afterTextChanged（）回调被称为无文本被实际改变 [英] afterTextChanged() callback being called without the text being actually changed

问题描述

我有一个片段的EditText 和里面的 onCreateView（）我添加了一个 TextWatcher 到的EditText 。

I have a fragment with an EditText and inside the onCreateView() I add a TextWatcher to the EditText.

每个被加入第二次的片段时间 afterTextChanged（编辑S）回调被调用而没有被修改的文本。

Each time the fragment is being added for the second time afterTextChanged(Editable s) callback is being called without the text ever being changed.

下面是一个code片断：

Here is a code snippet :

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
...
    myEditText = (EditText) v.findViewById(R.id.edit_text);
    myEditText.addTextChangedListener(textWatcher);
...
}

TextWatcher textWatcher = new TextWatcher() {

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        searchProgressBar.setVisibility(View.INVISIBLE);
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void afterTextChanged(Editable s) {
        Log.d(TAG, "after text changed");
    }
}

我还设置了片段保留其状态，我把片段的实例在活动。

I also set the fragment to retain its state, and I keep the instance of the fragment in the activity.

推荐答案

编辑解决方案：

，因为它似乎文本从片段连接，因为该片段恢复的意见previous状态，第二次改变。

As it seems the text was changed from the second time the fragment was attached because the fragment restored the previous state of the views.

我的解决办法是添加在文本观察家的 onResume（）自从恢复了状态的前的 onResume 被调用。

My solution was adding the text watcher in the onResume() since the state was restored before the onResume was called.

@Override
public void onResume() {
    super.onResume();
    myEditText.addTextChangedListener(textWatcher);
}

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