Android 如何创建与字符串数组名关联的动态变量？

有一些字符串数组是微调器的数据源：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="regions">
        <item>Analamanga</item>
        <item>Diana</item>
    </string-array>
    <string-array name="districts_region0"> // the 0 corresponds to the item at position 0
        <item>Central</item>
    </string-array>
    <string-array name="districts_region1"> // the 1 corresponds to the item at position 1
        <item>Nosy-be</item>
        <item>Sambava</item>
    </string-array>
</resources>

---

但是这个崩溃了！那么如何动态设置spinnerDistrict的适配器呢？

尝试使用以下帮助器方法：

public static int getResIdFromString(Context context, String path){
    int resID = context.getResources().getIdentifier(path, "drawable", context.getPackageName());

    return resID;
}

int rid = Utils.getResIdFromString(context, "icon" + i.toLowerCase());

private class ExampleAdapter extends ArrayAdapter<String> {

    private final int[] strings = new int[] {
            R.id.string1,
            R.id.string2,
            R.id.string3,
    };

    private ExampleAdapter(Context context, int resource) {
        super(context, resource);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId) {
        super(context, resource, textViewResourceId);
    }

    public ExampleAdapter(Context context, int resource, String[] objects) {
        super(context, resource, objects);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId, String[] objects) {
        super(context, resource, textViewResourceId, objects);
    }

    private ExampleAdapter(Context context, int resource, List<String> objects) {
        super(context, resource, objects);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId, List<String> objects) {
        super(context, resource, textViewResourceId, objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = super.getView(position, convertView, parent);

        int stringResId = getStringForPosition(position);
        TextView tvText = view.findViewById(R.id.tvText);
        tvText.setText(stringResId);

        return view;
    }

    private int getStringForPosition(int position) {
        return strings[position % strings.length];
    }
}

你可以这样使用它：

public static int getResIdFromString(Context context, String path){
    int resID = context.getResources().getIdentifier(path, "drawable", context.getPackageName());

    return resID;
}

int rid = Utils.getResIdFromString(context, "icon" + i.toLowerCase());

private class ExampleAdapter extends ArrayAdapter<String> {

    private final int[] strings = new int[] {
            R.id.string1,
            R.id.string2,
            R.id.string3,
    };

    private ExampleAdapter(Context context, int resource) {
        super(context, resource);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId) {
        super(context, resource, textViewResourceId);
    }

    public ExampleAdapter(Context context, int resource, String[] objects) {
        super(context, resource, objects);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId, String[] objects) {
        super(context, resource, textViewResourceId, objects);
    }

    private ExampleAdapter(Context context, int resource, List<String> objects) {
        super(context, resource, objects);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId, List<String> objects) {
        super(context, resource, textViewResourceId, objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = super.getView(position, convertView, parent);

        int stringResId = getStringForPosition(position);
        TextView tvText = view.findViewById(R.id.tvText);
        tvText.setText(stringResId);

        return view;
    }

    private int getStringForPosition(int position) {
        return strings[position % strings.length];
    }
}

---

您可以像这样使用自定义

适配器

：

public static int getResIdFromString(Context context, String path){
    int resID = context.getResources().getIdentifier(path, "drawable", context.getPackageName());

    return resID;
}

int rid = Utils.getResIdFromString(context, "icon" + i.toLowerCase());

private class ExampleAdapter extends ArrayAdapter<String> {

    private final int[] strings = new int[] {
            R.id.string1,
            R.id.string2,
            R.id.string3,
    };

    private ExampleAdapter(Context context, int resource) {
        super(context, resource);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId) {
        super(context, resource, textViewResourceId);
    }

    public ExampleAdapter(Context context, int resource, String[] objects) {
        super(context, resource, objects);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId, String[] objects) {
        super(context, resource, textViewResourceId, objects);
    }

    private ExampleAdapter(Context context, int resource, List<String> objects) {
        super(context, resource, objects);
    }

    private ExampleAdapter(Context context, int resource, int textViewResourceId, List<String> objects) {
        super(context, resource, textViewResourceId, objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = super.getView(position, convertView, parent);

        int stringResId = getStringForPosition(position);
        TextView tvText = view.findViewById(R.id.tvText);
        tvText.setText(stringResId);

        return view;
    }

    private int getStringForPosition(int position) {
        return strings[position % strings.length];
    }
}

私有类ExampleAdapter扩展了ArrayAdapter{
私有最终整数[]字符串=新整数[]{
R.id.1，
R.id.2，
R.id.3，
};
私有ExampleAdapter（上下文，int资源）{
超级（上下文、资源）；
}
私有ExampleAdapter（上下文上下文、int资源、int textViewResourceId）{
超级（上下文、资源、textViewResourceId）；
}
公共示例适配器（上下文、int资源、字符串[]对象）{
超级（上下文、资源、对象）；
}
私有ExampleAdapter（上下文上下文、int资源、int textViewResourceId、字符串[]对象）{
超级（上下文、资源、textViewResourceId、对象）；
}
私有ExampleAdapter（上下文、int资源、列表对象）{
超级（上下文、资源、对象）；
}
私有ExampleAdapter（上下文上下文、int资源、int textViewResourceId、列表对象）{
超级（上下文、资源、textViewResourceId、对象）；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
视图=super.getView（位置、转换视图、父级）；
int stringResId=getStringForPosition（位置）；
TextView tvText=view.findViewById（R.id.tvText）；
tvText.setText（stringResId）；
返回视图；
}
私有整型getStringForPosition（整型位置）{
返回字符串[位置%strings.length]；
}
}

---

此

ExampleAdapter

将循环遍历顶部定义的字符串，并将它们分配给列表项中的

TextView

——在本例中为

R.id.tvText

。

您需要找到

字符串数组的资源id，如下所示

String tag = "districts_region"+pos;

int resourceId = getResources().getIdentifier(tag, "array", getPackageName());

然后呢,

ArrayAdapter<CharSequence> districtAdapter = ArrayAdapter.createFromResource(this,
                resourceId, android.R.layout.simple_spinner_item);

ArrayAdapter districtAdapter=ArrayAdapter.createFromResource（此，
resourceId，android.R.layout.simple\u微调器\u项）；
请发布您的logcat输出。您可以创建自定义
适配器来执行此操作。logcat为空，应用程序在打开活动之前崩溃！