Android炫酷廣東快樂十分搭建的播放效果
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); }
}
創建動畫集合類，並且保存繪制軌跡
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"
<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，並且設置點擊事件，設置一些動畫常量
private View mFab;
private FrameLayout mFabcontainer;
private LinearLayout mControlsContainer;
//從什麽時候開始執行動畫
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麽時候開始執行動畫
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
br/>@Override
//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());
//看布局裏邊的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) {
//因為布局裏邊的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動畫完畢後，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
br/>@Override
//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);
}}
註意：屬性動畫既可以改變屬性，也可以改變一個變量或者方法
Android炫酷廣東快樂十分搭建的播放效果