AndroidRecycleView高度自适应

RecyclerView recyclerView = findViewById(R.id.recyclerView);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);

RecyclerView recyclerView = findViewById(R.id.recyclerView);
GridLayoutManager layoutManager = new GridLayoutManager(this, spanCount); // spanCount为每行（或列）的子项数量
recyclerView.setLayoutManager(layoutManager);

RecyclerView recyclerView = findViewById(R.id.recyclerView);
MyAdapter adapter = new MyAdapter(data); // 自定义Adapter
recyclerView.setAdapter(adapter);

int totalHeight = 0;
for (int i = 0; i < adapter.getItemCount(); i++) {
    View itemView = adapter.getViewByPosition(i, recyclerView);
    itemView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
    totalHeight += itemView.getMeasuredHeight();
}
ViewGroup.LayoutParams layoutParams = recyclerView.getLayoutParams();
layoutParams.height = totalHeight;
recyclerView.setLayoutParams(layoutParams);