Android TabHost用法詳解

最近研究了一下Contacts源碼，仿照上面自己寫了一個TabHostTest程序，現整理如下：

main.xml布局文件：

1. <?xml version="1.0" encoding="utf-8"?>
2. <TabHost xmlns:Android="http://schemas.android.com/apk/res/android"
3. android:id="@android:id/tabhost"
4. android:layout_width="match_parent"
5. android:layout_height="match_parent">
7. <LinearLayout
8. android:orientation="vertical"
9. android:layout_width="match_parent"
10. android:layout_height="match_parent">
12. <TabWidget android:id="@android:id/tabs"
13. android:layout_width="match_parent"
14. android:layout_height="wrap_content"
15. />
17. <FrameLayout android:id="@android:id/tabcontent"
18. android:layout_width="match_parent"
19. android:layout_height="0dip"
20. android:layout_weight="1"
21. />
22. </LinearLayout>
23. </TabHost>

inner.xml文件：

1. <?xml version="1.0" encoding="utf-8"?>
3. <TabHost xmlns:android="http://schemas.android.com/apk/res/android"
4. android:id="@android:id/tabhost"
5. android:layout_width="match_parent"
6. android:layout_height="match_parent">
8. <LinearLayout
9. android:orientation="vertical"
10. android:layout_width="match_parent"
11. android:layout_height="match_parent">
12. s
13. <FrameLayout android:id="@android:id/tabcontent"
14. android:layout_width="fill_parent"
15. android:layout_height="0dip"
16. android:layout_weight="1"
17. />
19. <TabWidget android:id="@android:id/tabs"
20. android:layout_width="fill_parent"
21. android:layout_height="wrap_content"
22. />
25. </LinearLayout>
26. </TabHost>

Main.java （主Activity類）：

1. package com.android.test;
3. import android.app.Activity;
4. import android.app.TabActivity;
5. import android.content.Intent;
6. import android.os.Bundle;
7. import android.provider.CallLog.Calls;
8. import android.provider.Contacts.Intents.UI;
9. import android.view.Window;
10. import android.widget.TabHost;
12. public class Main extends TabActivity implements TabHost.OnTabChangeListener {
13. private static final int TAB_INDEX_DIALER = 0;
14. private static final int TAB_INDEX_CALL_LOG = 1;
15. private static final int TAB_INDEX_CONTACTS = 2;
16. private static final int TAB_INDEX_FAVORITES = 3;
18. private TabHost mTabHost;
20. @Override
21. public void onCreate(Bundle savedInstanceState) {
22. super.onCreate(savedInstanceState);
24. final Intent intent = getIntent();
26. requestWindowFeature(Window.FEATURE_NO_TITLE);
28. setContentView(R.layout.main);
30. mTabHost = getTabHost();
31. mTabHost.setOnTabChangedListener(this);
33. // Setup the tabs
34. setupDialerTab();
35. setupCallLogTab();
36. setupContactsTab();
37. setupFavoritesTab();
39. setCurrentTab(intent);
40. }
42. public void onTabChanged(String tabId) {
43. Activity activity = getLocalActivityManager().getActivity(tabId);
44. if (activity != null) {
45. activity.onWindowFocusChanged(true);
46. }
47. }
48. private void setupCallLogTab() {
49. // Force the class since overriding tab entries doesn't work
50. Intent intent = new Intent("com.android.phone.action.RECENT_CALLS");
52. intent.setClass(this, Inner.class);
53. mTabHost.addTab(mTabHost.newTabSpec("call_log")
54. .setIndicator("通話記錄",
55. getResources().getDrawable(R.drawable.ic_tab_unselected_recent))
56. .setContent(intent));
57. }
59. private void setupDialerTab() {
60. Intent intent = new Intent("com.android.phone.action.TOUCH_DIALER");
61. intent.setClass(this, Inner.class);
63. mTabHost.addTab(mTabHost.newTabSpec("dialer")
64. .setIndicator("撥號",
65. getResources().getDrawable(R.drawable.ic_tab_unselected_dialer))
66. .setContent(intent));
67. }
69. private void setupContactsTab() {
70. Intent intent = new Intent(UI.LIST_DEFAULT);
71. intent.setClass(this, Main.class);
73. mTabHost.addTab(mTabHost.newTabSpec("contacts")
74. .setIndicator("通訊錄",
75. getResources().getDrawable(R.drawable.ic_tab_unselected_contacts))
76. .setContent(intent));
77. }
79. private void setupFavoritesTab() {
80. Intent intent = new Intent(UI.LIST_STREQUENT_ACTION);
81. intent.setClass(this, Inner.class);
83. mTabHost.addTab(mTabHost.newTabSpec("favorites")
84. .setIndicator("收藏",
85. getResources().getDrawable(R.drawable.ic_tab_unselected_starred))
86. .setContent(intent));
87. }
89. /**
90. * Sets the current tab based on the intent's request type
91. *
92. * @param intent Intent that contains information about which tab should be selected
93. */
94. private void setCurrentTab(Intent intent) {
95. // Dismiss menu provided by any children activities
96. Activity activity = getLocalActivityManager().
97. getActivity(mTabHost.getCurrentTabTag());
98. if (activity != null) {
99. activity.closeOptionsMenu();
100. }
102. // Tell the children activities that they should ignore any possible saved
103. // state and instead reload their state from the parent's intent
104. intent.putExtra("", true);
106. // Choose the tab based on the inbound intent
107. String componentName = intent.getComponent().getClassName();
108. if (getClass().getName().equals(componentName)) {
109. if (false) {
110. //in a call, show the dialer tab(which allows going back to the call)
111. mTabHost.setCurrentTab(TAB_INDEX_DIALER);
112. } else if ((intent.getFlags() & Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY) != 0) {
113. // launched from history (long-press home) --> nothing to change
114. } else if (true) {
115. // The dialer was explicitly requested
116. mTabHost.setCurrentTab(TAB_INDEX_DIALER);
117. }
118. }
119. }
120. }

Inner.java類：

1. package com.android.test;
3. import android.app.TabActivity;
4. import android.content.Intent;
5. import android.os.Bundle;
6. import android.view.Window;
7. import android.widget.TabHost;
8. import android.widget.TabWidget;
9. import android.widget.TextView;
11. public class Inner extends TabActivity implements TabHost.OnTabChangeListener {
12. private static final int TAB_INDEX_ALL = 0;
13. private static final int TAB_INDEX_MISSED = 1;
14. private static final int TAB_INDEX_OUTGOING = 2;
15. private static final int TAB_INDEX_RECEIVED = 3;
17. private TabHost mTabHost;
18. private TabWidget mTabWidget;
20. @Override
21. public void onCreate(Bundle savedInstanceState) {
22. super.onCreate(savedInstanceState);
23. requestWindowFeature(Window.FEATURE_NO_TITLE);
24. setContentView(R.layout.inner);
26. mTabHost = getTabHost();
27. mTabHost.setOnTabChangedListener(this);
29. setupTabs();
30. mTabWidget = mTabHost.getTabWidget();
31. mTabWidget.setStripEnabled(false);
33. for (int i = 0; i < mTabWidget.getChildCount(); i++) {
35. TextView tv = (TextView) mTabWidget.getChildAt(i).findViewById(
36. android.R.id.title);
37. tv.setTextColor(this.getResources().getColorStateList(
38. android.R.color.white));
40. tv.setPadding(0, 0, 0,(int) tv.getTextSize());
41. tv.setText("Tab" + i);
42. mTabWidget.getChildAt(i).getLayoutParams().height =(int ) (3* tv.getTextSize());
44. mTabWidget.getChildAt(i).setBackgroundResource(R.drawable.tab_bg);
45. }
46. }
48. public void onTabChanged(String tabId) {
50. }
52. private void setupTabs() {
53. mTabHost.addTab(mTabHost.newTabSpec("all").setIndicator(
54. getString(R.string.inner)).setContent(
55. new Intent(this, Other.class)));
56. mTabHost.addTab(mTabHost.newTabSpec("Missed").setIndicator(
57. getString(R.string.inner)).setContent(
58. new Intent(this, Other.class)));
59. mTabHost.addTab(mTabHost.newTabSpec("Outgoing").setIndicator(
60. getString(R.string.inner)).setContent(
61. new Intent(this, Other.class)));
62. mTabHost.addTab(mTabHost.newTabSpec("Received").setIndicator(
63. getString(R.string.inner)).setContent(
64. new Intent(this, Other.class)));
66. }
67. }

效果圖如下：

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