android - RecyclerView android中的内存泄漏

Question

我在片段中有一个 RecyclerView。我确定内存泄漏来自 RecyclerView，因为当我添加 RecyclerView 时，会出现内存泄漏。

这是我的 RecyclerView 适配器：

public class TabsAdapter extends RecyclerView.Adapter<TabsAdapter.SetViewHolder> {

private Context context;
private List<TabsModel> items = Collections.emptyList();
private TabsDatabaseHelper databaseHelper;
private Dialog dialog;

public TabsAdapter(Context context, List<TabsModel> items, Dialog dialog) {
    databaseHelper = new TabsDatabaseHelper(context);
    this.context = context;
    this.items = items;
    this.dialog = dialog;
}

@NonNull
@Override
public TabsAdapter.SetViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.item_tabs, parent, false);
    return new SetViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull TabsAdapter.SetViewHolder holder, final int position) {
    //I clean here codes, By removing the code here, Memory Leak again occur
}

@Override
public int getItemCount() {
    return items == null ? 0 : items.size();
}

static class SetViewHolder extends RecyclerView.ViewHolder {

    private ImageView ivShot, ivRemove;
    private TextView tvTitle, tvUrl;
    private ConstraintLayout constraintLayout;

    private SetViewHolder(@NonNull View itemView) {
        super(itemView);
        ivShot = itemView.findViewById(R.id.iv_item_tabs);
        ivRemove = itemView.findViewById(R.id.iv_clear_item_tabs);
        tvTitle = itemView.findViewById(R.id.tv_title_item_tabs);
        tvUrl = itemView.findViewById(R.id.tv_url_item_tabs);
        constraintLayout = itemView.findViewById(R.id.const_item_tabs);
    }
}
}

在片段中：

    tabsModelArrayList.clear();
    tabsModelArrayList = tabsDatabaseHelper.getData();
    tabsAdapter = new TabsAdapter(context, tabsModelArrayList, getDialog());
    recyClerView.setHasFixedSize(true);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(context);
    recyClerView.setLayoutManager(linearLayoutManager);
    recyClerView.setAdapter(tabsAdapter);

所以内存泄漏是：

我尝试在适配器中设置空视图：

@Override
public void onViewDetachedFromWindow(@NonNull SetViewHolder holder) {
    super.onViewDetachedFromWindow(holder);
    holder.constraintLayout = null;
    holder.ivRemove = null;
    holder.ivShot = null;
    holder.tvTitle = null;
    holder.tvUrl = null;
}

或者在 inDesroy Fragment 中，我设置：

recyClerView.setAdapter(null);

但我仍然有这个错误。你能帮助我吗？

- - - - - 编辑

我从适配器中删除了 Context 和 DatabaseHelper：

public class TabsAdapter extends RecyclerView.Adapter<TabsAdapter.SetViewHolder> {

private List<TabsModel> items = Collections.emptyList();
private Dialog dialog;

public TabsAdapter(List<TabsModel> items, Dialog dialog) {
    this.items = items;
    this.dialog = dialog;
}

@NonNull
@Override
public TabsAdapter.SetViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.item_tabs, parent, false);
    return new SetViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull TabsAdapter.SetViewHolder holder, final int position) {
    //I clean here codes, By removing the code here, Memory Leak again occur
}

@Override
public int getItemCount() {
    return items == null ? 0 : items.size();
}

static class SetViewHolder extends RecyclerView.ViewHolder {

    private ImageView ivShot, ivRemove;
    private TextView tvTitle, tvUrl;
    private ConstraintLayout constraintLayout;

    private SetViewHolder(@NonNull View itemView) {
        super(itemView);
        ivShot = itemView.findViewById(R.id.iv_item_tabs);
        ivRemove = itemView.findViewById(R.id.iv_clear_item_tabs);
        tvTitle = itemView.findViewById(R.id.tv_title_item_tabs);
        tvUrl = itemView.findViewById(R.id.tv_url_item_tabs);
        constraintLayout = itemView.findViewById(R.id.const_item_tabs);
    }
}

@Override
public void onViewDetachedFromWindow(@NonNull SetViewHolder holder) {
    super.onViewDetachedFromWindow(holder);
    holder.constraintLayout = null;
    holder.ivRemove = null;
    holder.ivShot = null;
    holder.tvTitle = null;
    holder.tvUrl = null;
}
}

但不能修复内存泄漏。

Answer 1

我可以建议你两件事。首先，您不能在您的 recyclerView 适配器构造函数中发送上下文。在您的代码中，您在 OnCreateView 中将其用作 parent.getContext 。在构造函数中发送上下文会导致内存泄漏。其次，我认为您不应该在构造函数中初始化 DatabaseHelper。您可以在创建适配器实例之前执行此操作。从数据库中获取列表并在构造函数中发送列表而不是 DatabaseHelper。