VIVO手机上del键无效OnKeyListener不响应的原因及解决方法

public class ZanyEditText extends EditText {
  private OnDelKeyEventListener delKeyEventListener;
  public ZanyEditText(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }
  public ZanyEditText(Context context, AttributeSet attrs) {
    super(context, attrs);
  }
  public ZanyEditText(Context context) {
    super(context);
  }
  @Override
  public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
    return new ZanyInputConnection(super.onCreateInputConnection(outAttrs),
        true);
  }
  private class ZanyInputConnection extends InputConnectionWrapper {
    public ZanyInputConnection(InputConnection target, boolean mutable) {
      super(target, mutable);
    }
    @Override
    public boolean sendKeyEvent(KeyEvent event) {
      if (event.getAction() == KeyEvent.ACTION_DOWN
          && event.getKeyCode() == KeyEvent.KEYCODE_DEL) {
        if (delKeyEventListener != null) {
          delKeyEventListener.onDeleteClick();
          return true;
        }
      }
      return super.sendKeyEvent(event);
    }
    @Override
    public boolean deleteSurroundingText(int beforeLength, int afterLength) {
      if (beforeLength == 1 && afterLength == 0) {
        return sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN,
            KeyEvent.KEYCODE_DEL))
            && sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP,
            KeyEvent.KEYCODE_DEL));
      }
      return super.deleteSurroundingText(beforeLength, afterLength);
    }
  }
  /**
   *
   * 功能描述: 

   * 〈功能详细描述〉
   *
   * @param delKeyEventListener EditText删除回调
   */
  public void setDelKeyEventListener(OnDelKeyEventListener delKeyEventListener) {
    this.delKeyEventListener = delKeyEventListener;
  }
  public interface OnDelKeyEventListener {
    void onDeleteClick();
  }
}