java android getResources（）.getIdentifier（）

android java

2022-09-04 06:24:14

如何从 R 获取 id 的 int id 值？当我使用它只是返回.getIdentifier0

 int i = getArguments().getInt(SELECTION_NUMBER);
 String drawerSelection = getResources().getStringArray(R.array.drawerSelection_array)[i];

int panelId = this.getResources().getIdentifier(drawerSelection.toLowerCase(),"id",getActivity().getPackageName());

编辑

Xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ListView
    android:id="@+id/Bus_Schedules"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
</ListView>

</LinearLayout>

日志

06-10 21:24:30.372: I/System.out(3572): Selection = Bus_Schedules
06-10 21:24:30.372: I/System.out(3572): panelId = 0

R.java

    public static final class id {
    public static final int Bus_Schedules=0x7f090004;
    public static final int basemenu=0x7f090005;
    public static final int content_frame=0x7f090001;
    public static final int drawer_layout=0x7f090000;
    public static final int left_drawer=0x7f090002;

答案 1

问题似乎是您正在转换为小写。在 R.java 文件中清楚地显示，标识符的大小写将保留。尝试拨打电话：drawerSelection

int panelId = this.getResources().getIdentifier(drawerSelection,"id",getActivity().getPackageName());

答案 2

刚刚在我现在写的一个项目中检查了一下：

int id = getResources().getIdentifier("resourcename", "drawable", getPackageName());

getResources返回。int

更新：检查是否仅包括现有元素的 ID。R.array.drawerSelection_array