我有一個簡單的計時器,它是與onTick方法的工作。我有兩個文本框分鐘和秒,但它崩潰時,其中一個是空的。我怎樣才能管理這兩個TextBox? 這是我的onClick方法對我啓動計時器按鈕的代碼。得到分和秒的Android定時器
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.startTimer:
//If CountDownTimer is null then start timer
if (countDownTimer == null) {
String getMinutes = minutes.getText().toString();//Get minutes from Minutes EditText
String getSeconds = seconds.getText().toString();//Get seconds from Seconds EditText
//Check validation over EditText
if ((!getMinutes.equals("") && getMinutes.length() > 0)) {
int noOfMinutes = Integer.parseInt(getMinutes) * 60 * 1000;//Convert minutes into milliseconds
int noOfSeconds=Integer.parseInt(getSeconds) * 1000;//Convert Seconds into milliseconds
time = noOfMinutes + noOfSeconds;
startTimer(time);//start countdown
startTimer.setText(getString(R.string.stop_timer));//Change Text
} else
Toast.makeText(MainActivity.this, "Please enter no. of Minutes.", Toast.LENGTH_SHORT).show();//Display toast if Minute EditText is empty
} else {
//else stop timer and change text
stopCountdown();
startTimer.setText(getString(R.string.start_timer));
}
break;
case R.id.resetTimer:
stopCountdown();//stop count down
startTimer.setText(getString(R.string.start_timer));//Change text to Start Timer
countdownTimerText.setText(getString(R.string.timer));//Change Timer text
break;
}
}
當getSeconds EdidtTex是空的,有這種錯誤日誌貓:
錯誤:
七月八日至17日:48:26.402 3789-3789/amir.app.pro .my_timer2 E/AndroidRuntime:致命例外:main java.lang.NumberFormatException:Invalid int:「」 at java.lang.Integer.invalidInt(Integer.java:138) at java.lang.Integer.parseInt(Integer。 java:359) at android.view.View.performClick(View.java: 4204) 在android.view.View $ PerformClick.run(View.java:17355) 在android.os.Handler.handleCallback(Handler.java:725) 在android.os.Handler.dispatchMessage(Handler.java: 92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5041) at java.lang.reflect.Method.invokeNative(Native Method) 在java.lang.reflect.Meth od.invoke(Method.java:511) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:793) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java: 560) 在dalvik.system.NativeStart.main(本機方法)
它指的是這一行:
int noOfMinutes = Integer.parseInt(getMinutes) * 60 * 1000;
請張貼異常的logcat的,謝謝! – TR4Android