TabHost两种实现方式

第一种：继承TabActivity，从TabActivity中用getTabHost()方法获取TabHost。只要定义具体Tab内容布局就行了.

xml布局：

1. <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
2. android:layout_width="fill_parent" android:layout_height="fill_parent">
3. <LinearLayout android:id="@+id/widget_layout_Blue"
4. android:layout_width="fill_parent" android:layout_height="fill_parent"
5. android:orientation="vertical" >
6. <EditText android:id="@+id/widget34" android:layout_width="fill_parent"
7. android:layout_height="wrap_content" android:text="EditText"
8. android:textSize="18sp">
9. </EditText>
10. <Button android:id="@+id/widget30" android:layout_width="wrap_content"
11. android:layout_height="wrap_content" android:text="Button">
12. </Button>
13. </LinearLayout>
14. <LinearLayout android:id="@+id/widget_layout_red"
15. android:layout_width="fill_parent" android:layout_height="fill_parent"
16. android:orientation="vertical" >
17. <AnalogClock android:id="@+id/widget36"
18. android:layout_width="wrap_content" android:layout_height="wrap_content">
19. </AnalogClock>
20. </LinearLayout>
21. <LinearLayout android:id="@+id/widget_layout_green"
22. android:layout_width="fill_parent" android:layout_height="fill_parent"
23. android:orientation="vertical">
24. <RadioGroup android:id="@+id/widget43"
25. android:layout_width="166px" android:layout_height="98px"
26. android:orientation="vertical">
27. <RadioButton android:id="@+id/widget44"
28. android:layout_width="wrap_content" android:layout_height="wrap_content"
29. android:text="RadioButton">
30. </RadioButton>
31. <RadioButton android:id="@+id/widget45"
32. android:layout_width="wrap_content" android:layout_height="wrap_content"
33. android:text="RadioButton">
34. </RadioButton>
35. </RadioGroup>
36. </LinearLayout>
37. </FrameLayout>
39. java代码：
40. super.onCreate(savedInstanceState);
41. myTabhost=this.getTabHost();
42. //get Tabhost
43. LayoutInflater.from(this).inflate(R.layout.main, myTabhost.getTabContentView(), true);
44. myTabhost.setBackgroundColor(Color.argb(150, 22, 70, 150));
46. myTabhost
47. .addTab(myTabhost.newTabSpec("One")// make a new Tab
48. .setIndicator("A")
49. // set the Title and Icon
50. .setContent(R.id.widget_layout_Blue));
51. // set the layout
53. myTabhost
54. .addTab(myTabhost.newTabSpec("Two")// make a new Tab
55. .setIndicator("B",
56. getResources().getDrawable(R.drawable.mumule))
57. // set the Title and Icon
58. .setContent(R.id.widget_layout_green));
59. // set the layout
61. myTabhost
62. .addTab(myTabhost.newTabSpec("Three")// make a new Tab
63. .setIndicator("C",
64. getResources().getDrawable(R.drawable.notepad))
65. // set the Title and Icon
66. .setContent(R.id.widget_layout_red));

第二种：不用继承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。TabHost的id可以自定义.

xml布局：

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/hometabs"
4. android:orientation="vertical"
5. android:layout_width="fill_parent"
6. android:layout_height="fill_parent">
7. <TabHost android:id="@+id/tabhost"
8. android:layout_width="wrap_content"
9. android:layout_height="wrap_content">
10. <LinearLayout
11. android:orientation="vertical"
12. android:layout_width="fill_parent"
13. android:layout_height="fill_parent">
15. <TabWidget android:id="@android:id/tabs"
16. android:orientation="horizontal"
17. android:layout_width="wrap_content"
18. android:layout_height="wrap_content">
19. </TabWidget>
21. <FrameLayout android:id="@android:id/tabcontent"
22. android:layout_width="wrap_content"
23. android:layout_height="wrap_content">
24. <TextView android:id="@+id/view1"
25. android:layout_width="fill_parent"
26. android:layout_height="fill_parent"/>
27. <TextView android:id="@+id/view2"
28. android:layout_width="fill_parent"
29. android:layout_height="fill_parent"/>
30. <TextView android:id="@+id/view3"
31. android:layout_width="fill_parent"
32. android:layout_height="fill_parent"/>
33. </FrameLayout>
35. </LinearLayout>
36. </TabHost>
37. </LinearLayout>
39. java代码：
40. protected void onCreate(Bundle savedInstanceState) {
41. super.onCreate(savedInstanceState);
42. setContentView(R.layout.hometabs);
44. TabHost tabHost = (TabHost) findViewById(R.id.tabhost);
45. tabHost.setup();
46. TabWidget tabWidget = tabHost.getTabWidget();
48. tabHost.addTab(tabHost.newTabSpec("tab1")
49. .setIndicator("tab1", getResources().getDrawable(R.drawable.mumule))
50. .setContent(R.id.view1));
52. tabHost.addTab(tabHost.newTabSpec("tab3")
53. .setIndicator("tab3")
54. .setContent(R.id.view3));
56. tabHost.addTab(tabHost.newTabSpec("tab2")
57. .setIndicator("tab2")
58. .setContent(R.id.view2));
60. final int tabs = tabWidget.getChildCount();
61. Log.i(TAG, "***tabWidget.getChildCount() : " + tabs);
63. final int tabWidth = 90;
64. final int tabHeight = 45;
66. for (int i = 0; i < tabs; i++) {
68. }
69. }