使用产品：iMobile 11i 操作系统：win10 x64 2022-10-11 16:06:57.581 32044-32044/com.example.myapplication E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.myapplication, PID: 32044 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.FileOutputStream.close()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3680) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3835) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2291) at android.os.Handler.dispatchMessage(Handler.java:107) at android.os.Looper.loop(Looper.java:230) at android.app.ActivityThread.main(ActivityThread.java:8024) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:526) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1034) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.FileOutputStream.close()' on a null object reference at com.supermap.data.Environment.writeFile(Environment.java:2320) at com.supermap.data.Environment.checkDevice_New(Environment.java:836) at com.supermap.data.Environment.initialization(Environment.java:626) at com.example.myapplication.MainActivity.onCreate(MainActivity.java:28) at android.app.Activity.performCreate(Activity.java:7894) at android.app.Activity.performCreate(Activity.java:7883) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1353) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3655) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3835) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2291) at android.os.Handler.dispatchMessage(Handler.java:107) at android.os.Looper.loop(Looper.java:230) at android.app.ActivityThread.main(ActivityThread.java:8024) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:526) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1034)
