我在android studio的早期版本中创建了一个项目，我改变了我的笔记本电脑的“os”！我丢失了包括android studio在内的一切，但我再次下载并将项目导入新版本。 当我运行项目时，它显示此错误
06-27 17:08:45.010 7440-7440/com.example.vinay.finsert W/ContextImpl: Unable to create files subdir /data/data/com.example.vinay.finsert/cache
06-27 17:08:45.010 7440-7440/com.example.vinay.finsert E/ActivityThread: Unable to setupGraphicsSupport due to missing cache directory
06-27 17:08:45.031 7440-7440/com.example.vinay.finsert W/ContextImpl: Unable to create files subdir /data/data/com.example.vinay.finsert/cache
06-27 17:08:45.035 7440-7440/com.example.vinay.finsert D/AndroidRuntime: Shutting down VM
06-27 17:08:45.046 7440-7440/com.example.vinay.finsert E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.vinay.finsert, PID: 7440
java.lang.RuntimeException: Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.io.File.getPath()' on a null object reference
at android.app.LoadedApk.makeApplication(LoadedApk.java:564)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4566)
at android.app.ActivityThread.access$1600(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5294)
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:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.io.File.getPath()' on a null object reference
at com.android.tools.fd.runtime.BootstrapApplication.attachBaseContext(BootstrapApplication.java:235)
at android.app.Application.attach(Application.java:181)
at android.app.Instrumentation.newApplication(Instrumentation.java:996)
at android.app.Instrumentation.newApplication(Instrumentation.java:980)
at android.app.LoadedApk.makeApplication(LoadedApk.java:559)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4566)
at android.app.ActivityThread.access$1600(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5294)
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:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)