Android TabHost示例

Question

我做了并运行了例子.但我接受了错误.

Error: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tabmenu/com.example.tabmenu.MainActivity: java.lang.IllegalArgumentException: you must specify a way to create the tab indicator.

mainActivity.java

@SuppressWarnings("deprecation")
public class MainActivity extends TabActivity {

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        TabHost tabHost = (TabHost)findViewById(android.R.id.tabhost);

        TabSpec tab1 = tabHost.newTabSpec("First Tab");
        TabSpec tab2 = tabHost.newTabSpec("Second Tab");
        TabSpec tab3 = tabHost.newTabSpec("Third Tab");

        tab1.setIndicator("Tab1");
        tab1.setContent(new Intent(this,Tab1Activity.class));

        tab1.setIndicator("Tab2");
        tab1.setContent(new Intent(this,Tab2Activity.class));

        tab1.setIndicator("Tab3");
        tab1.setContent(new Intent(this,Tab3Activity.class));

        tabHost.addTab(tab1);
        tabHost.addTab(tab2);
        tabHost.addTab(tab3);
    }
}

AndroidManifest.xml中

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity 
            android:name="com.example.tabmenu.Tab1Activity"/>
        <activity
            android:name="com.example.tabmenu.Tab2Activity"/>
        <activity
            android:name="com.example.tabmenu.Tab3Activity"/>
        <activity
            android:name="com.example.tabmenu.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

Answer 1

尝试更改此细分:

tab1.setIndicator("Tab1");
tab1.setContent(new Intent(this,Tab1Activity.class));

tab1.setIndicator("Tab2");
tab1.setContent(new Intent(this,Tab2Activity.class));

tab1.setIndicator("Tab3");
tab1.setContent(new Intent(this,Tab3Activity.class));

以下一个....像这样:

tab1.setIndicator("Tab1");
tab1.setContent(new Intent(this,Tab1Activity.class));

--> tab2.setIndicator("Tab2");
--> tab2.setContent(new Intent(this,Tab2Activity.class));

--> tab3.setIndicator("Tab3");
--> tab3.setContent(new Intent(this,Tab3Activity.class));

该错误是因为您没有使用tab2或tab3并重复使用tab1.

希望这可以帮助.