Question

我正在编写一些适用于Android的应用程序，如果在构建该项目的过程中，我出现错误：E / RecyclerView：未连接适配器；跳过布局。应用程序可以运行，但是当我要启动此特定片段（映射片段）时，它会崩溃或再次进入主活动。但是，问题仅在于Android 9.0 Pie，而Android 8.0 Oreo则没有问题

我尝试了很多事情，但找不到根本原因，因为在要启动的片段上没有RecyclerView，因此我猜它不需要适配器。

我要开始的片段：

公共类MapsActivity扩展FragmentActivity实现OnMapReadyCallback {

私有GoogleMap mMap；

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    GPSTracker tracker = new GPSTracker(MapsActivity.this);
    double lat=tracker.getLatitude();
    double lng=tracker.getLongitude();

    // Add a marker for current location and move the camera
    LatLng currentLocation = new LatLng(lat, lng);
    mMap.addMarker(new MarkerOptions().position(currentLocation).title("Current Location Marker"));
    mMap.moveCamera(CameraUpdateFactory.newLatLng(currentLocation));
  }
}

这是我要转到此地图片段的活动：

public class DescriptionActivity extends AppCompatActivity {

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_description);
    Bundle bundle = getIntent().getExtras();
    int id = bundle.getInt("ID");
    String detailedDescription = bundle.getString("TITLE");
    String imageUrl = bundle.getString("IMAGE_URL");
    Button navigate = (Button) findViewById(R.id.navigate);
    TextView idTxt = (TextView) findViewById(R.id.detailsText);
    TextView detailedDescTxt = (TextView) findViewById(R.id.detailedDescription);
    ImageView dishImage = (ImageView) findViewById(R.id.dishImage);
    idTxt.setText("ID " + String.valueOf(id));
    detailedDescTxt.setText(detailedDescription);
    Picasso.get().load(imageUrl).into(dishImage);

    navigate.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(v.getContext(), MapsActivity.class);
            v.getContext().startActivity(intent);
        }
    });
  }
}

主要活动类（带有“设置适配器”和“设置layoutManager”）

公共类MainActivity扩展了AppCompatActivity {

private RecyclerListAdapter adapter;
private RecyclerView recyclerView;
ProgressDialog progressDialog;

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

    progressDialog = new ProgressDialog(MainActivity.this);
    progressDialog.setMessage("Loading....");
    progressDialog.show();

    /*Create handle for the RetrofitInstance interface*/
    GetDataService service = RetrofitClientInstance.getRetrofitInstance().create(GetDataService.class);
    Call<List<RetroList>> call = service.getAllPhotos();
    call.enqueue(new Callback<List<RetroList>>() {
        @Override
        public void onResponse(Call<List<RetroList>> call, Response<List<RetroList>> response) {
            progressDialog.dismiss();
            generateDataList(response.body());
        }

        @Override
        public void onFailure(Call<List<RetroList>> call, Throwable t) {
            progressDialog.dismiss();
            Toast.makeText(MainActivity.this, "Something went wrong...Please try later!", Toast.LENGTH_SHORT).show();
        }
    });
}

/*Method to generate List of data using RecyclerView with custom adapter*/
private void generateDataList(List<RetroList> photoList) {
    recyclerView = findViewById(R.id.customRecyclerView);
    adapter = new RecyclerListAdapter(this, photoList);
    RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(MainActivity.this);
    recyclerView.setLayoutManager(layoutManager);
    recyclerView.setAdapter(adapter);
}

}

此处的崩溃日志：http://pasted.co/65607023

Answer 1

移动此行：

recyclerView = findViewById(R.id.customRecyclerView);

在onCraete()方法内

发生此错误的原因是，当调用generateDataList()时，每次都会定义RecyclerView

E / RecyclerView：未连接适配器；跳过布局-Android 9.0 Pie的问题

1 个答案: