Android shrinkResources true 引发的血案-优快云博客

本文探讨了在使用Android应用打包时遇到的资源丢失问题，导致应用程序崩溃。通过开启shrinkResources和minifyEnabled选项进行资源精简，发现资源文件被移除。在尝试解决动态加载资源的需求后，分析了问题原因并提供了解决方案，同时讨论了程序包体积增加的影响。

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Android shrinkResources true 引发的血案

今天在众测我的App，发现我在代码里面动态调去取之前的图片资源时
一直报 Resources$NotFoundException: Resource ID #0x4 异常
。
但是我在正常debug情况下却没有这个问题

    STEPS TO REPRODUCE:
1. Create a dummy app that uses appcompat (so there are resources to be removed)
2. In build.grade set 'minifyEnabled true' and 'shrinkResource true' 
3. Create the APK where unused resources are removed

EXPECTED RESULTS:
Application should start normally.

OBSERVED RESULTS:
Application crashes with following stacktrace:
android.content.res.Resources$NotFoundException: File res/drawable-xxhdpi-v4/abc_list_pressed_holo_light.9.png from drawable resource ID #0x7f020020
    at android.content.res.Resources$CRunnable_openmp.doOpenMP(Resources.java:1111)
    at android.content.res.Resources$__ompClass0.__doWork(Resources.java:1043)
    at com.samsung.javaomp.runtime.__OMPThread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: res/drawable-xxhdpi-v4/abc_list_pressed_holo_light.9.png
    at android.content.res.AssetManager.openNonAssetNative(Native Method)
    at android.content.res.AssetManager.openNonAsset(AssetManager.java:408)
    at android.content.res.Resources$CRunnable_openmp.doOpenMP(Resources.java:1106)
    ... 2 more
java.io.FileNotFoundException: res/drawable-xxhdpi-v4/abc_list_pressed_holo_light.9.png
    at android.content.res.AssetManager.openNonAssetNative(Native Method)
    at android.content.res.AssetManager.openNonAsset(AssetManager.java:408)
    at android.content.res.Resources$CRunnable_openmp.doOpenMP(Resources.java:1106)
    at android.content.res.Resources$__ompClass0.__doWork(Resources.java:1043)
    at com.samsung.javaomp.runtime.__OMPThread.run(Unknown Source)

后来我反编译我的apk，找到资源文件夹发现，我需要的图片资源被移除了。我想到我在代码里开启了shrinkResources


         buildTypes {
        release {
            // 不显示Log
            buildConfigField "boolean", "LOG_DEBUG", "false"
            shrinkResources true
            minifyEnabled true
            zipAlignEnabled true
            // 移除无用的resource文件
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

            applicationVariants.all { variant ->
                variant.outputs.each { output ->
                    def outputFile = output.outputFile
                    if (outputFile != null && outputFile.name.endsWith('.apk')) {
                        // 输出apk名称为boohee_v1.0_2015-01-15_wandoujia.apk
                        def fileName = "${variant.productFlavors[0].name}${defaultConfig.versionName}.apk"
                        output.outputFile = new File(outputFile.parent, fileName)
                    }
                }
            }
        }