Android 中ActionBar+fragment实现页面导航、KeyDown事件、自定义主题Style

为保证android2.0以上均能运行，使用support.v7库下的actionbar及fragment继承自AppCompatActivity（ActionBarActivity已过时）使用getSupportActionBar()得到ActionBar，ActionBar.Tab，这里Tab必须设置监听，在监听中实现Fragment的切换。

这里重点提一下，Theme主题一定要适配，因为我使用的是AppCompatActivity，后面自定义主题。

1、main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <FrameLayout
        android:id="@+id/context"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</android.support.constraint.ConstraintLayout>

2、MainActivity

package com.example.call_aidl_for_rfid_as;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;

public class Main2Activity extends AppCompatActivity {

    ActionBar actionBar;
    BaseFragment curFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        actionBar = getSupportActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        ActionBar.Tab tab1 = actionBar.newTab();
        tab1.setText("新业务Service");

        tab1.setTabListener(new MyTabListener(new NewBusinessServiceFragment()));
        ActionBar.Tab tab2 = actionBar.newTab().setText("盘点Service");
        tab2.setTabListener(new MyTabListener(new InventoryServiceFragment()));
        actionBar.addTab(tab1);
        actionBar.addTab(tab2);
    }



    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {return curFragment.onKeyDown(keyCode,event);
    }

    class MyTabListener implements ActionBar.TabListener{

        private BaseFragment fragment;
        public MyTabListener (BaseFragment fragment){
            this.fragment=fragment;
        }


        @Override
        public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
            curFragment = fragment;
            ft.replace(R.id.context,fragment);
        }

        @Override
        public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {

        }

        @Override
        public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
            
        }
    }

    @Override
    protected void onDestroy() {

        super.onDestroy();
    }

}

3、BaseFragement.class   用于处理KeyDown事件

package com.example.rfid_sdk_as;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.KeyEvent;

public class BaseFragment extends Fragment{

    //这里的是我们的重点
    public boolean onKeyDown(int keyCode, KeyEvent event){return false;
    }
}

4、NewBusinessServiceFragment

public class NewBusinessServiceFragment extends BaseFragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_fragment_new_business, container, false);
    }
     
   @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {

        super.onActivityCreated(savedInstanceState);
        View view = getView();
        context = view.getContext();

   }

 @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {

        // TODO Auto-generated method stub
        if (keyCode == 280 || keyCode == 139) {
           
        }

        return super.onKeyDown(keyCode, event);
    }


}

5、InventoryServiceFragment

public class NewBusinessServiceFragment extends BaseFragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_inventory, container, false);
    }
     
   @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {

        super.onActivityCreated(savedInstanceState);
        View view = getView();
        context = view.getContext();

   }

 @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {

        // TODO Auto-generated method stub
        if (keyCode == 280 || keyCode == 139) {
           
        }

        return super.onKeyDown(keyCode, event);
    }


}

6、AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.rfid_sdk_as">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/CustomActionBarTheme">

        <activity android:name=".Main2Activity"
            android:windowSoftInputMode="adjustPan">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
       
        <activity
            android:name=".MainActivity"
            android:windowSoftInputMode="adjustPan">
        </activity>

    </application>

</manifest>

7、配置CustomActionBarTheme主题，在values目录下的style.xml文件中添加如下：

 <style name="CustomActionBarTheme" parent="@style/Theme.AppCompat.Light">
        <item name="android:actionBarStyle">@style/MyActionBar</item>
        <item name="android:actionBarDivider">@null</item>
        <item name="android:actionBarTabTextStyle">@style/MyActionBarTabText</item>
        <!--         <item name="android:actionBarTabStyle">@style/MyActionBarTabs</item> -->
        <item name="android:actionBarTabBarStyle">@style/MyActionBarTabBars</item>
        <item name="android:actionMenuTextColor">@android:color/holo_green_light</item>

        <!-- Support library compatibility -->
        <item name="actionBarStyle">@style/MyActionBar</item>
        <item name="actionBarDivider">@null</item>
        <item name="actionBarTabTextStyle">@style/MyActionBarTabText</item>
        <!--         <item name="actionBarTabStyle">@style/MyActionBarTabs</item> -->
        <item name="actionBarTabBarStyle">@style/MyActionBarTabBars</item>
        <item name="actionMenuTextColor">@android:color/holo_green_light</item>
    </style>

    <!-- ActionBar styles -->
    <style name="MyActionBar" parent="@style/Widget.AppCompat.ActionBar">
        <!--<item name="android:background">@android:color/holo_orange_light</item>-->
        <item name="android:titleTextStyle">@style/MyActionBarTitleText</item>
        <item name="android:backgroundStacked">@color/colorWhite</item>

        <!-- Support library compatibility -->
        <item name="background">@color/colorPrimary</item>
        <item name="titleTextStyle">@style/MyActionBarTitleText</item>
        <item name="backgroundStacked">@color/colorWhite</item>
    </style>

    <!-- ActionBar title text -->
    <style name="MyActionBarTitleText" parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title">
        <item name="android:textColor">@color/colorWhite</item>
    </style>

    <!-- ActionBar tabs text -->
    <style name="MyActionBarTabText" parent="@style/Widget.AppCompat.ActionBar.TabText">
        <item name="android:textColor">@android:color/holo_blue_bright</item>
    </style>

    <style name="MyActionBarTabBars" parent="@style/Widget.AppCompat.ActionBar.TabBar">
        <item name="android:showDividers">none</item>
    </style>