实例讲解Android应用开发中TabHost的使用要点

前端技术 2023/09/06 Android

Tab与TabHost:

这就是Tab,而盛放Tab的容器就是TabHost 。
如何实现??
每一个Tab还对应了一个布局,这个就有点好玩了。一个Activity,对应了多个功能布局。
新建一个Tab项目,注意,不要生成main Activity 。

注意IDE,这里不要选...
在包里面新建一个类MyTab,继承于TabActivity。
其实,TabActivity是Activity的子类

package zyf.tab.test;
 
import android.app.TabActivity;
 
public class MyTab extends TabActivity {
 
}

从父类继承OnCreate()入口方法

package zyf.tab.test;
import android.app.TabActivity;
import android.os.Bundle;
public class MyTab extends TabActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
  }
}

在Manifest.xml文件中注册一下MyTab类(Activity)

<activity android:name=\".MyTab\">
  <intent-filter>
    <action android:name=\"android.intent.action.MAIN\"></action>
    <category android:name=\"android.intent.category.LAUNCHER\"></category>
  </intent-filter>
</activity>

这时候,需要设计一下标签页对应的布局,一般采用FrameLayout作为根布局,每个标签页面对应一个子节点的Layout

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<!-- 这里是根节点布局 -- >
<FrameLayout xmlns:android=\"http://schemas.android.com/apk/res/android\"
  android:layout_width=\"fill_parent\" android:layout_height=\"fill_parent\">
 
<!-- 第一个Tab 对应的布局 -- >
  <LinearLayout android:id=\"@+id/widget_layout_Blue\"
    android:layout_width=\"fill_parent\" android:layout_height=\"fill_parent\"
    androidrientation=\"vertical\" >
    <EditText android:id=\"@+id/widget34\" android:layout_width=\"fill_parent\"
      android:layout_height=\"wrap_content\" android:text=\"EditText\"
      android:textSize=\"18sp\">
    </EditText>
    <Button android:id=\"@+id/widget30\" android:layout_width=\"wrap_content\"
      android:layout_height=\"wrap_content\" android:text=\"Button\">
    </Button>
  </LinearLayout>
<!-- 第二个Tab 对应的布局 -- >
  <LinearLayout android:id=\"@+id/widget_layout_red\"
    android:layout_width=\"fill_parent\" android:layout_height=\"fill_parent\"
    androidrientation=\"vertical\" >
    <AnalogClock android:id=\"@+id/widget36\"
      android:layout_width=\"wrap_content\" android:layout_height=\"wrap_content\">
    </AnalogClock>
  </LinearLayout>
<!-- 第三个Tab 对应的布局 -- >
  <LinearLayout android:id=\"@+id/widget_layout_green\"
    android:layout_width=\"fill_parent\" android:layout_height=\"fill_parent\"
    androidrientation=\"vertical\">
    <RadioGroup android:id=\"@+id/widget43\"
      android:layout_width=\"166px\" android:layout_height=\"98px\"
      androidrientation=\"vertical\">
      <RadioButton android:id=\"@+id/widget44\"
        android:layout_width=\"wrap_content\" android:layout_height=\"wrap_content\"
        android:text=\"RadioButton\">
      </RadioButton>
      <RadioButton android:id=\"@+id/widget45\"
        android:layout_width=\"wrap_content\" android:layout_height=\"wrap_content\"
        android:text=\"RadioButton\">
      </RadioButton>
    </RadioGroup>
  </LinearLayout>
</FrameLayout>

首先,应该声明TabHost,然后用LayoutInflater过滤出布局来,给TabHost加上含有Tab页面的FrameLayout

private TabHost myTabhost;
myTabhost=this.getTabHost();//从TabActivity上面获取放置Tab的TabHost
LayoutInflater.from(this).inflate(R.layout.main, myTabhost.getTabContentView(), true);
//from(this)从这个TabActivity获取LayoutInflater
//R.layout.main 存放Tab布局
//通过TabHost获得存放Tab标签页内容的FrameLayout
//是否将inflate 拴系到根布局元素上
myTabhost.setBackgroundColor(Color.argb(150, 22, 70, 150));
//设置一下TabHost的颜色

接着,在TabHost创建一个标签,然后设置一下标题/图标/标签页布局

myTabhost.addTab(myTabhost.newTabSpec(\"TT\")// 制造一个新的标签TT
   .setIndicator(\"KK\",getResources().getDrawable(R.drawable.ajjc))
            // 设置一下显示的标题为KK,设置一下标签图标为ajjc
            .setContent(R.id.widget_layout_red));
    //设置一下该标签页的布局内容为R.id.widget_layout_red,这是FrameLayout中的一个子Layout

标签切换事件处理,setOnTabChangedListener

myTabhost.setOnTabChangedListener(new OnTabChangeListener(){
      @Override
      public void onTabChanged(String tabId) {
        // TODO Auto-generated method stub
      }      
    });

各个标签页的动态MENU
先把在XML中设计好的MENU放到一个int数组里

private static final int myMenuResources[] = { R.menu.phonebook_menu,
      R.menu.addphone_menu, R.menu.chatting_menu, R.menu.userapp_menu };

在setOnTabChangedListener()方法中根据标签的切换情况来设置myMenuSettingTag

Override
  public void onTabChanged(String tagString) {
    // TODO Auto-generated method stub
    if (tagString.equals(\"One\")) {
      myMenuSettingTag = 1;
    }
    if (tagString.equals(\"Two\")) {
      myMenuSettingTag = 2;
    }
    if (tagString.equals(\"Three\")) {
      myMenuSettingTag = 3;
    }
    if (tagString.equals(\"Four\")) {
      myMenuSettingTag = 4;
    }
    if (myMenu != null) {
      onCreateOptionsMenu(myMenu);
    }
  }

然后onCreateOptionsMenu(Menu menu) 方法中通过MenuInflater过滤器动态加入MENU

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // TODO Auto-generated method stub
    // Hold on to this
    myMenu = menu;
    myMenu.clear();//清空MENU菜单
    // Inflate the currently selected menu XML resource.
    MenuInflater inflater = getMenuInflater();    
//从TabActivity这里获取一个MENU过滤器
    switch (myMenuSettingTag) {
    case 1:
      inflater.inflate(myMenuResources[0], menu);
      //动态加入数组中对应的XML MENU菜单
      break;
    case 2:
      inflater.inflate(myMenuResources[1], menu);
      break;
    case 3:
      inflater.inflate(myMenuResources[2], menu);
      break;
    case 4:
      inflater.inflate(myMenuResources[3], menu);
      break;
    default:
      break;
    }
    return super.onCreateOptionsMenu(menu);
  }

menu 布局

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<menu
 xmlns:android=\"http://schemas.android.com/apk/res/android\">
<group android:id=\"@+id/group_a\"><item android:id=\"@+id/item_a\" android:icon=\"@drawable/gimp\" android:title=\"Gimp\"></item>
</group>
</menu>

运行效果

模仿微信导航实例:

<?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:layout_width=\"match_parent\" 
    android:layout_height=\"match_parent\" 
    android:orientation=\"vertical\" > 
 
    <FrameLayout 
      android:id=\"@android:id/tabcontent\" 
      android:layout_width=\"match_parent\" 
      android:layout_height=\"0.0dip\" 
      android:layout_weight=\"1.0\" > 
    </FrameLayout> 
 
    <TabWidget 
      android:id=\"@android:id/tabs\" 
      android:layout_width=\"match_parent\" 
      android:layout_height=\"wrap_content\" 
      android:visibility=\"gone\" > 
    </TabWidget> 
 
    <RadioGroup 
      android:layout_width=\"match_parent\" 
      android:layout_height=\"wrap_content\" 
      android:layout_gravity=\"bottom\" 
      android:background=\"@android:color/black\" 
      android:orientation=\"horizontal\" > 
 
      <RadioButton 
        android:id=\"@+id/talk\" 
        style=\"@style/rbt_bottom\" 
        android:drawableTop=\"@drawable/take_bottom\" 
        android:text=\"@string/talk\" /> 
 
      <RadioButton 
        android:id=\"@+id/address\" 
        style=\"@style/rbt_bottom\" 
        android:drawableTop=\"@drawable/adrress_bottom\" 
        android:text=\"@string/address\" /> 
 
      <RadioButton 
        android:id=\"@+id/find\" 
        style=\"@style/rbt_bottom\" 
        android:drawableTop=\"@drawable/find_bottom\" 
        android:text=\"@string/find\" /> 
 
      <RadioButton 
        android:id=\"@+id/me\" 
        style=\"@style/rbt_bottom\" 
        android:drawableTop=\"@drawable/me_bottom\" 
        android:text=\"@string/me\" /> 
    </RadioGroup> 
  </LinearLayout> 
 
</TabHost> 

<?xml version=\"1.0\" encoding=\"utf-8\"?> 
<selector xmlns:android=\"http://schemas.android.com/apk/res/android\"> 
 
  <item android:drawable=\"@drawable/n_address_l\" android:state_checked=\"true\" android:state_enabled=\"true\"/> 
  <item android:drawable=\"@drawable/n_address_h\"/> 
 
</selector> 

package com.android.xiong.bkclient; 
 
import android.app.TabActivity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.widget.CompoundButton; 
import android.widget.CompoundButton.OnCheckedChangeListener; 
import android.widget.RadioButton; 
import android.widget.TabHost; 
 
@SuppressWarnings(\"deprecation\") 
public class MainActivity extends TabActivity implements 
    OnCheckedChangeListener { 
 
  private TabHost tabHost; 
  private Intent addressIntent; 
  private Intent meIntent; 
  private Intent takeIntent; 
  private Intent findIntent; 
 
  private RadioButton findBt; 
  private RadioButton addressBt; 
  private RadioButton meBt; 
  private RadioButton takeBt; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.tabhostmain); 
    addressIntent = new Intent(this, AddressActivity.class); 
    meIntent = new Intent(this, MeActivity.class); 
    takeIntent = new Intent(this, TakeActivity.class); 
    findIntent = new Intent(this, FindActivity.class); 
    findBt = (RadioButton) findViewById(R.id.find); 
    addressBt = (RadioButton) findViewById(R.id.address); 
    meBt = (RadioButton) findViewById(R.id.me); 
    takeBt = (RadioButton) findViewById(R.id.talk); 
    tabHost =getTabHost(); 
    tabHost.addTab(tabHost.newTabSpec(\"take\").setIndicator(\"take\") 
        .setContent(takeIntent)); 
    tabHost.addTab(tabHost.newTabSpec(\"address\").setIndicator(\"address\") 
        .setContent(addressIntent)); 
    tabHost.addTab(tabHost.newTabSpec(\"find\").setIndicator(\"find\") 
        .setContent(findIntent)); 
    tabHost.addTab(tabHost.newTabSpec(\"me\").setIndicator(\"me\") 
        .setContent(meIntent)); 
    findBt.setOnCheckedChangeListener(this); 
    meBt.setOnCheckedChangeListener(this); 
    takeBt.setOnCheckedChangeListener(this); 
    addressBt.setOnCheckedChangeListener(this); 
  } 
 
  @Override 
  public void onCheckedChanged(CompoundButton view, boolean ischeak) { 
    if (ischeak) { 
      switch (view.getId()) { 
      case R.id.talk: 
        tabHost.setCurrentTabByTag(\"take\"); 
        break; 
      case R.id.find: 
        tabHost.setCurrentTabByTag(\"find\"); 
        break; 
      case R.id.me: 
        tabHost.setCurrentTabByTag(\"me\"); 
        break; 
      case R.id.address: 
        tabHost.setCurrentTabByTag(\"address\"); 
        break; 
      default: 
        break; 
      } 
    } 
 
  } 
} 


<manifest xmlns:android=\"http://schemas.android.com/apk/res/android\" 
  package=\"com.android.xiong.bkclient\" 
  android:versionCode=\"1\" 
  android:versionName=\"1.0\" > 
 
  <uses-sdk 
    android:minSdkVersion=\"8\" 
    android:targetSdkVersion=\"19\" /> 
 
  <application 
    android:allowBackup=\"true\" 
    android:icon=\"@drawable/ic_launcher\" 
    android:label=\"@string/app_name\" 
    android:theme=\"@style/AppTheme\" > 
    <activity android:name=\"com.android.xiong.bkclient.MainActivity\"> 
      <intent-filter> 
        <action android:name=\"android.intent.action.MAIN\" /> 
 
        <category android:name=\"android.intent.category.LAUNCHER\" /> 
      </intent-filter> 
    </activity> 
    <activity android:name=\"com.android.xiong.bkclient.AddressActivity\"></activity> 
    <activity android:name=\"com.android.xiong.bkclient.FindActivity\"></activity> 
    <activity android:name=\"com.android.xiong.bkclient.MeActivity\"></activity> 
    <activity android:name=\"com.android.xiong.bkclient.TakeActivity\"></activity> 
  </application> 
 
</manifest> 

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