我正在使用一个下拉框来展示国家ID。一切看起来都很好,直到我运行应用并点击下拉框。当我点击下拉框后,应用程序崩溃。
以下是我的下拉框XML代码(它位于LinearLayout中,如果有用的话):
<Spinner
style="@style/mediumBlackDefault"
android:id="@+id/spinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="4" />
以下是我如何填充它的方式:
Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getApplicationContext(),R.array.countries_array,
android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
这是countries_array:
<string-array name="countries_array">
<item>AE</item>
<item>AF</item>
<item>AG</item>
<item>AI</item>
<item>AL</item>
<item>AM</item>
</string-array>
最终我收到了这些错误信息:
03-09 11:39:36.944: E/AndroidRuntime(990): FATAL EXCEPTION: main
03-09 11:39:36.944: E/AndroidRuntime(990): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
03-09 11:39:36.944: E/AndroidRuntime(990): at android.view.ViewRootImpl.setView(ViewRootImpl.java:519)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:279)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:193)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:118)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.app.Dialog.show(Dialog.java:274)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.app.AlertDialog$Builder.show(AlertDialog.java:932)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.widget.Spinner$DialogPopup.show(Spinner.java:672)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.widget.Spinner.performClick(Spinner.java:435)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.view.View$PerformClick.run(View.java:13983)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.os.Handler.handleCallback(Handler.java:605)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.os.Handler.dispatchMessage(Handler.java:92)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.os.Looper.loop(Looper.java:137)
03-09 11:39:36.944: E/AndroidRuntime(990): at android.app.ActivityThread.main(ActivityThread.java:4340)
03-09 11:39:36.944: E/AndroidRuntime(990): at java.lang.reflect.Method.invokeNative(Native Method)
03-09 11:39:36.944: E/AndroidRuntime(990): at java.lang.reflect.Method.invoke(Method.java:511)
03-09 11:39:36.944: E/AndroidRuntime(990): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-09 11:39:36.944: E/AndroidRuntime(990): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-09 11:39:36.944: E/AndroidRuntime(990): at dalvik.system.NativeStart.main(Native Method)
我已阅读所有可用的帖子,但没有解决我的问题。
非常感谢!