问题描述

设置一个带小三角形的选项卡

我想在程序中把选项卡像以下案例显示，选项卡图像下面有一个小三角形。有实现的方法吗？使用代码或文字形式都可以。

解决方案

<?xml version=""1.0"" encoding=""utf-8""?><selector xmlns:android=""http://schemas.android.com/apk/res/android"">    <!-- Non focused states -->    <item android:state_focused=""false"" android:state_selected=""false"" android:state_pressed=""false"" android:drawable=""@drawable/tab_unselected"" />    <item android:state_focused=""false"" android:state_selected=""true"" android:state_pressed=""false"" android:drawable=""@drawable/tab_selected"" />    <!-- Focused states -->    <item android:state_focused=""true"" android:state_selected=""false"" android:state_pressed=""false"" android:drawable=""@drawable/tab_focus"" />    <item android:state_focused=""true"" android:state_selected=""true"" android:state_pressed=""false"" android:drawable=""@drawable/tab_focus"" />    <!-- Pressed -->    <item android:state_pressed=""true"" android:drawable=""@drawable/tab_press"" /></selector>

解决方案二：
tab_0_info.xml:

<?xml version=""1.0"" encoding=""utf-8""?><selector xmlns:android=""http://schemas.android.com/apk/res/android"">    <item android:drawable=""@drawable/ic_menu_yourImg_selected""        android:state_selected=""true"" />    <item android:drawable=""@drawable/ic_menu_yourImg"" /></selector>private void addTab(int resouceTabId int drawableId        Class<? extends ActivityGroup> groupActivityClass){    Intent intent = new Intent(this groupActivityClass);    TabHost.TabSpec spec = tabHost.newTabSpec(""tab"" + resouceTabId);    View tabIndicator = LayoutInflater.from(this).inflate(            R.layout.tab_indicator getTabWidget() false);    TextView title = (TextView) tabIndicator.findViewById(R.id.title);    title.setText(resouceTabId);    ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);    icon.setImageResource(drawableId);    spec.setIndicator(tabIndicator);    spec.setContent(intent);    tabHost.addTab(spec);}//addTab(R.string.yourTabTitle R.drawable.tab_0_info YourGroup.class);

解决方案三：
你可以这样添加图片：

<RelativeLayout    android:orientation=""vertical""    android:layout_width=""fill_parent""    android:layout_height=""fill_parent"">    <TabWidget        android:id=""@android:id/tabs""        android:layout_width=""match_parent""        android:layout_height=""wrap_content""        android:padding=""0dip"" />    <FrameLayout        android:fadingEdge=""none""        android:id=""@android:id/tabcontent""        android:layout_width=""fill_parent""        android:layout_height=""0px""        android:layout_below=""@android:id/tabs""        android:layout_alignParentBottom=""true""        android:padding=""0px"" />    <ImageView         ....        android:id=""@+id/down_arrow_left""/>    <ImageView         ....        android:id=""@+id/down_arrow_right""/></RelativeLayout>

在tab中添加监听器：

getTabHost().setOnTabChangedListener(new OnTabChangeListener() {        public void onTabChanged(String tabId) {            if (tabId.equels(""left"")){                findViewById(R.id.down_arrow_left).setVisibility(View.VISIBLE);                findViewById(R.id.down_arrow_right).setVisibility(View.INVISIBLE);            } else if (tabId.equels(""right"")){                findViewById(R.id.down_arrow_left).setVisibility(View.INVISIBLE);                findViewById(R.id.down_arrow_right).setVisibility(View.VISIBLE);            }        }    });