安卓EDITTEXT：当检测到用户停止编辑

问题描述

我有重新present输入的搜索条件的EDITTEXT。我想知道如果有一种方式，当用户停止编辑这个EDITTEXT这样我就可以查询数据库为我的列表数据来检测。例如，如果用户键入测试我想要被通知后才用户键入的文本，而不是之后用户键入每个字母，如文本观察家一样。你有什么想法？我会避免使用一些定时器来衡量毫秒关键preS事件的经过。

I have an editText which represent an input for a search criteria. I want to know if there is a way to detect when user stops editing this editText so I can query the db for data for my list. For example, if the user types "test" I want to be notified only after user has typed the word, not after user types each letter, like text watcher does. Do you have any ideas? I would avoid to use some timer to measure milliseconds elapsed between key pres events.

推荐答案

不令人难以置信的优雅，但这应该工作。

Not incredibly elegant, but this should work.

初​​始化：

long idle_min = 4000; // 4 seconds after user stops typing
long last_text_edit = 0;
Handler h = new Handler();
boolean already_queried = false;

设置你可运行的，将被从文本观察家称为：

Set up your runnable that will be called from the text watcher:

private Runnable input_finish_checker = new Runnable() {
    public void run() {
            if (System.currentTimeMillis() > (last_text_edit + idle_min - 500)) {
                 // user hasn't changed the EditText for longer than
                 // the min delay (with half second buffer window)
                 if (!already_queried) { // don't do this stuff twice.
                     already_queried = true;
                     do_stuff();  // your queries
                 }
            }
    }
};

在文本观察家将这个：

last_text_edit = System.currentTimeMillis();
h.postDelayed(input_finish_checker, idle_min);

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