[英]Getting values from RecyclerView EditText?
我對recyclerView感到震驚,
這里的名稱和平衡字段來自兩個不同的數組。 我需要的是,這里每行都有一個EditText字段。 我需要訪問每一行上的每個EditText。 並從中獲取值..總計顯示在Total textView上。 可能嗎? 我嘗試了很多。 我沒理解。
我在這附上我的課程。
主要活動
public class GroupCollectionFragment extends Fragment {
String[] nameArray = {"Akhil","Mohan","Anoop","Syam","Athul","Anish","Anand","Prasad","Mani","Oommen"
,"Akhil","Mohan","Anoop","Syam","Athul","Anish","Anand","Prasad","Mani","Oommen"
,"Akhil","Mohan","Anoop","Syam","Athul","Anish","Anand","Prasad","Mani","Oommen"};
String[] balanceArray={"2354","6578","2345","34654","2542","2354","6578","2345","34654","2542"
,"2354","6578","2345","34654","2542","2354","6578","2345","34654","2542"
,"2354","6578","2345","34654","2542","2354","6578","2345","34654","2542"};
RecyclerView mRecyclerView;
RecyclerView.Adapter mAdapter;
LinearLayoutManager mLayoutManager;
List<DataHolder> holderList=new ArrayList<DataHolder>();
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootview=inflater.inflate(R.layout.group_collection_layout,container,false);
mRecyclerView = (RecyclerView) rootview.findViewById(R.id.my_recycler_view);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getContext());
mRecyclerView.setLayoutManager(mLayoutManager);
setItems();
mAdapter = new Adapter(holderList);
mRecyclerView.setAdapter(mAdapter);
return rootview;
}
private void setItems() {
for(int i=0;i<nameArray.length;i++){
DataHolder item=new DataHolder();
item.setDname(nameArray[i]);
item.setDbalance(balanceArray[i]);
holderList.add(item);
}
}
}
DataHolder
public class DataHolder {
String dname,dbalance;
public DataHolder(){
}
public String getDname(){
return dname;
}
public void setDname(String name){
this.dname=name;
}
public String getDbalance(){
return dbalance;
}
public void setDbalance(String balance){
this.dbalance=balance;
}
}
適配器
public class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
private List<DataHolder> mDataSet;
public static class ViewHolder extends RecyclerView.ViewHolder{
private TextView anameTxtView,abalanceTxtView;
private EditText adepositEditText;
public ViewHolder(View v){
super(v);
anameTxtView=(TextView)v.findViewById(R.id.nameTextView);
abalanceTxtView=(TextView)v.findViewById(R.id.balanceTextView);
adepositEditText=(EditText)v.findViewById(R.id.depositEditText);
}
}
public Adapter(List<DataHolder> myData){
mDataSet=myData;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v=LayoutInflater.from(parent.getContext()).inflate(R.layout.row_main,parent,false);
ViewHolder vh=new ViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.anameTxtView.setText(mDataSet.get(position).getDname());
holder.abalanceTxtView.setText(mDataSet.get(position).getDbalance());
}
@Override
public int getItemCount() {
return mDataSet.size();
}
@Override
public int getItemViewType(int position) {
return position;
}
}
我認為你正在尋找一個回調,這意味着每當一個EditTexts上的數字發生變化時,你也希望總數發生變化。 所以首先你需要添加一個界面,
OnEditTextChanged接口
public interface OnEditTextChanged {
void onTextChanged(int position, String charSeq);
}
然后你需要在適配器的構造函數中包含它。
在Adapter.java中
private List<DataHolder> mDataSet;
private OnEditTextChanged onEditTextChanged;
public Adapter(List<DataHolder> myData, OnEditTextChanged onEditTextChanged) {
mDataSet = myData;
this.onEditTextChanged = onEditTextChanged;
}
在適配器的onBindViewHolder中,您需要設置一個用於文本更改的偵聽器,並使用onEditTextChanged對象告訴該片段。
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
holder.anameTxtView.setText(mDataSet.get(position).getDname());
holder.abalanceTxtView.setText(mDataSet.get(position).getDbalance());
holder.adepositEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
onEditTextChanged.onTextChanged(position, charSequence.toString());
}
@Override
public void afterTextChanged(Editable editable) {}
});
}
將此數組添加到GroupCollectionFragment中,以便可以將值保存在片段中,並在需要時使用它們。
Integer[] enteredNumber = new Integer[1000];
在GroupCollectionFragment中更改構造函數調用
mAdapter = new Adapter(holderList, new OnEditTextChanged() {
@Override
public void onTextChanged(int position, String charSeq) {
enteredNumber[position] = Integer.valueOf(charSeq);
updateTotalValue();
}
});
private void updateTotalValue() {
int sum = 0;
for (int i = 0; i < 1000; i++) {
sum += enteredNumber[i];
}
totalValue.setText(String.valueOf(sum));
}
如果你想要整個文件,請告訴我。 我寫了它並構建了apk,它工作得很好。
您可以通過鍵盤操作獲得價值。 你只需要設置
編輯文本中的android:imeOptions="actionDone"
。 然后只使用下面的代碼
adepositEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_DONE) {
// Do whatever you want here
return true;
}
return false;
});
在EditText
上使用TextChangedListener
並將輸入保存在新的HashMap
並使用key作為行的order / unique鍵的id。
adeposit.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {}
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
public void onTextChanged(CharSequence s, int start,
int before, int count) {
// Save value her in HashMap
}
});
最后從HashMap
獲取值。
我修改了@MeHdi的答案。 @MeHdi的答案幾乎沒有錯,這將成為一個大問題。當在recyclerview中向上/向下滾動時,項目位置會發生變化,其值將變為空或變空。 另外,我在recyclelerview的一行中有一些editText。 感謝@ MeHdi的想法。 屏幕如下圖所示
OnEditTextChanged
public interface OnEditTextChanged {
// here component_id is editTextId (findView by Id)
void onTextChanged(int component_id, int position, String charSeq);
}
在全局適配器類中聲明如下
private Context context;
private List<DataModel> dailyLiqdateList;
private OnEditTextChanged onEditTextChanged;
適配器類
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyHolder> {
private Context context;
private List<DataModel> dataList;
private OnEditTextChanged onEditTextChanged;
public MyAdapter(Context mContext, List<DataModel> dataList, OnEditTextChanged onEditTextChanged) {
this.context = mContext;
this.dataList = dataList;
this.onEditTextChanged = onEditTextChanged;
}
@NonNull
@Override
public MyHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View myHolder = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list,parent,false);
return new MyHolder(myHolder);
}
@Override
public int getItemCount() {
return dataList.size();
}
// This is important method due to which even if you scroll list, editText values will not get changed/empty. This method will maintain its position in recyclerview
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public void onBindViewHolder(MyHolder holder, int position) {
holder.bind(dataList.get(position), position);
holder.firstEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
onEditTextChanged.onTextChanged(R.id.item_firstEditText,position, holder.firstEditText.getText().toString());
}
});
holder.secondEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
onEditTextChanged.onTextChanged(R.id.item_secondEditText, position, holder.secondEditText.getText().toString());
}
});
}
public class MyHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView headerName;
EditText firstEditText, secondEditText;
MyHolder(View itemView) {
super(itemView);
headerName = itemView.findViewById(R.id.headerNameTv);
firstEditText = itemView.findViewById(R.id.item_firstEditText);
secondEditText = itemView.findViewById(R.id.item_secondEditText);;
}
public void bind(final DataModel dto, int position) {
if (dto != null) {
headerName.setText(dto.getName());
}
}
}
}
您的Activity類,其中包含recyclerview
// declare these values globally
Integer[] firstValues, secondValues;
// Declare textviews for calculating and setting total values
private TextView firstTotalTv, secondTotalTv;
// Initialize editText values array list, same as dataList size.
firstValues= new Integer[dataList.size()];
secondValues= new Integer[dataList.size()];
// setting adapter on recyclerview, write this in onCreate()
myAdapter = new MyAdapter(thisActivity, dataList, new OnEditTextChanged() {
@Override
public void onTextChanged(int component_id, int position, String charSeq) {
if (component_id == R.id.item_firstEditText) {
if (Utils.isValidStr(charSeq)) {
firstValues[position] = Integer.valueOf(charSeq);
} else {
firstValues[position] = null;
}
updateTotalValue1(firstValues, firstTotalTv);
}
if (component_id == R.id.item_secondEditText) {
if (Utils.isValidStr(charSeq)) {
secondValues[position] = Integer.valueOf(charSeq);
} else {
secondValues[position] = null;
}
updateTotalValue1(secondValues, secondTotalTv);
}
}
});
recyclerView.setAdapter(myAdapter);
// Update Method, write outside of onCreate()
private void updateTotalValue1(Integer[] editTextList, TextView totalTextView) {
int pSum = 0, c1Sum = 0;
for (int i = 0; i < editTextList.length; i++) {
if (editTextList[i] != null)
pSum += editTextList[i];
else if (i == 0 && editTextList[i] == null)
pSum = 0;
}
if (pSum > 0)
totalTextView.setText(String.valueOf(pSum));
else
totalTextView.setText("");
}
更好的性能方法
private List<Integer> getQuantityList() {
List<Integer> quantities = new ArrayList<>();
for (int i = 0; i < cartItems_rv.getChildCount(); i++) {
quantities.add(Integer.valueOf(((EditText)Objects.requireNonNull(
Objects.requireNonNull(cartItems_rv.getLayoutManager()).findViewByPosition(i))
.findViewById(R.id.quantity_et)).getText().toString()));
}
return quantities;
}
感謝Goku的回答 ,隨意為您自己的應用程序塑造方法。
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