图标的选项卡没有显示出来 [英] Icon in Tab is not showing up
问题描述
我开始与Android，当我尝试做一个TabHost带有图标和文本。只将文本是可见的，如果我留在空白能够看到图标的文本。我希望看到双方在屏幕上。
I'm starting with Android and when I try to do a TabHost with an icon and a text. Only the text is visible, if I left the text in blank it is possible to see the icon. I want to see both on screen.
有人可以给我建议？
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Usuario usu = new Usuario();
usu.nombre = "fsdf";
lista.add(usu);
adaptador = new AdaptadorCelda(this,lista);
ListView lstView = (ListView)findViewById(R.id.lista);
lstView.setAdapter(adaptador);
Button btn = (Button)findViewById(R.id.btnSalva);
btn.setOnClickListener(onSave);
Resources res = getResources();
TabHost tabs=(TabHost)findViewById(R.id.tabhost);
tabs.setup();
TabHost.TabSpec spec=tabs.newTabSpec("mitab1");
spec.setContent(R.id.tab1);
spec.setIndicator("",res.getDrawable(android.R.drawable.ic_menu_rotate));
tabs.addTab(spec);
spec=tabs.newTabSpec("mitab2");
spec.setContent(R.id.tab2);
spec.setIndicator("ddd",
res.getDrawable(android.R.drawable.presence_invisible));
tabs.addTab(spec);
tabs.setCurrentTab(0);
spec.setIndicator("",res.getDrawable(android.R.drawable.ic_menu_rotate)) In this case icon appears.
spec.setIndicator("ddd",
res.getDrawable(android.R.drawable.presence_invisible));
和这里是main.xml中
and here is the main.xml
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tab1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/lblNombre"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginTop="17dp"
android:text="Nombre"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="@+id/txtNombre"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/lblNombre"
android:layout_marginLeft="35dp"
android:layout_toRightOf="@+id/lblNombre"
android:ems="10" >
<requestFocus />
</EditText>
<EditText
android:id="@+id/txtApellido"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtNombre"
android:layout_below="@+id/txtNombre"
android:ems="10" />
<TextView
android:id="@+id/lblApellido"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/txtApellido"
android:layout_alignParentLeft="true"
android:text="Apellidos"
android:textAppearance="?android:attr/textAppearanceLarge" />
<RadioGroup
android:id="@+id/tipos"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/txtApellido"
android:layout_marginTop="35dp"
android:layout_toLeftOf="@+id/txtApellido" >
<RadioButton
android:id="@+id/rdbAlta"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="alta" />
<RadioButton
android:id="@+id/rdbBaja"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="baja" />
<RadioButton
android:id="@+id/rdbTramite"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="tramite" />
</RadioGroup>
<Button
android:id="@+id/btnSalva"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtApellido"
android:layout_alignTop="@+id/tipos"
android:layout_marginLeft="58dp"
android:layout_marginTop="30dp"
android:text="Button" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/txtApellido"
android:src="@drawable/ic_menu_chart" />
</RelativeLayout>
<LinearLayout
android:id="@+id/tab2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/lista"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/tipos"
android:layout_marginTop="24dp" >
</ListView>
</LinearLayout>
</FrameLayout>
推荐答案
你运行冰淇淋三明治设备上测试您的应用程序？我最近注意到，默认 TabHost 表现的不同取决于目标设备和Android平台版本。
Have you tested your app on a device running Ice Cream Sandwich? I noticed recently, that the default TabHost behaves differently depending on the target device and the android platform version.
运行一个应用程序，提供了一个图标和文字 setIndicator （从问题的来源），有下列测试结果：
Running an app that provides an icon and a text to setIndicator (as in the source from the question), had the following test result:
- 在手机与Android 2.1：两个图标和文字显示的地方（如预期的图标下方标签）
- 在手机与4.0.3：图标没有表现出和只有文字是可见
- 在平板电脑上运行ICS：其中显示为图标和文本 标签
- Phone with Android 2.1: both icon and text where shown (Label below the Icon as expected)
- Phone with 4.0.3: The icons didn't show and only the text was visible.
- Tablet running ICS: the tabs where shown with icon and text
当你发现过，用的空字符串替换标签在图标出现上的电话 - 但用户需要猜测的图标的含义。除此之外：当运行此版本在pre ICS手机应用程序的：该选项卡保持其尺寸，并保持图像下方的空白区域。
As you found out too, replacing the label with an empty string the icons appeared on the Phone - but then the user would need to guess the meaning of the icons. Apart from that: When running this version of the app on the pre ICS phone: The tabs keep their size and leave an empty area below the image.
要改变这种装置驱动的标签应该有多大的空间得到决定，我找到了解决办法在此的教程如何自定义选项卡：
To change this device driven decision on how much space the tabs should get, I found the solution in this tutorial on how to customize tabs:
首先，您需要提供您的自己的标签指示布局（布局/ tab_indicator.xml的教程），其包括的ImageView 和的TextView 。然后你告诉则tabspec 通过 setIndicator 来使用它。瞧：你在手机上的图标和标签与ICS太
First you need to provide your own tab indicator layout ("layout/tab_indicator.xml" in the tutorial) including an ImageView and a TextView. Then you tell the TabSpec to use this via setIndicator. And voilà: you get the icon and the label on the phone with ICS too.
下面是如何设置的指标的重要组成部分（这=当前的活动）：
Here is the important part on how to set up the indicator (this = the current activity):
TabHost.TabSpec spec = this.getTabHost().newTabSpec(tag);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
((TextView) tabIndicator.findViewById(R.id.title)).setText(label);
((ImageView) tabIndicator.findViewById(R.id.icon)).setImageResource(drawableResourceId);
spec.setIndicator(tabIndicator);
如果您想了解新旧手机的标签相同的外观有一个额外这里看看： <一href="http://jgilfelt.github.com/android-actionbarstylegenerator/">http://jgilfelt.github.com/android-actionbarstylegenerator/.这个页面将生成的图像和样式自定义操作栏，包括标签，帮我弄清楚如何需要9个补丁的背景图像进行定义。
If you like the same look of the tabs on older and newer phones have an additional look here: http://jgilfelt.github.com/android-actionbarstylegenerator/. This page generates images and styles to customize the action bar including the tabs and helped me figure out how the 9-patch background images need to be defined.
这篇关于图标的选项卡没有显示出来的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
