当用户从自动完成建议中选择文本时,我想添加空间,因此当他继续键入时,他将从一个新词开始。
我尝试使用TextWatcher
来做到这一点,但得到了IndexOutOfBoundsException
。
有什么建议?
我使用的文本查看器是:
private class AddSpaceTextWatcher implements TextWatcher{
boolean shouldAddSpace = false;
@Override
public void beforeTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (count - before > 1) // check that the new input is not from the keyboard
shouldAddSpace = true;
}
@Override
public void afterTextChanged(Editable editable) {
if (shouldAddSpace) {
shouldAddSpace = false;
mAutoCompleteTextView.setText(" ");
}
}
}
我得到的异常(exception)是:
java.lang.IndexOutOfBoundsException: setSpan (18 ... 18) ends beyond length 1
at android.text.SpannableStringBuilder.checkRange(SpannableStringBuilder.java:1018)
at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:611)
at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:607)
at android.text.Selection.setSelection(Selection.java:76)
at android.text.Selection.setSelection(Selection.java:87)
at android.widget.EditText.setSelection(EditText.java:99)
at android.widget.SearchView.setQuery(SearchView.java:1465)
at android.widget.SearchView.onQueryRefine(SearchView.java:889)
at android.widget.SuggestionsAdapter.onClick(SuggestionsAdapter.java:371)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19748)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)
最佳答案
要选择多个项目,您可以简单地使用MultiAutoCompleteTextView
,它是为此目的而专门构建的AutoCompleteTextView
的子类。
或者
如果您只想在末尾添加一个空格,则只能选择一项,然后尝试以下操作:
public void afterTextChanged(Editable editable) {
String text = editable.toString();
if (shouldAddSpace && text.length() > 0 && !text.endsWith(" ")) {
editable.append(' ');
}
}
编辑:
附加空格后,您只需调用
mAutoCompleteTextView.showDropDown();
即可再次显示带有更新文本的下拉菜单。