小编Sau*_*abh的帖子

我正在努力将浮动操作按钮(FAB)变形为工具栏,并且使用以下代码可以顺利完美地工作:

布局文件:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="sg.com.saurabh.designlibraryexpirements.ToolbarMorphActivity">

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top|right"
        android:layout_marginTop="@dimen/activity_vertical_margin"
        android:layout_marginRight="@dimen/activity_vertical_margin"
        android:layout_marginBottom="@dimen/activity_vertical_margin"
        android:src="@drawable/ic_add" />

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        style="@style/ToolBarTheme"
        android:layout_height="?attr/actionBarSize"
        android:layout_gravity="top"
        android:layout_marginTop="@dimen/activity_vertical_margin"
        android:layout_marginBottom="@dimen/activity_vertical_margin"
        android:visibility="invisible"
        tools:visibility="visible" />

</FrameLayout>

活动:

package sg.com.saurabh.designlibraryexpirements;

import android.animation.Animator;
import android.os.Bundle;
import android.os.Handler;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.view.animation.FastOutLinearInInterpolator;
import android.support.v4.view.animation.LinearOutSlowInInterpolator;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.ViewAnimationUtils;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.AnticipateOvershootInterpolator;

public class ToolbarMorphActivity extends AppCompatActivity {

    Toolbar toolbar;
    FloatingActionButton fab;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_toolbar_morph);

        toolbar = (Toolbar) …