我在recyclerview中有一个textview，显示保存在sqlite数据库中的十进制货币值。但当我在数据库中输入10.00美元时，recyclerview textview显示为10美元而不是10.00美元。我该如何解决这个问题？
这是我对recyclerview的布局：
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/pound"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxLines="1"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:paddingStart="8dp"
android:text="£"
android:textSize="20sp"
android:textColor="@color/fab2_color"/>
<TextView
android:id="@+id/favourite_textView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_weight="1"
android:maxLength="9"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:textSize="20sp"
android:textColor="@color/fab2_color"
/>
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:layout_marginEnd="5dp"
android:layout_marginRight="5dp"
android:color="#ffffff" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingTop="30dp">
<TextView
android:id="@+id/category_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:maxLines="1"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:paddingStart="8dp"/>
<TextView
android:id="@+id/verse_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_weight="1"
android:gravity="end"
android:maxLines="1"
android:paddingBottom="5dp"
android:paddingTop="5dp" />
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:layout_marginEnd="5dp"
android:layout_marginRight="5dp"
android:color="#ffffff" />
</android.support.v7.widget.CardView>
这是我将值插入数据库的地方：
public void AddData(){
FloatingActionButton fab2 = (FloatingActionButton) findViewById(R.id.fab_tick_income);
fab2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
formatter = new DecimalFormat("0.00");
RawincomeValue = editAmountincome.getRawValue();
FormatedincomeVal = (double) RawincomeValue/100;
if (FormatedincomeVal > 0){
isAmountInserted = true;
}
else{
isAmountInserted = false;
}
noteCheck = editNotesincome.getText().toString().trim();
if(noteCheck.isEmpty())
{
noteCheck = noteCheck.replace("", "No Note Inserted");
}
else
{
//EditText is not empty
}
if(isCategoryInserted && isDateInserted && isAmountInserted && isAccountInserted) {
myDbincome.insertincomeData(
FormatedincomeVal,
editDateincome.getText().toString(),
noteCheck,
category,
account);
Toast.makeText(add_income.this,"Income Registered",Toast.LENGTH_LONG).show();
Intent intent=new Intent(add_income.this, MainActivity.class);
startActivity(intent);
}
适配器视图：
public class IncomeAdapter extends RecyclerView.Adapter<IncomeAdapter.ViewHolder> {
private final ArrayList<String> dataSet;
private final ArrayList<String> dataSet2;
private final ArrayList<String> dataSet3;
private ItemClickListener clickListener;
DecimalFormat formatter = new DecimalFormat("0.00");
String myListPreference;
Context ctx;
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
final TextView pound;
final TextView mTextView;
final TextView textView;
final TextView categoryText;
final CardView cardView;
ViewHolder(View v) {
super(v);
SharedPreferences sharedPreferences = android.support.v7.preference.PreferenceManager.getDefaultSharedPreferences(ctx);
myListPreference = sharedPreferences.getString("CurrencyType", "£");
pound = (TextView) v.findViewById(R.id.pound);
mTextView = (TextView) v.findViewById(R.id.favourite_textView);
categoryText = (TextView) v.findViewById(R.id.category_text);
textView = (TextView) v.findViewById(R.id.verse_text);
cardView = (CardView) v.findViewById(R.id.cardview);
pound.setText(""+ myListPreference);
v.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (clickListener != null) clickListener.onClick(view, getAdapterPosition());
}
}
public IncomeAdapter(ArrayList<String> myDataset, ArrayList<String> myDataSet2, ArrayList<String> myDataset3, Context ctx) {
this.dataSet = myDataset;
this.dataSet2 = myDataSet2;
this.dataSet3 = myDataset3;
this.ctx = ctx;
}
我如何将信息放入recyclerview：
private void populateListView() {
Log.d(TAG, "populateListView: Displaying data in the ListView.");
ArrayList<String> arrayList = new ArrayList<>();
ArrayList<String> arrayList2 = new ArrayList<>();
ArrayList<String> arrayList3 = new ArrayList<>();
IncomeAdapter incomeAdapter = new IncomeAdapter(arrayList,arrayList2,arrayList3, getContext());
mListView.setAdapter(incomeAdapter);
incomeAdapter.setClickListener(this);
incomedata = mDatabaseHelper.getincomeData();
if(incomedata.moveToFirst()){
do {
arrayList.add(incomedata.getString(incomedata.getColumnIndex(DatabaseHelper.INCOME_AMOUNT)));
arrayList2.add(incomedata.getString(incomedata.getColumnIndex(DatabaseHelper.INCOME_DATE)));
arrayList3.add(incomedata.getString(incomedata.getColumnIndex(DatabaseHelper.INCOME_CATEGORY)));
}
while (incomedata.moveToNext());
}
incomeAdapter.notifyDataSetChanged();
}
答案 0 :(得分：0)
textview.setText（String.format（＆＃34; Value a：％。2f＆＃34;，a））;