您的内容必须有一个 TabHost,其 id 属性为“android.R.id.tabhost”;

发布于 2024-12-21 09:38:29 字数 2807 浏览 2 评论 0原文

我有一个问题:

Java 代码

public class VisualizzaListaActivity extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    TabHost tabHost = getTabHost();  // The activity TabHost
    TabHost.TabSpec spec;  // Reusable TabSpec for each tab
    Intent intent;  // Reusable Intent for each tab

    // Create an Intent to launch an Activity for the tab (to be reused)
    intent = new Intent().setClass(this, DaAcquistareActivity.class);

    // Initialize a TabSpec for each tab and add it to the TabHost
    spec = tabHost.newTabSpec("daAcquistare").setIndicator("Da Acquistare").setContent(intent);
    tabHost.addTab(spec);

    // Do the same for the other tabs
    intent = new Intent().setClass(this, AcquistatiActivity.class);
    spec = tabHost.newTabSpec("acquistati").setIndicator("Acquistati").setContent(intent);
    tabHost.addTab(spec);

    tabHost.setCurrentTab(0);
}

}

XML 代码

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"   <-------------- It's tabhost -.-"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<LinearLayout
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:padding="5dp">
    <TabWidget
       android:id="@android:id/tabs"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content" />
    <FrameLayout
       android:id="@android:id/tabcontent"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:padding="5dp" />
</LinearLayout>
</TabHost>

和 LogCat

12-16 15:26:22.519: E/AndroidRuntime(8262): java.lang.RuntimeException: Unable to start activity ComponentInfo{android.smile.matteo.spesaPRO/android.smile.matteo.spesaPRO.VisualizzaListaActivity}: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'             
12-16 15:26:22.519: E/AndroidRuntime(8262): Caused by: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'
12-16 15:26:22.519: E/AndroidRuntime(8262):         at android.smile.matteo.spesaPRO.VisualizzaListaActivity.onCreate(VisualizzaListaActivity.java:13)

问题

有人可以告诉我为什么这么说

您的内容必须有一个 id 属性为“android.R.id.tabhost”的 TabHost

当 android:id = @android:id/tabhost? 时,

I have a problem:

Java Code

public class VisualizzaListaActivity extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    TabHost tabHost = getTabHost();  // The activity TabHost
    TabHost.TabSpec spec;  // Reusable TabSpec for each tab
    Intent intent;  // Reusable Intent for each tab

    // Create an Intent to launch an Activity for the tab (to be reused)
    intent = new Intent().setClass(this, DaAcquistareActivity.class);

    // Initialize a TabSpec for each tab and add it to the TabHost
    spec = tabHost.newTabSpec("daAcquistare").setIndicator("Da Acquistare").setContent(intent);
    tabHost.addTab(spec);

    // Do the same for the other tabs
    intent = new Intent().setClass(this, AcquistatiActivity.class);
    spec = tabHost.newTabSpec("acquistati").setIndicator("Acquistati").setContent(intent);
    tabHost.addTab(spec);

    tabHost.setCurrentTab(0);
}

}

XML code

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"   <-------------- It's tabhost -.-"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<LinearLayout
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:padding="5dp">
    <TabWidget
       android:id="@android:id/tabs"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content" />
    <FrameLayout
       android:id="@android:id/tabcontent"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:padding="5dp" />
</LinearLayout>
</TabHost>

And LogCat

12-16 15:26:22.519: E/AndroidRuntime(8262): java.lang.RuntimeException: Unable to start activity ComponentInfo{android.smile.matteo.spesaPRO/android.smile.matteo.spesaPRO.VisualizzaListaActivity}: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'             
12-16 15:26:22.519: E/AndroidRuntime(8262): Caused by: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'
12-16 15:26:22.519: E/AndroidRuntime(8262):         at android.smile.matteo.spesaPRO.VisualizzaListaActivity.onCreate(VisualizzaListaActivity.java:13)

Problem

Someone can tell me why it's says

Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'

when the android:id = @android:id/tabhost?

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评论(5

ζ澈沫 2024-12-28 09:38:29

我相信这条消息的意思是:

     <TabHost android:id="@+id/tabhost"

应该改为:

     <TabHost android:id="@android:id/tabhost"

I believe the message means this:

     <TabHost android:id="@+id/tabhost"

should be changed to:

     <TabHost android:id="@android:id/tabhost"
一张白纸 2024-12-28 09:38:29

尝试从 Project > 清理您的构建如果您使用的是 Eclipse,请清理... 菜单。听起来很简单,但通常可以解决这个问题。

Try cleaning your build from the Project > Clean... menu if you are using Eclipse. Sounds simple but often fixes this problem.

ら栖息 2024-12-28 09:38:29

您唯一需要更改的是布局 xml 中的 android:id 属性,它应该是“ android:id="@android:id/tabhost" ”

Only thing you need to change is android:id attribute in layout xml , It should be " android:id="@android:id/tabhost" "

月朦胧 2024-12-28 09:38:29

我也有同样的问题。
实际上,我为 DaAcquistareActivity 类扩展了 TabActivity 。就是这个原因。我通过使用 Activity 而不是使用 TabActivity 扩展 DaAcquistareActivity 解决了这个问题。

I had the same problem.
Actually I extended TabActivity for DaAcquistareActivity class. This was the reason. I solved the problem by extending DaAcquistareActivity with Activity and not with TabActivity.

沦落红尘 2024-12-28 09:38:29

解决方案。
如果您要切换到新的 Activity,请检查它是否会扩展,可能是根据从主 Activity 复制的反射,并且有一个 TabActivity,但我们需要Activity 或其他 Activity。

Solution.
If you're switching to a new Activity check it extends, perhaps on reflex copied from the primary, and there is a TabActivity, but we need Activity or other activity.

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