Question

我有当前的适配器：

public class FolderImagesAdapter extends BaseAdapter {

    private List<String> mData;
    private Context mContext;

    public FolderImagesAdapter(Context context, List<String> data) {
        mContext = context;
        mData = data;
    }

    @Override
    public int getCount() {
        return mData.size();
    }

    @Override
    public Object getItem(int position) {
        return mData.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if(convertView == null) {
            convertView = new FolderImageItemView(mContext);
        }
        ((FolderImageItemView)convertView).setData(mData.get(position));

        return convertView;
    }

    public void setData(List<String> data) {
        mData = data;
    }
}

这是我的View类：

public class FolderImageItemView extends FrameLayout implements Checkable{

private ImageView mThumbnail;
private View mSelection;

private String mPath;
private boolean mChecked;
private SelectedImagesHolder mHolder;

public FolderImageItemView(Context context) {
    super(context);
    init();
}

private void init() {
    inflate(getContext(), R.layout.item_view_folder_image, this);
    mThumbnail = (ImageView)findViewById(R.id.iv_thumb);
    mSelection = findViewById(R.id.selection);
}

public void setData(String thumbPath){
    mPath = thumbPath;
    mHolder = SelectedImagesHolder.getInstance();
    Utils.toLog(mHolder.getmSelectedImages().toArray());
    Glide.with(getContext()).load(thumbPath).into(mThumbnail);
    if(mHolder.getmSelectedImages().contains(thumbPath)) {
        setChecked(true);
    }
}

@Override
public void setChecked(boolean checked) {
    mChecked = checked;
    if(mChecked) {
        mSelection.setVisibility(VISIBLE);
        if(!mHolder.getmSelectedImages().contains(mPath)) {
            mHolder.addImage(mPath);
        }
    } else {
        mSelection.setVisibility(GONE);
        //mHolder.removeImage(mPath);
    }
}

@Override
public boolean isChecked() {
    return mChecked;
}

@Override
public void toggle() {
    setChecked(!mChecked);
}

@Override
public boolean performClick() {
    toggle();
    return super.performClick();
}

}

问题是setData方法应检查项目，持有者已经拥有（持有者是单线）。 我有单数的数据，并且setChecked（true）正在运行，但是在setChecked（false）之后的某个地方调用所有项目并且所有项目都被取消选择。

我想知道这里有什么问题，我该如何解决呢。我已经搜索了这个并找到一些帖子，说明getView正在调用setChecked（false），但是setData方法在那里被调用，它应该可以工作。

Answer 1

所以，最终的解决方案并不是很好，但它正在发挥作用。首先是几件事：

performClick覆盖由于某种原因未触发，但setOnClickListener(this)和toggle有效（我猜它与处理ListView中的点击和此类ViewGroups有关就好了。
如果我删除了Checkable的工具，它将无法工作，因为我需要触发此setChecked

我的解决方案是简单地创建boolean mIsFromClick并仅在发生点击时将其设置为true，并且仅当此字段设置为true时才执行操作，因此，最终它们看起来像这样：

public class FolderImageItemView extends FrameLayout implements Checkable, OnClickListener {

    private ImageView mThumbnail;
    private View mSelection;

    private String mPath;
    private boolean mChecked;
    private boolean mIsFromClicked = false;
    private SelectedImagesHolder mHolder;

    public FolderImageItemView(Context context) {
        super(context);
        setOnClickListener(this);
        init();
    }

    private void init() {
        inflate(getContext(), R.layout.item_view_folder_image, this);
        mThumbnail = (ImageView)findViewById(R.id.iv_thumb);
        mSelection = findViewById(R.id.selection);
    }

    public void setData(String thumbPath){
        mPath = thumbPath;
        mHolder = SelectedImagesHolder.getInstance();
        Utils.toLog(mHolder.getmSelectedImages().toArray());
        Glide.with(getContext()).load(thumbPath).into(mThumbnail);
        if(mHolder.getmSelectedImages().contains(mPath)) {
            mIsFromClicked = true;
            setChecked(true);
        }
    }

    @Override
    public void setChecked(boolean checked) {
        //Utils.toLog(new Throwable());
        if(mIsFromClicked) {
            mChecked = checked;
            if (mChecked) {
                mSelection.setVisibility(VISIBLE);
                if (!mHolder.getmSelectedImages().contains(mPath)) {
                    mHolder.addImage(mPath);
                }
            } else {
                mSelection.setVisibility(GONE);
                mHolder.removeImage(mPath);
            }
            mIsFromClicked = false;
        }
    }

    @Override
    public boolean isChecked() {
        return mChecked;
    }

    @Override
    public void toggle() {
        mIsFromClicked = true;
        setChecked(!mChecked);
    }

    @Override
    public void onClick(View v) {
        Utils.toLog("click performed");
        toggle();
    }
}

更好的方法应该在答案中发布，谢谢大家。

setChecked（false）因某种原因被调用

1 个答案: