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我使用 ActionBar 和 2 个选项卡创建了非常基本的 Android 应用程序。它工作正常。然后我添加了语言环境资源目录res/values-de，并在其中添加了strings.xml用德语翻译的字符串。我将 Nexus7 上的语言更改为德语，部署后应用程序无法启动。我在模拟器上遇到了同样的问题。

请你能帮我让这个应用程序在我的移动设备上以一些非默认语言环境运行吗？在我的情况下德语...

报告以下错误。

02-07 15:32:41.314: W/dalvikvm(16682): threadid=1: thread exiting with uncaught exception (group=0x40d82930)
02-07 15:32:41.324: E/AndroidRuntime(16682): FATAL EXCEPTION: main
02-07 15:32:41.324: E/AndroidRuntime(16682): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tabactionbar/com.example.tabactionbar.MainActivity}: java.lang.NullPointerException
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.os.Handler.dispatchMessage(Handler.java:99)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.os.Looper.loop(Looper.java:137)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.ActivityThread.main(ActivityThread.java:5039)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at java.lang.reflect.Method.invokeNative(Native Method)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at java.lang.reflect.Method.invoke(Method.java:511)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at dalvik.system.NativeStart.main(Native Method)
02-07 15:32:41.324: E/AndroidRuntime(16682): **Caused by: java.lang.NullPointerException
02-07 15:32:41.324: E/AndroidRuntime(16682):    at com.example.tabactionbar.MainActivity.onCreate(MainActivity.java:20)**
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.Activity.performCreate(Activity.java:5104)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
02-07 15:32:41.324: E/AndroidRuntime(16682):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
02-07 15:32:41.324: E/AndroidRuntime(16682):    ... 11 more
02-07 15:32:41.334: W/ActivityManager(492):   Force finishing activity com.example.tabactionbar/.MainActivity
02-07 15:32:41.434: D/dalvikvm(492): GC_FOR_ALLOC freed 546K, 19% free 15994K/19568K, paused 64ms, total 64ms
02-07 15:32:41.574: D/libgps(492): proxy_gps_nmea_cb()

没有 TabListener 的 MainActivity 代码：

public class MainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ActionBar actionBar = getActionBar();

    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    String label1 = getResources().getString(R.string.label1);
    Tab tab = actionBar.newTab();
    tab.setText(label1);
    TabListener<Tab1Fragment> tl = new TabListener<Tab1Fragment>(this,
            label1, Tab1Fragment.class);
    tab.setTabListener(tl);
    actionBar.addTab(tab);

    String label2 = getResources().getString(R.string.label2);
    tab = actionBar.newTab();
    tab.setText(label2);
    TabListener<Tab2Fragment> tl2 = new TabListener<Tab2Fragment>(this,
            label2, Tab2Fragment.class);
    tab.setTabListener(tl2);
    actionBar.addTab(tab);          
}

报错第20行是 actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

带有德语文本的 strings.xml是

<string name="app_name">TabActionBar</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
<string name="title_activity_main">MainActivity</string>
<string name="label1">Eins</string>
<string name="label2">Zwei</string>
<string name="body1">Erste</string>
<string name="body2">Zweite</string>

请你能帮我让这个应用程序在我的移动设备上以一些非默认语言环境运行吗？在我的情况下德语...

4

1 回答 1

6

Check out this discussion: Action Bar - Menu Button - Missing

By any chance, do you also have the styles.xml file inside the values-de folder? This could cause problems with the ActionBar becoming NULL.

于 2013-02-11T17:29:37.327 回答