java android getResources（）。getIdentifier（） [英] java android getResources().getIdentifier()

问题描述

如何从r获取id的int id值？当我使用 getIdentifier 时，它只返回 0 。

How do I get the int id value from R. for an id? When I use getIdentifier its just returns 0.

 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());

修改

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>

log

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;

推荐答案

问题似乎是您正在转换<$小写的c $ c> drawerSelection 。如R.java文件中所示，标识符的大小写被保留。尝试调用：

The problem appears to be that you are converting drawerSelection to lower case. As is clear in the R.java file, the case of the identifier is preserved. Try calling:

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

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