Android:Android 4.1 模拟器从 DatePicker 对话框调用 onDateSet 两次 [英] Android: Android 4.1 Emulator Invoking onDateSet Twice from DatePicker Dialog

问题描述

我的应用程序在我的 Android 2.2 模拟器上运行良好.然后我决定在 Android 4.1 模拟器上进行测试.DatePickerDialog 看起来有点不同，出于某种原因，当我按下完成"时，onDateSet() 侦听器被调用两次并导致我的应用程序出现问题.

My application was working perfectly on my Android 2.2 emulator. I then decided to test on an Android 4.1 emulator. The DatePickerDialog looks a little different and for some reason when I press on "Done", the onDateSet() listener gets called twice and causes problems in my application.

我知道这是因为每当我点击完成"时，代码中下面显示的日志就会打印两次

I know this because the log shown below in the code is printed twice whenever I click on "Done"

mDateSetListener = new DatePickerDialog.OnDateSetListener() {
    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            Log.v("onDateSet", "ENTERED");
            //rest of code...
    }};

Android 2.2 日期选择器

Android 2.2 DatePicker

Android 4.1 日期选择器

Android 4.1 DatePicker

推荐答案

尝试设置一个布尔值来检查同一对话框中的双重触发.类似于:

Try setting a boolean to check for a double fire within the same dialog. Something similar to:

Calendar c = Calendar.getInstance();
c.add(Calendar.DAY_OF_YEAR, 1);
final DatePickerDialog dateDialog = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
    boolean fired = false;
    public void onDateSet(final DatePicker view, final int year, final int monthOfYear, final int dayOfMonth) {
        Log.i("PEW PEW", "Double fire check");
        if (fired) {
            Log.i("PEW PEW", "Double fire occured. Silently-ish returning");
            return;
        } else {
            //first time fired
            fired = true;
        }
        //Normal date picking logic goes here
    }
}, c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
dateDialog.show();

TimePickerDialog 的 onTimeSet 也会发生这种双重触发问题，并且此检查也适用于这些问题.

This double fire issue also happens with onTimeSet of a TimePickerDialog and this check also works for those.

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