这篇文章主要介绍了Android怎么实现纸飞机,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
一、首先自定义一个RelativeLayout,主要目的就是制作飞机的进入动画:
public class PaperPlaneLayout extends RelativeLayout implements View.OnClickListener{ private OnClickListener mOnClickListener; //自定义布局的宽、高 private int mHeight; private int mWidth; private LayoutParams lp; private Drawable[] drawables; private Random random = new Random(); //获取4架纸飞机的宽高 private int dHeight; private int dWidth; private int mX; private int mY; public PaperPlaneLayout(Context context) { super(context); init(); } public PaperPlaneLayout(Context context, AttributeSet attrs) { super(context, attrs); init(); } public PaperPlaneLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } @TargetApi(Build.VERSION_CODES.LOLLIPOP) public PaperPlaneLayout(Context context, AttributeSet attrs,int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); init(); } private void init() { // 初始化显示的图片 drawables = new Drawable[4]; Drawable pink = getResources().getDrawable(R.drawable.pl_pink); Drawable yellow = getResources().getDrawable(R.drawable.pl_yellow); Drawable green = getResources().getDrawable(R.drawable.pl_green); Drawable blue = getResources().getDrawable(R.drawable.pl_blue); drawables[0] = blue; drawables[1] = yellow; drawables[2] = green; drawables[3] = pink; // 获取图的宽高 用于后面的计算 // 注意 我这里4张图片的大小都是一样的,所以我只取了一个 dHeight = UIUtility.dipTopx(getContext(), 80); dWidth = UIUtility.dipTopx(getContext(), 80); lp = new LayoutParams(dWidth, dHeight); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); mWidth = getMeasuredWidth(); mHeight = getMeasuredHeight(); } //真正动画开始的入口,从外部进行调用,x、y分别表示飞机进入之后所 //停留的位置坐标 public void addHeart(int x, int y, int position) { mX = x; mY = y; ImageView imageView = new ImageView(getContext()); // 随机选一个 imageView.setImageDrawable(drawables[position]); imageView.setLayoutParams(lp); addView(imageView); //获取进入前后动画 Animator set = getAnimator(imageView); set.start(); imageView.setOnClickListener(this); } private Animator getAnimator(View target) { AnimatorSet set = getEnterAnimator(target); AnimatorSet set2 = getLineAnimation(target); AnimatorSet finalSet = new AnimatorSet(); finalSet.playSequentially(set, set2); finalSet.setInterpolator(new LinearInterpolator()); finalSet.setTarget(target); return finalSet; } private AnimatorSet getEnterAnimator(final View target) { ObjectAnimator alpha = ObjectAnimator .ofFloat(target, View.ALPHA, 0.2f, 1f); ObjectAnimator translationX = ObjectAnimator .ofFloat(target, View.TRANSLATION_X, -2 * mWidth, -mWidth); AnimatorSet enter = new AnimatorSet(); enter.setDuration(500); enter.setInterpolator(new LinearInterpolator()); enter.playTogether(translationX, alpha); enter.setTarget(target); return enter; } private AnimatorSet getLineAnimation(final View iconView) { ObjectAnimator transX = ObjectAnimator .ofFloat(iconView, "translationX", -dWidth, mX); ObjectAnimator transY = ObjectAnimator .ofFloat(iconView, "translationY", (mHeight - dHeight) / 2, mY); transY. setInterpolator(PathInterpolatorCompat .create(0.7f, 1f)); AnimatorSet flyUpAnim = new AnimatorSet(); flyUpAnim.setDuration(900); flyUpAnim.playTogether(transX, transY); flyUpAnim.setTarget(iconView); return flyUpAnim; } @Override public void onClick(View v) { if (mOnClickListener != null) { mOnClickListener.onClick((ImageView) v); } } //定义ImageView单击事件 public interface OnClickListener { void onClick(ImageView v); }
二、接下来就是布局文件的搭建了(只选取一部分控件)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/relative_plane_bj" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/paper_plane_bg"> <!--白云--> <ImageView android:id="@+id/img_white_cloud" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/paper_plane_cloud" android:layout_centerHorizontal="true" android:layout_marginTop="30dp" /> <!--自定义的飞机布局动画--> <com.cloudi.forum.view.PaperPlaneLayout android:id="@+id/plane_layout" android:layout_width="match_parent" android:layout_height="match_parent"/> </RelativeLayout>
三、接下来就可以在Activity中使用了:
public class PlaneActivity extends AppCompatActivity{ @Bind(R.id.img_white_cloud) ImageView mImgWhiteCloud; @Bind(R.id.plane_layout) PaperPlaneLayout mPlaneLayout; private Context mContext; private ObjectAnimator objCloudAnim; private TranslateAnimation planeAnimation; private float iconX, iconY; //设置飞机是否已点击,如果为true,则另一个飞机不可点击 private boolean mIsClick = true; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_plane_layout); ButterKnife.bind(this); mContext = getApplicationContext(); //初始化动画 initAnimation(); initListener(); } private void initAnimation() { //设定纸飞机进入的位置 initPlaneEnterAnimation(); //飞机进入后做上下浮动 initPlaneAnimation(); //云彩循环从屏幕右侧飘到屏幕左侧 initCloudAnimation(); } //设定纸飞机进入的位置 private void initPlaneEnterAnimation() { for (int i = 0; i < 4; i++) { final int temp = i; mPlaneLayout.post(new Runnable() { @Override public void run() { //下面的值根据用户自己设定 if (temp == 0) { mPlaneLayout.addHeart( 100dp, 140dp, 0); } if (temp == 1) { mPlaneLayout.addHeart( 屏宽 - 120dp, 190dp, 1); } if (temp == 2) { mPlaneLayout.addHeart( 30dp, 240dp, 2); } if (temp == 3) { mPlaneLayout.addHeart( 屏宽 - 210, 290, 3); } } }); } } //飞机进入后做上下浮动 private void initPlaneAnimation() { planeAnimation = new TranslateAnimation(0, 0, -10, 10); planeAnimation.setDuration(1000); planeAnimation.setRepeatCount(Animation.INFINITE); planeAnimation.setRepeatMode(Animation.REVERSE); mPlaneLayout.setAnimation(planeAnimation); planeAnimation.start(); } //云彩循环从屏幕右侧飘到屏幕左侧 private void initCloudAnimation() { if (objCloudAnim == null) { objCloudAnim = ObjectAnimator .ofFloat(mImgWhiteCloud, "translationX", 屏宽 - 50, -屏宽); // 设置持续时间 objCloudAnim.setDuration(5000); // 设置循环播放 objCloudAnim.setRepeatCount( ObjectAnimator.INFINITE); } objCloudAnim.start(); } private void initListener() { mPlaneLayout.setOnClickListener(new PaperPlaneLayout.OnClickListener() { @Override public void onClick(ImageView v) { if (mIsClick) { mIsClick = false; iconX = v.getX(); iconY = v.getY(); //当点击某一个纸飞机时,飞机会有一个飞出动画 planeOutAnimation(v); } } }); } /** * 飞机飞出动画 */ private void planeOutAnimation(final View iconView) { AnimatorSet flyUpAnim = new AnimatorSet(); flyUpAnim.setDuration(600); ObjectAnimator transX = ObjectAnimator .ofFloat(iconView, "translationX", iconView.getX(), UIUtility.getScreenWidth(mContext) * 2); ObjectAnimator transY = ObjectAnimator .ofFloat(iconView, "translationY", 0, - UIUtility.getScreenHeight(mContext) * 2); transY.setInterpolator(PathInterpolatorCompat .create(0.7f, 1f)); ObjectAnimator rotation = ObjectAnimator .ofFloat(iconView, "rotation", -45, 0); rotation.setInterpolator(new DecelerateInterpolator()); ObjectAnimator rotationX = ObjectAnimator .ofFloat(iconView, "rotationX", 0, 60); rotationX.setInterpolator( new DecelerateInterpolator()); flyUpAnim.playTogether(transX, transY, rotationX, ObjectAnimator .ofFloat(iconView, "scaleX", 1, 0.5f), ObjectAnimator .ofFloat(iconView, "scaleY", 1, 0.5f), rotation ); flyUpAnim.addListener(new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animation) { } @Override public void onAnimationEnd(Animator animation) { // 飞机飞入动画 downPlaneAnimation(iconView); } @Override public void onAnimationCancel(Animator animation) { } @Override public void onAnimationRepeat(Animator animation) { } }); flyUpAnim.start(); } /** * 飞机飞入动画 */ private void downPlaneAnimation(final View iconView) { final int offDistX = -iconView.getRight(); final int offDistY = -UIUtility.dipTopx(mContext, 10); AnimatorSet flyDownAnim = new AnimatorSet(); flyDownAnim.setDuration(500); ObjectAnimator transX1 = ObjectAnimator .ofFloat(iconView, "translationX", UIUtility.getScreenWidth(mContext), offDistX); ObjectAnimator transY1 = ObjectAnimator .ofFloat(iconView, "translationY", - UIUtility.getScreenHeight(mContext), offDistY); transY1.setInterpolator( PathInterpolatorCompat.create(0.1f, 1f)); ObjectAnimator rotation1 = ObjectAnimator .ofFloat(iconView, "rotation", iconView.getRotation(), 0); rotation1.setInterpolator( new AccelerateInterpolator()); flyDownAnim.playTogether(transX1, transY1, ObjectAnimator .ofFloat(iconView, "scaleX", 0.5f, 0.9f), ObjectAnimator .ofFloat(iconView, "scaleY", 0.5f, 0.9f), rotation1 ); flyDownAnim.addListener( new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animation) { iconView.setRotationY(180); } @Override public void onAnimationEnd(Animator animation) { } @Override public void onAnimationCancel(Animator animation) { } @Override public void onAnimationRepeat(Animator animation) { } }); AnimatorSet flyInAnim = new AnimatorSet(); flyInAnim.setDuration(500); flyInAnim.setInterpolator( new DecelerateInterpolator()); ObjectAnimator tranX2 = ObjectAnimator .ofFloat(iconView, "translationX", offDistX, iconX); ObjectAnimator tranY2 = ObjectAnimator .ofFloat(iconView, "translationY", offDistY, iconY); ObjectAnimator rotationX2 = ObjectAnimator .ofFloat(iconView, "rotationX", 30, 0); flyInAnim.playTogether(tranX2, tranY2, rotationX2, ObjectAnimator.ofFloat(iconView, "scaleX", 0.9f, 1f), ObjectAnimator.ofFloat(iconView, "scaleY", 0.9f, 1f)); flyInAnim.setStartDelay(100); flyInAnim.addListener(new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animation) { iconView.setRotationY(0); } @Override public void onAnimationEnd(Animator animation) { } @Override public void onAnimationCancel(Animator animation) { } @Override public void onAnimationRepeat(Animator animation) { } }); AnimatorSet mFlyAnimator = new AnimatorSet(); mFlyAnimator.playSequentially(flyDownAnim, flyInAnim); mFlyAnimator.start(); }
这样一来纸飞机的进入和点击离开动画就完成了。
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