Android getIdentifier返回0x1？

在运行我的应用程序的一小部分设备上，用户通过首选项更改图像时会发生崩溃。完整堆栈跟踪：

java.lang.RuntimeException: Unable to resume activity {com.printandpixel.lolhistory/com.printandpixel.lolhistory.activities.MainActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x1
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3346)
    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3377)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2728)
    at android.app.ActivityThread.access$900(ActivityThread.java:172)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:145)
    at android.app.ActivityThread.main(ActivityThread.java:5832)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x1
    at android.content.res.Resources.getValue(Resources.java:2329)
    at android.content.res.Resources.getDrawable(Resources.java:1846)
    at android.content.res.Resources.getDrawable(Resources.java:1814)
    at com.printandpixel.lolhistory.util.GeneralUtils.getDrawableFromName(GeneralUtils.java:226)
    at com.printandpixel.lolhistory.util.GeneralUtils.getHomepageHeader(GeneralUtils.java:277)
    at com.printandpixel.lolhistory.activities.MainActivity.onResume(MainActivity.java:252)
    at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1255)
    at android.app.Activity.performResume(Activity.java:6338)
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3335)
    ... 11 more

此处引用的函数getDrawableFromName中的行如下所示：

返回context.getResources（）.getDrawable（resourceId）

该方法的全面实施如下所示：

public static Drawable getDrawableFromName(String name, Context context) {
    int resourceId = context.getResources().getIdentifier(name, "drawable", context.getPackageName());
    if (resourceId > 0) {
        return context.getResources().getDrawable(resourceId);
    } else {
        Tracker t = ((LoLHistory) ((Activity) context).getApplication()).getTracker(LoLHistory.TrackerName.APP_TRACKER);
        t.send(new HitBuilders.EventBuilder().setCategory("EVENT").setAction("DrawableNotFound").setLabel(name).build());
        return null;
    }
}

public static Drawable getDrawableFromName(String name, Context context) {
    int resourceId = context.getResources().getIdentifier(name, "drawable", context.getPackageName());
    Drawable drawable = null;
    try {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            drawable = context.getResources().getDrawable(resourceId, context.getTheme());
        } else {
            drawable = context.getResources().getDrawable(resourceId);
        }
    } catch (Resources.NotFoundException e) {
        Tracker t = ((LoLHistory) ((Activity) context).getApplication()).getTracker(LoLHistory.TrackerName.APP_TRACKER);
        t.send(new HitBuilders.EventBuilder().setCategory("EVENT").setAction("DrawableNotFound").setLabel(name).build());
    }
    return drawable;
}

public static Drawable getHomepageHeader(Context context) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    String headerImageName = prefs.getString(context.getString(R.string.pref_champion_header_name), "darius_600");
    Drawable drawable = getDrawableFromName(headerImageName, context);
    if (drawable == null) {
        drawable = new ColorDrawable(ContextCompat.getColor(context, R.color.green));
    }
    return drawable;
}

据我所知，到目前为止，这只发生在安卓5上，而不是所有安卓5设备上。据我所知，文档指定，如果未找到可绘制文件，则
getIdentifier
应返回0，但在本例中，它返回0x1？我的应用程序中有数百个不同的图像，所有用户报告都将0x1作为无效id

假设1的ResourceSID都无效是否安全

编辑：根据@ρ∑ρѕρєK建议，为了处理getDrawable（id）的弃用，并在意外未找到资源时优雅地失败，我已将我的函数编辑为：

public static Drawable getDrawableFromName(String name, Context context) {
    int resourceId = context.getResources().getIdentifier(name, "drawable", context.getPackageName());
    if (resourceId > 0) {
        return context.getResources().getDrawable(resourceId);
    } else {
        Tracker t = ((LoLHistory) ((Activity) context).getApplication()).getTracker(LoLHistory.TrackerName.APP_TRACKER);
        t.send(new HitBuilders.EventBuilder().setCategory("EVENT").setAction("DrawableNotFound").setLabel(name).build());
        return null;
    }
}

public static Drawable getDrawableFromName(String name, Context context) {
    int resourceId = context.getResources().getIdentifier(name, "drawable", context.getPackageName());
    Drawable drawable = null;
    try {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            drawable = context.getResources().getDrawable(resourceId, context.getTheme());
        } else {
            drawable = context.getResources().getDrawable(resourceId);
        }
    } catch (Resources.NotFoundException e) {
        Tracker t = ((LoLHistory) ((Activity) context).getApplication()).getTracker(LoLHistory.TrackerName.APP_TRACKER);
        t.send(new HitBuilders.EventBuilder().setCategory("EVENT").setAction("DrawableNotFound").setLabel(name).build());
    }
    return drawable;
}

public static Drawable getHomepageHeader(Context context) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    String headerImageName = prefs.getString(context.getString(R.string.pref_champion_header_name), "darius_600");
    Drawable drawable = getDrawableFromName(headerImageName, context);
    if (drawable == null) {
        drawable = new ColorDrawable(ContextCompat.getColor(context, R.color.green));
    }
    return drawable;
}

问题最终不是由于
getDrawableFromName
函数引起的。这实际上是完全不相关的：（.我的应用程序中有另一个函数来获取特定的默认首选项值，如下所示：

public static Drawable getDrawableFromName(String name, Context context) {
    int resourceId = context.getResources().getIdentifier(name, "drawable", context.getPackageName());
    if (resourceId > 0) {
        return context.getResources().getDrawable(resourceId);
    } else {
        Tracker t = ((LoLHistory) ((Activity) context).getApplication()).getTracker(LoLHistory.TrackerName.APP_TRACKER);
        t.send(new HitBuilders.EventBuilder().setCategory("EVENT").setAction("DrawableNotFound").setLabel(name).build());
        return null;
    }
}

public static Drawable getDrawableFromName(String name, Context context) {
    int resourceId = context.getResources().getIdentifier(name, "drawable", context.getPackageName());
    Drawable drawable = null;
    try {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            drawable = context.getResources().getDrawable(resourceId, context.getTheme());
        } else {
            drawable = context.getResources().getDrawable(resourceId);
        }
    } catch (Resources.NotFoundException e) {
        Tracker t = ((LoLHistory) ((Activity) context).getApplication()).getTracker(LoLHistory.TrackerName.APP_TRACKER);
        t.send(new HitBuilders.EventBuilder().setCategory("EVENT").setAction("DrawableNotFound").setLabel(name).build());
    }
    return drawable;
}

public static Drawable getHomepageHeader(Context context) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    String headerImageName = prefs.getString(context.getString(R.string.pref_champion_header_name), "darius_600");
    Drawable drawable = getDrawableFromName(headerImageName, context);
    if (drawable == null) {
        drawable = new ColorDrawable(ContextCompat.getColor(context, R.color.green));
    }
    return drawable;
}

此首选项是在
首选项活动
中使用以下
列表首选项
设置的：

<ListPreference
    android:key="pref_champion_header"
    android:entries="@array/headers"
    android:entryValues="@array/header_values"
    android:summary="Champion splash to appear at the top of the homepage"
    android:title="Homepage champion"
    android:defaultValue="1"/>



引用以下两个数组：

<string-array name="headers" translatable="false">
    <item>Darius</item>
    <item>Garen</item>
    <item>Malphite</item>
    <item>Gnar</item>
    <item>Buccaneer Tristana</item>
</string-array>
<string-array name="header_values" translatable="false">
    <item>darius_600</item>
    <item>garen_600</item>
    <item>malphite_600</item>
    <item>gnar_600</item>
    <item>buccaneer_tristana_600</item>
</string-array>


大流士
加伦
墨菲特
啃
特里斯塔纳海盗
大流士600
加伦乌600
马尔皮特600
纳鲁600
海盗号：特里斯塔纳600

无论出于何种原因，在某些设备上，
defaultValue=“1”
解析为
header\u值的第一个条目，而在其他设备上，它只是解析为
“1”
，结果是
“1”
被传递到我的自定义
getDrawableFromName
方法。为了解决这个问题，我只需将
defaultValue
更改为显式等于头值数组aka的第一个值
“darius_600”
getDrawable
方法在API级别22
中不推荐使用
getDrawable（int，Theme）
在级别22的更高版本上。@ρцσѕρєK谢谢你的提示。我已经更新了我的get drawable方法来解决这个问题，并且失败了。请参阅有问题的编辑。@alexgophermix你也可以使用
ContextCompat.getDrawable（上下文，int-id）
来自支持库。@b1izzard ah这将基本上取代修正案中if-else的需要。感谢您的建议