我在这里结束了我的智慧。我一直在研究这个android视图，我想使用一个对话框让用户填写一个表单（本质上）。表单包含两个列表项（我想使用两个微调器显示）。将根据列表1中的所选项目填充第二个列表的内容。 一旦两个Spinners都选择了一个项目，我就会使用Recycler视图来显示要填充的其他字段。这些字段将根据列表2中选择的项目决定。
我目前的困境是我无法通过对话框向我显示第一个项目列表。提示时，对话框和其中的微调器呈现正常。但是旋转器总是空着的。
这是我的代码。我将从spinner.xml布局的标记开始：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
android:textSize="14sp"
android:textColor="@android:color/black"/>
</LinearLayout>
我的自定义对话框的布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/properties_ll"
android:background="@color/translucent_green">
<Spinner
android:layout_width="120dp"
android:layout_height="40dp"
android:clickable="true"
android:id="@+id/material_types_dd"
android:spinnerMode="dropdown"/>
<Spinner
android:layout_width="120dp"
android:layout_height="40dp"
android:clickable="true"
android:id="@+id/materials_dd"
android:spinnerMode="dropdown"/>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/material_detials_rv"/>
</LinearLayout>
自定义对话框类（使用Volley的所有HTTP调用都在运行并经过全面测试，所以我知道问题不存在）：
public class TacDetailsDialogFragment extends DialogFragment {
private static final String TAG = TacDetailsDialogFragment.class.getSimpleName();
@BindView(R.id.properties_ll)
LinearLayout properties;
@BindView(R.id.material_types_dd)
Spinner materialtypesDD;
@BindView(R.id.materials_dd)
Spinner materialsdd;
@BindView(R.id.material_detials_rv)
RecyclerView materialDetailsRecycler;
private List<BaseModel> materials;
private List<BaseModel> materialTypes;
private BaseModel selectedMaterial;
private BaseModel selectedMaterialType;
private List<BaseModel> selectedMaterialFields;
private List<List<BaseModel>> selectedMaterialFieldUnits;
ProgressBarHelper progressBarHelper;
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
builder.setView(inflater.inflate(R.layout.tac_details_dialog, null))
.setPositiveButton(
R.string.ok,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}
)
.setNegativeButton(
"Cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
TacDetailsDialogFragment.this.getDialog().cancel();
}
}
);
View view = inflater.inflate(R.layout.tac_details_dialog, null);
ButterKnife.bind(this, view);
progressBarHelper = new ProgressBarHelper(this.getActivity());
getMaterialTypes();
materialtypesDD.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Log.d(TAG, materialTypes.get(position).toString());
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
// materialsdd.setOnItemSelectedListener(new ClickToSelectEditText.OnItemSelectedListener() {
// @Override
// public void onItemSelectedListener(Object item, int selectedIndex) {
// getMaterialFields();
// }
// });
return builder.create();
}
/* The activity that creates an instance of this dialog must implement
* this interface in order to receive event callbacks. Each method
* passes the dialogfrag in case the host needs to query it */
public interface TacDetailsDialogListener {
public void onDialogPositiveClick(DialogFragment dialog);
}
TacDetailsDialogListener mListener;
@Override
public void onAttach(Context context) {
super.onAttach(context);
try{
mListener = (TacDetailsDialogListener) context;
} catch (ClassCastException e) {
throw new ClassCastException(context.toString() + " must implement TacDetailsDialogListener");
}
}
private void initMaterialTypesDD() {
materialtypesDD.setAdapter(new ArrayAdapter<BaseModel>(getContext(), R.layout.spinner, materialTypes) {
@Override
public View getDropDownView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View view = super.getDropDownView(position, convertView, parent);
// TextView text = (TextView) view.findViewById(R.id.text1);
// text.setVisibility(View.VISIBLE);
// text.setTextColor(Color.BLACK);
return view;
}
});
}
private void initMaterialsDD() {
materialsdd.setAdapter(new ArrayAdapter<>(getContext(), R.layout.support_simple_spinner_dropdown_item, materials));
}
private void initMaterialFields() {
materialDetailsRecycler.setLayoutManager(new LinearLayoutManager(this.getContext(), LinearLayoutManager.VERTICAL, false));
materialDetailsRecycler.setAdapter(new MaterialDetailRecyclerViewAdapter(selectedMaterialFields, selectedMaterialFieldUnits));
}
private void initMaterialTypes(JSONArray data) throws JSONException {
materialTypes = new ArrayList<BaseModel>();
for (int i = 0; i < data.length(); i++) {
materialTypes.add(new BaseModel(data.getJSONObject(i)));
}
}
public void initMaterials(JSONArray data) throws JSONException {
materials = new ArrayList<BaseModel>();
for (int i = 0; i < data.length(); i++) {
materials.add(new BaseModel(data.getJSONObject(i)));
}
}
public void initSelectedMaterialFields(JSONArray data) throws JSONException {
selectedMaterialFields = new ArrayList<BaseModel>();
selectedMaterialFieldUnits = new ArrayList<List<BaseModel>>();
for (int i = 0; i < data.length(); i++) {
JSONObject field = data.getJSONObject(i);
selectedMaterialFields.add(new BaseModel(field));
JSONArray fieldUnits = field.getJSONArray("units");
List<BaseModel> units = new ArrayList<>();
for (int j = 0; j < fieldUnits.length(); j++) {
units.add(new BaseModel(fieldUnits.getJSONObject(j)));
}
selectedMaterialFieldUnits.add(units);
}
}
private void getMaterialTypes() {
VolleySingleton.getInstance(this.getContext()).addToRequestQueue(
new JsonObjectRequest(
Request.Method.GET,
getString(R.string.server_ip) + getString(R.string.materialtypes),
null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
if (response.getInt("code") == 200) {
initMaterialTypes(response.getJSONArray("data"));
initMaterialTypesDD();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
}
)
);
}
private void getMaterials() {
VolleySingleton.getInstance(this.getContext()).addToRequestQueue(
new JsonObjectRequest(
Request.Method.GET,
getActivity().getString(R.string.server_ip) + getActivity().getString(R.string.materials) + selectedMaterialType.getId(),
null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
if (response.getInt("code") == 200) {
JSONArray data = response.getJSONArray("data");
initMaterials(data);
initMaterialsDD();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}
)
);
}
private void getMaterialFields() {
VolleySingleton.getInstance(this.getContext()).addToRequestQueue(
new JsonObjectRequest(
Request.Method.GET,
getString(R.string.server_ip) + getString(R.string.materialfields) + selectedMaterial.getId(),
null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
if (response.getInt("code") == 200) {
initSelectedMaterialFields(response.getJSONArray("data"));
initMaterialFields();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}
)
);
}
}
自定义对象BaseModel：
public class BaseModel implements Listable {
String name;
int id;
int type_id;
public BaseModel() {}
public BaseModel(JSONObject jsonObject) {
try {
this.name = jsonObject.getString("name");
} catch (JSONException e) {
e.printStackTrace();
}
try {
this.id = jsonObject.getInt("id");
} catch (JSONException e) {
e.printStackTrace();
}
try {
this.type_id = jsonObject.getInt("type_id");
} catch (JSONException e) {
e.printStackTrace();
}
}
public BaseModel(String name) {
this.name = name;
}
public BaseModel(String name, int id) {
this.name = name;
this.id = id;
}
public BaseModel(String name, int id, int type_id) {
this.name = name;
this.id = id;
this.type_id = type_id;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getType_id() {
return type_id;
}
public void setType_id(int type_id) {
this.type_id = type_id;
}
public String toString() {
return this.name;
}
@Override
public String getLabel() {
return this.name;
}
@Override
public void setValues(String name, int id) {
this.name = name;
this.id = id;
}
}
这就是我从主要活动中调用对话框的方式：
public void makeTacDetailsAlert() {
dialog = new TacDetailsDialogFragment();
dialog.show(this.getSupportFragmentManager(), "TacDetailsDialogFragment");
}
Idk如果RecyclerView位是相关的，那么不要将它们包括在这个代码混乱的问题中。
对你来说，S / O众神。
答案 0 :(得分：0)
感谢一夜好眠，一些更清晰的头脑思考，以及@Sam的回答（https://stackoverflow.com/a/14676975/3438497）我已经解决了我的问题。
除了确保我将对话框和单个视图绑定到同一个布局实例（而不是不同的实例）之外，我还需要按照此处的建议为BaseModel对象创建自定义SpinnerAdapter：https://stackoverflow.com/a/8116756/3438497
希望这有助于解决此问题的任何其他人。