java - android spinner getPosition() 从字符串子字符串

Question

再见，

我在 Android 应用程序上有 5 个 spinner。如果没有值，这些spinner必须默认为以 00 开头的旋转器，或者默认为数据库中保存的值的substring(0,2)。

datasource = new Source(this); 
    datasource.open();

    List<Data> values = datasource.getAll(num);

    for (Data c: values)
    {
    d1 = c.getd1();
    d2 = c.getd2();
    d3 = c.getd3();
    d4 = c.getd4();
    d5 = c.getd5();
    }

    if (d1.isEmpty())
    {
    d1 = "00";  
    }

    if (d2.isEmpty())
    {
    d2 = "00";  
    }

    if (dev3.isEmpty())
    {
    dev3 = "00";    
    }

    if (dev4.isEmpty())
    {
    dev4 = "00";    
    }

    if (d5.isEmpty())
    {
    d5 = "00";  
    }

    Spinner location1 = (Spinner)findViewById(R.id.spind1);
    Spinner location2 = (Spinner)findViewById(R.id.spind2);
    Spinner location3 = (Spinner)findViewById(R.id.spind3);
    Spinner location4 = (Spinner)findViewById(R.id.spind4);
    Spinner location5 = (Spinner)findViewById(R.id.spind5);

    ArrayAdapter myAdap1 = (ArrayAdapter) location1.getAdapter();
    ArrayAdapter myAdap2 = (ArrayAdapter) location2.getAdapter();
    ArrayAdapter myAdap3 = (ArrayAdapter) location3.getAdapter();
    ArrayAdapter myAdap4 = (ArrayAdapter) location4.getAdapter();
    ArrayAdapter myAdap5 = (ArrayAdapter) location5.getAdapter();

    int spinnerPosition1 = myAdap1.getPosition(d1);
    int spinnerPosition2 = myAdap2.getPosition(d2);
    int spinnerPosition3 = myAdap3.getPosition(d3);
    int spinnerPosition4 = myAdap4.getPosition(d4);
    int spinnerPosition5 = myAdap5.getPosition(d5);

//set the default according to value
    location1.setSelection(spinnerPosition1);
    location2.setSelection(spinnerPosition2);
    location3.setSelection(spinnerPosition3);
    location4.setSelection(spinnerPosition4);
    location5.setSelection(spinnerPosition5);

问题是我只想通过 substring 值来获取 spinner 位置。例如 d1 可以是保存在数据库中的“00”、“01”、“02”、“03”，但 spinner 数组中的值是:

“00:无”“01:全部”《02:一半》“03:季度”

那么我该如何使用:int spinnerPosition1 = myAdap1.getPosition(d1);它显然会检查“01”!=“01:All”。所以我需要对 spinner 字符串进行子串？有谁能够帮助我？

Answer 1

str.substring(0, 2); 

对前两个字符使用子字符串。