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要實現TextView文本與輸入框聯動,可以使用TextWatcher監聽輸入框的文本變化,然后將輸入的文本設置到TextView中。以下是一個簡單的示例代碼:
EditText editText = findViewById(R.id.editText);
TextView textView = findViewById(R.id.textView);
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// This method is called to notify you that, within s, the count characters beginning at start are about to be replaced by new text with length after.
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// This method is called to notify you that, within s, the count characters beginning at start have just replaced old text that had length before.
textView.setText(s.toString());
}
@Override
public void afterTextChanged(Editable s) {
// This method is called to notify you that somewhere within s, the text has been changed.
}
});
在這個示例中,我們將輸入框的文本變化監聽器添加到EditText中,然后在onTextChanged方法中將輸入框中的文本設置到TextView中,從而實現了TextView文本與輸入框聯動的效果。
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