android – 浮动操作按钮边框颜色不会改变

我使用以下代码更改了浮动操作按钮backgroundTintList颜色：

fab.setBackgroundTintList(ColorStateList.valueOf(mResources.getColor(R.color.fab_color)));

但我最终在API 4.4.2上得到以下内容：

在API 21上的一切看起来都很好< =但是在API 21之下的任何东西,我对FAB都有这个问题. 我是以编程方式创建FAB,如下所示：

FloatingActionButton fab = new FloatingActionButton(this);
    CoordinatorLayout.LayoutParams layoutParams = new CoordinatorLayout.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
    fab.setLayoutParams(layoutParams);
    layoutParams.rightMargin = mResources.getDimensionPixelSize(R.dimen.activity_horizontal_margin);
    ((CoordinatorLayout) findViewById(R.id.coordinatorLayout)).addView(fab);
 
    CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
    p.setAnchorId(R.id.appBarLayout);
    p.anchorGravity = Gravity.BOTTOM | Gravity.END;
    fab.setLayoutParams(p);
    fab.setVisibility(View.VISIBLE);
    fab.setBackgroundTintList(ColorStateList.valueOf(mResources.getColor(R.color.fab_color)));
    fab.setImageDrawable(getResources().getDrawable(R.drawable.ic_button));

我也碰巧在FloatingActionButton的官方source code上运行,我看到他们在这里实例化borderDrawable：

@Override
void setBackgroundDrawable(Drawable originalBackground,ColorStateList backgroundTint,PorterDuff.Mode backgroundTintMode,int rippleColor,int borderWidth) {
    // Now we need to tint the original background with the tint
    mShapeDrawable = DrawableCompat.wrap(originalBackground.mutate());
    DrawableCompat.setTintList(mShapeDrawable,backgroundTint);
    if (backgroundTintMode != null) {
        DrawableCompat.setTintMode(mShapeDrawable,backgroundTintMode);
    }
 
    final Drawable rippleContent;
    if (borderWidth > 0) { // BORDER DRAWABLE RIGHT HERE!!
        mBorderDrawable = createBorderDrawable(borderWidth,backgroundTint);
        rippleContent = new LayerDrawable(new Drawable[]{mBorderDrawable,mShapeDrawable});
    } else {
        mBorderDrawable = null;
        rippleContent = mShapeDrawable;
    }
 
    mRippleDrawable = new RippleDrawable(ColorStateList.valueOf(rippleColor),rippleContent,null);
 
    mShadowViewDelegate.setBackgroundDrawable(mRippleDrawable);
    mShadowViewDelegate.setShadowPadding(0,0);
}

解决方法

只需更改样式文件中的coloraccent

<item name="colorAccent">@color/colorAccent</item>

添加你想要的颜色作为FAB的背景颜色

编辑：okk ..这里是你可以做的另一种选择..在你的xml中定义这个FAB

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    app:backgroundTint="@color/fab_color"
    android:layout_margin="@dimen/fab_margin"
    android:src="@android:drawable/ic_dialog_email" />

并且它将进行更改,然后您不需要以编程方式执行.

android – 浮动操作按钮边框颜色不会改变

解决方法

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