问题描述

我已经尝试将 EditText 默认值设置为零，但是当涉及到编辑和擦除为"(空白，编辑文本字段中没有更多的措辞 _

I have already tried setting the EditText default value to be zero but when it comes to editing and erase as "" ( empty space , no more wordings _ in the Edit Text field

按下提交按钮时显示异常 Invalid Int "".你能告诉我如何解决这个异常吗?

It shows exception Invalid Int "" when pressing submitt button . Could you please tell me how to resolve this exception ?

下面是我的代码

    for (int j = 0; j < selectedChannels; j++) {

        lconper = (Spinner) findViewById (j+120);
        int monthlyFeeforChannel = 0;       
        contractPeriodSelected.add((String) lconper.getSelectedItem());

        String monthlyTest = txtMonthlyFee[j].getText().toString().trim();
        String freeMonths = txtFreePeriod[j].getText().toString().trim();

        if(monthlyTest.trim()==null || monthlyTest.trim()==""){
            new AlertDialog.Builder(this)
            .setTitle("Warning")
            .setMessage(
                    "You must fill in Monthly Fees for subscribed channels!")
                    .setNeutralButton("OK",
                            new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog,
                                int id) {
                            // if this button is clicked, close
                            // current activity
                            dialog.cancel();
                        }});
            break;
        }
        else
        {
            Log.d("Month" , monthlyTest);
            Log.d("freeMonths" , freeMonths);                               
            monthlyFeeforChannel =  Integer.parseInt(monthlyTest);                                      
            monthlyFee.add(monthlyFeeforChannel);
            FreePeriod.add(freeMonths);     
        }   
    }

Logcat

    06-20 13:52:03.711: E/AndroidRuntime(17713): FATAL EXCEPTION: main
06-20 13:52:03.711: E/AndroidRuntime(17713): java.lang.IllegalStateException: Could not execute method of the activity
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.view.View$1.onClick(View.java:3130)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.view.View.performClick(View.java:3652)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.view.View$PerformClick.run(View.java:14354)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.os.Handler.handleCallback(Handler.java:605)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.os.Handler.dispatchMessage(Handler.java:92)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.os.Looper.loop(Looper.java:137)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.app.ActivityThread.main(ActivityThread.java:4519)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at java.lang.reflect.Method.invokeNative(Native Method)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at java.lang.reflect.Method.invoke(Method.java:511)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:561)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at dalvik.system.NativeStart.main(Native Method)
06-20 13:52:03.711: E/AndroidRuntime(17713): Caused by: java.lang.reflect.InvocationTargetException
06-20 13:52:03.711: E/AndroidRuntime(17713):    at java.lang.reflect.Method.invokeNative(Native Method)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at java.lang.reflect.Method.invoke(Method.java:511)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at android.view.View$1.onClick(View.java:3125)
06-20 13:52:03.711: E/AndroidRuntime(17713):    ... 11 more
06-20 13:52:03.711: E/AndroidRuntime(17713): Caused by: java.lang.NumberFormatException: Invalid int: ""
06-20 13:52:03.711: E/AndroidRuntime(17713):    at java.lang.Integer.invalidInt(Integer.java:138)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at java.lang.Integer.parseInt(Integer.java:359)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at java.lang.Integer.parseInt(Integer.java:332)
06-20 13:52:03.711: E/AndroidRuntime(17713):    at com.test.Eystem1.Confirm.submitOrder(Confirm.java:415)
06-20 13:52:03.711: E/AndroidRuntime(17713):    ... 14 more

推荐答案

在您使用的 aboue 代码中，例如将 String 转换为 Integer，在这种情况下，您不会将 ""(Empty String) 转换为 Integer

In the aboue code you have used like converting String to Integer in that case you will not convert ""(Empty String) to Integer

Integer.parseInt(monthlyTest);  // Here monthyTest value is ""

转换前请确保字符串不为空.

Please make sure the string is not empty befor conversion.

检查String的长度是否应该大于0.

Check the length of the String is should be greater than 0.

if(monthlyTest.length()>0)

谢谢.....

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