资源$ NotFoundException试图在Android Studio中设置RecyclerView

Question

我一直试图在过去两天内设置一个RecyclerView,其中大部分似乎按预期工作.但是,每当我尝试运行我的应用程序时,它都会发生致命的异常崩溃:

E/AndroidRuntime:FATAL EXCEPTION:main进程:com.mad.exercise5,PID:16634 android.content.res.Resources $ NotFoundException:android.content.res.Resources.getText中的字符串资源ID#0x1(Resources.java:342 )在android.widget.TextView.setText(TextView.java:4244)的android.support.v7.widget.ResourcesWrapper.getText(ResourcesWrapper.java:52)at (...)

我一直在关注YouTube的幻灯片教程,第1-4部分.在教程的上下文中,RecyclerView正在一个片段中设置,我还没有进入.为了防止错误来自在主活动中创建RecyclerView,我也尝试在StackTips上学习教程.

尽我所能,我已经能够通过注释掉设置布局管理器(mRecyclerView.setLayoutManager(new LinearLayoutManager(this));)的行来停止错误,但错误似乎来自于onBindViewHolder.具体来说,将文本设置为我的ViewHolder TextViews.

谷歌搜索错误,并进行一些研究,我发现很多情况下,其他问题和问题突然出现此错误.但是,问题似乎总是用户正在调用资源,而是直接将其作为id引用.也就是说,他们会使用' String string = R.string.string'代替' String string = getString(R.string.string)'.我已经三次检查我的标准资源实现,并且我相信我没有错过任何东西.至于教程让我相信,我正确地实例化我的TextViews,正确的实现findViewById.主要活动上下文在初始化时传递,因此找到相关的ID应该没有问题.

为什么我在RecyclerView示例活动中收到了Resources $ NotFoundException？两个相关的java类如下:

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private ArrayList<Train> mTrains;
    private TrainAdapter mTrainAdapter;
    private RecyclerView mRecyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Create the Recycler View
        mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        mTrains = FillTrainData();
        mTrainAdapter = new TrainAdapter(this, mTrains);
        mRecyclerView.setAdapter(mTrainAdapter);
    }

    private ArrayList<Train> FillTrainData()
    {
        ArrayList<Train> mTempTrainData = new ArrayList<>();
        String[] mPlatform = new String[]{"platA", "platB", "platC", "platD"};
        String[] mStatus = new String[]{"arrive", "notarrive"};
        String[] mDestination = new String[]{"destA", "destB", "destC", "destD"};
        String[] mDestinationTime = new String[]{"destA", "destB", "destC", "destD"};
        int[] mArrivalTime = new int[]{1,2,3,4};

        for(int i = 0; i < 4; i ++)
        {
            Train mTrain = new Train(mPlatform[i], mArrivalTime[i], mStatus[i%2],
                    mDestination[i], mDestinationTime[i]);
            mTempTrainData.add(mTrain);
        }

        return mTempTrainData;
    }
}

TranAdapter.java

public class TrainAdapter extends RecyclerView.Adapter<TrainAdapter.CustomViewHolder> {

    private Context mContext;
    private ArrayList<Train> mTrains;

    public TrainAdapter(Context context, ArrayList<Train> trains) {
        mContext = context;
        mTrains = trains;
    }

    @Override
    public CustomViewHolder onCreateViewHolder(ViewGroup parent, int index) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.train_item, null);
        CustomViewHolder viewHolder = new CustomViewHolder(view);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(CustomViewHolder viewHolder, int position) {
        Train currentTrain = mTrains.get(position);

        viewHolder.platformText.setText(currentTrain.GetPlatform());
        viewHolder.arrivalTimeText.setText(currentTrain.GetArrivalTime());
        viewHolder.statusText.setText(currentTrain.GetStatus());
        viewHolder.destinationText.setText(currentTrain.GetDestination());
        viewHolder.destinationTimeText.setText(currentTrain.GetDestinationTime());
    }

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

    class CustomViewHolder extends RecyclerView.ViewHolder {
        TextView platformText;
        TextView arrivalTimeText;
        TextView statusText;
        TextView destinationText;
        TextView destinationTimeText;

        public CustomViewHolder(View itemView) {
            super(itemView);

            platformText = 
                    (TextView)itemView.findViewById(R.id.train_item_platform_text);
            arrivalTimeText = 
                    (TextView)itemView.findViewById(R.id.train_item_arrival_time_text);
            statusText = 
                    (TextView)itemView.findViewById(R.id.train_item_status_text);
            destinationText = 
                    (TextView)itemView.findViewById(R.id.train_item_destination_text);
            destinationTimeText =
                    (TextView)itemView.findViewById(R.id.train_item_destination_time_text);
        }
    }
}

Answer 1

首先阅读TextView的文档.

你的到达时间是int和TextView有两种类型的setText方法,第一种是TextView.setText(String text);第二种TextView.setText(int resource);

当你写的时候你viewHolder.arrivalTimeText.setText(currentTrain.GetArrivalTime());会调用第二种方法.在这种情况下,你有四个值1,2,3,4

意味着就像viewHolder.arrivalTimeText.setText(1);此时R.java可能没有价值"1"的资源; 这就是你得到的原因android.content.res.Resources$NotFoundException: String resource ID #0x1

换viewHolder.arrivalTimeText.setText(currentTrain.GetArrivalTime());行

viewHolder.arrivalTimeText.setText(String.valueOf(currentTrain.GetArrivalTime()));