android - TextInputEditText 在具有数据绑定(bind)的输入上卡住

Question

我将 TextInputEditText 与 databinding 一起使用 - 直到最近它运行良好。这是出现此问题的布局之一:

            <android.support.design.widget.TextInputLayout
                android:id="@+id/new_pass_confirm"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:hint="@string/new_pass_confirm_hint"
                app:errorEnabled="true"
                app:passwordToggleEnabled="true">

                <android.support.design.widget.TextInputEditText
                    android:id="@+id/new_pass_confirm_et"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:enabled="@{viewmodel.enabled &amp;&amp; !viewmodel.progress}"
                    android:imeOptions="actionDone"
                    android:inputType="textPassword"
                    android:maxLines="1"
                    android:text="@={viewmodel.newPassConfirm}"
                    android:textSize="18sp" />

            </android.support.design.widget.TextInputLayout>

但现在每当用户尝试输入任何内容时，应用程序就会卡住并且 logcat 会一遍又一遍地被重复的消息淹没:

V/InputMethodManager: Starting input: tba=android.view.inputmethod.EditorInfo@ccaf106 nm : package.my ic=com.android.internal.widget.EditableInputConnection@87ca3c7
I/InputMethodManager: startInputInner - mService.startInputOrWindowGainedFocus
V/InputMethodManager: Starting input: tba=android.view.inputmethod.EditorInfo@e26ddb nm : package.my ic=com.android.internal.widget.EditableInputConnection@43b078
I/InputMethodManager: startInputInner - mService.startInputOrWindowGainedFocus
V/InputMethodManager: Starting input: tba=android.view.inputmethod.EditorInfo@4fff78e nm : package.my ic=com.android.internal.widget.EditableInputConnection@43ddbaf
I/InputMethodManager: startInputInner - mService.startInputOrWindowGainedFocus
W/IInputConnectionWrapper: getCursorCapsMode on inactive InputConnection

如果我删除 android:text="@={viewmodel.newPassConfirm}" 问题就会消失 看起来问题出在 val newPassConfirm = ObservableField("")试图在无限循环中更改 xml 字段

直到几天前它都运行良好我试过的:

• 删除 android:imeOptions="actionDone"

• 删除 android:inputType="textPassword"

• 从 View 层中删除了以下各项:

  binding.newPassConfirm.setOnClickListener(v -> binding.newPassConfirm.setError(null));
  
  binding.newPassConfirmEt.addTextChangedListener(new DefaultTextWatcher() {
          @Override
          public void afterTextChanged(Editable s) {
              binding.newPassConfirm.setError(null);
          }
      });
  
  binding.newPassConfirmEt.setOnEditorActionListener(
                  (v, actionId, event) -> {
                      if (actionId == EditorInfo.IME_ACTION_DONE
                              || event.getAction() == KeyEvent.ACTION_DOWN
                              && event.getKeyCode() == KeyEvent.KEYCODE_ENTER) {
                          mViewModel.onOkClick();
                          return true;
                      }
                      return false;
                  });
  

Answer 1

错误原因是DataBindingAdapter中的这个方法

@BindingAdapter("android:text")
public static void setText(TextView textView, String text) {
    textView.setText(text != null ? text : "");
}

它可能会循环使用数据绑定(bind)代码，从而导致大量滞后