Question

我正在尝试创建一个Spinner，其中填充了我在Java中创建的Array数据，该数据从文本文件中读取。

（它被称为pokemon.txt，所以这是720个条目..单独输入这些是愚蠢的，所以我觉得使用文本文件并从中读取将是最佳的。）

Spinner spinner;

public static void main(String[] args) throws IOException {
    List<String> lines = new ArrayList<String>();
    BufferedReader reader = null;
    try {
        reader = new BufferedReader(new FileReader("pokemon.txt"));
        String line = null;
        while ((line = reader.readLine()) != null) {
            lines.add(line);
        }
    } finally {
        reader.close();
    }
    String[] array = (String[]) lines.toArray();
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_menu);

    Typeface Dotum = Typeface.createFromAsset(getAssets(),"fonts/gulim.ttc");
    TextView myTextView = (TextView)findViewById(R.id.jingenMenu1);
    myTextView.setTypeface(Dotum);

    spinner=(Spinner) findViewById(R.id.pkmnSel1);
    ArrayAdapter adapter = ArrayAdapter.createFromResource(this,    , android.R.layout.simple_spinner_item); //I know it's missing the source but, that's where I'm
    spinner.setAdapter(adapter);                                                                             //lost because I can't figure out how to populate it with my array.
}

我知道我的代码可能非常混乱和/或不正确但是，这有点过头了，所以我真的想尽可能多地了解这个。

如果有一种更简单的方法，甚至可能是将文件直接读入XML数组的方法，请随时告诉我。一切都有帮助。

感谢阅读，并且提前非常感谢。

Answer 1

Android中没有main()功能，如上面提到的@codeMagic。 onCreate()是在创建应用程序时运行的函数。您可以创建一个新函数，为Spinner返回Array并在onCreate()中调用它，如下所示：

@Override 
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_menu);

    Typeface Dotum = Typeface.createFromAsset(getAssets(),"fonts/gulim.ttc");
    TextView myTextView = (TextView)findViewById(R.id.jingenMenu1);
    myTextView.setTypeface(Dotum);

    String[] array = yourFunctionThatReturnsArray();

    spinner=(Spinner) findViewById(R.id.pkmnSel1);
    ArrayAdapter adapter = ArrayAdapter.createFromResource(this,array    , android.R.layout.simple_spinner_item); //I know it's missing the source but, that's where I'm
    spinner.setAdapter(adapter);                                                                             //lost because I can't figure out how to populate it with my array.
} 

public String[] yourFunctionThatReturnsArray(){
       String[] array = new String[SIZE];
       // put anything in array
       return array;
}

如何用我在Java中创建的数组填充微调器？

1 个答案: