Question

我想将数据从RecyclerView发送到Activity，但是从RecyclerView的Arraylist中获取的 Image Data 没有发送到Activity。

我成功地编译了代码，但是每当我打开应用程序并在Recycleriew中选择1个项目时，该应用程序都会被强制关闭。

我希望图像和描述数据显示在“活动”中，但始终会强制关闭该应用程序。

片段类：

public class ShipFragment extends Fragment {

    private View v;
    private RecyclerView recyclerShip;
    private ArrayList<Warship> shipList = new ArrayList<>();

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        v = inflater.inflate(R.layout.ship_fragment, container,false);

        recyclerShip = (RecyclerView) v.findViewById(R.id.Recycler_id);
        shipList.addAll(ShipDataRecycler.getShipList());
        recyclerShip.setHasFixedSize(true);
        showRecyclerShipList();

        return v;
    }

    private void showRecyclerShipList() {
        RecyclerAdapter recyclerAdapter;
        recyclerAdapter = new RecyclerAdapter(shipList);
        recyclerShip.setLayoutManager(new LinearLayoutManager(getActivity()));
        recyclerShip.setAdapter(recyclerAdapter);

        recyclerAdapter.setOnItemClickCallback(new RecyclerAdapter.OnItemClickCallback() {
            @Override
            public void onItemClick(Warship zListShip) {
                showSelectedShip(zListShip);
            }
        });
    }
    private void showSelectedShip(Warship ship){
        Intent swap = new Intent(getActivity(), Detail_item.class);
        swap.putExtra(Detail_item.image,ship.getImges());
        swap.putExtra(Detail_item.title, ship.getzTitle());
        swap.putExtra(Detail_item.description, ship.getzDescription());
        startActivity(swap);
    }
}

活动分类：

public class Detail_item extends AppCompatActivity {

    private ImageView imgDetail;
    private TextView titleDetail, descDetail;
    private ArrayList<Warship> listWarship;
    public static final String title = "Nama";
    public static final String description = "deskripsi";
    public static final String image = "foto";

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

        imgDetail = findViewById(R.id.profil_img_id);
        titleDetail = findViewById(R.id.titleShip_id);
        descDetail = findViewById(R.id.desc_id);

        String imageShip = getIntent().getStringExtra(image);
        String titleShip = getIntent().getStringExtra(title);
        String descShip = getIntent().getStringExtra(description);

        titleDetail.setText(titleShip);
        imgDetail.setImageResource(Integer.parseInt(imageShip));
        descDetail.setText(descShip);
    }
}

崩溃日志：

java.lang.RuntimeException：无法启动活动 ComponentInfo {com.kimino.azurlaneshipreview / com.kimino.azurlaneshipreview.Detail_item}： java.lang.NumberFormatException：空在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2706）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2767）在android.app.ActivityThread.-wrap12（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1514）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:163）在android.app.ActivityThread.main（ActivityThread.java:6205）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:904）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:794）引起原因：java.lang.NumberFormatException：null 在java.lang.Integer.parseInt（Integer.java:483）在java.lang.Integer.parseInt（Integer.java:556）在com.kimino.azurlaneshipreview.Detail_item.onCreate（Detail_item.java:38）在android.app.Activity.performCreate（Activity.java:6864）在> android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1119）>在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2659）

Answer 1

由于

导致出现错误

String imageShip = getIntent().getStringExtra(image);

返回一个空值。运行Integer.parseInt(imageShip)时，您会得到NullFormatException。

您应该确保要分配

public static final String image = "foto";

作为分配附加值时的键

//make sure that Detail_item.image == "foto" or that when you get the 
//extra, you are using the same key.
swap.putExtra(Detail_item.image,ship.getImges());

当前该请求返回null。

新活动如何从回收者视图获取数据图像

1 个答案: