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：

<?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <TabWidget android:id="@android:id/tabs" android:layout_width="match_parent" android:layout_height="wrap_content" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="match_parent" android:layout_height="0dip" android:layout_weight="1" /> </LinearLayout> </TabHost>

inner.xml文件：

<?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> s <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1" /> <TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout> </TabHost>

Main.java （主Activity類）：

package com.android.test; import android.app.Activity; import android.app.TabActivity; import android.content.Intent; import android.os.Bundle; import android.provider.CallLog.Calls; import android.provider.Contacts.Intents.UI; import android.view.Window; import android.widget.TabHost; public class Main extends TabActivity implements TabHost.OnTabChangeListener { private static final int TAB_INDEX_DIALER = 0; private static final int TAB_INDEX_CALL_LOG = 1; private static final int TAB_INDEX_CONTACTS = 2; private static final int TAB_INDEX_FAVORITES = 3; private TabHost mTabHost; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); final Intent intent = getIntent(); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); mTabHost = getTabHost(); mTabHost.setOnTabChangedListener(this); // Setup the tabs setupDialerTab(); setupCallLogTab(); setupContactsTab(); setupFavoritesTab(); setCurrentTab(intent); } public void onTabChanged(String tabId) { Activity activity = getLocalActivityManager().getActivity(tabId); if (activity != null) { activity.onWindowFocusChanged(true); } } private void setupCallLogTab() { // Force the class since overriding tab entries doesn't work Intent intent = new Intent("com.android.phone.action.RECENT_CALLS"); intent.setClass(this, Inner.class); mTabHost.addTab(mTabHost.newTabSpec("call_log") .setIndicator("通話記錄", getResources().getDrawable(R.drawable.ic_tab_unselected_recent)) .setContent(intent)); } private void setupDialerTab() { Intent intent = new Intent("com.android.phone.action.TOUCH_DIALER"); intent.setClass(this, Inner.class); mTabHost.addTab(mTabHost.newTabSpec("dialer") .setIndicator("撥號", getResources().getDrawable(R.drawable.ic_tab_unselected_dialer)) .setContent(intent)); } private void setupContactsTab() { Intent intent = new Intent(UI.LIST_DEFAULT); intent.setClass(this, Main.class); mTabHost.addTab(mTabHost.newTabSpec("contacts") .setIndicator("通訊錄", getResources().getDrawable(R.drawable.ic_tab_unselected_contacts)) .setContent(intent)); } private void setupFavoritesTab() { Intent intent = new Intent(UI.LIST_STREQUENT_ACTION); intent.setClass(this, Inner.class); mTabHost.addTab(mTabHost.newTabSpec("favorites") .setIndicator("收藏", getResources().getDrawable(R.drawable.ic_tab_unselected_starred)) .setContent(intent)); } /** * Sets the current tab based on the intent's request type * * @param intent Intent that contains information about which tab should be selected */ private void setCurrentTab(Intent intent) { // Dismiss menu provided by any children activities Activity activity = getLocalActivityManager(). getActivity(mTabHost.getCurrentTabTag()); if (activity != null) { activity.closeOptionsMenu(); } // Tell the children activities that they should ignore any possible saved // state and instead reload their state from the parent's intent intent.putExtra("", true); // Choose the tab based on the inbound intent String componentName = intent.getComponent().getClassName(); if (getClass().getName().equals(componentName)) { if (false) { //in a call, show the dialer tab(which allows going back to the call) mTabHost.setCurrentTab(TAB_INDEX_DIALER); } else if ((intent.getFlags() & Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY) != 0) { // launched from history (long-press home) --> nothing to change } else if (true) { // The dialer was explicitly requested mTabHost.setCurrentTab(TAB_INDEX_DIALER); } } } }

Inner.java類：

package com.android.test; import android.app.TabActivity; import android.content.Intent; import android.os.Bundle; import android.view.Window; import android.widget.TabHost; import android.widget.TabWidget; import android.widget.TextView; public class Inner extends TabActivity implements TabHost.OnTabChangeListener { private static final int TAB_INDEX_ALL = 0; private static final int TAB_INDEX_MISSED = 1; private static final int TAB_INDEX_OUTGOING = 2; private static final int TAB_INDEX_RECEIVED = 3; private TabHost mTabHost; private TabWidget mTabWidget; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.inner); mTabHost = getTabHost(); mTabHost.setOnTabChangedListener(this); setupTabs(); mTabWidget = mTabHost.getTabWidget(); mTabWidget.setStripEnabled(false); for (int i = 0; i < mTabWidget.getChildCount(); i++) { TextView tv = (TextView) mTabWidget.getChildAt(i).findViewById( android.R.id.title); tv.setTextColor(this.getResources().getColorStateList( android.R.color.white)); tv.setPadding(0, 0, 0,(int) tv.getTextSize()); tv.setText("Tab" + i); mTabWidget.getChildAt(i).getLayoutParams().height =(int ) (3* tv.getTextSize()); mTabWidget.getChildAt(i).setBackgroundResource(R.drawable.tab_bg); } } public void onTabChanged(String tabId) { } private void setupTabs() { mTabHost.addTab(mTabHost.newTabSpec("all").setIndicator( getString(R.string.inner)).setContent( new Intent(this, Other.class))); mTabHost.addTab(mTabHost.newTabSpec("Missed").setIndicator( getString(R.string.inner)).setContent( new Intent(this, Other.class))); mTabHost.addTab(mTabHost.newTabSpec("Outgoing").setIndicator( getString(R.string.inner)).setContent( new Intent(this, Other.class))); mTabHost.addTab(mTabHost.newTabSpec("Received").setIndicator( getString(R.string.inner)).setContent( new Intent(this, Other.class))); } }

效果圖如下：