一人開発でつまづいたときの処方箋

DroidKaigi 2020で発表予定だった資料です。残念ながら中止となってしまったので、ブログに発表内容を書き下ろしてあります。
https://androhi.hatenablog.com/entry/2020/07/10/122254

Transcript

1. Ұਓ։ൃͰͭ·͍ͮͨ
   ͱ͖ͷॲํᝦ
   %SPJE,BJHJԼ઒ܟ߂
   

   View Slide

2. ΞδΣϯμ
   w ࣗݾ঺հ
   w Ϗϧυ͕௨Βͳ͍ͱ͖ͷॲํͤΜ
   w ΞϓϦ͕Ϋϥογϡ͢Δͱ͖ͷॲํͤΜ
   w ΞϓϦͷධՁ্͕͕Βͳ͍ͱ͖ͷॲํͤΜ
   

   View Slide

3. ࣗݾ঺հ
   w ॴଐגࣜձࣾετϥΠϓσύʔτϝϯτ
   w "OESPJEΞϓϦ։ൃTNBSCZ
   w ۀ຿ҕୗ:QFSגࣜձࣾ
   w 3FBDU/BUJWFΞϓϦ։ൃ0,*11"
   w 5XJUUFS!BOESPIJ
   

   View Slide

4. ঱ঢ়̍
   Ϗϧυ͕௨Βͳ͍
   

   View Slide

5. JNQPSUΛਖ਼͘͠هड़͢Δ
   ༻๏ɿ"VUP*NQPSUઃఆ
   ༻ྔɿ"OESPJE4UVEJPΠϯετʔϧޙॳճ
   ࣗಈੜ੒ίʔυͷ࠶ੜ੒
   ༻๏ɿ1SPKFDUͷ$MFBOͱ#VJME
   ༻ྔɿϒϥϯνΛ੾Γସ͑ͨޙ
   ͍Ζ͍ΖͳΩϟογϡΛ࡟আ͢Δ
   ༻๏ɿΩϟογϡΫϦΞ
   ༻ྔɿݪҼෆ໌ͷϏϧυΤϥʔ͕ൃੜͨ࣌͠
   ॲɹํɹͤɹΜ
   

   View Slide

6. "VUP*NQPSUઃఆ
   

   View Slide

7. ݴޠ͝ͱʹ"VUP*NQPSUͷ
   ৼΔ෣͍ΛઃఆՄೳ
   

   View Slide

8. "EEVOBNCJHVPVTJNQPSUTPOUIFqZ
   ᶃ৽͍͠Ϋϥε౳Λೖྗͨ͠ࡍʹɺ࠷దͳJNQPSUจΛ௥Ճͯ͘͠ΕΔ
   ᶄJNQPSUର৅͕໌֬ͳ৔߹ͷΈɺࣗಈͰJNQPSUจΛૠೖ͢Δ
   

   View Slide

9. 0QUJNJ[FJNQPSUTPOUIFqZ
   ᶃϑΝΠϧ಺શମͷJNQPSUΛ࠷దԽͯ͘͠ΕΔ
   ᶄϑΝΠϧ಺ͷෆཁͳJNQPSUจ΍هड़ҐஔͳͲ΋ௐ੔ͯ͘͠ΕΔ
   ᶅखಈͰߦ͏ํ๏΋͋Δɻ$PEF0QUJNJ[F*NQPSUT $OU0QU0
   
   ˞ศརͳ൓໘ɺ๬·ͳ͍มߋ΋ൃੜ͢ΔՄೳੑ͕͋ΔͷͰɺࣗಈͱ
   खಈΛ͏·͘࢖͍෼͚Δඞཁ͕͋Γ·͢
   

   View Slide

10. IUUQTXXXKFUCSBJOTDPNIFMQJEFBDSFBUJOHBOEPQUJNJ[JOH
    JNQPSUTIUNM TFDUJPO8JOEPXT$SFBUJOH@BOE@0QUJNJ[JOH@*NQPSUTYNM
    *OUFMMJ+*%&"ͷ"VUP*NQPSUʹؔ͢Δϔϧϓ
    

    View Slide

11. 1SPKFDUͷ
    $MFBOͱ#VJME
    

    View Slide

12. /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    /xxxx/xxx.java: Τϥʔ: γϯϘϧ͕ݟ͚ͭΒΕ·ͤΜ
    

    View Slide

13. ࣗಈੜ੒͞ΕΔιʔείʔυ
    (MJEF΍%BHHFSͳͲͳͲʜʢ!(MJEF.PEVMF !$PNQPOFOU
    
    

    View Slide

14. ௨ৗCVJMEσΟϨΫτϦ͸(JU؅ཧԽʹ͸ஔ͔ͳ͍ͨΊɺϒϥϯνΛ੾Γସ͑ͯ࡞ۀ͠
    ͨ৔߹ʹɺࣗಈੜ੒͞Εͨιʔείʔυͷ಺༰͕Ϛον͠ͳ͍έʔε͕ى͜Δɻ
    ͳͥʁ
    …
    local.properties
    *.keystore
    *.DS_Store
    *.aab
    proguard-project.txt
    captures/**
    **/.gradle
    **/.settings
    **/build
    .gradle
    …
    HJUJHOPSF
    

    View Slide

15. w $MFBO1SPKFDU#VJMEશͯͷதؒϏϧυϑΝΠϧͱΩϟογϡϏϧυϑΝΠϧΛ࡟আ͢Δ
    w 3FCVJME1SPKFDU$MFBO1SPKFDUͨ͠ޙɺ"1,Λੜ੒͢Δ
    ղܾํ๏
    

    View Slide

16. ΩϟογϡΫϦΞ
    DMFBO#VJME$BDIF
    

    View Slide

17. ls -l ~/.android/build-cache/
    total 0
    drwxr-xr-x 4 shimokawa staff 128 2 11 12:57 3.5.1
    -rw-r--r-- 1 shimokawa staff 0 2 11 12:57 3.5.1.lock
    "OESPJE(SBEMF1MVHJO͕ੜ੒͢ΔϏϧυΩϟογϡ
    ˞ࠓ͸"OESPJEQMVHJOͷόʔδϣϯ͝ͱʹσΟϨΫτϦΛ࡞ΔͬΆ͍
    

    View Slide

18. શͯͷϏϧυΩϟογϡΛ࡟আ͢Δ
    ./gradlew cleanBuildCache
    ls -l
    total 0
    -rw-r--r-- 1 shimokawa staff 0 2 11 12:57 3.5.1.lock
    ˞IUUQTEFWFMPQFSBOESPJEDPNTUVEJPCVJMECVJMEDBDIF IMKB
    

    View Slide

19. ΩϟογϡΫϦΞ
    *OWBMJEBUFDBDIFBOESFTUBSU
    

    View Slide

20. ϏϧυΩϟογϡͷ࡟আͰ΋ղܾग़དྷͳ͍৔߹ͷɺ࠷ऴखஈͱͯ͠ࢼ͢΂͖ΞΫγϣϯ
    ͳͥ࠷ऴखஈͳͷ͔ʁ
    શͯͷϩʔΧϧΩϟογϡΛ࡟আͯ͠͠·͏ͨΊɺ
    ࣍ʹϓϩδΣΫτΛ։͍ͨͱ͖΍ॳճϏϧυʹ͕͔͔࣌ؒΔ
    શͯͷϩʔΧϧώετϦʔ͕࡟আ͞Ειʔείʔυͷมߋཤྺ͕ࣦΘΕͯ͠͏ͨΊɺ
    ಛఆͷঢ়ଶʹϩʔϧόοΫग़དྷͳ͘ͳͬͯ͠·͏
    *OWBMJEBUFDBDIFBOESFTUBSUͱ͸ʁ
    

    View Slide

21. *OUFMMJ+*%&"ͷΩϟογϡΫϦΞʹؔ͢Δϔϧϓ
    IUUQTXXXKFUCSBJOTDPNIFMQJEFBXPSLJOHXJUI
    QSPKFDUTIUNMJOWBMJEBUFDBDIF
    ˞ϏϧυΩϟογϡͱ͔Ͱ͸ແ͍ɺ༷ʑͳϩʔΧϧΩϟογϡΛ࡟আ͍ͯ͠ΔΒ͍͠
    

    View Slide

22. ঱ঢ়̎
    ΞϓϦ͕Ϋϥογϡ͢Δ
    

    View Slide

23. ݪҼΛ୳Δ
    ༻๏ɿ4UBDL5SBDFΛ෼ղͯ͠ಡΈղ͘
    ༻ྔɿΫϥογϡ͕खݩͰ࠶ݱग़དྷΔͱ͖
    ղܾͷώϯτΛूΊΔ
    ༻๏ɿྨࣅέʔεͷ*TTVFΛ୳͢
    ༻ྔɿࣗྗͰղܾग़དྷΔ໨ॲཱ͕ͨͳ͍ͱ͖
    ॲɹํɹͤɹΜ
    

    View Slide

24. 4UBDL5SBDFΛ෼ղͯ͠ಡΈղ͘
    

    View Slide

25. 2020-02-11 14:16:24.399 16984-16984/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 16984
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.smarby.debug/
    jp.smarby.activities.landing.RegisterActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int
    java.lang.String.length()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a
    null object reference
    at jp.smarby.activities.landing.RegisterActivity.onCreate(RegisterActivity.java:105)
    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.performLaunchActivity(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    OVMMΛࢀরͯ͠Ϋϥογϡ͍ͯ͠Δ৔߹ͷ4UBDL5SBDF
    

    View Slide

26. 2020-02-11 14:16:24.399 16984-16984/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 16984
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.smarby.debug/
    jp.smarby.activities.landing.RegisterActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int
    java.lang.String.length()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a
    null object reference
    at jp.smarby.activities.landing.RegisterActivity.onCreate(RegisterActivity.java:105)
    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.performLaunchActivity(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    OVMMΛࢀরͯ͠Ϋϥογϡ͍ͯ͠Δ৔߹ͷ4UBDL5SBDF
    

    View Slide

27. 2020-02-11 14:16:24.399 16984-16984/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 16984
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.smarby.debug/
    jp.smarby.activities.landing.RegisterActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int
    java.lang.String.length()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a
    null object reference
    at jp.smarby.activities.landing.RegisterActivity.onCreate(RegisterActivity.java:105)
    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.performLaunchActivity(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    OVMMΛࢀরͯ͠Ϋϥογϡ͍ͯ͠Δ৔߹ͷ4UBDL5SBDF
    

    View Slide

28. 2020-02-11 14:16:24.399 16984-16984/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 16984
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.smarby.debug/
    jp.smarby.activities.landing.RegisterActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int
    java.lang.String.length()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a
    null object reference
    at jp.smarby.activities.landing.RegisterActivity.onCreate(RegisterActivity.java:105)
    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.performLaunchActivity(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    OVMMΛࢀরͯ͠Ϋϥογϡ͍ͯ͠Δ৔߹ͷ4UBDL5SBDF
    

    View Slide

29. 2020-02-11 14:16:24.399 16984-16984/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 16984
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.smarby.debug/
    jp.smarby.activities.landing.RegisterActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int
    java.lang.String.length()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a
    null object reference
    at jp.smarby.activities.landing.RegisterActivity.onCreate(RegisterActivity.java:105)
    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.performLaunchActivity(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    OVMMΛࢀরͯ͠Ϋϥογϡ͍ͯ͠Δ৔߹ͷ4UBDL5SBDF
    

    View Slide

30. 2020-02-11 14:16:24.399 16984-16984/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 16984
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.smarby.debug/
    jp.smarby.activities.landing.RegisterActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int
    java.lang.String.length()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a
    null object reference
    at jp.smarby.activities.landing.RegisterActivity.onCreate(RegisterActivity.java:105)
    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.performLaunchActivity(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    OVMMΛࢀরͯ͠Ϋϥογϡ͍ͯ͠Δ৔߹ͷ4UBDL5SBDF
    

    View Slide

31. 2020-02-11 14:16:24.399 16984-16984/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 16984
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.smarby.debug/
    jp.smarby.activities.landing.RegisterActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int
    java.lang.String.length()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a
    null object reference
    at jp.smarby.activities.landing.RegisterActivity.onCreate(RegisterActivity.java:105)
    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.performLaunchActivity(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    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$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    OVMMΛࢀরͯ͠Ϋϥογϡ͍ͯ͠Δ৔߹ͷ4UBDL5SBDF
    3FHJTUFS"DUJWJUZKBWBͷߦ໨Ͱ
    4USJOHΫϥεͷMFOHUIϝιουΛݺΜͰ͍ΔίʔυͰ
    Ϋϥογϡ͍ͯ͠Δ
    

    View Slide

32. 2020-02-11 14:38:56.248 18143-18143/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 18143
    android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@1a76d12 is not
    valid; is your activity running?
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:798)
    at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93)
    at android.app.Dialog.show(Dialog.java:329)
    at androidx.appcompat.app.AlertDialog$Builder.show(AlertDialog.java:1009)
    at jp.smarby.activities.landing.RegisterActivity$3.run(RegisterActivity.java:300)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    ࢖༻͍ͯ͠Δ$POUFYU͕ద੾Ͱͳ͔ͬͨ৔߹ͷ4UBDL5SBDF
    

    View Slide

33. 2020-02-11 14:38:56.248 18143-18143/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 18143
    android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@1a76d12 is not
    valid; is your activity running?
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:798)
    at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93)
    at android.app.Dialog.show(Dialog.java:329)
    at androidx.appcompat.app.AlertDialog$Builder.show(AlertDialog.java:1009)
    at jp.smarby.activities.landing.RegisterActivity$3.run(RegisterActivity.java:300)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    ࢖༻͍ͯ͠Δ$POUFYU͕ద੾Ͱͳ͔ͬͨ৔߹ͷ4UBDL5SBDF
    

    View Slide

34. 2020-02-11 14:38:56.248 18143-18143/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 18143
    android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@1a76d12 is not
    valid; is your activity running?
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:798)
    at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93)
    at android.app.Dialog.show(Dialog.java:329)
    at androidx.appcompat.app.AlertDialog$Builder.show(AlertDialog.java:1009)
    at jp.smarby.activities.landing.RegisterActivity$3.run(RegisterActivity.java:300)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    ࢖༻͍ͯ͠Δ$POUFYU͕ద੾Ͱͳ͔ͬͨ৔߹ͷ4UBDL5SBDF
    

    View Slide

35. 2020-02-11 14:38:56.248 18143-18143/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 18143
    android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@1a76d12 is not
    valid; is your activity running?
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:798)
    at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93)
    at android.app.Dialog.show(Dialog.java:329)
    at androidx.appcompat.app.AlertDialog$Builder.show(AlertDialog.java:1009)
    at jp.smarby.activities.landing.RegisterActivity$3.run(RegisterActivity.java:300)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    ࢖༻͍ͯ͠Δ$POUFYU͕ద੾Ͱͳ͔ͬͨ৔߹ͷ4UBDL5SBDF
    

    View Slide

36. 2020-02-11 14:38:56.248 18143-18143/jp.smarby.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: jp.smarby.debug, PID: 18143
    android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@1a76d12 is not
    valid; is your activity running?
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:798)
    at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93)
    at android.app.Dialog.show(Dialog.java:329)
    at androidx.appcompat.app.AlertDialog$Builder.show(AlertDialog.java:1009)
    at jp.smarby.activities.landing.RegisterActivity$3.run(RegisterActivity.java:300)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    ࢖༻͍ͯ͠Δ$POUFYU͕ద੾Ͱͳ͔ͬͨ৔߹ͷ4UBDL5SBDF
    3FHJTUFS"DUJWJUZKBWBͷߦ໨Ͱ
    "MFSU%JBMPH͕දࣔग़དྷͳ͔ͬͨʁͨΊ
    Ϋϥογϡ͍ͯ͠Δ
    

    View Slide

37. Ͳ͏मਖ਼͢Ε͹Α͍ͷ͔ʁ
    

    View Slide

38. Ϋϥογϡ͕࠶ݱग़དྷΔͷͳΒʜ
    w "OESPJE#BE5PLFO&YDFQUJPO"MFSU%JBMPHTIPXͳ
    ͲͷΩʔϫʔυͰݕࡧ͢Δ
    w ໰୊ͷίʔυΛݺͿλΠϛϯάΛม͑ͨΓɺ౉͢ύϥϝʔ
    λʔΛม͑ͨΓͯ͠ɺ࠶ݱ͢Δ৔߹ͱ࠶ݱ͠ͳ͍৔߹ͷ͠
    ͖͍஋Λ୳͢
    w ࣮ػΤϛϡϨʔλʔ04όʔδϣϯͳͲΛม͑ͯࢼͯ͠
    ΈΔ
    

    View Slide

39. ྨࣅέʔεͷ*TTVFΛ୳͢
    

    View Slide

40. ओཁͳ୳ࡧઌ
    w"OESPJE*TTVF5SBDLFS
    wSEQBSUZ-JCSBSZͷ(JU)VC
    

    View Slide

41. "OESPJE*TTVF5SBDLFS
    w "041ʢ"OESPJE0QFO4PVSDF1SPKFDUʣͷαΠτʹৄ͠
    ͘આ໌͕͋Γ·͢
    w IUUQTTPVSDFBOESPJEDPNTFUVQDPOUSJCVUF
    SFQPSUCVHT
    w ஫ҙ఺ͱͯ͠ίϯϙʔωϯτͱ͍͏୯ҐͰόάใࠂઌ͕ผ
    Ε͍ͯ·͢
    w IUUQTTPVSDFBOESPJEDPNTFUVQDPOUSJCVUF
    SFQPSUCVHTCVHRVFVFT
    

    View Slide

42. SE1BSUZ-JCSBSZͷ(JU)VC
    w 3FUSPpU΍(MJEFͳͲଟ͘ͷαʔυύʔςΟ੡ϥΠϒϥϦ
    ͸ɺιʔείʔυͱڞʹόάใࠂͱରԠ΋ެ։͞Ε͍ͯ·
    ͢
    w IUUQTHJUIVCDPNTRVBSFSFUSPpUJTTVFT
    w IUUQTHJUIVCDPNCVNQUFDIHMJEFJTTVFT
    

    View Slide

43. 4UBDL5SBDFͱ޲͖߹ͬͯ
    ෆ۩߹मਖ਼ͷצॴΛ஁͑Δ
    

    View Slide

44. ঱ঢ়̏
    ΞϓϦͷධՁ্͕͕Βͳ͍
    

    View Slide

45. 1MBZ$POTPMFͰΞϓϦͷ՝୊Λ୳͢
    ༻๏ɿ"OESPJE7JUBMTͰΞϓϦͷΫΦϦςΟΛνΣοΫ
    ༻ྔɿΞϓϦΛϦϦʔεͨ͠ޙͳͲ༨ྗ͕͋Δͱ͖
    1MBZ$POTPMFͰڝ߹ΞϓϦͷධՁΛݟΔ
    ༻๏ɿϢʔβʔͷ೔ৗͷମݧΛνΣοΫ
    ༻ྔɿΞϓϦΛϦϦʔεͨ͠ޙͳͲ༨ྗ͕͋Δͱ͖
    ॲɹํɹͤɹΜ
    

    View Slide

46. "OESPJE7JUBMTͰ
    ΞϓϦͷΫΦϦςΟΛνΣοΫ
    

    View Slide

47. "OESPJE7JUBMTͱ͸ʁ
    

    View Slide

48. "OESPJE7JUBMT
    ɾΞϓϦͷٕज़తύϑΥʔϚϯεͷϞχλϦϯά
    ɾσόΠεͷ࢖༻ঢ়گσʔλ΍਍அ৘ใʹ͍ͭͯɺࣗಈ
    ڞ༗Λ༗ޮʹઃఆͨ͠Ϣʔβʔ͔Βऩू͞ΕͨσʔλͰ
    ࢉग़͍ͯ͠Δɻ
    

    View Slide

49. ϞχλϦϯάՄೳͳσʔλ
    ి஑࢖༻ྔ
    ա౓ͷXBLFVQʗ8J'JεΩϟϯʗωοτϫʔΫ࢖༻ྔ
    ҆ఆੑ
    "/3ൃੜ཰ʗΫϥογϡൃੜ཰
    දࣔʹཁ͢Δ࣌ؒ
    ஗͍ϨϯμϦϯάʗϑϦʔζͨ͠6*ϑϨʔϜ
    ΞϓϦͷελʔτΞοϓ࣌ؒ
    ίʔϧυʗ΢ΥʔϜʗϗοτελʔτΞοϓ࣌ؒ
    ݖݶ
    ݖݶϦΫΤετͷڋ൱
    

    View Slide

50. ࣗ෼ͷΞϓϦ͕ͲͷϨϕϧͷΫΦϦςΟͳͷ͔
    ૬ରతʹνΣοΫग़དྷΔ
    

    View Slide

51. Ϣʔβʔͷ೔ৗͷମݧΛνΣοΫ
    

    View Slide

52. ྨࣅΞϓϦͷάϧʔϓͱࣗ෼ͷΞϓϦΛൺֱ͢Δ
    ᶃ "OESPJE7JUBMT΍ϢʔβʔධՁΛɺબ୒ͨ͠ΞϓϦͷάϧʔϓͱൺֱग़དྷΔػೳ
    ᶄ 7JUBMT༻ͱධՁ༻ͱͭͷάϧʔϓΛ࡞੒ग़དྷΔ
    ᶅ 7JUBMT༻͸ΦϓτΞ΢τ͢Δ͜ͱͰ7JUBMTΛଞͷΞϓϦͱൺֱͨ͠Γɺଞͷσϕϩο
    ύʔ͕ྨࣅΞϓϦͱͯ͠બ୒ग़དྷͳ͍Α͏ʹ͢Δ͜ͱ͕ग़དྷΔ
    

    View Slide

53. 7JUBMTͷάϧʔϓฤू
    ධՁͷάϧʔϓฤू
    

    View Slide

54. ॳظઃఆͰ͸ಉ͡ΧςΰϦͷ
    ͓͢͢ΊΞϓϦ͕άϧʔϓԽ͞Ε͍ͯΔ
    άϧʔϓʹ͸ࣗ༝ʹଞࣾΞϓϦΛ
    ௥Ճʗ࡟আ͢Δ͜ͱ͕ग़དྷΔ
    ˞ͨͩ͠ɺ͜ΕΛ׆༻ͨ͠ධՁϕϯνϚʔΫ
    ػೳ͸ݱࡏ͸ӳޠϨϏϡʔͷΈͱͳ͍ͬͯΔ
    

    View Slide

55. ϨϏϡʔʹॻ͔Εͨ಺༰͔ΒΩʔϫʔυΛ
    ϐοΫΞοϓͯ͠ɺͲͷΑ͏ʹධՁ΁Өڹ͠
    ͍ͯΔ͔Λ஌Δ͜ͱ͕ग़དྷΔɻ
    ·ͨϦϯΫΛΫϦοΫ͢Ε͹ɺΩʔϫʔυΛ
    ؚΉϨϏϡʔҰཡΛදࣔͯ͘͠ΕΔ
    શͯͷϨϏϡʔΛνΣοΫ͢Δͷ͸େมͳͷ
    ͰɺϨϏϡʔղੳػೳΛ࢖ͬͯޮ཰తʹϢʔ
    βʔͷ੠ΛΩϟον͢Δ
    

    View Slide

56. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

    View Slide