡布局
TabHost的实现有两种方式：
第一种继承TabActivity，从TabActivity中用getTabHost()方法获取TabHost。各个Tab中的内容在布局文件中定义就行了。
第二种方式，不继承TabActivity，在布局文件中定义TabHost即可，但是TabWidget的id必须是@android:id/tabs，FrameLayout的id必须是@android:id/tabcontent。
第一种方式:
1. 布局文件
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | <?xml version="1.0" encoding="utf-8"?> <!-- Copyright 2009 Joe LaPenna --> android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/home_gradient" android:orientation="vertical" > <TabHost android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent" > <!-- A paddingTop of zero will remove the strip below the tabs. --> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingBottom="60dip" /> <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" > <!-- android:background="#363636" --> <TabWidget android:background="@drawable/title_bg_night" android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="60dip" android:layout_alignParentBottom="true" android:tabStripEnabled="false" /> </RelativeLayout> </TabHost> </LinearLayout> |
2. 继承 TabActivity
1 2 3 | public class MainTabActivity extends TabActivity { private TabHost mTabHost; private LayoutInflater inflater; |
inflater = LayoutInflater.from(this); 从这个TabActivity获取LayoutInflater
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | @Override protected void onCreate(Bundle arg0) { super.onCreate(arg0); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main_tab); inflater = LayoutInflater.from(this); mTabHost = (TabHost) findViewById(android.R.id.tabhost); mTabHost.addTab(getTabSpec("mydouban", MeActivity.class, "我的豆瓣", R.drawable.tab_main_nav_me)); mTabHost.addTab(getTabSpec("newbook", NewBooksActivity.class, "新书", R.drawable.tab_main_nav_book)); mTabHost.addTab(getTabSpec("mydouban", MeActivity.class, "书评", R.drawable.detail_comment_selected)); mTabHost.addTab(getTabSpec("mydouban", SearchActivity.class, "搜索", R.drawable.tab_main_nav_search)); mTabHost.addTab(getTabSpec("mydouban", AboutActivity.class, "关于", R.drawable.tab_main_nav_more)); } private TabSpec getTabSpec(String tag, Class clazz, String name, int drawid) { TabSpec spec = mTabHost.newTabSpec(tag); // 指定显示内容 Intent intent = new Intent(this, clazz); spec.setContent(intent); // 设置标签的样式 spec.setIndicator(getIndicatorView(name, drawid)); return spec; } // 获取view对象 private View getIndicatorView(String name, int drawid) { View view = inflater.inflate(R.layout.tab_main_nav, null); ImageView ivicon = (ImageView) view.findViewById(R.id.ivIcon); TextView tvtitle = (TextView) view.findViewById(R.id.tvTitle); ivicon.setImageResource(drawid); tvtitle.setText(name); return view; } |
3.每个选项卡的布局文件
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | <?xml version="1.0" encoding="utf-8"?> android:id="@+id/tabMainNav" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/tab_main_nav_selector" android:gravity="center_horizontal" android:orientation="vertical" > <ImageView android:id="@+id/ivIcon" android:layout_width="30dip" android:layout_height="30dip" android:layout_marginBottom="1dip" android:layout_marginTop="5dip" android:scaleType="fitXY" /> <TextView android:id="@+id/tvTitle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="5dip" android:textAppearance="@style/TextViewStyleTabMainNav" android:textSize="14dip" /> </LinearLayout> |
第二 种方式:
不继承TabActivity
继承普通Activity，<TabWidget>标签id必须为tabs、<FrameLayout>标签id必须为tabcontent.这个方式在通过findViewById获得TabHost之后，必须要调用setup方法。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | <?xml version="1.0" encoding="utf-8"?> <!-- TabHost必须包含一个 TabWidget和一个FrameLayout--> <TabHost android:id="@+id/tabhost" android:layout_width="fill_parent" android:layout_height="wrap_content"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- TabWidget的id属性必须为 @android:id/tabs--> <TabWidget android:id="@android:id/tabs" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <!-- FrameLayout的id属性必须为 @android:id/tabcontent--> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/view1" android:layout_width="fill_parent" android:layout_height="fill_parent"/> <TextView android:id="@+id/view2" android:layout_width="fill_parent" android:layout_height="fill_parent"/> <TextView android:id="@+id/view3" android:layout_width="fill_parent" android:layout_height="fill_parent"/> </FrameLayout> </LinearLayout> </TabHost> </LinearLayout> |
// 如果没有继承TabActivity时，通过该种方法加载启动tabHost
tabHost.setup();
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | public class TabHostTest extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // 获取TabHost对象 TabHost tabHost = (TabHost) findViewById(R.id.tabhost); // 如果没有继承TabActivity时，通过该种方法加载启动tabHost tabHost.setup(); tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("第一个标签", getResources().getDrawable(R.drawable.icon)).setContent( R.id.view1)); tabHost.addTab(tabHost.newTabSpec("tab3").setIndicator("第三个标签") .setContent(R.id.view3)); tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("第二个标签") .setContent(R.id.view2)); } } |
