一：問題

今天在 OPPO R15 上調(diào)試代碼，安裝后發(fā)現(xiàn)無法啟動。報錯如下

8/com.banger.xxxxx E/AndroidRuntime: FATAL EXCEPTION: main
                                                                  Process: com.banger.xxxxxx, PID: 9358
                                                                  java.lang.RuntimeException: Unable to instantiate application com.banger.xxxxx.ui.BaseApplication: java.lang.ClassNotFoundException: Didn't find class "com.banger.xxxx.ui.BaseApplication" on path: DexPathList[[zip file "/data/app/com.banger.xxxx-YINxedP-pIswZbzon0qenQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.banger.xiaowei-YINxedP-pIswZbzon0qenQ==/lib/arm64, /system/fake-libs64, /data/app/com.banger.xxxxx-YINxedP-pIswZbzon0qenQ==/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64]]
                                                                      at android.app.LoadedApk.makeApplication(LoadedApk.java:1053)
                                                                      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6138)
                                                                      at android.app.ActivityThread.-wrap1(Unknown Source:0)
                                                                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1861)
                                                                      at android.os.Handler.dispatchMessage(Handler.java:106)
                                                                      at android.os.Looper.loop(Looper.java:183)
                                                                      at android.app.ActivityThread.main(ActivityThread.java:7014)
                                                                      at java.lang.reflect.Method.invoke(Native Method)
                                                                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:514)
                                                                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:888)
                                                                   Caused by: java.lang.ClassNotFoundException: Didn't find class "com.banger.xiaowei.ui.BaseApplication" on path: DexPathList[[zip file "/data/app/com.banger.xxxxx-YINxedP-pIswZbzon0qenQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.banger.xiaowei-YINxedP-pIswZbzon0qenQ==/lib/arm64, /system/fake-libs64, /data/app/com.banger.xxxxxx-YINxedP-pIswZbzon0qenQ==/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64]]
                                                                      at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
                                                                      at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
                                                                      at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
                                                                      at android.app.Instrumentation.newApplication(Instrumentation.java:1087)
                                                                      at android.app.LoadedApk.makeApplication(LoadedApk.java:1047)
                                                                      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6138) 
                                                                      at android.app.ActivityThread.-wrap1(Unknown Source:0) 
                                                                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1861) 
                                                                      at android.os.Handler.dispatchMessage(Handler.java:106) 
                                                                      at android.os.Looper.loop(Looper.java:183) 
                                                                      at android.app.ActivityThread.main(ActivityThread.java:7014) 
                                                                      at java.lang.reflect.Method.invoke(Native Method) 
                                                                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:514) 
                                                                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:888) 

報錯的重點在 這里Caused by: java.lang.ClassNotFoundException: Didn't find class "com.banger.xiaowei.ui.BaseApplication" 就是找不到類。

二：解決問題

這是Android studio 的 instant run給我們留下的坑。需要在Android studio 中設置下

• Perferences

  
  
  image
• Build,Execution, Deployment
• instant run

• Enable instant run to hot swap code/resouce changes on deploy(default enabled) ，默認這個是勾選的，關閉這個功能，即可正常運行調(diào)試 app 。

  
  
  image