fab.setVisibility(View.GONE)不起作用

时间:2016-09-10 18:24:31

标签: java android xml android-layout floating-action-button

我没有使用锚,它应该工作。 通常,可见性消失了(由XML设置)。当我按下按钮时,它变得可见(直到这里,工作)。然后,当我按下另一个按钮时,它应该消失,但没有任何反应。 减少XML:

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:id="@+id/tbTela3"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:layout_scrollFlags="scroll|enterAlways"
        app:popupTheme="@style/ToolBar"
        app:titleTextColor="#757575"
        app:subtitleTextColor="#757575" />

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/cLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/tbTela3">

        <ScrollView>
            [...]
        </ScrollView>

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|end"
            android:layout_margin="16dp"
            android:elevation="8dp"
            android:src="@drawable/replay"
            android:visibility="gone"/>

    </android.support.design.widget.CoordinatorLayout>
</RelativeLayout>

减少主要活动:

public void ZoomIn() {

    [...]

    zoomIn.setAnimationListener(new Animation.AnimationListener() {
        public void onAnimationStart(Animation anim) {}
        public void onAnimationRepeat(Animation anim) {}

        public void onAnimationEnd(Animation anim) {
            fab.setVisibility(View.VISIBLE); // WORKS FINE
        }
    });

    fab.startAnimation(zoomIn);
}

[...]

public void Clear() {

    [...]

    anim.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            super.onAnimationEnd(animation);
            readX.requestFocus();
            cardII.setVisibility(View.GONE); // WORKS FINE TOO
            fab.setVisibility(View.GONE); // BUT THIS DON'T

            fadeOut.setAnimationListener(new Animation.AnimationListener() {
                public void onAnimationStart(Animation anim) {}
                public void onAnimationRepeat(Animation anim) {}

                public void onAnimationEnd(Animation anim) {
                    clear.setVisibility(View.INVISIBLE); 
                }
            });

            clear.startAnimation(fadeOut);
        }
    });

    anim.start();

}

fab.setVisibility(View.GONE)不能独立于它所处的位置Clear ...我将代码简化为更易读,希望这不是问题。

3 个答案:

答案 0 :(得分:1)

        CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
        p.setAnchorId(View.NO_ID);
        fab.setLayoutParams(p);
        fab.setVisibility(View.GONE);

或尝试

    fab.show(); //show
    fab.hide(); //hide

答案 1 :(得分:0)

CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
        p.setAnchorId(View.NO_ID);
        fab.setLayoutParams(p);
        fab.setVisibility(View.invisible);

不要使用GONE

不可见:

此视图不可见,但仍会占用布局空间。

GONE:

此视图不可见,并且不会占用任何空间进行布局。

不可见:

Adapter的getView()函数名为

GONE:

适配器的getView()函数没有调用,因此在不需要时阻止视图加载

答案 2 :(得分:0)

现在一切正常。最终代码:

public void ZoomIn() {

    [...]

    fab.show();
}

我删除了所有内容并放入fab.show()

public void Clear() {

    [...]

    anim.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            super.onAnimationEnd(animation);
            readX.requestFocus();
            cardII.setVisibility(View.GONE);
            fab.setVisibility(View.GONE);

            fadeOut.setAnimationListener(new Animation.AnimationListener() {
                public void onAnimationStart(Animation anim) {}
                public void onAnimationRepeat(Animation anim) {}

                public void onAnimationEnd(Animation anim) {
                    clear.setVisibility(View.INVISIBLE); 
                }
            });

            clear.startAnimation(fadeOut);
        }
    });

    anim.start();

}