我不確定我的主題是否提出了正確的問題，但情況就是這樣。我正在開發一個在單獨的類中執行多個計算的應用程序。計算正確完成，我可以看到它們在 logcat 中?，F在我想在 recyclerview 中顯示它們，為此我試圖在執行 recyclerview 之前將它們添加到數組列表中。我的數組列表正在獲取標題中顯示的值，而它沒有顯示在我的回收站視圖中。這是我的代碼，但根據我查找的研究，我看不出我做錯了什么。數組列表代碼：public class PlanetData {private String planetRA;private PlanetData(String planetRA){    this.planetRA = planetRA;}public String getPlanetRA(){    return planetRA;}public void setPlanetRA (String planetRA){    this.planetRA = planetRA;}public static void main(String [] args){        List<PlanetData> planetvalues = new ArrayList<>();        planetvalues.add(new PlanetData("12"));        planetvalues.add(new PlanetData(Double.toString(Mercury.getMercuryRA())));        planetvalues.add(new PlanetData(Double.toString(Venus.getVenusRA())));        planetvalues.add(new PlanetData(Double.toString(Moon.getMoonRA())));        planetvalues.add(new PlanetData (Double.toString(Mars.getMarsRA())));        planetvalues.add(new PlanetData(Double.toString(Jupiter.getJupiterRA())));        planetvalues.add(new PlanetData(Double.toString(Saturn.getSaturnRA())));        planetvalues.add(new PlanetData(Double.toString(Uranus.getUranusRA())));        planetvalues.add(new PlanetData(Double.toString(Neptune.getNeptuneRA())));        planetvalues.add(new PlanetData(Double.toString(Pluto.getPlutoRA())));            System.out.println("This is the arraylist" + planetvalues);}        }RecyclerView 適配器      public class PlanetRecyclerViewAdapter extends RecyclerView.Adapter<PlanetRecyclerViewAdapter.ViewHolder> {    List<PlanetData> mPlanetDataList;    Context mContext;    public static class ViewHolder extends RecyclerView.ViewHolder{        public TextView currentRA;        public ViewHolder(View itemView) {            super(itemView);            currentRA = (TextView) itemView.findViewById(R.id.planet_location);        }    }