在“调试”模式下运行应用程序时，工作正常，但是在使用“发行版本”运行时，出现以下错误：
Fatal Exception: java.lang.NoClassDefFoundError: Failed resolution of: Laa$c;
at com.marvhong.videoeffect.helper.MagicFilterFactory.filterType2Name + 105(MagicFilterFactory.java:105)
at com.ui.audiovideoeditor.activity.TrimVideoActivity.initView + 265(TrimVideoActivity.java:265)
at com.ui.audiovideoeditor.base.TrimmerBaseActivity.onCreate + 78(TrimmerBaseActivity.java:78)
at android.app.Activity.performCreate + 7032(Activity.java:7032)
at android.app.Activity.performCreate + 7023(Activity.java:7023)
at android.app.Instrumentation.callActivityOnCreate + 1236(Instrumentation.java:1236)
at android.app.ActivityThread.performLaunchActivity + 2814(ActivityThread.java:2814)
at android.app.ActivityThread.handleLaunchActivity + 2943(ActivityThread.java:2943)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage + 1630(ActivityThread.java:1630)
at android.os.Handler.dispatchMessage + 106(Handler.java:106)
at android.os.Looper.loop + 164(Looper.java:164)
at android.app.ActivityThread.main + 6626(ActivityThread.java:6626)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 438(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main + 811(ZygoteInit.java:811)
Caused by java.lang.ClassNotFoundException: Didn't find class "aa$c" on path: DexPathList[[zip file "/data/app/com.socialmediavideoadsmaker-TZFvA-VXiNm9BBp_hNHgGw==/base.apk"],nativeLibraryDirectories=[/data/app/com.socialmediavideoadsmaker-TZFvA-VXiNm9BBp_hNHgGw==/lib/arm, /data/app/com.socialmediavideoadsmaker-TZFvA-VXiNm9BBp_hNHgGw==/base.apk!/lib/armeabi-v7a, /system/lib, /system/vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass + 125(BaseDexClassLoader.java:125)
at java.lang.ClassLoader.loadClass + 379(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass + 312(ClassLoader.java:312)
at com.marvhong.videoeffect.helper.MagicFilterFactory.filterType2Name + 105(MagicFilterFactory.java:105)
at com.ui.audiovideoeditor.activity.TrimVideoActivity.initView + 265(TrimVideoActivity.java:265)
at com.ui.audiovideoeditor.base.TrimmerBaseActivity.onCreate + 78(TrimmerBaseActivity.java:78)
at android.app.Activity.performCreate + 7032(Activity.java:7032)
at android.app.Activity.performCreate + 7023(Activity.java:7023)
at android.app.Instrumentation.callActivityOnCreate + 1236(Instrumentation.java:1236)
at android.app.ActivityThread.performLaunchActivity + 2814(ActivityThread.java:2814)
at android.app.ActivityThread.handleLaunchActivity + 2943(ActivityThread.java:2943)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage + 1630(ActivityThread.java:1630)
at android.os.Handler.dispatchMessage + 106(Handler.java:106)
at android.os.Looper.loop + 164(Looper.java:164)
at android.app.ActivityThread.main + 6626(ActivityThread.java:6626)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 438(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main + 811(ZygoteInit.java:811)
此异常来自Crshlytics。 我使用过的视频效果库，在此库中，以下是Release App中找不到的类：
public class MagicFilterFactory {
/**
* 视频滤镜效果
* @return
*/
public static GlFilter getFilter() {
MagicFilterType filterType = ConfigUtils.getInstance().getMagicFilterType();
return getFilter(filterType);
}
private static GlFilter getFilter(MagicFilterType filterType) {
switch (filterType) {
case NONE:
return new GlFilter();
case BILATERAL:
return new GlBilateralFilter();
case BOXBLUR:
return new GlBoxBlurFilter();
case BULGEDISTORTION:
return new GlBulgeDistortionFilter();
case CGACOLORSPACE:
return new GlCGAColorspaceFilter();
case GAUSSIANBLUR:
return new GlGaussianBlurFilter();
case GRAYSCALE:
return new GlGrayScaleFilter();
case HAZE:
return new GlHazeFilter(0.5f, 0.3f);
case INVERT:
return new GlInvertFilter();
case LUT:
return new GlVignetteFilter();
case MONOCHROME:
return new GlMonochromeFilter();
case SEPIA:
return new SepiaEffect();
case SHARPEN:
return new GlSharpenFilter(3.f);
case SPHEREREFRACTION:
return new GlSphereRefractionFilter();
case TONECURVE:
return new GlToneCurveFilter();
case VIGNETTE:
return new GlVignetteFilter(0.5f, 0.5f, 0.2f, 0.85f);
case BLACKANDWHITE:
return new BlackAndWhiteEffect();
case OVERLAY:
return new OverlayEffect();
case BARRELBLUR:
return new BarrelBlurEffect();
case POSTERIZE:
return new PosterizeEffect();
case CONTRAST:
return new ContrastEffect();
case GAMMA:
return new GammaEffect();
case CROSSPROCESS:
return new CrossProcessEffect();
case HUE:
return new HueEffect();
case TEMPERATURE:
return new TemperatureEffect();
case SKETCH:
return new SketchEffect();
default:
return new GlFilter();
}
}
public static int filterType2Name(MagicFilterType filterType) {
switch (filterType) {
case NONE:
return R.string.filter_none;
case INVERT:
return R.string.filter_invert;
case MONOCHROME:
return R.string.filter_monochrome;
case SEPIA:
return R.string.filter_sepia;
case GRAYSCALE:
return R.string.filter_grayscale;
case SHARPEN:
return R.string.filter_sharpen;
case SPHEREREFRACTION:
return R.string.filter_sphererefraction;
case BULGEDISTORTION:
return R.string.filter_bulgedistortion;
case CGACOLORSPACE:
return R.string.filter_cgacolorspace;
case HAZE:
return R.string.filter_haze;
case BILATERAL:
return R.string.filter_bilateral;
case TONECURVE:
return R.string.filter_tonecurve;
case VIGNETTE:
return R.string.filter_vignette;
case BLACKANDWHITE:
return R.string.filter_blackandwhite;
case OVERLAY:
return R.string.filter_overlay;
case BARRELBLUR:
return R.string.filter_barrelblur;
case POSTERIZE:
return R.string.filter_posterize;
case CONTRAST:
return R.string.filter_contrast;
case GAMMA:
return R.string.filter_gamma;
case CROSSPROCESS:
return R.string.filter_crossprocess;
case HUE:
return R.string.filter_hue;
case TEMPERATURE:
return R.string.filter_temperature;
case SKETCH:
return R.string.filter_sketch;
default:
return R.string.filter_none;
}
}
public static int filterType2Color(MagicFilterType filterType) {
switch (filterType) {
case NONE:
return R.color.filter_category_greenish_dummy;
default:
return R.color.filter_category_greenish_normal;
}
}
public static int filterType2Thumb(MagicFilterType filterType) {
switch (filterType) {
case NONE:
return R.drawable.filter;
case INVERT:
return R.drawable.filter_invert;
case SEPIA:
return R.drawable.filter_sepia;
case GRAYSCALE:
return R.drawable.filter_grayscale;
case CGACOLORSPACE:
return R.drawable.filter_cgacolorspace;
case BARRELBLUR:
return R.drawable.filter_barrelblur;
case BLACKANDWHITE:
return R.drawable.filter_blackandwhite;
case CONTRAST:
return R.drawable.filter_contrast;
case CROSSPROCESS:
return R.drawable.filter_crossprocess;
case GAMMA:
return R.drawable.filter_gamma;
case HUE:
return R.drawable.filter_hue;
case OVERLAY:
return R.drawable.filter_overlay;
case TEMPERATURE:
return R.drawable.filter_temperature;
default:
return R.drawable.filter;
}
}
}
有一个在发布时找不到的类。
此外，我已应用以下解决方案： 1）Android: java.lang.NoClassDefFoundError on the release APK 2）Android: NoClassDefFoundError only on release build
答案 0 :(得分：2)
minifyEnabled和shrinkResources在build.gradle文件中非常重要，如果您想减小特定构建类型（最好是“发布”类型）的生成apk的大小。
minifyEnabled通过删除未使用的代码和引用来收缩代码。
shrinkResources从/ res文件夹中删除代码中未引用的未使用资源文件。
您必须使用此代码
res = getResources().getIdentifier(filter_none, "string", getPackageName());
代替
R.string.filter_none
现在，如果您使用Resources.getIdentifier()方法动态引用资源，则由于未引用的资源已被删除，因此会发生意外行为。
为避免这种情况，在动态访问资源时，请按照本示例在Android User Guide中说明的那样使用此技巧
String name = String.format("img_%1d", angle + 1);
res = getResources().getIdentifier(name, "drawable", getPackageName());