問題描述

如何使用 Clear Button 清除布局中的所有 EditText 字段.我有一個注冊活動，它有大約 10 個不同的 EditTexts.我知道我可以去獲取每個具體的引用，然后 set.Text("");但我正在尋找一種更有活力的優雅方式.可能抓取 Layout 并遍歷其中的所有項目以查找 EditText 類型，然后將它們設置為 "".不知道如何做到這一點，并嘗試在網上搜索它，但沒有運氣.有示例代碼嗎?

How do I clear all the EditText fields in a layout with a Clear Button. I have a registration Activity that has about 10 different EditTexts. I know I could go and grab a reference to each specifically and then set.Text(""); But I am looking for a more dynamic elegant way. Possibly grab the Layout and loop through all the items in there looking for EditText types and then setting those to "". Not sure how to do that though and tried searching on the web for it but no luck. Any sample code?

推薦答案

@Pixie 的回答很棒，但我想讓它變得更好.

The answer by @Pixie is great but I would like to make it much better.

僅當所有 EditText 都在一個(一個)布局中時，此方法才能正常工作，但當有一堆嵌套布局時，此代碼不會處理它們.

This method works fine only if all the EditText are in a single(one) layout but when there are bunch of nested layouts this code doesn't deal with them.

在摸索了一會兒后，我提出了以下解決方案:

After scratching my head a while I've made following solution:

private void clearForm(ViewGroup group) {       
    for (int i = 0, count = group.getChildCount(); i < count; ++i) {
        View view = group.getChildAt(i);
        if (view instanceof EditText) {
            ((EditText)view).setText("");
        }

        if(view instanceof ViewGroup && (((ViewGroup)view).getChildCount() > 0))
            clearForm((ViewGroup)view);
    }
}

要使用此方法，只需按以下方式調用它:

To use this method just call this in following fashion:

clearForm((ViewGroup) findViewById(R.id.sign_up));

您可以在其中將您的 R.id.sign_up 替換為您的 XML 文件的根布局的 id.

Where you can replace your R.id.sign_up with the id of root layout of your XML file.

我希望這能幫助很多像我一樣的人.

I hope this would help many people as like me.

:)

這篇關于Android使用清除按鈕清除所有EditText字段的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！