android - AlertDialog上的Android RatingBar

当我运行下面的代码段时，在RatingBar上显示AlertDialog时，出现以下错误。错误是

java.lang.IllegalStateException: Could not execute method of the activity

我尝试注释掉“ rB.setOnRatingBarChangeListener（new OnRatingBarChangeListener（）....”）部分，并且我的评分栏可以在alertdialog上很好地显示出来。真的很感激任何帮助。非常感谢

            AlertDialog.Builder builder;
            AlertDialog alertDialog;

            Context mContext = getApplicationContext();

            LayoutInflater inflater = (LayoutInflater)

            mContext.getSystemService(LAYOUT_INFLATER_SERVICE);

            View layout = inflater.inflate(R.layout.review_app, (ViewGroup) findViewById(R.id.layout_root));

            builder = new AlertDialog.Builder(this);
            builder.setView(layout);

            final RatingBar rB = (RatingBar)findViewById(R.id.Rating01);
            final TextView ratingdefinition = (TextView) findViewById(R.id.ratingdefinition);


            rB.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {

                public void onRatingChanged(RatingBar ratingBar, float rating,  boolean fromUser) {

                     final int numStars = ratingBar.getNumStars();
                     Log.v("number of stars", " " + numStars);
                     switch(numStars)
                     {
                        case(1):
                        {
                            ratingdefinition.setText("Poor");
                            break;
                        }
                        case(2):
                        {
                            ratingdefinition.setText("Below average");
                            break;
                        }
                        case(3):
                        {
                            ratingdefinition.setText("Average");
                            break;
                        }
                        case(4):
                        {
                            ratingdefinition.setText("Above average");
                            break;
                        }
                        case(5):
                        {
                            ratingdefinition.setText("Excellent!");
                            break;
                        }
                     }

                }
                });

            alertDialog = builder.create();
            alertDialog.show();
        }

logcat错误是：

08-15 09:49:02.789: WARN/dalvikvm(747): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-15 09:49:02.859: ERROR/AndroidRuntime(747): FATAL EXCEPTION: main
08-15 09:49:02.859: ERROR/AndroidRuntime(747): java.lang.IllegalStateException: Could not execute method of the activity
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.view.View$1.onClick(View.java:2072)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.view.View.performClick(View.java:2408)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.view.View$PerformClick.run(View.java:8816)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.os.Handler.handleCallback(Handler.java:587)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.os.Looper.loop(Looper.java:123)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.app.ActivityThread.main(ActivityThread.java:4627)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at java.lang.reflect.Method.invokeNative(Native Method)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at java.lang.reflect.Method.invoke(Method.java:521)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at dalvik.system.NativeStart.main(Native Method)
08-15 09:49:02.859: ERROR/AndroidRuntime(747): Caused by: java.lang.reflect.InvocationTargetException
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at com.Maxis.Mplanet.IndividualApp.clickHandler(IndividualApp.java:293)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at java.lang.reflect.Method.invokeNative(Native Method)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at java.lang.reflect.Method.invoke(Method.java:521)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.view.View$1.onClick(View.java:2067)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     ... 11 more
08-15 09:49:02.859: ERROR/AndroidRuntime(747): Caused by: java.lang.NullPointerException: println needs a message
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.util.Log.println_native(Native Method)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     at android.util.Log.v(Log.java:101)
08-15 09:49:02.859: ERROR/AndroidRuntime(747):     ... 15 more

最佳答案

不要设置RatingBarChangeListener。设置OndismissListener或覆盖OnDismiss（Dialog），您可以在其中访问评级栏的当前值。

样例代码：

alertDialog.setOnDismissListener(new OnDismissListener(..) {
    void onDismiss(DialogInterface dlg) {
        // find the rating bar and get its value.
        // hold the alert dlg view in activity class and use it here.
        // The one you set using alertDialog.setView
        mAlertDialogView.findViewbyid(R.id.ratingbar);
    }
});