Square Fragmentやめるってよ

『【翻訳】Android Fragmentへの反対声明』の解説
http://ninjinkun.hatenablog.com/entry/2014/10/16/234611

Transcript

1. 4RVBSF
   
 'SBHNFOU΍ΊΔͬͯΑ OJOKJOLVO
2. ʲ຋༁ʳ"OESPJE
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   w 4RVBSF͕'SBHNFOUΛ΍Ίͨ࿩
   w ษڧ͕ͯΒ຋༁ͨ͠ͷͰɺղઆ͠·͢
   w !IPUDIFNJ͞Μʹ຋༁νΣοΫͯ͠௖͖·ͨ͠
   IUUQOJOKJOLVOIBUFOBCMPHDPNFOUSZ
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   w σόοά͕೉͍͠
   w 7JFXͱϏδωεϩδοΫͷ෼཭͕ͮ͠Β͍
   w ࠶ੜ੒͕ࠇຐज़
4. ϥΠϑαΠΫϧ͕ෳࡶ w "DUJWJUZ͔Βड͚ܧ͍ͩϥΠϑαΠΫϧ
   w "DUJWJUZͱ࿈ܞ͢ΔҝͷϥΠϑαΠΫϧ
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5. σόοάͷ೉͠͞ w ελοΫΛ௥͍ͬͯ͘ͱ'SBHNFOU.BOBHFS*NQM ʹͿ͔ͭͬͯࢮ͵
   
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   w ϏδωεϩδοΫͱ྆ํࠞࡏͯ͠͠·͏
7. 'SBHNFOU
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   w ͙͢ʹ݁ՌΛ࢖͍͍ͨͳΒ FYFDVUF1FOEJOH5SBOTBDUJPOT
8. 'SBHNFOUΛੜ੒͢Δຐ๏ w 'SBHNFOU͸ϦϑϨΫγϣϯΛ࢖ͬͯ࠶ੜ੒͞ΕΔ
   w ಗ໊ΫϥεͰ'SBHNFOUΛ࡞Δͱɺ0VUFS
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   w +BWBͷϥΠϑαΠΫϧͱ'SBHNFOUͷϥΠϑαΠΫ ϧ͕ϛεϚον DialogFragment dialogFragment = new DialogFragment() { @Override public Dialog onCreateDialog(Bundle savedInstanceState) { ... } }; dialogFragment.show(fragmentManager, tag);
9. ʢิ଍ʣ'SBHNFOUΛੜ੒͢Δຐ๏ w -JTUFOFS΋อ࣋Ͱ͖ͳ͍
   w ਌ͱ௨৴͠Α͏ͱࢥͬͨΒɺ਌ʹ-JTUFOFSΛ࣮૷͢ Δඞཁ͕͋Δ
   w 'SBHNFOU
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   ʹίʔϧόοΫ͢Δํ๏ IUUQZBO[NCMPHTQPUKQGSBHNFOUBDUJWJUZIUNM
10. public class MainFragment extends Fragment { public interface OnOkBtnClickListener { public void onOkClicked(); } private OnOkBtnClickListener mListener; public void setOnOkBtnClickListener(OnOkBtnClickListener l) { mListener = l; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Button okBtn = new Button(inflater.getContext()); okBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(mListener != null) { mListener.onOkClicked(); } } }); return okBtn; } } ࠶ੜ੒࣌ʹ-JTUFOFS͕ফ͑Δ IUUQZBO[NCMPHTQPUKQGSBHNFOUBDUJWJUZIUNM
11. public class MainFragment2 extends Fragment { public interface OnOkBtnClickListener { public void onOkClicked(); } private OnOkBtnClickListener mListener; @Override public void onAttach(Activity activity) { super.onAttach(activity); if (activity instanceof OnOkBtnClickListener == false) { throw new ClassCastException("activity ͕ OnOkBtnClickListener Λ࣮૷͍ͯ͠·ͤΜ."); } mListener = ((OnOkBtnClickListener) activity); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Button okBtn = new Button(inflater.getContext()); okBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mListener != null) { mListener.onOkClicked(); } } }); return okBtn; } }
12. 'SBHNFOU͔ΒֶΜͩ͜ͱ w ୯Ұͷ"DUJWJUZ
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    w ΞχϝʔγϣϯͱϥΠϑαΠΫϧ͕؆୯ʹͳΔ
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    w "DUJWJUZͷதʹ΋࣮૷Ͱ͖Δ
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    w 7JFXͱͯ͠ͷ໾ׂ όοΫૢ࡞ͷ؅ཧ
16. public class DualPaneContainer extends LinearLayout implements Container { private MyDetailView detailView; ! public DualPaneContainer(Context context, AttributeSet attrs) { super(context, attrs); } ! @Override protected void onFinishInflate() { super.onFinishInflate(); detailView = (MyDetailView) getChildAt(1); } ! public boolean onBackPressed() { return false; } ! @Override public void showItem(String item) { detailView.setItem(item); } }
17. public class MainActivity extends Activity { private Container container; ! @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); container = (Container) findViewById(R.id.container); } ! public Container getContainer() { return container; } ! @Override public void onBackPressed() { boolean handled = container.onBackPressed(); if (!handled) { finish(); } } }
18. 7JFXͱ1SFTFOUFS w ϏδωεϩδοΫͱ$POUSPMMFSͷ෼཭
    w 1SFTFOUFS
    w .PEFMΛૢ࡞͢Δ
    w 7JFXΛૢ࡞͢Δ
19. ʢิ଍ʣ.71ύλʔϯ w .7$ͱͷҧ͍
    w $POUSPMMFS͕ϢʔβʔೖྗΛड͚ͱΒͳ͍
    w ड͚ͱΔͷ͸7JFX
20. public class MyDetailView extends LinearLayout { TextView textView; DetailPresenter presenter; ! public MyDetailView(Context context, AttributeSet attrs) { super(context, attrs); presenter = new DetailPresenter(); } ! @Override protected void onFinishInflate() { super.onFinishInflate(); presenter.setView(this); textView = (TextView) findViewById(R.id.text); findViewById(R.id.button).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { presenter.buttonClicked(); } }); } ! public void setItem(String item) { textView.setText(item); } }
21. class EditDiscountPresenter { // ... public void saveDiscount() { EditDiscountView view = getView(); String name = view.getName(); if (isBlank(name)) { view.showNameRequiredWarning(); return; } if (isNewDiscount()) { createNewDiscountAsync(name, view.getAmount(), view.isPercentage()); } else { updateNewDiscountAsync(discountId, name, view.getAmount(), view.isPercentage()); } close(); } }
22. OJOKJOLVOࢲݟ w "DUJWJUZͷܽؕʢͱ͍͏͔χʔζʹ߹͍ͬͯͳ͔ͬ ͨͱ͜Ζʣ
    w "DUJWJUZؒͷૄ݁߹ઃܭ
    w ը໘લఏ
23. OJOKJOLVOࢲݟ w "DUJWJUZͷܽ఺Λิ׬͢ΔͨΊͷ'SBHNFOU
    w "DUJWJUZͱͷ੔߹ੑΛऔΖ͏ͱ͗ͯ͢͠ઃܭ͕ෳ ࡶʹͳͬͯ͠·͍ͬͯΔ
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    w ͳͷͰࢀߟʹͳΔ͜ͱ΋͋Δ͔΋
25. OJOKJOLVOࢲݟ w ฐࣾͰ͸'SBHNFOU͸ࣺͯͳ͍
    w ಠࣗͰੈք؍Λ࡞Δ༨༟͸ͳ͍
    w ͔͠͠'SBHNFOUͷਏ͞͸ೝ͓ࣝͯ͘͠΂͖ͩͱࢥ ͏
26. ձ৔σΟεΧογϣϯ w #BDLTUBDLʹ٧Έ͍ͨͱ͖͚ͩ'SBHNFOUΛ࢖͏ύ λʔϯΛࢼ͍ͯ͠Δํ͕͍Βͬ͠Όͬͨ
    w $VTUPN
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    w 'SBHNFOUʹԿͰ΋ॻ͘ͷ͸ԿʹͤΑΞϯνύλʔ ϯ
    w 1SFTFOUFS͸'SBHNFOUΛ࢖͍ͬͯͯ΋༗༻ͦ͏
27. ձ৔σΟεΧογϣϯ w Ͱ͖Δ͚ͩ"DUJWJUZ͚ͩͰ࡞Δ೿ͷํ΋
    w "DUJWJUZʹ͍ͭͯ͸͋·Γ΢έ͕ྑ͘ͳ͔ͬͨ
28. ձ৔σΟεΧογϣϯ w 'SBHNFOUͷਏ͞ʹ͍ͭͯ͸݁ߏίϯηϯαε͕औ Εͨͱࢥ͏
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