关于CoordinatorLayout的动画使用

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之前看Material Design的时候跟着写的几个效果，是关于CoordinatorLayout里面的一些控件动画的使用，记录一下使用方法

FloatingActionButton跟随Snackbar移动

image

布局代码：

java代码

 final FloatingActionButton fab_1= (FloatingActionButton) findViewById(R.id.fab_1);
        fab_1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Snackbar.make(fab_1,"哈哈",Snackbar.LENGTH_SHORT).show();
            }
        });

Toolbar跟随RecyclerView消失

image

布局代码

java代码

    Toolbar toolbar= (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("哈哈");

制造toolbar的折叠效果

image

布局代码

java代码

   CollapsingToolbarLayout collapsingToolbar =
                (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
        collapsingToolbar.setTitle("Title");

第四种：制造视差效果

image

布局代码

java代码

     CollapsingToolbarLayout collapsingToolbar =
                (CollapsingToolbarLayout) findViewById(R.id.maincollapsing);
        collapsingToolbar.setTitle("Title");

FloatingActionBar随RecyclerView的消失和出现

image

布局代码

java代码 ScrollAwareFABBehavior

package com.example.tyhj.pull;

import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.View;

public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior {
    public ScrollAwareFABBehavior(Context context, AttributeSet attrs) {
        super();
    }


    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout,
                                       FloatingActionButton child, View directTargetChild, View target, int nestedScrollAxes) {
        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL ||
                super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target,
                        nestedScrollAxes);
    }

    @Override
    public void onNestedScroll(CoordinatorLayout coordinatorLayout, FloatingActionButton child,
                               View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed,
                dyUnconsumed);

        if (dyConsumed > 0 && child.getVisibility() == View.VISIBLE) {
            child.hide();
        } else if (dyConsumed < 0 && child.getVisibility() != View.VISIBLE) {
            child.show();
        }
    }
}

java代码 Activity

   CollapsingToolbarLayout collapsingToolbar = (CollapsingToolbarLayout) findViewById(R.id.maincollapsing);
        collapsingToolbar.setTitle("Title");

其中ScrollAwareFABBehavior是一个自定义的类，此处只是一个默认的消失和出现的动画，通过这个类应该可以自己设计出自己想要的各种控件的效果，用法是在xml的FloatingActionBar（其他应该也是可以）中添加如下代码：

app:layout_behavior="com.example.tyhj.pull.ScrollAwareFABBehavior" 

如果这个自定义类用下面的代码，自定义了两个动画效果，会实现滑入和滑出的效果，好看一些：

package com.example.tyhj.pull;

import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.ViewPropertyAnimatorListener;
import android.support.v4.view.animation.FastOutSlowInInterpolator;
import android.util.AttributeSet;
import android.view.View;

public class ScrollAwareFABBehavior2 extends FloatingActionButton.Behavior {
    private static final android.view.animation.Interpolator INTERPOLATOR = new FastOutSlowInInterpolator();
    private boolean mIsAnimatingOut = false;

    public ScrollAwareFABBehavior2(Context context, AttributeSet attrs) {
        super();
    }


    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout,
                                       FloatingActionButton child, View directTargetChild, View target, int nestedScrollAxes) {
        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL ||
                super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target,
                        nestedScrollAxes);
    }

    @Override
    public void onNestedScroll(CoordinatorLayout coordinatorLayout, FloatingActionButton child,
                               View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed,
                dyUnconsumed);

        if (dyConsumed > 0 && !this.mIsAnimatingOut && child.getVisibility() == View.VISIBLE) {
            animateOut(child);
        } else if (dyConsumed < 0 && child.getVisibility() != View.VISIBLE) {
            animateIn(child);
        }
    }

    private void animateOut(final FloatingActionButton button) {
        ViewCompat.animate(button).translationY(500)
                .setInterpolator(INTERPOLATOR).withLayer()
                .setListener(new ViewPropertyAnimatorListener() {
                    @Override
                    public void onAnimationStart(View view) {
                        ScrollAwareFABBehavior2.this.mIsAnimatingOut = true;
                    }

                    @Override
                    public void onAnimationEnd(View view) {
                        ScrollAwareFABBehavior2.this.mIsAnimatingOut = false;
                        view.setVisibility(View.GONE);
                    }

                    @Override
                    public void onAnimationCancel(View view) {
                        ScrollAwareFABBehavior2.this.mIsAnimatingOut = false;

                    }
                }).start();
    }

    private void animateIn(FloatingActionButton button) {
        button.setVisibility(View.VISIBLE);
        ViewCompat.animate(button).translationY(0)
                .setInterpolator(INTERPOLATOR).withLayer().setListener(null)
                .start();
    }
}

项目地址：https://github.com/tyhjh/Coordinator-Layout