Android入门之ActionBar实现Tab导航

效果图：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="jk.actionbartab"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="11"        android:targetSdkVersion="17" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="jk.actionbartab.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="action_settings">Settings</string>    <string name="app_name">Tab导航</string>    <string name="title_activity_main">ActionBar的Tab导航</string>    <string name="personal_page">个人</string>    <string name="query_page">查询</string>    <string name="pay_page">支付</string></resources>

MainActivity.java

package jk.actionbartab;import jk.actionbartab.R;import android.app.ActionBar;import android.app.Activity;import android.app.Fragment;import android.app.FragmentTransaction;import android.os.Bundle;public class MainActivity extends Activity implements ActionBar.TabListener {private static final String SELECTED_ITEM = "selected_item";public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);final ActionBar actionBar = getActionBar();// 设置ActionBar的导航方式：Tab导航actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);// 依次添加3个Tab页，并为3个Tab标签添加事件监听器actionBar.addTab(actionBar.newTab().setText(R.string.personal_page).setTabListener(this));actionBar.addTab(actionBar.newTab().setText(R.string.query_page).setTabListener(this));actionBar.addTab(actionBar.newTab().setText(R.string.pay_page).setTabListener(this));}public void onRestoreInstanceState(Bundle savedInstanceState) {if (savedInstanceState.containsKey(SELECTED_ITEM)) {// 选中前面保存的索引对应的Fragment页getActionBar().setSelectedNavigationItem(savedInstanceState.getInt(SELECTED_ITEM));}}public void onSaveInstanceState(Bundle outState) {// 将当前选中的Fragment页的索引保存到Bundle中outState.putInt(SELECTED_ITEM, getActionBar().getSelectedNavigationIndex());}public void onTabUnselected(ActionBar.Tab tab,FragmentTransaction fragmentTransaction) {}// 当指定Tab被选中时激发该方法public void onTabSelected(ActionBar.Tab tab,FragmentTransaction fragmentTransaction) {// 创建一个新的Fragment对象Fragment fragment = new DummyFragment();// 创建一个Bundle对象，用于向Fragment传入参数Bundle args = new Bundle();args.putInt(DummyFragment.ARG_SECTION_NUMBER, tab.getPosition() + 1);// 向fragment传入参数fragment.setArguments(args);// 获取FragmentTransaction对象FragmentTransaction ft = getFragmentManager().beginTransaction();// 使用fragment代替该Activity中的container组件ft.replace(R.id.container, fragment);// 提交事务ft.commit();}public void onTabReselected(ActionBar.Tab tab,FragmentTransaction fragmentTransaction) {}}

DummyFragment.java

package jk.actionbartab;import android.app.Fragment;import android.os.Bundle;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class DummyFragment extends Fragment {public static final String ARG_SECTION_NUMBER = "section_number";// 该方法的返回值就是该Fragment显示的View组件public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {TextView textView = new TextView(getActivity());textView.setGravity(Gravity.CENTER_HORIZONTAL);// 获取创建该Fragment时传入的参数BundleBundle args = getArguments();// 设置TextView显示的文本textView.setText(args.getInt(ARG_SECTION_NUMBER) + "");textView.setTextSize(30);// 返回该TextViewreturn textView;}}