当我想在活动开始时显示alertdialog时,我一直收到异常。 我想不通为什么?我真的很感激解释。
代码:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if (!isInternetConnectionAvailable()) {
AlertDialog alert = new AlertDialog.Builder(getApplicationContext()).create();
alert.setMessage("TEST DIALOG!!!");
alert.show();
}
...
03-19 16:04:33.933:ERROR / AndroidRuntime(15145):致命异常:主要 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):java.lang.RuntimeException:无法启动活动ComponentInfo {de.droidgroup.THMInfo / de.droidgroup.THMInfo.Activities.StartActivity}:android.view.WindowManager $ BadTokenException:无法添加窗口 - 令牌null不适用于应用程序 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.ActivityThread.access $ 2300(ActivityThread.java:125) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:2033) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.os.Handler.dispatchMessage(Handler.java:99) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.os.Looper.loop(Looper.java:123) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.ActivityThread.main(ActivityThread.java:4627) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):at java.lang.reflect.Method.invokeNative(Native Method) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):at java.lang.reflect.Method.invoke(Method.java:521) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:858) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):at dalvik.system.NativeStart.main(Native Method) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):引起:android.view.WindowManager $ BadTokenException:无法添加窗口 - 令牌null不适用于应用程序 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.view.ViewRoot.setView(ViewRoot.java:509) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.Dialog.show(Dialog.java:241) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):at de.droidgroup.THMInfo.Activities.StartActivity.onCreate(StartActivity.java:82) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 03-19 16:04:33.933:ERROR / AndroidRuntime(15145):... 11更多