学习RecyclerView时点击条目触发Resources$NotFoundException致应用崩溃求助

我为学习Adapter和RecyclerView开发了一款应用，包含RecyclerView与Adapter，计划点击RecyclerView条目时通过数据类展示数据并启动详情Activity，但运行时点击条目会导致应用崩溃，抛出java resources not found exception。

崩溃日志 #

2022-07-24 16:00:14.903 11460-11460/com.example.planetapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.planetapp, PID: 11460
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.planetapp/com.example.planetapp.PlanetDetail}: android.content.res.Resources$NotFoundException: Resource ID #0xffffffff
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3430)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3614)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199)
        at android.os.Handler.dispatchMessage(Handler.java:112)
        at android.os.Looper.loop(Looper.java:216)
        at android.app.ActivityThread.main(ActivityThread.java:7625)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)
     Caused by: android.content.res.Resources$NotFoundException: Resource ID #0xffffffff
        at android.content.res.ResourcesImpl.getValue(ResourcesImpl.java:292)
        at android.content.res.Resources.getValue(Resources.java:1540)
        at androidx.appcompat.widget.ResourceManagerInternal.createDrawableIfNeeded(ResourceManagerInternal.java:180)
        at androidx.appcompat.widget.ResourceManagerInternal.getDrawable(ResourceManagerInternal.java:145)
        at androidx.appcompat.widget.ResourceManagerInternal.getDrawable(ResourceManagerInternal.java:136)
        at androidx.appcompat.content.res.AppCompatResources.getDrawable(AppCompatResources.java:66)
        at androidx.appcompat.widget.AppCompatImageHelper.setImageResource(AppCompatImageHelper.java:91)
        at androidx.appcompat.widget.AppCompatImageView.setImageResource(AppCompatImageView.java:102)
        at com.example.planetapp.PlanetDetail.setData(PlanetDetail.kt:37)
        at com.example.planetapp.PlanetDetail.onCreate(PlanetDetail.kt:20)
        at android.app.Activity.performCreate(Activity.java:7458)
        at android.app.Activity.performCreate(Activity.java:7448)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1286)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3409)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3614) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199) 
        at android.os.Handler.dispatchMessage(Handler.java:112) 
        at android.os.Looper.loop(Looper.java:216) 
        at android.app.ActivityThread.main(ActivityThread.java:7625) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)

问题分析 #

从崩溃栈可以明确：崩溃发生在PlanetDetail.kt第37行调用AppCompatImageView.setImageResource()时，传入的资源ID是0xffffffff（即-1），系统找不到对应的资源文件导致崩溃。

解决步骤 #

• 直接定位PlanetDetail.kt第37行代码，确认传入setImageResource()的参数值，该值应为合法的drawable资源ID（如R.drawable.planet_mars），而非-1。
• 回溯数据传递链路：
  • 检查RecyclerView Adapter中，点击条目时向详情Activity传递的图片资源ID是否正确，是否存在Intent传值错误。
  • 检查数据类定义，确保存储图片资源ID的字段类型为Int，且初始化时赋值的是有效资源ID，而非无效值。
• 在setData()方法中添加有效值校验，避免传入无效ID：

// PlanetDetail.kt的setData方法内
val imageResId = planet.imageResId
if (imageResId != -1) {
    // 可选：再验证资源是否存在
    try {
        resources.getDrawable(imageResId, theme)
        planetImageView.setImageResource(imageResId)
    } catch (e: Resources.NotFoundException) {
        planetImageView.setImageResource(R.drawable.default_placeholder)
    }
} else {
    planetImageView.setImageResource(R.drawable.default_placeholder)
}

• 调试时可以打印传入的资源ID，快速定位问题：

Log.d("PlanetDetail", "当前图片资源ID: $imageResId")

内容的提问来源于stack exchange，提问作者Catch The Code