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低版本系统兼容的ActionBar(四)添加Tab+添加自定义的Tab视图

在ActionBar中添加Tab是很有用的技巧。在support V7库的支持下,我们几乎可以用和之前一样的方式来添加Tab,对于Tab来说,我们可以和MenuItem一样,给他定义自己的视图。我这里定义了个进度条,主要是来说明这个问题。本系列的博文也将接近尾声了,后面就是个定义ActionBar样式和一个仿照微信的实例,顺便讲解下Fragment和ViewPager的用法。

 

activity_main.xml(定义了一个Fragment)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.kale.actionbar03.MainActivity" >    <FrameLayout        android:id="@+id/container_id"        android:layout_width="match_parent"        android:layout_height="match_parent" /></RelativeLayout>

 

tab_custom_view.xml(自定义的Tab视图)

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent">    <ProgressBar        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:indeterminate="true"/></LinearLayout>

 

MainActivity.java

package com.kale.actionbar03;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentTransaction;import android.support.v7.app.ActionBar;import android.support.v7.app.ActionBar.Tab;import android.support.v7.app.ActionBarActivity;import android.widget.Toast;public class MainActivity extends ActionBarActivity implements ActionBar.TabListener{    ActionBar actionBar;    private static final String SELECTED_ITEM = "selected_item";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        actionBar = getSupportActionBar();          //actionbar.setDisplayShowHomeEnabled(false);        //actionbar.setDisplayShowTitleEnabled(false);//定义这两行后就会没有标题栏,只有tab栏了                //设定有Tab        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);        ActionBar.Tab tab;        //开始添加Tab        for (int i = 1; i <= 3; i++) {            tab = actionBar.newTab();            tab.setText("Tab " + i);            tab.setTabListener(this);            actionBar.addTab(tab);        }        tab = actionBar.newTab();        tab.setCustomView(R.layout.tab_custom_view);        tab.setText("x");        tab.setTabListener(this);        actionBar.addTab(tab);    }    @Override    protected void onRestoreInstanceState(Bundle savedInstanceState) {        super.onRestoreInstanceState(savedInstanceState);        if (savedInstanceState.containsKey(SELECTED_ITEM)) {            //选中前面保存的索引对应的Fragment页            actionBar.setSelectedNavigationItem(savedInstanceState.getInt(SELECTED_ITEM));        }    }        @Override    protected void onSaveInstanceState(Bundle outState) {        //将当前选中的fragment页的索引保存到Bundle中        outState.putInt(SELECTED_ITEM, actionBar.getSelectedNavigationIndex());        super.onSaveInstanceState(outState);    }        /*      * @see android.support.v7.app.ActionBar.TabListener#onTabReselected(android.support.v7.app.ActionBar.Tab, android.support.v4.app.FragmentTransaction)     * Tab再次被选中的时候执行的方法     */    @Override    public void onTabReselected(Tab tab, FragmentTransaction transaction) {            }    @Override    public void onTabSelected(Tab tab, FragmentTransaction transaction) {        Toast.makeText(getApplicationContext(), tab.getText(), 0).show();        //创建一个新的Fragment的对象        Fragment fragment = new DummyFragment();        //创建一个Bundle对象,用于向Fragment传入参数        Bundle bundle = new Bundle();        bundle.putInt(DummyFragment.BUNDLE_SECTION_NUMBER, tab.getPosition()+1);        //向Fragment传入参数        fragment.setArguments(bundle);                FragmentTransaction ft = getSupportFragmentManager().beginTransaction();        //使用fragment        ft.replace(R.id.container_id, fragment);        ft.commit();    }     @Override    public void onTabUnselected(Tab tab, FragmentTransaction transaction) {    }}

 

DummyFragment.java

package com.kale.actionbar03;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;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 BUNDLE_SECTION_NUMBER = "section_number";    // 该返回值就是这个Fragment显示的view组件    @Override    public View onCreateView(LayoutInflater inflater,            @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        super.onCreateView(inflater, container, savedInstanceState);        TextView textView = new TextView(getActivity());        textView.setGravity(Gravity.CENTER);        // 获取创建该Fragment时传入的参数的Bundle        Bundle bundle = getArguments();        textView.setText("Fragment 0" + bundle.getInt(BUNDLE_SECTION_NUMBER));        textView.setTextSize(50);        return textView;    }}

 

源码下载:http://download.csdn.net/detail/shark0017/7688459