Android APP打包后程序运行报错,求大神,/AndroidRuntime: FATAL EXCEPTION: main。
2022-06-21 16:33:39.826 8277-8277/com.sqsxiu.sampling_record E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.sqsxiu.sampling_record, PID: 8277
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sqsxiu.sampling_record/com.sqsxiu.sampling_record.activity.RaskListDetailsActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2944)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3079)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1836)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6702)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)
Caused by: java.lang.NullPointerException
at java.io.Writer.<init>(Writer.java:88)
at java.io.OutputStreamWriter.<init>(OutputStreamWriter.java:97)
at com.example.print_sdk.PrintUtil.<init>(PrintUtil.java:56)
at com.sqsxiu.sampling_record.activity.RaskListDetailsActivity.initPos(RaskListDetailsActivity.java:444)
at com.sqsxiu.sampling_record.activity.RaskListDetailsActivity.onCreate(RaskListDetailsActivity.java:226)
at android.app.Activity.performCreate(Activity.java:7136)
at android.app.Activity.performCreate(Activity.java:7127)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread