我想创建一个选项卡式应用程序,但我试图运行应用程序时发现问题,并且主类扩展TabActivity。 主类代码如下:扩展TabActivity不工作在android
package org.practical.newsupdate;
import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;
public class NewsPage extends TabActivity{
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.newspage);
TabHost host = (TabHost) findViewById(R.id.tabhost);
host.setup();
new Intent().setClass(this, LocalNews.class);
TabSpec localTab = host.newTabSpec("Local");
localTab.setIndicator(getResources().getString(R.string.local),
getResources().getDrawable(android.R.drawable.star_on));
localTab.setContent(R.id.local_tab);
host.addTab(localTab);
new Intent().setClass(this, ForeignNews.class);
TabSpec foreignTab = host.newTabSpec("Foreign");
foreignTab.setIndicator(getResources().getString(R.string.foreign),
getResources().getDrawable(android.R.drawable.star_on));
foreignTab.setContent(R.id.foreign_tab);
host.addTab(foreignTab);
host.setCurrentTabByTag("Local");
}
}
XML是以下内容:
<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/newsimages" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:src="@drawable/newsimages" />
<TextView
android:id="@+id/newspage_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@string/menu_newspage" />
</RelativeLayout>
<TabHost
android:id="@+id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</TabWidget>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/local_tab"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</LinearLayout>
<LinearLayout
android:id="@+id/foreign_tab"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</LinearLayout>
</FrameLayout>
</LinearLayout>
</TabHost>
</LinearLayout>
日志猫显示以下错误:
12-25 18:11:24.846 :E/AndroidRuntime(569):致命例外:main 12-25 18:11:24.846:E/AndroidRuntime(569):java.lang.RuntimeException:无法启动活动ComponentInfo {org.practical.newsupdate/org.practical .newsupdate.NewsPage}:java.lang .RuntimeException:你的内容必须有一个TabHost,它的id属性是'android.R.id.tabhost' 12-25 18:11:24.846:E/AndroidRuntime(569):at android.app.ActivityThread.performLaunchActivity(ActivityThread。 java:1955) 12-25 18:11:24.846:E/AndroidRuntime(569):at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 12-25 18:11:24.846:E/AndroidRuntime 569):at android.app.ActivityThread.access $ 600(ActivityThread.java:122) 12-25 18:11:24.846:E/AndroidRuntime(569):at android.app.ActivityThread $ H.handleMessage(ActivityThread.java :1146) 12-25 18:11:24.846:E/AndroidRuntime(569):at android.os.Handler.dispatchMessage(Handler.java:99) 12-25 18:11:24.846:E/AndroidRuntime(569) ):at android.os.Looper.loop(Looper.java:137) 12-25 18:11:24.846:E/AndroidR untime(569):at android.app.ActivityThread.main(ActivityThread.java:4340) 12-25 18:11:24.846:E/AndroidRuntime(569):at java.lang.reflect.Method.invokeNative(Native Method ) 12-25 18:11:24.846:E/AndroidRuntime(569):at java.lang.reflect.Method.invoke(Method.java:511) 12-25 18:11:24.846:E/AndroidRuntime(569) ):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:784) 12-25 18:11:24.846:E/AndroidRuntime(569):at com.android.internal.os.ZygoteInit .main(ZygoteInit.java:551) 12-25 18:11:24.846:E/AndroidRuntime(569):at dalvik.system.NativeStart.main(Native Method) 12-25 18:11:24.846:E/AndroidRuntime(569):引发:java.lang.RuntimeException:您的内容必须具有一个TabHost,其id属性为'android.R.id.tabhost' 12-25 18:11:24.846:E/A ndroidRuntime(569):at android.app.TabActivity.onContentChanged(TabActivity.java:131) 12-25 18:11:24.846:E/AndroidRuntime(569):at com.android.internal.policy.impl.PhoneWindow。 setContentView(PhoneWindow.java:254) 12-25 18:11:24.846:E/AndroidRuntime(569):at android.app.Activity.setContentView(Activity.java:1835) 12-25 18:11:24.846: E/AndroidRuntime(569):at org.practical.newsupdate.NewsPage.onCreate(NewsPage.java:13) 12-25 18:11:24.846:E/AndroidRuntime(569):at android.app.Activity.performCreate Activity.java:4465) 12-25 18:11:24.846:E/AndroidRuntime(569):at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 12-25 18:11:24.846:E/AndroidRuntime(569):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 12-25 18: 11:24.846:E/AndroidRuntime(569):... 11更多
显示的错误是应用程序突然停止工作。有人可以帮帮我吗?
预先感谢任何帮助
请发布您在logcat中获得的例外 – 2011-12-25 15:56:26
我在此问题中发布了logcat例外 – xarababe 2011-12-25 17:32:03