ApiDemos之ActionBarTab

转载请注明出处：http://blog.csdn.net/droyon/article/details/9452557

ActionBar可以加Tab，这也是我们经常使用的功能，在android提供的demos里面提供了测试例子。

我们来看一下效果：

关键代码：

添加Tab：

public void onAddTab(View v){final ActionBar bar = getActionBar();final int tabCount = bar.getTabCount();final String text = "Tab"+tabCount;bar.addTab(bar.newTab().setText(text).setTabListener(new TabListener(new TabContentFragment(text))));}

删除最后一个Tab（当然你也可以指定Tab）

public void onRemoveTab(View v){final ActionBar bar = getActionBar();bar.removeTabAt(bar.getTabCount()-1);}

切换ActionBar模式：

public void onToggleTabs(View v){final ActionBar bar = getActionBar();if(bar.getNavigationMode() == ActionBar.NAVIGATION_MODE_TABS){bar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);bar.setDisplayOptions(ActionBar.DISPLAY_SHOW_TITLE,ActionBar.DISPLAY_SHOW_TITLE);}else{bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);bar.setDisplayOptions(0,ActionBar.DISPLAY_SHOW_TITLE);}}

删除所有Tab

public void onRemoveAllTabs(View v){getActionBar().removeAllTabs();}

部分详细代码：

action_bar_tabs.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:orientation="vertical">    <FrameLayout android:id="@+id/fragment_content"                 android:layout_width="match_parent"                 android:layout_height="0dip"                 android:layout_weight="1" />    <LinearLayout android:layout_width="match_parent"                  android:layout_height="0dip"                  android:layout_weight="1"                  android:orientation="vertical">        <Button android:id="@+id/btn_add_tab"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@string/btn_add_tab"                android:onClick="onAddTab" />        <Button android:id="@+id/btn_remove_tab"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@string/btn_remove_tab"                android:onClick="onRemoveTab" />        <Button android:id="@+id/btn_toggle_tabs"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@string/btn_toggle_tabs"                android:onClick="onToggleTabs" />        <Button android:id="@+id/btn_remove_all_tabs"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@string/btn_remove_all_tabs"                android:onClick="onRemoveAllTabs" />    </LinearLayout></LinearLayout>

action_bar_tab_content.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"          android:id="@+id/text"          android:layout_width="wrap_content"          android:layout_height="wrap_content" />

ActionBarTab.java

package com.android.myapp;import android.app.ActionBar;import android.app.ActionBar.Tab;import android.app.Activity;import android.app.Fragment;import android.app.FragmentTransaction;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import android.widget.Toast;public class ActionBarTab extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.action_bar_tabs);getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);}public void onAddTab(View v){final ActionBar bar = getActionBar();final int tabCount = bar.getTabCount();final String text = "Tab"+tabCount;bar.addTab(bar.newTab().setText(text).setTabListener(new TabListener(new TabContentFragment(text))));}public void onRemoveTab(View v){final ActionBar bar = getActionBar();bar.removeTabAt(bar.getTabCount()-1);}public void onToggleTabs(View v){final ActionBar bar = getActionBar();if(bar.getNavigationMode() == ActionBar.NAVIGATION_MODE_TABS){bar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);bar.setDisplayOptions(ActionBar.DISPLAY_SHOW_TITLE,ActionBar.DISPLAY_SHOW_TITLE);}else{bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);bar.setDisplayOptions(0,ActionBar.DISPLAY_SHOW_TITLE);}}public void onRemoveAllTabs(View v){getActionBar().removeAllTabs();}private class TabListener implements ActionBar.TabListener{private TabContentFragment mFragment;public TabListener (TabContentFragment fragment){mFragment = fragment;}@Overridepublic void onTabSelected(Tab tab, FragmentTransaction ft) {ft.add(R.id.fragment_content, mFragment,null);}@Overridepublic void onTabUnselected(Tab tab, FragmentTransaction ft) {ft.remove(mFragment);}@Overridepublic void onTabReselected(Tab tab, FragmentTransaction ft) {Toast.makeText(ActionBarTab.this, "Reselected", Toast.LENGTH_LONG).show();}}private class TabContentFragment extends Fragment {private String mText;public TabContentFragment(String text){mText = text;}public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle saveInstance){View fragView = inflater.inflate(R.layout.action_bar_tab_content, container, false);TextView text = (TextView)fragView.findViewById(R.id.text);text.setText(mText);return fragView;}}}