Question

我已经尝试将EditText默认值设置为零，但是当编辑和删除时为“”（空白区域，编辑文本字段中没有更多的字词_

按下提交按钮时显示异常Invalid Int“”。你能告诉我如何解决这个例外吗？

以下是我的代码

    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的

    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

Answer 1

在你使用的aboue代码中，比如将String转换为Integer，在这种情况下，你不会将“”（空字符串）转换为整数

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

请确保字符串不为空转换。

检查String的长度是否应大于0.

if(monthlyTest.length()>0)

感谢.....

Answer 2

试

if(monthlyTest == null || monthlyTest.trim().equals("")){

您也可以使用

if(monthlyTest == null || monthlyTest.trim().isEmpty()){

Answer 3

使用try/catch块围绕有问题的行。

try {
    Log.d("Month" , monthlyTest);
    Log.d("freeMonths" , freeMonths);                               
    monthlyFeeforChannel =  Integer.parseInt(monthlyTest);                                      
    MonthlyFee.add(monthlyFeeforChannel);
    FreePeriod.add(freeMonths);
}
catch (NumberFormatException nfe) {
    nfe.printStackTrace();
    // Alert the user/log the error, etc.
}

Answer 4

我认为，你必须将它添加到你的编辑文本

editText.setHint("0");

Answer 5

如果输入类型设置为数字，则无法测试“空”，因此最好的解决方案是使用以下方法测试长度是否为零：

if(number.length() == 0) {EditText is empty!!!}

编辑文本显示异常无效的Int“”

5 个答案: