在EditText控件中更改文本0.5秒后，我该怎么办? [英] How can I do something 0.5 seconds after text changed in my EditText control?

问题描述

我正在使用EditText控件过滤列表.我想在用户完成输入EditText的 0.5秒后过滤列表.为此，我使用了 TextWatcher 的 afterTextChanged 事件.但是，此事件随着EditText中每个字符的更改而增加.

I am filtering my list using an EditText control. I want to filter the list 0.5 seconds after the user has finished typing in EditText. I used the afterTextChanged event of TextWatcher for this purpose. But this event rises for each character changes in EditText.

我该怎么办?

推荐答案

使用:

editText.addTextChangedListener(
    new TextWatcher() {
        @Override public void onTextChanged(CharSequence s, int start, int before, int count) { }
        @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { }

        private Timer timer = new Timer();
        private final long DELAY = 1000; // Milliseconds

        @Override
        public void afterTextChanged(final Editable s) {
            timer.cancel();
            timer = new Timer();
            timer.schedule(
                new TimerTask() {
                    @Override
                    public void run() {
                        // TODO: Do what you need here (refresh list).
                        // You will probably need to use
                        // runOnUiThread(Runnable action) for some
                        // specific actions (e.g., manipulating views).
                    }
                },
                DELAY
            );
        }
    }
);

诀窍是每次 EditText 中的文本被更改时，取消并重新安排 Timer .

The trick is in canceling and rescheduling Timer each time, when text in EditText gets changed.

有关设置延迟的时间，请参见这篇文章.

For how long to set the delay, see this post.

这篇关于在EditText控件中更改文本0.5秒后，我该怎么办?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！