DatePicker和TimePicker崩潰時，我按下設置按鈕

Question

我正在做一個信使，日期和時間選擇器彈出時，我點擊按鈕。當我按下設置按鈕來顯示它們時，應用程序崩潰。我的代碼是：

private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() { 
    @Override 
    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { 
     yearSet = year; 
     monthSet = monthOfYear + 1; 
     daySet = dayOfMonth; 
     btnDate.setText(yearSet + monthSet + daySet); 
     } 
    }; 

    private TimePickerDialog.OnTimeSetListener timePickerListener = new TimePickerDialog.OnTimeSetListener() { 
    @Override 
    public void onTimeSet(TimePicker view, int hour, int minute) { 
     hourSet = hour; 
     minuteSet = minute; 
     btnTime.setText(hourSet + minuteSet); 
     } 
    }; 

logcat的：

E/AndroidRuntime: FATAL EXCEPTION: main 
      android.content.res.Resources$NotFoundException: String resource ID #0x7f4 
      at android.content.res.Resources.getText(Resources.java:1068) 
      at android.widget.TextView.setText(TextView.java:4546) 
      at devncode.kemo.testApp.SendMessageActivity$3.onDateSet(SendMessageActivity.java:95) 
      at android.app.DatePickerDialog.tryNotifyDateSet(DatePickerDialog.java:199) 
      at android.app.DatePickerDialog.onClick(DatePickerDialog.java:154) 
      at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:185) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:176) 
      at android.app.ActivityThread.main(ActivityThread.java:5419) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:525) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862) 
      at dalvik.system.NativeStart.main(Native Method) 

Answer 1

你的問題是，您要設置不同項目的文本爲整數。例如btn.setText(int);，它應該是一個字符串btn.setText(String);

所以要解決它，只要你有類似的東西

btnTime.setText(hourSet + minuteSet); 

將其更改爲

btnTime.setText(hourSet + minuteSet + ""); 

添加+ ""會投它作爲一個字符串，而不是給出一個錯誤。