如何用 Material 设计动画填充另一个视图？

Question

我正在尝试解决与 Android Material Design 集成的不同功能，但是当视图填充另一个类似的：

你知道怎么做吗？或者 library/project 有这样的例子吗？

Answer 1

解决方案是 pathInterpolator，此效果的名称是 Curved Motion。

Animations in material design rely on curves for time interpolation and spatial movement patterns. With Android 5.0 (API level 21) and above, you can define custom timing curves and curved motion patterns for animations.

你可以在这里看到如何实现它：

http://developer.android.com/training/material/animations.html#CurvedMotion

并在 GitHub HERE 上采样：

Answer 2

我试着在下面实现这个 API 21

和gradle依赖

dependencies {
        compile 'com.github.ozodrukh:CircularReveal:1.0.6@aar'
    }

我的 activity xml 是

activity_reval_anim.xml

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".RevalAnimActivity">

    <ImageView
        android:id="@+id/img_top"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:background="@color/color_primary"

        android:src="@drawable/ala"/>


    <io.codetail.widget.RevealLinearLayout

        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_below="@+id/img_top"
        android:background="@color/color_primary">
        <LinearLayout
            android:visibility="invisible"
            android:id="@+id/ll_reveal"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/color_accent"
            android:orientation="horizontal"
            ></LinearLayout>

    </io.codetail.widget.RevealLinearLayout>
    <ImageButton
        android:id="@+id/img_floating_btn"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_alignParentRight="true"
        android:layout_marginRight="40dp"
        android:layout_marginTop="170dp"
        android:background="@drawable/expand_btn"/>
</RelativeLayout>

我的 Activity java 是

RevalAnimActivity.java

public class RevalAnimActivity extends ActionBarActivity {

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

        final ImageButton mFloatingButton = (ImageButton) findViewById(R.id.img_floating_btn);
        mFloatingButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                animateButton(mFloatingButton);


            }


        });

    }

    private void animateButton(final ImageButton mFloatingButton) {

        mFloatingButton.animate().translationXBy(0.5f).translationY(150).translationXBy(-0.9f)
                .translationX(-150). setDuration(300).setListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);

                animateReavel((int) mFloatingButton.getX(), 150,mFloatingButton);
            }
        });

    }

    private void animateReavel(int cx, int cy, final ImageButton mFloatingButton) {


        final View myView = findViewById(R.id.ll_reveal);

        // get the final radius for the clipping circle
        float finalRadius = hypo(myView.getWidth(), myView.getHeight());

        SupportAnimator animator =
                ViewAnimationUtils.createCircularReveal(myView, cx, cy, 0, finalRadius);
        animator.addListener(new SupportAnimator.AnimatorListener() {
            @Override
            public void onAnimationStart() {
                mFloatingButton.setVisibility(View.INVISIBLE);
                myView.setVisibility(View.VISIBLE);
            }

            @Override
            public void onAnimationEnd() {
                Toast.makeText(getApplicationContext(), "Done", Toast.LENGTH_LONG)
                        .show();
            }

            @Override
            public void onAnimationCancel() {
            }

            @Override
            public void onAnimationRepeat() {
            }
        });
        animator.setInterpolator(new AccelerateDecelerateInterpolator());
        animator.setDuration(1000);
        animator.start();

    }

    static float hypo(int a, int b) {
        return (float) Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2));
    }


}

如何用 Material 设计动画填充另一个视图？

How to fill a view with another with Material Design Animation?

animation

android

material-design