Spinner实现onItemSelected

Question

在片段中我有片段，我将自定义微调器

public class ModeManual extends Fragment {
TextView textDetail;
private Bundle arguments;
private ArrayList<LvItem> myItems = new ArrayList<LvItem>();
public static final ModeManual newInstance(String myString) {
    ModeManual f = new ModeManual();
    Bundle arguments = new Bundle();
    arguments.putString("myTxt", myString);
    f.setArguments(arguments);
    return f;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup viewGroup, Bundle savedInstanceState) {
    arguments = getArguments();
    View v = inflater.inflate(R.layout.fragment_manual_mode, viewGroup, false);
    final MySpinner spinner = (MySpinner) v.findViewById(R.id.spinner);
    //arrayadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(new ItemAdapter(getActivity().getBaseContext(), R.layout.my_list_item, spinner.getItems()));
    return v;
}

} Spinner类是

public class MySpinner extends Spinner implements AdapterView.OnItemSelectedListener{
private String[] itemText = null;//holds the title for each item
private String[] itemEntryVal = null;//holds the value for each item
private String listDesc, selectedVal, crtCtrlKey, defaultVal;
private int[] itemIco;//holds the icon resource id for each item
private int idx;
private List<LvItem> myItems;

private Context context;
private ImageView myIcon;
private SharedPreferences preferences;
private TextView myTitle;

public MySpinner(Context context) {
    super(context);
}

public MySpinner(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.context = context;
    Resources resources = context.getResources();
    preferences = PreferenceManager.getDefaultSharedPreferences(context);
    ItemCollection coll = new ItemCollection(context,
            attrs,
            R.styleable.MySpinner,
            R.styleable.MySpinner_spinIco,
            R.styleable.MySpinner_android_entries,
            R.styleable.MySpinner_spinDesc,
            R.styleable.MySpinner_android_entryValues,
            R.styleable.MySpinner_android_key,
            R.styleable.MySpinner_android_defaultValue);

    listDesc = coll.getStrDesc();
    selectedVal = coll.getSelVal();
    crtCtrlKey = coll.getCtrlKey();
    defaultVal = coll.getDefVal();
    itemIco = coll.getIcons();
    itemText = coll.getText();
    itemEntryVal = coll.getEntries();
    idx = Integer.parseInt(coll.getSelVal());
}
public void setItem(int index, AdapterView<?> parentView){
    ItemAdapter adapter = (ItemAdapter) parentView.getAdapter();
        Log.v("setItem", "setItem " + index + "items ");
        for (int i = 0; i < adapter.getCount(); i++) {
            LvItem item = adapter.getItem(i);
            boolean sel = index == i ? true : false;
            item.setItemChecked(sel);
        }
        SharedPreferences.Editor editor = preferences.edit();
        editor.putString(crtCtrlKey, itemEntryVal[index]);
        editor.commit();

}

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

//My Code
}

@Override
public void onNothingSelected(AdapterView<?> parent) {

    //myCode
}
public ArrayList getItems() {
    ArrayList<LvItem> myItems = new ArrayList<LvItem>();
    for (int i = 0; i < itemText.length; i++) {
        myItems.add(new LvItem(itemIco[i], itemText[i], listDesc +itemText[i], selectedVal.equals(itemEntryVal[i]) ? true : false));
    }
    return myItems;
}

}

如何从片段中设置onItemSelected？或者应该如何停止？

这通常在片段/活动中实现，但我会在不同的片段中使用类似的控制微调器，所以我希望onItemSelected对所有人都是通用的。

Answer 1

您不需要在OnItemSelectedListener中实施MySpinner，您可以像这样在片段/活动中执行此操作。

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }
});

Answer 2

我已经解决了以下问题

片段

    @Override
public View onCreateView(LayoutInflater inflater, ViewGroup viewGroup, Bundle savedInstanceState) {
    arguments = getArguments();
    View v = inflater.inflate(R.layout.fragment_manual_mode, viewGroup, false);
    final MySpinner spinner = (MySpinner) v.findViewById(R.id.spinner);
    return v;
}

和MySpinner

public class MySpinner extends Spinner implements AdapterView.OnItemSelectedListener{
private String[] itemText = null;//holds the title for each item
private String[] itemEntryVal = null;//holds the value for each item
private String listDesc, selectedVal, crtCtrlKey, defaultVal;
private int[] itemIco;//holds the icon resource id for each item
private int idx;

private Context context;
private ImageView myIcon;
private SharedPreferences preferences;
private TextView myTitle;
ItemAdapter myAdapter;

public MySpinner(Context context) {
    super(context);
    super.setOnItemSelectedListener(this);
}

public MySpinner(Context context, AttributeSet attrs) {
    super(context, attrs);
    super.setOnItemSelectedListener(this);
    this.context = context;
    Resources resources = context.getResources();
    preferences = PreferenceManager.getDefaultSharedPreferences(context);
    ItemCollection coll = new ItemCollection(context,
            attrs,
            R.styleable.MySpinner,
            R.styleable.MySpinner_spinIco,
            R.styleable.MySpinner_android_entries,
            R.styleable.MySpinner_spinDesc,
            R.styleable.MySpinner_android_entryValues,
            R.styleable.MySpinner_android_key,
            R.styleable.MySpinner_android_defaultValue);

    listDesc = coll.getStrDesc();
    selectedVal = coll.getSelVal();
    crtCtrlKey = coll.getCtrlKey();
    defaultVal = coll.getDefVal();
    itemIco = coll.getIcons();
    itemText = coll.getText();
    itemEntryVal = coll.getEntries();
    idx = Integer.parseInt(coll.getSelVal());
    initialize();

}
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
    if(i!=idx) {
        int cnt = adapterView.getCount();
        for (int j = 0; j < cnt; j++) {
            LvItem item = (LvItem) adapterView.getItemAtPosition(j);
            item.setItemChecked(i == j ? true : false);
        }
        myAdapter.notifyDataSetChanged();
        idx = i;
        SharedPreferences.Editor editor = preferences.edit();
        editor.putString(crtCtrlKey, itemEntryVal[i]);
        editor.commit();
    }
}

@Override
public void onNothingSelected(AdapterView<?> adapterView) {

}

private void initialize() {
    ArrayList<LvItem> myItems = new ArrayList<LvItem>();
    for (int i = 0; i < itemText.length; i++) {
        myItems.add(new LvItem(itemIco[i], itemText[i], listDesc +itemText[i], selectedVal.equals(itemEntryVal[i]) ? true : false));
    }
    myAdapter = new ItemAdapter(super.getContext(), R.layout.my_list_item, myItems);
    myAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    setAdapter(myAdapter);
    super.setSelection(idx);
}

}