我有一个带文本和复选框的多选回收站视图。我希望如果用户选择一些复选框，然后点击＆＃34; DONE＆＃34;按钮，即使用户导航到另一个活动，这些复选框仍应保持检查状态。因此，当用户返回到recyclerview活动页面时，仍会检查复选框。
//Model
public class FilterModel {
public static final int TYPE_A = 0;
public static final int TYPE_B = 1;
private String mName;
private int mType;
private boolean box;
private String mainId, subId;
public FilterModel(String mName, int mType, boolean box, String mainId) {
this.mName = mName;
this.mType = mType;
this.box = box;
this.mainId = mainId;
}
public String getmName() {
return mName;
}
public void setmName(String mName) {
this.mName = mName;
}
public int getmType() {
return mType;
}
public void setmType(int mType) {
this.mType = mType;
}
public boolean isBox() {
return box;
}
public void setBox(boolean box) {
this.box = box;
}
public String getMainId() {
return mainId;
}
public void setMainId(String mainId) {
this.mainId = mainId;
}
public String getSubId() {
return subId;
}
public void setSubId(String subId) {
this.subId = subId;
}
}//Adapter
public class FilterAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private List<FilterModel> mList;
public FilterAdapter(List<FilterModel> list) {
this.mList = list;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
switch (viewType) {
case FilterModel.TYPE_A:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_one, parent, false);
return new CatViewHolder(view);
case FilterModel.TYPE_B:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_two, parent, false);
return new SubViewHolder(view);
}
return null;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
final FilterModel object = mList.get(position);
if (object != null) {
switch (object.getmType()) {
case FilterModel.TYPE_A:
((CatViewHolder) holder).mTitle.setText(object.getmName());
((CatViewHolder) holder).mCheck.setChecked(object.isBox());
((CatViewHolder) holder).mCheck.setTag(mList.get(position));
((CatViewHolder) holder).mCheck.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
CheckBox cb = (CheckBox) view;
FilterModel model = (FilterModel) cb.getTag();
model.setBox(cb.isChecked());
object.setBox(cb.isChecked());
}
});
break;
case FilterModel.TYPE_B:
((SubViewHolder) holder).mTitle.setText(object.getmName());
((SubViewHolder) holder).mCheck.setChecked(object.isBox());
((SubViewHolder) holder).mCheck.setTag(mList.get(position));
((SubViewHolder) holder).mCheck.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
CheckBox cb = (CheckBox) view;
FilterModel model = (FilterModel) cb.getTag();
model.setBox(cb.isChecked());
object.setBox(cb.isChecked());
}
});
break;
}
}
}
@Override
public int getItemCount() {
if (mList == null)
return 0;
return mList.size();
}
@Override
public int getItemViewType(int position) {
if (mList != null) {
FilterModel object = mList.get(position);
if (object != null) {
return object.getmType();
}
}
return 0;
}
public static class CatViewHolder extends RecyclerView.ViewHolder {
private TextView mTitle;
private CheckBox mCheck;
public CatViewHolder(View itemView) {
super(itemView);
mTitle = (TextView) itemView.findViewById(R.id.tv_one);
mCheck = (CheckBox) itemView.findViewById(R.id.check1);
}
}
public static class SubViewHolder extends RecyclerView.ViewHolder {
private TextView mTitle;
private CheckBox mCheck;
public SubViewHolder(View itemView) {
super(itemView);
mTitle = (TextView) itemView.findViewById(R.id.tv_two);
mCheck = (CheckBox) itemView.findViewById(R.id.check2);
}
}
public List<FilterModel> getList() {
return mList;
}
}//Activity
public class FilterActivity extends AppCompatActivity{
List<FilterModel> list = new ArrayList<>();
FilterAdapter adapter;
RecyclerView mRecyclerView;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_filter);
fetchDetails();
adapter = new FilterAdapter(list);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(FilterActivity.this, OrientationHelper.VERTICAL, false);
mRecyclerView = (RecyclerView) findViewById(R.id.multipleRowRecyclerView);
mRecyclerView.setLayoutManager(linearLayoutManager);
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mRecyclerView.setAdapter(adapter);
}
private void fetchDetails() {
if(list!=null )list.clear();
StringRequest stringRequest = new StringRequest(Request.Method.POST, URLUtils.URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jObj = new JSONObject(response);
if (jObj.getString("Ack").equals("1")) {
JSONArray jsonArray = jObj.getJSONArray("parentcategory");
for(int i=0; i<jsonArray.length(); i++){
JSONObject obj = jsonArray.getJSONObject(i);
String maincategory = obj.getString("name");
String mainId = obj.getString("id");
list.add(new FilterModel(maincategory, FilterModel.TYPE_A, false, mainId));
JSONArray newArray = new JSONArray(jsonArray.getJSONObject(i).getString("subcategory"));
for(int j=0; j<newArray.length(); j++){
String subcategory = newArray.getJSONObject(j).getString("name");
String subId = newArray.getJSONObject(j).getString("id");
list.add(new FilterModel(subcategory, FilterModel.TYPE_B, false, subId));
}
}
adapter.notifyDataSetChanged();
} else{
Toast.makeText(FilterActivity.this, "No Categories available", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(), "VolleyError" + error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("auth", "MY_KEY");
params.put("action", "categorypostedproduct");
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
requestQueue.add(stringRequest);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_done:
String data = "";
List<FilterModel> stList = ((FilterAdapter) adapter).getList();
for (int i = 0; i < stList.size(); i++) {
FilterModel model = stList.get(i);
if (model.isBox() == true) {
data = data + "\n" + model.getmName().toString();
}
}
Toast.makeText(FilterActivity.this, "Selected Stuff: \n" + data, Toast.LENGTH_LONG).show();
// HERE I WANT TO SAVE THE STTATE FOR ALL CHECKBOXS
break;
case android.R.id.home:
onBackPressed();
break;
default:
break;
}
return true;
}
}