我正在处理应用程序中的一些片段我想隐藏FloatingActionButtton。 当我设置 android:visibility ="去了" 。当我向上和向下滑动时,行为动画向我显示FloatingActionButtton。是否有任何方法可以禁用/启用FloatingActionButtton行为。
谢谢你提前。
这是我的代码
QuickReturnFooterBehavior.java
package com.app.common;
import android.animation.Animator;
import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.animation.FastOutSlowInInterpolator;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewPropertyAnimator;
@SuppressWarnings("unused")
public class QuickReturnFooterBehavior extends CoordinatorLayout.Behavior<View> {
private static final FastOutSlowInInterpolator INTERPOLATOR = new FastOutSlowInInterpolator();
private int mDySinceDirectionChange;
private boolean mIsShowing;
private boolean mIsHiding;
public QuickReturnFooterBehavior() {
}
public QuickReturnFooterBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {
return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0;
}
@Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dx, int dy, int[] consumed) {
if (dy > 0 && mDySinceDirectionChange < 0
|| dy < 0 && mDySinceDirectionChange > 0) {
// We detected a direction change- cancel existing animations and reset our cumulative delta Y
child.animate().cancel();
mDySinceDirectionChange = 0;
}
mDySinceDirectionChange += dy;
if (mDySinceDirectionChange > child.getHeight()
&& child.getVisibility() == View.VISIBLE
&& !mIsHiding) {
hide(child);
} else if (mDySinceDirectionChange < 0
&& child.getVisibility() == View.GONE
&& !mIsShowing) {
show(child);
}
}
/**
* Hide the quick return view.
*
* Animates hiding the view, with the view sliding down and out of the screen.
* After the view has disappeared, its visibility will change to GONE.
*
* @param view The quick return view
*/
private void hide(final View view) {
mIsHiding = true;
ViewPropertyAnimator animator = view.animate()
.translationY(view.getHeight())
.setInterpolator(INTERPOLATOR)
.setDuration(200);
animator.setListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animator) {}
@Override
public void onAnimationEnd(Animator animator) {
// Prevent drawing the View after it is gone
mIsHiding = false;
view.setVisibility(View.GONE);
}
@Override
public void onAnimationCancel(Animator animator) {
// Canceling a hide should show the view
mIsHiding = false;
if (!mIsShowing) {
show(view);
}
}
@Override
public void onAnimationRepeat(Animator animator) {}
});
animator.start();
}
/**
* Show the quick return view.
*
* Animates showing the view, with the view sliding up from the bottom of the screen.
* After the view has reappeared, its visibility will change to VISIBLE.
*
* @param view The quick return view
*/
private void show(final View view) {
mIsShowing = true;
ViewPropertyAnimator animator = view.animate()
.translationY(0)
.setInterpolator(INTERPOLATOR)
.setDuration(200);
animator.setListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animator) {
view.setVisibility(View.VISIBLE);
}
@Override
public void onAnimationEnd(Animator animator) {
mIsShowing = false;
}
@Override
public void onAnimationCancel(Animator animator) {
// Canceling a show should hide the view
mIsShowing = false;
if (!mIsHiding) {
hide(view);
}
}
@Override
public void onAnimationRepeat(Animator animator) {}
});
animator.start();
}
}
和XML
<android.support.design.widget.FloatingActionButton
app:layout_behavior="com.app.common.QuickReturnFooterBehavior"
android:id="@+id/fab_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:src="@drawable/ic_action_quick_response_code"
app:backgroundTint="@color/text_gray"
app:descriptionText="@string/add_friend"
app:elevation="3dp"
app:borderWidth="0dp"
/>
答案 0 :(得分:19)
最后我找到了解决方案,我想和你分享。
您可以启用/禁用 FloatingActionButton行为
禁用行为
FloatingActionButton fab2 = (FloatingActionButton)findViewById(R.id.fab2);
CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) fab2.getLayoutParams();
params.setBehavior(null);
fab2.requestLayout();
fab2.setVisibility(View.GONE);
启用行为
CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) fab2.getLayoutParams();
params.setBehavior(new QuickReturnFooterBehavior());
fab2.requestLayout();
fab2.setVisibility(View.VISIBLE);
已编辑:更多可重复使用的课程
public class CoordinateBehaviourUtils {
public static void enableDisableViewBehaviour(View view,CoordinatorLayout.Behavior<View> behavior,boolean enable){
CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) view.getLayoutParams();
params.setBehavior(behavior);
view.requestLayout();
view.setVisibility((enable ? View.VISIBLE: View.GONE));
}
}
如何启用公共类
FloatingActionButton fab2 = (FloatingActionButton)findViewById(R.id.fab2);
CoordinateBehaviourUtils.enableDisableViewBehaviour(fab2,new QuickReturnFooterBehavior(),true);
如何使用公共类禁用
FloatingActionButton fab2 = (FloatingActionButton)findViewById(R.id.fab2);
CoordinateBehaviourUtils.enableDisableViewBehaviour(fab2,null,false);
希望它能解决你的问题:)
答案 1 :(得分:0)
在设置FAB的可见性时没有区别,它可能是其他控件。
0 is for VISIBLE
4 is for INVISIBLE
8 is for GONE
你可以试试这个;
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
// to make is disable for some requirement
fab.setVisibility(View.GONE);
// to make it enable
fab.setVisibility(View.VISIBLE);
答案 2 :(得分:0)
在kotlin中启用/禁用为:
fab.isEnabled = true
fab.isEnabled = false