有没有一种方法来触发一个事件时，一个EditText视图的内容发生了变化？
问题描述：
我可以看到在设备火键特定查看与 onKey ，但这不火当软件键盘上的按键是pressed。
I can see keys on the device fire for a particular View with onKey, but this doesn't fire when keys on the software keyboard are pressed.
我试图构建一个动态 UI 的重新计算的值作为输入的变化，而它的变化。
I am trying to build a dynamic UI that recalculates a value as the input changes, while it's changing.
有没有一种方法来捕捉，要么价值的的EditText 有哪些变化？
Is there a way to capture either that the value of the EditText has changed?
答
是的，你只需要添加一个TextChangedListener：
Yeah, you just need to add a TextChangedListener:
textEdit.addTextChangedListener(new TextWatcher(){
@Override
public void afterTextChanged(Editable editable)
{
// Do Stuff
}
@Override
public void beforeTextChanged(CharSequence text, int start, int count, int after)
{
// Do Stuff
}
@Override
public void onTextChanged(CharSequence arg0, int start, int before, int count)
{
// Do Stuff
}
});
您可以在这里找到更多的信息：
You can find more info here:
http://developer.android.com/intl/de/reference/android/text/TextWatcher.html