Question

我是Android和开发新手。我正在使用Tab主机小部件。我正在做的是我制作了3个Java类和相应的xml文件。每个Java类都可以加载其xml。当有人按下选项卡时，它会重定向到上面的Java类。请找到我使用的以下代码。现在我遇到错误，请找到我使用的以下代码。

CompareActivity.java

package com.example.comparison.lk;
import android.os.Bundle;
import android.app.ActionBar;
import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.support.v4.app.NotificationCompat.Action;
import android.view.Menu;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;

import com.tabs.*;

public class CompareActivity extends TabActivity {

    TabHost tabHost;
    Intent intent;
    TabHost.TabSpec spec;
    @Override

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_compare);

        ActionBar actionbr= getActionBar();
        actionbr.setBackgroundDrawable(new ColorDrawable(0XFF1c3c4d));
        intialiseTabWidgets();
        tabHost = getTabHost();
        tabHost.setOnTabChangedListener(new OnTabChangeListener(){
               @Override
               public void onTabChanged(String tabId) {

               }
            });



    }

    public void intialiseTabWidgets()
    {
        //TabHost main_tab=(TabHost)findViewById(R.id.tabhost);
        //main_tab.setup();

        /************* TAB1 ************/
        // Create Intents to launch an Activity for the tab (to be reused)
        intent = new Intent().setClass(this, Login.class);
        spec = tabHost.newTabSpec("First").setIndicator("").setContent(intent);

        // Add intent to tab
        tabHost.addTab(spec);


        /************* TAB2 ************/
        // Create Intents to launch an Activity for the tab (to be reused)
        intent = new Intent().setClass(this, compareNow.class);
        spec = tabHost.newTabSpec("second").setIndicator("").setContent(intent);
        // Add intent to tab
        tabHost.addTab(spec);

        /************* TAB3 ************/
        intent = new Intent().setClass(this, Search.class);
        spec = tabHost.newTabSpec("third").setIndicator("").setContent(intent);
        tabHost.addTab(spec);

    }

comapreNow.java/Login.java/Search.java 所有这些使用相同结构的类

package com.tabs;

import com.example.comparison.lk.R;


import android.app.Activity;
import android.app.TabActivity;


import android.os.Bundle;
import android.widget.TabHost.OnTabChangeListener;


public class compareNow extends TabActivity implements OnTabChangeListener{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_compare);






    }

    @Override
    public void onTabChanged(String tabId) {
        // TODO Auto-generated method stub

    }


}

activity_compare.xml

<?xml version="1.0" encoding="UTF-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:adjustViewBounds="true"
            android:src="@drawable/topbar" />

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp" >
        </RelativeLayout>

        <TabHost
            android:id="@android:id/tabhost"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >


        </TabHost>

    </LinearLayout>

</FrameLayout>

compare_now.xml / login.xml / search.xml 所有这些文件具有相同的结构

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

</LinearLayout>

AndroidManifest文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.comparison.lk"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"

        android:label="@string/app_name"
        android:theme="@style/AppBaseTheme"

         >
        <activity
            android:name="com.example.comparison.lk.CompareActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

         <activity android:name="com.tabs.compareNow"></activity>
         <activity android:name="com.tabs.Login"></activity>
         <activity android:name="com.tabs.Search"></activity>



    </application>

</manifest>

Logcat错误

 01-23 12:13:08.968: E/AndroidRuntime(27433): FATAL EXCEPTION: main
01-23 12:13:08.968: E/AndroidRuntime(27433): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.comparison.lk/com.example.comparison.lk.CompareActivity}: java.lang.RuntimeException: Your TabHost must have a TabWidget whose id attribute is 'android.R.id.tabs'
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.os.Looper.loop(Looper.java:137)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.ActivityThread.main(ActivityThread.java:4511)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at java.lang.reflect.Method.invokeNative(Native Method)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at java.lang.reflect.Method.invoke(Method.java:511)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at dalvik.system.NativeStart.main(Native Method)
01-23 12:13:08.968: E/AndroidRuntime(27433): Caused by: java.lang.RuntimeException: Your TabHost must have a TabWidget whose id attribute is 'android.R.id.tabs'
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.widget.TabHost.setup(TabHost.java:124)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.widget.TabHost.setup(TabHost.java:178)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.TabActivity.onContentChanged(TabActivity.java:135)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:275)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.Activity.setContentView(Activity.java:1835)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at com.example.comparison.lk.CompareActivity.onCreate(CompareActivity.java:25)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.Activity.performCreate(Activity.java:4470)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
01-23 12:13:08.968: E/AndroidRuntime(27433):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
01-23 12:13:08.968: E/AndroidRuntime(27433):    ... 11 more

Answer 1

您在使用xml和public void intialiseTabWidgets()方法

时遇到错误

xml应更改为：

<?xml version="1.0" encoding="UTF-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

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

                <TabWidget
                    android:id="@android:id/tabs"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                     android:background="#160203" />

                <FrameLayout
                    android:id="@android:id/tabcontent"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"/>

            </LinearLayout>

        </TabHost>

</FrameLayout>

并且使用intialiseTabWidgets()方法应该具有空引用oncreate方法

TabHost tabHost = getTabHost();

应改为

tabHost = getTabHost();

错误：您的TabHost必须有一个TabWidget，其id属性为'android.R.id.tabs

1 个答案: