java - 如何在android中将double转换为string

Question

我想在我的构造函数中将string转换成double，我不能在我的构造函数中改变它，因为在一个过程中，变量必须是double，而其他类必须是string，你能告诉我转换的方法吗它..？这是我的构造函数:

public class DataItem {
String ijiInvest, ijiId;
String tanggal;
double persenHmint1,inuNilai  selisih,persen_hke1;

public DataItem(String ijiInvest, double persenHmint1, Double inuNilai, 
        double selisih,double persen_hke1, String tanggal,String ijiId) {
    // TODO Auto-generated constructor stub
    this.ijiInvest = ijiInvest;
    this.persenHmint1 = persenHmint1;
    this.inuNilai = inuNilai;
    this.selisih = selisih;
    this.ijiId = ijiId;
    this.tanggal = tanggal;
    this.persen_hke1=persen_hke1;
}

public String getIjiInvest() {
    return ijiInvest;
}

public String getIjiId() {
    return ijiId;
}

public String getTanggal() {

    return tanggal;
}

public double getPersenHmint1() {
    return persenHmint1;
}

public Double getInuNilai() {
    return inuNilai;
}

public double getSelisih() {
    return selisih;
}

public double persen_hke1(){
    return persen_hke1;
}

在我的基本适配器中，我想将 getInuNilai() 更改为字符串这是我的基本适配器:

public class TabelAdapter extends BaseAdapter{
Context context;
ArrayList<DataItem> listData;//stack
int count;

public TabelAdapter(Context context, ArrayList<DataItem>listData){
    this.context=context;
    this.listData=listData;
    this.count=listData.size();
}
@Override
public int getCount() {
    // TODO Auto-generated method stub
    return count;
}

@Override
public Object getItem(int arg0) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public View getView(int position, View v, ViewGroup parent) {
    // TODO Auto-generated method stub
    View view= v;
    ViewHolder holder= null;

    if(view==null){
        LayoutInflater inflater=(LayoutInflater)context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
        view= inflater.inflate(R.layout.main, null);
        holder=new ViewHolder();
        holder.nama=(TextView)view.findViewById(R.id.name);
        holder.email=(TextView)view.findViewById(R.id.email);
        view.setTag(holder);
    }
    else{
        holder=(ViewHolder)view.getTag();

    }
    holder.nama.setText(listData.get(position).getTanggal());
//      holder.email.setText(listData.get(position).getInuNilai());
    return view;
}
static class ViewHolder{
    TextView nama, email;
}

我不能 setText getInuNilai() 因为它的返回值是 double，你能告诉我如何转换它吗？

Answer 1

      String yourDoubleString = String.valueOf(yourDouble);

如果您希望将 getInuNilai() 方法的返回值作为字符串返回:

首先从这个方法得到你的替身:

    double inuNilaiDouble = getInuNilai(); 

并将其解析为字符串:

     String inuNilaiString = String.valueOf(inuNilaiDouble);

或

     String inuNilaiString = Double.toString(inuNilaiDouble);

如果您希望在您的 DataItem.java 之外使用它，请引用 DataItem 并获取 double 值:

    double inuNilaiDouble = mReferenceOfDataItem.getInuNilai(); 

然后将其解析为如上所示的字符串。