如何正确关闭Android中的警报对话框？

Question

我正在使用以下代码向用户显示基本的文本框输入.

一切都很好.但是,第二次调用对话框时,应用程序崩溃了.

我怀疑这是因为我没有破坏我添加到View中的EditText.那么......对于那些比我更有经验的人来说......处理这个问题的正确方法是什么？

下面是我的代码和LogCat

final EditText ipInput = new EditText(this);
    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setView(ipInput);
    builder.setTitle("Enter Server IP Address: ");
    builder.setPositiveButton("Save", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            //STORE IP ADDRESS
        }
    });

    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            //CANCELLED
        }
    });
    builder.create();

而"展示":

settings.setOnClickListener(new OnClickListener(){
        public void onClick(View view){
            builder.show();
        }
    });

堆栈跟踪:

02-24 02:08:55.759: E/AndroidRuntime(582): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.view.ViewGroup.addViewInner(ViewGroup.java:3011)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.view.ViewGroup.addView(ViewGroup.java:2900)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.view.ViewGroup.addView(ViewGroup.java:2880)
02-24 02:08:55.759: E/AndroidRuntime(582):  at com.android.internal.app.AlertController.setupView(AlertController.java:401)
02-24 02:08:55.759: E/AndroidRuntime(582):  at com.android.internal.app.AlertController.installContent(AlertController.java:241)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.app.AlertDialog.onCreate(AlertDialog.java:314)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.app.Dialog.dispatchOnCreate(Dialog.java:335)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.app.Dialog.show(Dialog.java:248)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.app.AlertDialog$Builder.show(AlertDialog.java:907)
02-24 02:08:55.759: E/AndroidRuntime(582):  at pirelli.app.ScanBarcode$4.onClick(ScanBarcode.java:90)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.view.View.performClick(View.java:3110)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.view.View$PerformClick.run(View.java:11934)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.os.Handler.handleCallback(Handler.java:587)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.os.Handler.dispatchMessage(Handler.java:92)
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.os.Looper.loop(Looper.java:132)  
02-24 02:08:55.759: E/AndroidRuntime(582):  at android.app.ActivityThread.main(ActivityThread.java:4123)
02-24 02:08:55.759: E/AndroidRuntime(582):  at java.lang.reflect.Method.invokeNative(Native Method)
02-24 02:08:55.759: E/AndroidRuntime(582):  at java.lang.reflect.Method.invoke(Method.java:491)
02-24 02:08:55.759: E/AndroidRuntime(582):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
02-24 02:08:55.759: E/AndroidRuntime(582):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
02-24 02:08:57.150: I/Process(582): Sending signal. PID: 582 SIG: 9

Answer 1

我看待它的方式,问题不在于Alarm Dialog Builder的终结性,而在于Button的终结性.我这样改变了你的代码:

   private Context ctx;
   AlertDialog.Builder builder;
   EditText ipInput ;

  settings.setOnClickListener(new OnClickListener(){
         ipInput = new EditText(ctx);
         builder.setView(ipInput);
         builder.show();    
       }
   });

(更改了构建器和EditText的"最终结果",并为每次调用重新创建了EditText).我在OnCreate中初始化了上下文和构建器:

    ctx = this.getApplicationContext();
    builder =   new AlertDialog.Builder(this);