使用“CustomTextWatcher”的想法，我做到了
1) 创建了一个新的 TextWatcherListener 接口：
public interface TextWatcherExtendedListener extends NoCopySpan
{
public void afterTextChanged(View v, Editable s);
public void onTextChanged(View v, CharSequence s, int start, int before, int count);
public void beforeTextChanged(View v, CharSequence s, int start, int count, int after);
}
2）创建和使用 EditTextExtended 而不是 EditText（在我的情况下）：
public class EditTextExtended extends EditText
{
private TextWatcherExtendedListener mListeners = null;
public EditTextExtended(Context context)
{
super(context);
}
public EditTextExtended(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public EditTextExtended(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}
public void addTextChangedListener(TextWatcherExtendedListener watcher)
{
if (mListeners == null)
{
mListeners = watcher;
}
}
public void removeTextChangedListener(TextWatcherExtendedListener watcher)
{
if (mListeners != null)
{
mListeners = null;
}
}
void sendBeforeTextChanged(CharSequence text, int start, int before, int after)
{
if (mListeners != null)
{
mListeners.beforeTextChanged(this, text, start, before, after);
}
}
void sendOnTextChanged(CharSequence text, int start, int before,int after)
{
if (mListeners != null)
{
mListeners.onTextChanged(this, text, start, before, after);
}
}
void sendAfterTextChanged(Editable text)
{
if (mListeners != null)
{
mListeners.afterTextChanged(this, text);
}
}
}
3) 那么，你需要在哪里写下这段代码：
myEditTextExtended.addTextChangedListener(this) //Let implement TextWatcherExtendedListener methods
4) 使用它们：
@Override
public void onTextChanged(View v, CharSequence s, int start, int before, int count)
{
//Tested and works
//do your stuff
}
@Override
public void beforeTextChanged(View v, CharSequence s, int start, int count, int after)
{
//not yet tested but it should work
}
@Override
public void afterTextChanged(View v, Editable s)
{
//not yet tested but it should work
}
好吧，让我知道你的想法。