我想在keyboard.xml中使用ViewStub
我有一个带有键盘键的布局，请参见屏幕截图
当我要打开键盘时，由于加载了这么多视图，需要一些时间才能打开。为此我使用了 ViewStub，但它不会减少打开键盘的时间
有人，请帮助解决这个问题，我怎样才能减少这些视图的加载时间
代码
<com.lingapps.appwriter.keyboard.internal.KeyView
android:id="@+id/key_q"
style="@style/keyboard_key_view_mobile"
android:onClick="@{clickListener::onClick}"
android:onLongClick="@{longClickListener::onLongClick}"
custom:code="@integer/q"
custom:layout_constraintLeft_toLeftOf="parent"
custom:layout_constraintRight_toLeftOf="@id/key_w"
custom:layout_constraintTop_toTopOf="parent"
custom:title="@{isShifted?Character.toUpperCase(@integer/q):Character.toLowerCase(@integer/q)}" />
对于我在上面视图中使用的每个键
在这里我正在夸大布局
public class KeyboardView extends LinearLayout implements OnTouchListener, View.OnClickListener, View.OnLongClickListener {
private KeyboardQwertyBinding mBindingQwerty;
private KeyboardSymbolsBinding mBindingSymbol;
private KeyboardSymbolsShiftBinding mBindingSymbolShift;
private ObservableBoolean languageOtherKeyVisibility = new ObservableBoolean(false);
private ObservableBoolean isShiftedObservableBoolean = new ObservableBoolean(false);
private ObservableInt languageKeyObservable1 = new ObservableInt(0);
private ObservableInt languageKeyObservable2 = new ObservableInt(0);
private ObservableInt languageKeyObservable3 = new ObservableInt(0);
private Handler handlerDeleteButton = new Handler();
private int codeDeleteButton;
public boolean keyboardChanged = false;
private boolean previousShift;
private CandidateView mCandidateView;
private RelativeLayout rlCandidateView;
public enum KeyboardType {
QWERTY, SYMBOLS, SYMBOLS_SHIFT
}
public enum KeyboardLocale {
ENGLISH, DANISH, SWEDISH, ENGLISH_US, AUSTRALIAN, DUTCH, GERMAN, SPANISH, FRENCH, BOKMAL, NYNORSK
}
private KeyboardType mKeyboardType = KeyboardType.QWERTY;
private KeyboardLocale mKeyboardLocale = KeyboardLocale.DANISH;
private Keyboard keyboard;
private Context context;
public Keyboard getKeyboard() {
return keyboard;
}
public CandidateView setKeyboard(Keyboard keyboard, boolean languageChange, EditorInfo attribute) {
this.keyboard = keyboard;
this.mKeyboardType = keyboard.getType();
if (keyboard.getLocale() != null) {
this.mKeyboardLocale = keyboard.getLocale();
}
keyboard.setShiftStateListener(shiftListener);
makeKeyboard(languageChange, attribute);
previousShift = false;
return mCandidateView;
}
public KeyboardView(Context context) {
super(context);
this.context = context;
appPreferences = new AppPreferences(context);
setOrientation(LinearLayout.VERTICAL);
setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
public KeyboardView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
setOrientation(LinearLayout.VERTICAL);
setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
/**
* make keyboard for
*
* @param languageChange reinitialize keyboard if language change
* @param attribute editor info
*/
protected void makeKeyboard(boolean languageChange, EditorInfo attribute) {
if (keyboard == null || mKeyboardType == null)
return;
ConstraintLayout linearLayout;
if (mKeyboardType.equals(KeyboardType.SYMBOLS)) {
if (mBindingSymbol == null)
prepareKeyboardLayoutSymbol(attribute);
linearLayout = (ConstraintLayout) mBindingSymbol.getRoot();
} else if (mKeyboardType.equals(KeyboardType.SYMBOLS_SHIFT)) {
if (mBindingSymbolShift == null)
prepareKeyboardLayoutShiftSymbol(attribute);
linearLayout = (ConstraintLayout) mBindingSymbolShift.getRoot();
} else {
if (languageChange && mBindingQwerty == null)
prepareKeyboardLayoutQwerty(attribute);
linearLayout = (ConstraintLayout) mBindingQwerty.getRoot();
}
if (rlCandidateView == null) {
rlCandidateView = (RelativeLayout) LayoutInflater.from(context).inflate(R.layout.candidate_view, new RelativeLayout(context));
}
if (mCandidateView == null) {
if (appWriterSoftKeyboard == null) {
appWriterSoftKeyboard = (AppWriterSoftKeyboard) context;
}
mCandidateView = new CandidateView(context, rlCandidateView);
mCandidateView.setSoftDanishKeyboard(appWriterSoftKeyboard);
}
removeAllViewsInLayout();
setOrientation(VERTICAL);
addView(rlCandidateView);
addView(linearLayout);
invalidate();
requestLayout();
}
/**
* prepare layout for qwerty keyboard
*
* @param attribute editor info
*/
@SuppressLint("ClickableViewAccessibility")
private void prepareKeyboardLayoutQwerty(EditorInfo attribute) {
mBindingQwerty = DataBindingUtil.inflate(LayoutInflater.from(context), R.layout.keyboard_qwerty, null, false);
mBindingQwerty.setLanguageOtherKeyVisibility(languageOtherKeyVisibility);
mBindingQwerty.setIsShifted(isShiftedObservableBoolean);
mBindingQwerty.setLanguageKey1(languageKeyObservable1);
mBindingQwerty.setLanguageKey2(languageKeyObservable2);
mBindingQwerty.setLanguageKey3(languageKeyObservable3);
getKeyboardLayout();
mBindingQwerty.setClickListener(KeyboardView.this);
mBindingQwerty.setLongClickListener(KeyboardView.this);
mBindingQwerty.keyBackspace.setOnTouchListener(KeyboardView.this);
setImeOption(attribute, mBindingQwerty.keyEnter);
}
public boolean isShifted() {
return getKeyboard().isShifted();
}
public void setShifted(boolean b) {
if (getKeyboard() != null)
getKeyboard().setShifted(b);
}
private ShiftStateListener shiftListener = new ShiftStateListener() {
@Override
public void onShiftChange(boolean isShifted) {
if (getKeyboard() == null)
return;
if (previousShift != isShifted) {
isShiftedObservableBoolean.set(isShifted);
previousShift = isShifted;
}
}
};
}