問題描述

我需要檢測 EditText 中軟鍵盤或硬鍵盤上的每個(gè)按鍵.我只需要在按下字符時(shí)一次發(fā)送一個(gè)字符，不需要最終的文本字符串.

I need to detect every key press on either a soft or hard keyboard in EditText. I just need to send the characters one at a time as they are pressed and don't need the final text string.

我曾嘗試將 EditText 與 onKeyPress 一起使用，但我在這里遇到了問題，即無法使用軟鍵盤和 TextWatcher 進(jìn)行按鍵操作不是一個(gè)好的選擇，因?yàn)槲倚枰總€(gè)按鍵.是否有任何解決方案可以知道所有按鍵(包括返回、移位、回車...也)?

I have tried using an EditText with onKeyPress, but I ran into the problems here with not getting key presses with soft keyboards and TextWatcher isn't a good option because I need each key press. Is there any solution to know all the keypresses (including back, shift, enter... also)?

推薦答案

如果你有一個(gè)EditText，那么你可以使用TextWatcher接口.在我的代碼中，search_edit 是一個(gè) EditText.

If you have an EditText, then you can use the TextWatcher interface. In my code, search_edit is an EditText.

search_edit.addTextChangedListener(new TextWatcher() {          
    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {                                   
        //here is your code
        myadapter.getFilter().filter(s);
        listview.setAdapter(myadapter); 
    }                       
    @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                  
    }
});

這篇關(guān)于如何知道 EditText 中的按鍵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(wǎng)！