Question

我有一个EditText。当我点击它时，它变得可聚焦。我将输入要输入EditText的输入文本。我想为EditText实现一个监听器，这样当我停止输入时，它应该自动将该文本保存到数据库中而不是一个按钮。如何让EditText的监听器听取是否停止输入？

Answer 1

试试这样。

EditText et = (EditText)findViewById(R.id.editText);
Log.e("TextWatcherTest", "Set text xyz");
et.setText("xyz");

et.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) { }
    @Override
    public void afterTextChanged(Editable s) {
        Log.e("TextWatcherTest", "afterTextChanged:\t" +s.toString());
    }
});

Answer 2

设置edittext imeOption

editText.setImeOptions(EditorInfo.IME_ACTION_DONE);

通过使用这样的东西，

editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        if (actionId == EditorInfo.IME_ACTION_DONE) {
            // Specify your database function here.
            return true;
        }
        return false;
    }
});

或者，您可以使用OnEditorActionListener接口来避免匿名内部类。

Answer 3

将此添加到您的editText

et1.addTextChangedListener(new TextWatcher() {
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

            // TODO Auto-generated method stub
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            // TODO Auto-generated method stub
        }

        @Override
        public void afterTextChanged(Editable s) {

            // TODO Auto-generated method stub
        }
    });

Answer 4

还可以使用Rx Java的 debounce 运算符。

let myCustomButtonWithBackgroundsAndStuff = UIButton(type: .custom)
...

// this is the equivalent of connecting the IBAction, in code form, in case you didn't know
myCustomButtonWithBackgroundsAndStuff.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
let barButtonItem = UIBarButtonItem(customView: myCustomButton)
navigationItem.rightBarButtonItem = barButtonItem
// or append to rightBarButtonItems if you have other bar button items

...
@objc func buttonAction() {
    ...
}

您可以在此处定义时间限制，在将其保存到数据库中的时间之后。

为EditText实现Text Watcher

4 个答案: