您好,登錄后才能下訂單哦!
小編給大家分享一下Android實現炫酷播放效果的方法,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!
具體內容如下
一、首先看效果
二、實現原理
使用貝塞爾曲線實現滑動效果,在使用屬性動畫實現水波紋效果,然后就能實現以上效果
三、實現
1、先封裝動畫框架,創建動畫基礎類
PathPoint.java
public class PathPoint { public static final int MOVE = 0; public static final int LINE = 1; public static final int CURVE = 2; float mControl0X, mControl0Y; float mControl1X, mControl1Y; public float mX, mY; int mOperation; //line/move private PathPoint(int operation, float x, float y) { this.mOperation = operation; this.mX = x; this.mY = y; } //curve private PathPoint(float c0X, float c0Y, float c1X, float c1Y, float x, float y) { this.mControl0X = c0X; this.mControl0Y = c0Y; this.mControl1X = c1X; this.mControl1Y = c1Y; this.mX = x; this.mY = y; this.mOperation = CURVE; } public static PathPoint moveTo(float x, float y) { return new PathPoint(MOVE, x, y); } public static PathPoint lineTo(float x, float y) { return new PathPoint(LINE, x, y); } public static PathPoint curveTo(float c0X, float c0Y, float c1X, float c1Y, float x, float y) { return new PathPoint(c0X, c0Y, c1X, c1Y, x, y); } }
2、創建動畫集合類,并且保存繪制軌跡
AnimatorPath
public class AnimatorPath { //記錄軌跡 private List<PathPoint> mPoints = new ArrayList<>(); public void moveTo(float x, float y) { mPoints.add(PathPoint.moveTo(x, y)); } public void lineTo(float x, float y) { mPoints.add(PathPoint.lineTo(x, y)); } public void curveTo(float c0X, float c0Y, float c1X, float c1Y, float x, float y) { mPoints.add(PathPoint.curveTo(c0X, c0Y, c1X, c1Y, x, y)); } public Collection<PathPoint> getPoints() { return mPoints; } }
3、實現頁面布局
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ffe8e8e8"> <ImageView android:id="@+id/album_cover" android:layout_width="match_parent" android:layout_height="250dp" android:background="#22eeff" /> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="120dp" android:layout_below="@id/album_cover" android:layout_marginTop="-15dp" android:background="@color/colorPrimary" android:elevation="4dp" android:minHeight="?attr/actionBarSize" android:paddingLeft="72dp"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:fontFamily="sans-serif" android:text="大海大海" android:textColor="#FFF" android:textSize="30sp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:fontFamily="sans-serif-light" android:text="王小二" android:textColor="#9cffffff" android:textSize="18sp" /> </LinearLayout> </android.support.v7.widget.Toolbar> <FrameLayout android:id="@+id/fab_container" android:layout_width="match_parent" android:layout_height="128dp" android:layout_below="@id/album_cover" android:layout_marginTop="-30dp" android:elevation="10dp"> <LinearLayout android:id="@+id/media_controls_container" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:orientation="horizontal"> <ImageView android:layout_width="20dp" android:layout_height="20dp" android:scaleX="0" android:scaleY="0" android:src="@mipmap/play" /> <ImageView android:id="@+id/iv_pause_play" android:layout_width="20dp" android:layout_height="20dp" android:layout_marginLeft="50dp" android:layout_marginRight="50dp" android:scaleX="0" android:scaleY="0" android:src="@mipmap/play" /> <ImageView android:layout_width="20dp" android:layout_height="20dp" android:layout_marginRight="50dp" android:scaleX="0" android:scaleY="0" android:src="@mipmap/play" /> </LinearLayout> <ImageButton android:id="@+id/fab" android:layout_width="56dp" android:layout_height="56dp" android:layout_gravity="top|right" android:layout_marginRight="72dp" android:background="@drawable/ripple" android:elevation="5dp" android:onClick="onPabPressed" android:transitionName="button_fab" /> </FrameLayout> </RelativeLayout>
4、獲取控件,并且設置點擊事件,設置一些動畫常量
private View mFab; private FrameLayout mFabcontainer; private LinearLayout mControlsContainer; //從什么時候開始執行動畫 private static final float SCALE_FACTOR = 13f; //持續時間 private static final long ANIMATION_DURATION = 300; //貝塞爾曲線滑動到什么時候開始執行動畫 private static final float MINIMUN_X_DISTANCE = 200; private boolean mRevealFlag; private float mFabSize;
5、給mFab設置點擊事件
private void onFabPressed(View view) { final float startX = mFab.getX(); //開始動畫 AnimatorPath path = new AnimatorPath(); path.moveTo(0, 0); path.curveTo(-200, 200, -400, 100, -600, 50); // path.lineTo(-600,50); ObjectAnimator anim = ObjectAnimator.ofObject(this, "fabLoc", new PathEvaluator(), path.getPoints().toArray()); anim.setInterpolator(new AccelerateInterpolator()); // anim.setRepeatCount(ValueAnimator.INFINITE); // anim.setRepeatMode(ValueAnimator.REVERSE); anim.setDuration(ANIMATION_DURATION); anim.start(); anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { //到了path路徑中的某個位置就是開始擴散動畫 if (Math.abs(startX - mFab.getX()) > MINIMUN_X_DISTANCE) { if (!mRevealFlag) { ImageButton fab = (ImageButton) mFab; fab.setImageDrawable(new BitmapDrawable()); //看布局里邊的FabContainer要比toolbar背景高mFabSize/2(為了最初的半個fab效果) mFabcontainer.setY(mFabcontainer.getY() + mFabSize / 2); //fab放大動畫 mFab.animate() .scaleXBy(SCALE_FACTOR) .scaleYBy(SCALE_FACTOR) .setListener(mEndRevealListener) .setDuration(ANIMATION_DURATION); mRevealFlag = true; } } } }); } public void setFabLoc(PathPoint newLoc) { mFab.setTranslationX(newLoc.mX); if (mRevealFlag) { //因為布局里邊的mFabcontainer要比toolbar背景高mFabSize/2,所以fab為了看起來平順,需要上移mFabSize/2 mFab.setTranslationY(newLoc.mY - (mFabSize / 2)); } else { mFab.setTranslationY(newLoc.mY); } } private AnimatorListenerAdapter mEndRevealListener = new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); mFab.setVisibility(View.INVISIBLE); mFabcontainer.setBackgroundColor(getResources().getColor(R.color.colorAccent)); //reveal動畫完畢后,接著每一個子控件都有個縮放動畫(依次順序出來) for (int i = 0; i < mControlsContainer.getChildCount(); i++) { View v = mControlsContainer.getChildAt(i); ViewPropertyAnimator animate = v.animate() .scaleX(1) .scaleY(1) .setDuration(ANIMATION_DURATION); animate.setStartDelay(i * 50); animate.start(); } } };
PathEvaluator
public class PathEvaluator implements TypeEvaluator<PathPoint> { @Override public PathPoint evaluate(float t, PathPoint startValue, PathPoint endValue) { //t執行的百分比 (0~1) float x, y; if (endValue.mOperation == PathPoint.CURVE) { //三階貝塞爾曲線 公式 float oneMinusT = 1 - t; x = oneMinusT * oneMinusT * oneMinusT * startValue.mX + 3 * oneMinusT * oneMinusT * t * endValue.mControl0X + 3 * oneMinusT * t * t * endValue.mControl1X + t * t * t * endValue.mX; y = oneMinusT * oneMinusT * oneMinusT * startValue.mY + 3 * oneMinusT * oneMinusT * t * endValue.mControl0Y + 3 * oneMinusT * t * t * endValue.mControl1X + t * t * t * endValue.mY; } else if (endValue.mOperation == PathPoint.LINE) { //x=起始點+t*起始點和終點的距離 x = startValue.mX + t * (endValue.mX - startValue.mX); y = startValue.mY + t * (endValue.mY - startValue.mY); } else { x = endValue.mX; y = endValue.mY; } return PathPoint.moveTo(x, y); } }
注意:屬性動畫既可以改變屬性,也可以改變一個變量或者方法
以上是“Android實現炫酷播放效果的方法”這篇文章的所有內容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內容對大家有所幫助,如果還想學習更多知識,歡迎關注億速云行業資訊頻道!
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。