如何从AlertDialog退出应用程序

Question

我正在尝试做一个非常简单的事情,只用一个按钮显示警报,如果点击我希望关闭对话框而不是应用程序退出\ finish()

目前我正在设备上获得通用警报:

应用程序意外停止.请再试一次

在LogCat中我得到:无法暂停活动

这是日志:

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)

这是我的代码:

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();

Answer 1

尝试System.exit(0)而不是finish()