android - 在应用程序处于后台时更改语言

Question

有人试过吗？

我有一个应用程序，我已将其配置为根据设备的区域设置以 2 种不同的语言运行。

重现步骤。

(考虑到我使用法语和英语)

1. 设置英语语言环境。
2. 加载应用。
3. 将应用程序发送到后台。
4. 将设备区域设置更改为法语。
5. 返回您的应用并将其激活。
6. (一切看起来都很好..现在一切都以法语加载(应该如此))
7. 转到另一个屏幕。
8. 收到NullPointerException !!!

嗯？!

对此有什么想法吗？

稍后编辑(请求)

这是 ADB 堆栈跟踪:

06-04 00:35:27.093: WARN/dalvikvm(18434): threadid=3: thread exiting with uncaught exception (group=0x4001dc20)
06-04 00:35:27.093: ERROR/AndroidRuntime(18434): Uncaught handler: thread main exiting due to uncaught exception
06-04 00:35:27.123: ERROR/AndroidRuntime(18434): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MyPackageName.__XXXXX__/com.MyPackageName.__XXXXX__.activity.MenuTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MyPackageName.__XXXXX__/com.MyPackageName.__XXXXX__.activitygroup.MyProfileActivityGroup}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MyPackageName.__XXXXX__/com.MyPackageName.__XXXXX__.activity.myprofile.DriverProfileActivity}: java.lang.NullPointerException
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.os.Looper.loop(Looper.java:123)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.main(ActivityThread.java:4363)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at java.lang.reflect.Method.invokeNative(Native Method)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at java.lang.reflect.Method.invoke(Method.java:521)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at dalvik.system.NativeStart.main(Native Method)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MyPackageName.__XXXXX__/com.MyPackageName.__XXXXX__.activitygroup.MyProfileActivityGroup}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MyPackageName.__XXXXX__/com.MyPackageName.__XXXXX__.activity.myprofile.DriverProfileActivity}: java.lang.NullPointerException
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:2335)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:648)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.widget.TabHost.setCurrentTab(TabHost.java:320)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.widget.TabHost.addTab(TabHost.java:213)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at com.MyPackageName.__XXXXX__.activity.MenuTabActivity.onCreate(MenuTabActivity.java:80)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     ... 11 more
06-04 00:35:27.123: ERROR/AndroidRuntime(18434): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MyPackageName.__XXXXX__/com.MyPackageName.__XXXXX__.activity.myprofile.DriverProfileActivity}: java.lang.NullPointerException
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:2335)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at com.MyPackageName.__XXXXX__.activitygroup.MyProfileActivityGroup.startChildActivity(MyProfileActivityGroup.java:69)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at com.MyPackageName.__XXXXX__.activitygroup.MyProfileActivityGroup.onCreate(MyProfileActivityGroup.java:63)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     ... 20 more
06-04 00:35:27.123: ERROR/AndroidRuntime(18434): Caused by: java.lang.NullPointerException
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at com.MyPackageName.__XXXXX__.activity.myprofile.DriverProfileActivity.onCreate(DriverProfileActivity.java:545)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
06-04 00:35:27.123: ERROR/AndroidRuntime(18434):     ... 27 more

有人吗？

Answer 1

可能是因为您超出了 Activity 生命周期并且在切换时某些对象未被创建，因此您应该检查下一步:

1. 如果没有第 4 步，这是否可行？

2. 如果某些值被缓存/未正确翻译(比如您正在设置某些字段而不是每次更新)

   mField = getString(R.string.title);