爲什麼我在Eclipse下面的代碼中發生錯誤?如何從InputMethodService打開ProgressDialog
代碼:
public class ServiceKeyboard extends InputMethodService implements KeyboardView.OnKeyboardActionListener
{
public static ProgressDialog progressDialog;
...
@Override public void onStartInput(EditorInfo attribute, boolean restarting)
{
super.onStartInput(attribute, restarting);
progressDialog = new ProgressDialog(ServiceKeyboard.this);
progressDialog.setMessage(getString(R.string.sSpinner));
// after this line crash
progressDialog.show();
...
...
if(progressDialog != null) progressDialog.dismiss();
}
}
錯誤:
11-23 12:53:07.854: E/AndroidRuntime(23963): FATAL EXCEPTION: main
11-23 12:53:07.854: E/AndroidRuntime(23963): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.view.ViewRootImpl.setView(ViewRootImpl.java:589)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:326)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.app.Dialog.show(Dialog.java:277)
11-23 12:53:07.854: E/AndroidRuntime(23963): at com.avanpost.mobile.ServiceKeyboard.onStartInput(ServiceKeyboard.java:354)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.inputmethodservice.InputMethodService.doStartInput(InputMethodService.java:1549)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.inputmethodservice.InputMethodService$InputMethodImpl.startInput(InputMethodService.java:388)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.inputmethodservice.IInputMethodWrapper.executeMessage(IInputMethodWrapper.java:158)
11-23 12:53:07.854: E/AndroidRuntime(23963): at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:61)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.os.Handler.dispatchMessage(Handler.java:99)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.os.Looper.loop(Looper.java:137)
11-23 12:53:07.854: E/AndroidRuntime(23963): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-23 12:53:07.854: E/AndroidRuntime(23963): at java.lang.reflect.Method.invokeNative(Native Method)
11-23 12:53:07.854: E/AndroidRuntime(23963): at java.lang.reflect.Method.invoke(Method.java:511)
11-23 12:53:07.854: E/AndroidRuntime(23963): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-23 12:53:07.854: E/AndroidRuntime(23963): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-23 12:53:07.854: E/AndroidRuntime(23963): at dalvik.system.NativeStart.main(Native Method)
什麼是打開窗口progressDialog時softKeyboard(InputMethodService)開始最好的解決辦法?我嘗試「新的ProgressDialog(this);」,「新的ProgressDialog(getApplicationContext());」而是「新的ProgressDialog(ServiceKeyboard.this);」,但失敗。
您需要的活動通過在你的progressDialog – njzk2
的instanciation一個方面,我嘗試 「新的ProgressDialog(本);」,「新ProgressDialog (getApplicationContext());「而是「新的ProgressDialog(ServiceKeyboard.this);」,但失敗。 –
是的。因爲你需要一個活動,而不是一個InputMethodService實例。你有手頭的活動嗎? – njzk2