看到11楼
我+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
我第一测试机没有插入外置储存卡报了这个错
我第二个测试机插入了外置储存卡
就正常了
FATAL EXCEPTION: main
Process: a114.yangming.filemanagoperate, PID: 9676
java.lang.RuntimeException: Unable to start activity ComponentInfo{a114.yangming.filemanagoperate/a114.yangming.filemanagoperate.MainActivity}: java.lang.ArrayIndexOutOfBoundsException: length=2; index=3
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2471)
at android.app.ActivityThread.access$800(ActivityThread.java:163)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:141)
at android.app.ActivityThread.main(ActivityThread.java:5451)
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:910)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:705)
Caused by: java.lang.ArrayIndexOutOfBoundsException: length=2; index=3
at a114.yangming.filemanagoperate.MainActivity.operateWeight(MainActivity.java:75)
at a114.yangming.filemanagoperate.MainActivity.onCreate(MainActivity.java:21)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2362)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2471)
at android.app.ActivityThread.access$800(ActivityThread.java:163)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:141)
at android.app.ActivityThread.main(ActivityThread.java:5451)
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:910)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:705)