我試圖做一個很簡單的事情,顯示警報,只有1個按鈕,點擊,如果我想對話框關閉,比應用程序退出\結束()如何從AlertDialog
退出程序目前我正在使用該設備的通用警報:
應用程序意外停止。請重試
在logcat中我得到:無法暫停活動
這裏是日誌:
01-03 14:49:00.670: ERROR/AndroidRuntime(22536): Uncaught handler: thread main exiting due to uncaught exception
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): java.lang.RuntimeException: Unable to pause activity {com.SprintTwo/com.SprintTwo.SprintTwo}: java.lang.NullPointerException
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3162)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3119)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3102)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.ActivityThread.access$2400(ActivityThread.java:119)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1874)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.os.Handler.dispatchMessage(Handler.java:99)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.os.Looper.loop(Looper.java:123)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.ActivityThread.main(ActivityThread.java:4363)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at java.lang.reflect.Method.invokeNative(Native Method)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at java.lang.reflect.Method.invoke(Method.java:521)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at dalvik.system.NativeStart.main(Native Method)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): Caused by: java.lang.NullPointerException
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at com.phonegap.DroidGap.onPause(DroidGap.java:736)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at com.worklight.androidgap.WLDroidGap.onPause(WLDroidGap.java:163)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.Activity.performPause(Activity.java:3782)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1190)
01-03 14:49:00.680: ERROR/AndroidRuntime(22536): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3149)
這裏是我的代碼:
buttonClickListener = new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
AlertDialog.Builder dlg = new AlertDialog.Builder(context);
dlg.setTitle(title);
dlg.setMessage(message);
dlg.setCancelable(false);
dlg.setPositiveButton(buttonText, buttonClickListener);
dlg.create();
dlg.show();
buttonClickListener在dlg.setPositiveButton中使用它爲空,所以當你點擊肯定按鈕時,你開始NPE – Selvin 2012-01-03 13:33:48
在代碼中com.phonegap.DroidGap.onPause(DroidGap.java:736)'' ?當然你沒有什麼奇怪的東西? – tidbeck 2012-01-03 13:34:56
你能寫我們在736行DroidGap.java上有什麼嗎?另外我很好奇在WLDroidGap.java上的第163行。那裏肯定有一些問題。 – 2012-01-03 13:52:48