Android RecyclerView：notifyDataSetChanged()IllegalStateException

我正在尝试使用notifyDataSetChanged()更新recycleview的项目.

这是我在recycleview适配器中的onBindViewHolder()方法.

@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {

     //checkbox view listener
    viewHolder.getCheckbox().setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            //update list items
            notifyDataSetChanged();
        }
    });
}

我选中一个复选框后,我想要做的是更新列表项.我得到了一个非法的例外：“当RecyclerView计算布局或滚动时,无法调用此方法”

java.lang.IllegalStateException: Cannot call this method while RecyclerView is computing a layout or scrolling
    at android.support.v7.widget.RecyclerView.assertNotInLayoutOrScroll(RecyclerView.java:1462)
    at android.support.v7.widget.RecyclerView$RecyclerViewDataObserver.onChanged(RecyclerView.java:2982)
    at android.support.v7.widget.RecyclerView$AdapterDataObservable.notifyChanged(RecyclerView.java:7493)
    at android.support.v7.widget.RecyclerView$Adapter.notifyDataSetChanged(RecyclerView.java:4338)
    at com.app.myapp.screens.RecycleAdapter.onRowSelect(RecycleAdapter.java:111)

我也使用了notifyItemChanged(),同样的例外.任何秘密的更新方式,以通知适配器的东西发生了变化？

您应该将方法’setOnCheckedChangeListener()’移动到ViewHolder,它是适配器上的内部类.

onBindViewHolder()不是初始化ViewHolder的方法.
此方法是刷新每个回收物品的步骤.
当您调用notifyDataSetChanged()时,onBindViewHolder()将被调用为每个项目的次数.

因此,如果您将notifyDataSetChanged()放入onCheckChanged()并在onBindViewHolder()中初始化checkBox,则由于循环方法调用,您将获得IllegalStateException.

点击复选框 – > onCheckedChanged() – > notifyDataSetChanged() – > onBindViewHolder() – >设置复选框 – > onChecked …

简单地说,你可以通过在Adapter中放一个标志来解决这个问题.

试试这个,

private boolean onBind;

public ViewHolder(View itemView) {
    super(itemView);
    mCheckBox = (CheckBox) itemView.findViewById(R.id.checkboxId);
    mCheckBox.setOnCheckChangeListener(this);
}

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    if(!onBind) {
        // your process when checkBox changed
        // ...

        notifyDataSetChanged();
    }
}

...

@Override
public void onBindViewHolder(YourAdapter.ViewHolder viewHolder, int position) {
    // process other views 
    // ...

    onBind = true;
    viewHolder.mCheckBox.setChecked(trueOrFalse);
    onBind = false;
}