Question

我正在使用AndroidHive: Material Design中的模板，并决定在每个导航抽屉行上添加一些图标。我已经修改了模型NavDrawerItem，添加了图标的getter和setter。

// Constructor
public NavDrawerItem(boolean showNotify, String title, int icon) {
    this.showNotify = showNotify;
    this.title = title;
    this.icon = icon;
}

public String getTitle() {
    return title;
}

public int getIcon(){
    return icon;
}

public void setTitle(String title) {
    this.title = title;
}

public void setIcon(int icon){
    this.icon = icon;
}

它的适配器（NavigationDrawerAdapter）也被修改，添加了图标支持

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
    NavDrawerItem current = data.get(position);
    holder.title.setText(current.getTitle());
    holder.icon.setImageResource(current.getIcon());
}

class MyViewHolder extends RecyclerView.ViewHolder {
    TextView title;
    ImageView icon;

    public MyViewHolder(View itemView) {
        super(itemView);
        title = (TextView) itemView.findViewById(R.id.title);
        icon = (ImageView) itemView.findViewById(R.id.icon_drawer);
    }
}

我知道这个抽屉是在FragmentDrawer.java的onCreate方法上添加的

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // drawer labels
    titles = getActivity().getResources().getStringArray(R.array.nav_drawer_labels);
    icons = getActivity().getResources().getIntArray(R.array.nav_drawer_icon);
}

这是我在string.xml中的数组

<string-array name="nav_drawer_labels">
    <item>@string/nav_item_home</item>
    <item>@string/nav_item_data_visualization</item>
    <item>@string/nav_item_pending_item</item>
    <item>@string/nav_item_my_profile</item>
    <item>@string/nav_item_about_us</item>
</string-array>

<string-array name="nav_drawer_icon">
    <item>@drawable/ic_home</item>
    <item>@drawable/ic_data_visualization</item>
    <item>@drawable/ic_pending_item</item>
    <item>@drawable/ic_profile_drawer</item>
    <item>@drawable/ic_about</item>
</string-array>

我的导航抽屉项目是使用FragmentDrawer.java中的这段代码从资源填充的

public static List<NavDrawerItem> getData() {
    List<NavDrawerItem> data = new ArrayList<>();

    // preparing navigation drawer items
    for (int i = 0; i < titles.length; i++) {
        NavDrawerItem navItem = new NavDrawerItem();
        navItem.setTitle(titles[i]);
        System.out.println(titles[i]);

        navItem.setIcon(icons[i]);
        System.out.println(icons[i]);

        data.add(navItem);
    }
    return data;
}

我的问题是从资源中填充图标，在System.out.println（icons [i]）上面的代码中;总是给我0值。我想这就是为什么我不能设置导航抽屉图标的imageResource。

任何帮助将不胜感激。谢谢。

Answer 1

问题在于：

icons = getActivity().getResources().getIntArray(R.array.nav_drawer_icon);

要从数组中读取资源ID，您可以使用以下代码：

icons = new int[titles.length];
TypedArray iconsArray = getResources().obtainTypedArray(R.array.nav_drawer_icon);
for (int i = 0; i < icons.length; i++)
    icons[i] = iconsArray.getResourceId(i, -1);

iconsArray.recycle();

但可能最好的行动是使用NavigationView。

Android：导航抽屉图标

1 个答案: