如何在編輯單個框時防止EditText列表編輯多個框？

Question

我想用EditText控件實現一個listView。問題是當我編輯其中一個字段時，其他一些字段也在視圖中被修改。然而，我的Java對象反映了變化，我只作（而不是那個被置其他EditTexts）

我的Android活動

public class LoanRepaymentActivity extends ListActivity implements View.OnClickListener { 

private Location lastKnownLocation; 
private ArrayList<CurrentRepaymentInstallment> loansForRepayment; 
@Override 
public void onCreate(Bundle savedInstanceState){ 
    lastKnownLocation = Utility.getLastKnownLocation(this); 
    super.onCreate(savedInstanceState); 

    Intent intent = getIntent(); 

    RepaymentInfo repaymentInfo = (RepaymentInfo)intent.getSerializableExtra(Constants.CURRENT_REPAYMENT_INSTALLMENT); 
    loansForRepayment = repaymentInfo.getLoansForRepayment(); 
    boolean repaymentsNotPresent = loansForRepayment == null || loansForRepayment.isEmpty(); 
    if(repaymentsNotPresent){ 
     Dialog dialog = Utility.getDialogWithText(LoanRepaymentActivity.this, getText(R.string.noLoansForRepayment).toString()); 
     Utility.getDialogButton(dialog, LoanRepaymentActivity.this, PartnerGroupListActivity.class, intent.getStringExtra(Constants.ACECSS_TOKEN_PARAM)); 
     dialog.show(); 
    } 

    ArrayAdapter<CurrentRepaymentInstallment> adapter = new LoanRepaymentListAdapter(this, loansForRepayment); 

    View footer = getLayoutInflater().inflate(R.layout.loan_disbursement_footer, null); 
    getListView().addFooterView(footer); 

    setListAdapter(adapter); 
/*  if(!repaymentsNotPresent) { 
     TextView textView = (TextView)findViewById(R.id.screenTitle); 
     String currentInstallmentLabel = getText(R.string.currentInstallmentLabel).toString() + repaymentInfo.getCurrentGroupInstallment(); 
     textView.setText(currentInstallmentLabel); 
    }*/ 

    Button button = (Button)findViewById(R.id.disburse); 
    button.setOnClickListener(this); 
} 

我的XML佈局

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:orientation="vertical" 
> 

<TextView android:id="@+id/screenTitle" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" > 
</TextView> 

<ListView 
    android:id="@android:id/list" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_above="@+layout/loan_disbursement_footer" 
    /> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:orientation="vertical" > 
<TextView 
    android:id="@+id/borrowerName" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@+id/label" 
    android:textSize="14sp" 
    > 
</TextView> 

<TextView 
    android:id="@+id/loanAmount" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@+id/label" 
    android:textSize="14sp" 
    > 
</TextView> 

<TextView 
    android:id="@+id/installmentNumber" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@+id/label" 
    android:textSize="12sp" 
    > 
</TextView> 

<TextView 
    android:id="@+id/estimatedTotal" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@+id/label" 
    android:textSize="12sp" 
    > 
</TextView> 

</LinearLayout> 
<EditText 
    android:id="@+id/repaymentAmount" 
    android:layout_width="100sp" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:inputType="numberDecimal" 
    android:textSize="12sp" 
    > 
</EditText> 
</RelativeLayout> 

自定義數組適配器用於設置ListView

public class LoanRepaymentListAdapter extends ArrayAdapter<CurrentRepaymentInstallment> { 

private final List<CurrentRepaymentInstallment> loansForRepayment; 
private final Activity context; 

public LoanRepaymentListAdapter(Activity context, List<CurrentRepaymentInstallment> loansForRepayment) { 
    super(context, R.layout.loan_repayments, loansForRepayment); 
    this.context = context; 
    this.loansForRepayment = loansForRepayment; 
} 

static class ViewHolder { 
    protected TextView borrowerName; 
    protected TextView loanAmount; 
    protected TextView installmentNumber; 
    protected TextView estimatedTotal; 
    protected EditText repaymentAmount; 
} 

@Override 
public View getView(final int position, View convertView, ViewGroup parent) { 
    View view = null; 
    if (convertView == null) { 
     LayoutInflater inflator = context.getLayoutInflater(); 
     view = inflator.inflate(R.layout.loan_repayments, null); 
     final ViewHolder viewHolder = new ViewHolder(); 
     viewHolder.borrowerName = (TextView) view.findViewById(R.id.borrowerName); 
     viewHolder.loanAmount = (TextView) view.findViewById(R.id.loanAmount); 
     viewHolder.installmentNumber = (TextView) view.findViewById(R.id.installmentNumber); 
     viewHolder.estimatedTotal = (TextView) view.findViewById(R.id.estimatedTotal); 
     viewHolder.repaymentAmount = (EditText) view.findViewById(R.id.repaymentAmount); 
//   viewHolder.repaymentAmount.setEditableFactory(Editable.Factory.getInstance()); 
     viewHolder.repaymentAmount.addTextChangedListener(new TextWatcher() { 
      @Override 
      public void afterTextChanged(Editable arg0) { 

      } 
      @Override 
      public void beforeTextChanged(CharSequence s, int start, 
        int count, int after) { 
       // TODO Auto-generated method stub 

      } 
      @Override 
      public void onTextChanged(CharSequence s, int start, int before, int count) { 
       CurrentRepaymentInstallment loanRepayment = (CurrentRepaymentInstallment) viewHolder.repaymentAmount.getTag(); 
       String repaymentAmount = s.toString(); 
       loanRepayment.setRepaymentAmount(repaymentAmount); 
      } 
     }); 
     view.setTag(viewHolder); 
     viewHolder.repaymentAmount.setTag(loansForRepayment.get(position)); 
    } else { 
     view = convertView; 
     ((ViewHolder) view.getTag()).repaymentAmount.setTag(loansForRepayment.get(position)); 
    } 
    ViewHolder holder = (ViewHolder) view.getTag(); 
    holder.borrowerName.setText(loansForRepayment.get(position).getLoanProfileBasicInfo().getBorrowerBasicInfo().getFirstName()); 
    holder.loanAmount.setText("Rs. " + Float.toString(loansForRepayment.get(position).getLoanProfileBasicInfo().getLoanAmountInPaisa()/100)); 
    holder.estimatedTotal.setText("Rs. " + Float.toString(loansForRepayment.get(position).getEstimatedTotalAmount()/100)); 
    holder.installmentNumber.setText("Inst no : " + Integer.toString(loansForRepayment.get(position).getInstallmentNumber())); 
    float repaymentAmt = loansForRepayment.get(position).getRepaymentAmount(); 
    if(repaymentAmt != 0.0) holder.repaymentAmount.setText(Float.toString(repaymentAmt)); 
    return view; 
    } 
} 

Answer 1

Android ListView回收的原因.. 請看看接受的答案在下面的鏈接 EditText in ListView without it recycling input

希望這會有所幫助。

Answer 2

解決方法是在設置文本之前刪除添加的textwatcher。否則，該視圖上的以前的textwatcher將與新的textwatcher一起被調用。將textwatcher作爲標籤存儲在EditText上以跟蹤它。

Object oldWatcher = viewHolder.quantitySold.getTag(); 
if(oldWatcher != null){ 
    viewHolder.quantitySold.removeTextChangedListener((CustomTextWatcher)oldWatcher); 
} 
String oldText = inputValues.get("key"+position); 
Log.d(TAG, "oldText: "+oldText+" position: "+position); 
viewHolder.quantitySold.setText(oldText == null ? "" : oldText); 
CustomTextWatcher watcher = new CustomTextWatcher(
     cursor.getString(SKUFragment.COL_NAME), 
     cursor.getInt(SKUFragment.COL_ID), 
     cursor.getDouble(SKUFragment.COL_UNIT_PRICE), 
     position 
) { 
    @Override 
    public void beforeTextChanged(CharSequence s, int start, int count, int after) { 

    } 

    @Override 
    public void onTextChanged(CharSequence s, int start, int before, int count) { 

    } 

    @Override 
    public void afterTextChanged(Editable s) { 
     if (s != null) { 
      int quantity = 0; 
      if (!TextUtils.isEmpty(s.toString())) { 
       quantity = Integer.parseInt(s.toString()); 
       inputValues.put("key"+mPosition, "" + quantity); 
      }else{ 
       inputValues.put("key"+mPosition, ""); 
      } 
      double value = quantity * skuPrice; 
      mListener.onQuantityChanged(skuName+", position: "+mPosition, skuId, quantity, value); 
     } 
    } 
}; 
viewHolder.quantitySold.setTag(watcher); 
viewHolder.quantitySold.addTextChangedListener(watcher);