Android TabHost组件使用方法详解

最近研究了一下Contacts源码，仿照上面自己写了一个TabHostTest程序，现整理如下：

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">

<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类）：

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("通话记录",
      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("拨号",
     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("通讯录",
     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类：

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)));

}
}

效果图如下：