使用Handler延迟处理TextWatcher事件，以便在用户完成输入后才触发事件。以下是代码示例：

private EditText editText;
private Handler handler = new Handler();
private Runnable runnable;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    editText = findViewById(R.id.edit_text);

    editText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            // Do nothing
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            // Cancel any pending events and schedule a new one
            handler.removeCallbacks(runnable);
            runnable = new Runnable() {
                @Override
                public void run() {
                    // Process text input here
                }
            };
            handler.postDelayed(runnable, 500); // Delay for 500 milliseconds
        }

        @Override
        public void afterTextChanged(Editable s) {
            // Do nothing
        }
    });
}

在上面的示例中，将新的事件延迟处理500毫秒，可以根据您的需求调整此值。这样，当用户停止输入500毫秒后，TextWatcher事件才会被触发。