Slide 1
Slide 1 text
Advanced Data Binding
kyobashi.dex #3
@kgmyshin
Slide 2
Slide 2 text
࣍
• ํBinding
• ϝιουϦϑΝϨϯε
• ϥϜμࣜ
Slide 3
Slide 3 text
هࣄ͋Γ·͢
https://tech.recruit-mp.co.jp/event/post-10069/
Slide 4
Slide 4 text
هࣄ͋Γ·͕͢
• هࣄGoogle IO 2016ͷʮAdvanced Data
BindingʯͷηογϣϯΛฉ͍ͨ··จࣈى͜
ͨ͠͠ͷ
• ͜ͷLTͰηογϣϯΛฉ͍ͨޙʹࣗͰࢼ
ͨ͠ײ৮ੜ͞ΕΔϑΝΠϧͳͲ͔Βݟ͑
ͨΈͳͲʹॏ͖Λஔ͖͍ͨͱࢥ͍·͢
Slide 5
Slide 5 text
ಈըެ։͞Εͯ͠·ͬͨ
https://www.youtube.com/watch?v=DAmMN7m3wLU
Slide 6
Slide 6 text
ํ Binding
Slide 7
Slide 7 text
ํBinding
• ࠓ·ͰΰϦΰϦॻ͔ͳ͚ΕͳΒͳ͔ͬͨํ
Binding͕ҰߦͰॻ͚ΔΑ͏ʹͳͬͨɻ
Slide 8
Slide 8 text
Έ(1)
// ࣗಈੜ͞ΕΔ
private InverseBindingListener editTextandroidTextA = new InverseBindingListener() {
@Override
public void onChange() {
String callbackArg_0 =
android.databinding.adapters.TextViewBindingAdapter.getTextString(editText);
String nameUser = null;
User user = mUser;
if (user != null) {
user.setName(callbackArg_0);
}
}
};
• ෦ͰInverseBindingListenerΛ࡞
Slide 9
Slide 9 text
Έ(2)
// ϑϨʔϜϫʔΫ
@BindingAdapter(value = {"android:beforeTextChanged", "android:onTextChanged",
"android:afterTextChanged", "android:textAttrChanged"}, requireAll = false)
public static void setTextWatcher(TextView view, --- , final InverseBindingListener textAttrChanged) {
final TextWatcher newValue;
if (before == null && after == null && on == null && textAttrChanged == null) {
newValue = null;
} else {
newValue = new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (on != null) {
on.onTextChanged(s, start, before, count);
}
if (textAttrChanged != null) {
textAttrChanged.onChange();
}
}
:
};
}
if (newValue != null) {
view.addTextChangedListener(newValue);
}
}
• Ϧεφʔ͕ηοτ͞ΕΔɻ
Slide 10
Slide 10 text
Έ(3)
// ϑϨʔϜϫʔΫ
@BindingAdapter("android:text")
public static void setText(TextView view, CharSequence text) {
final CharSequence oldText = view.getText();
if (text == oldText || (text == null && oldText.length() == 0)) {
return;
}
if (text instanceof Spanned) {
if (text.equals(oldText)) {
return; // No change in the spans, so don't set anything.
}
} else if (!haveContentsChanged(text, oldText)) {
return; // No content changes, so don't set anything.
}
view.setText(text);
}
• ແݶϧʔϓ͠ͳ͍Α͏ʹɺoldTextͱ৽͍͠
Λ֬ೝ͍ͯ͠Δɻ
Slide 11
Slide 11 text
ࣗ࡞BindingAdapterͰํͯ͠ΈΔ
• ·͍ͣͭ௨ΓBindingAdapterΛ࡞ɻ
• ࣮͜ΕNGɻແݶϧʔϓͯ͠͠·͏ɻsetDateText
͕ݺΕͯɺsetCreatedAt͕ݺΕͯɺsetDateText
͕ݺΕͯɺsetCreatedAt͕ݺΕͯɺɺɺ
@BindingAdapter("dateText")
public static void setDateText(EditText editText, long date) {
editText.setText(String.valueOf(date));
}
Slide 12
Slide 12 text
৽͍͠ͱݹ͍Λ֬ೝ
• ಉ͡ͳΒset͠ͳ͍Α͏ʹ͢Δ
@BindingAdapter("dateText")
public static void setDateText(EditText editText, long date) {
String oldValue = view.getText().toString();
String newValue = String.valueOf(date);
if (oldValue.equals(newValue)) {
return; // ಉ͡ͳΒset͠ͳ͍Α͏ʹ͢Δɻ
}
editText.setText(newValue);
}
Slide 13
Slide 13 text
InverseBindingAdapterΛ࡞͢Δ
• InverseBindingAdapterΛ࡞͢Δ
• ͜ΕΛͱʹ InverseBindingListener ͕ࣗಈੜ͞
ΕΔ
@InverseBindingAdapter(attribute = "dateText", event =
"android:textAttrChanged")
public static long getDateText(EditText view) {
String text = view.getText().toString();
return Long.parseLong(text);
}
Slide 14
Slide 14 text
͜ΕͰํBindingͷ
public class User extends BaseObservable {
@Bindable
private long createdAt;
:
public long getCreatedAt() {
return createdAt;
}
public void setCreatedAt(long createdAt) {
this.createdAt = createdAt;
notifyPropertyChanged(BR.createdAt);
}
Slide 15
Slide 15 text
ϝιουϦϑΝϨϯε
Slide 16
Slide 16 text
ϝιουϦϑΝϨϯε
• onClickonLongClickʹؔΛࢦఆͰ͖ΔΑ͏
ʹͳͬͨɻ
Slide 17
Slide 17 text
ͲͷΠϕϯτʹରԠ͍ͯ͠Δ͔
android:onDrag
android:onClick
android:onApplyWindowInsets
android:onCreateContextMenu
android:onFocusChange
android:onGenericMotion
android:onHover
android:onKey
android:onLongClick
android:onSystemUiVisibilityChange
android:onTouch
• ͪΐͬͱυΩϡϝϯτ͕ݟͨΒͳ͔͕ͬͨ
android.databinding.adapters.ViewBindingAdapterΛݟͨײ͡ɺView
ʹݶͬͯԼهͷΠϕϯτʹରԠ͍ͯ͠Δ͜ͱ͕Θ͔Δɻ
Slide 18
Slide 18 text
• ଞʹ͍Ζ͍Ζ͋Γͦ͏ɻ
• ͨͩશ෦Ͱͳ͍ͱݴ͍ͬͯͨɻ
Slide 19
Slide 19 text
ϝιουϦϑΝϨϯεͰࢦఆ͢
Δϝιου
@BindingMethod(type = View.class, attribute =
"android:onClick", method = "setOnClickListener"),
• ෦ͰԼهͷΑ͏ʹఆٛ͞Ε͍ͯΔɻ
• methodͷฦΓͱҾ(+ view)ʹ߹ΘͤΔඞཁ
͕͋Δɻ
Slide 20
Slide 20 text
Έ
public static class OnLongClickListenerI implements OnLongClickListener{
private Presenter value;
public OnLongClickListenerI setValue(com.kgmyshin.databindingsample.Presenter value) {
this.value = value;
return value == null ? null : this;
}
@Override
public boolean onLongClick(View arg0) {
return this.value.onLongClickButton1(arg0);
}
}
:
private OnLongClickListenerI mAndroidViewViewOnLo;
:
this.button1.setOnLongClickListener(mAndroidViewViewOnLo);
:
• ListenerΛࣗಈੜͯ͠set͍ͯ͠Δ͚ͩɻ
Slide 21
Slide 21 text
ͪΐͬͱ·ͩόΪʔ
• ؔͷͱ͜ΖͰઢͰΔ͠ɺonLongClick࣮ࡍ
ʹ͋Δ͠ಈ͘ͷʹʮͦΜͳͷΒͳ͍ʯͬͯݴ
ΘΕΔɻ
Slide 22
Slide 22 text
ϥϜμࣜ
Slide 23
Slide 23 text
ϥϜμࣜ
• onClickonLongClickʹϥϜμࣜΛࢦఆͰ͖Δ
Α͏ʹͳͬͨɻ
Slide 24
Slide 24 text
ϥϜμࣜͰࢦఆ͢Δϝιου
@BindingMethod(type = View.class, attribute =
"android:onFocusChange", method =
"setOnFocusChangeListener"),
• ϝιουϦϑΝϨϯεಉ༷
• methodͷฦΓͱҾ(+ view)ʹ߹ΘͤΔඞཁ
͕͋Δɻ
Slide 25
Slide 25 text
͜Μͳײ͡
View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
:
}
}
Slide 26
Slide 26 text
ϥϜμࣜͰࢦఆ͢Δϝιου
• ϥϜμࣜͷ߹͚ͩҾΛলུͰ͖Δ(Ұ෦লུͱ͍͏ͷͰ͖ͳ͍)
presenter.showToast(user.name)}"
/>
Slide 27
Slide 27 text
Έ
public final void _internalCallbackOnClick(int sourceId , android.view.View
callbackArg_0) {
com.kgmyshin.databindingsample.User user = mUser;
com.kgmyshin.databindingsample.Presenter presenter = mPresenter;
if (mPresenter != null) {
if (mUser != null) {
nameUser = user.getName();
presenter.showToast(nameUser);
}
}
}
• ී௨ͷjava͕ੜ͞ΕΔɻ
Slide 28
Slide 28 text
Ҏ্Ͱ͢