FloatingActionButton checkable
I created Activity
with AppBar
, FloatingActionButton
and a RecyclerView
. I am implementing my own FAB because I want it to be testable. Here is my code:
public class CheckableFloatingActionButton extends FloatingActionButton implements Checkable {
private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked};
private boolean checked = false;
private boolean broadcasting;
private OnCheckedChangeListener onCheckedChangeListener;
public interface OnCheckedChangeListener {
void onCheckedChanged(CheckableFloatingActionButton fab, boolean isChecked);
}
public CheckableFloatingActionButton(Context context) {
this(context, null);
}
public CheckableFloatingActionButton(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CheckableFloatingActionButton);
setChecked(a.getBoolean(R.styleable.CheckableFloatingActionButton_checked, false));
a.recycle();
}
@Override
public void setChecked(boolean checked) {
if (this.checked != checked) {
this.checked = checked;
refreshDrawableState();
if (broadcasting) {
return;
}
broadcasting = true;
if (onCheckedChangeListener != null) {
onCheckedChangeListener.onCheckedChanged(this, this.checked);
}
broadcasting = false;
}
}
public void toggle(boolean animate) {
if (animate) {
setChecked(checked);
return;
}
checked = !checked;
jumpDrawablesToCurrentState();
}
public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
onCheckedChangeListener = listener;
}
@Override
public boolean performClick() {
toggle();
return super.performClick();
}
@Override
public boolean isChecked() {
return checked;
}
@Override
public void toggle() {
setChecked(!checked);
}
@Override
public int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
if (isChecked()) {
mergeDrawableStates(drawableState, CHECKED_STATE_SET);
}
return drawableState;
}
}
Works until I scroll up / down and hide / show the FAB. As you can see, the FAB animates the pull-out rather than immediately. This is why (I think) the error occurs. Is there a way to solve it?
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The FloatingActionButtonBasic sample in Android Studio includes an implementation Checkable
FloatingActionButton
. It works well when you scroll up / down with CollapsingToolbarLayout
. But I think using https://developer.android.com/reference/android/widget/CompoundButton.html would be an even more elegant solution.
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If it is a FloatingAcionsMenu you can use a listener for when it expands or not, why don't you use a listener when it expands the check if the "checked" parameter is true and if it fills the drawable.
fam.setOnFloatingActionsMenuUpdateListener(new FloatingActionsMenu.OnFloatingActionsMenuUpdateListener() {
@Override
public void onMenuExpanded() {
if(checked){
//do something
}
}
@Override
public void onMenuCollapsed() {
}
});
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