仿抖音視訊詳情頁點贊紅心動效
阿新 • • 發佈:2018-12-12
GitHub地址:
https://github.com/selfconzrr/LikeAnimator
可直接測試執行
核心思路:
自定義 View 繼承自 RelativeLayout ,重寫 onTouchEvent,在點選時觸發將心形的圖片 add 到整個 view 中,然後在執行動畫。主要的處理邏輯都在 onTouchEvent() 事件中。
首先,我們需要在觸控事件中做監聽,當有觸控時,建立一個展示心形圖片的 ImageView;然後設定圖片展示的位置,需要在手指觸控的位置上方,即觸控點是心形的下方角的位置;接下來設定 imageView 動畫 AnimatorSet,並記住:我們不可能無限制的增加 view,在 view 消失之後,需要手動的移除改 imageView。
package com.example.zhangruirui.likeanimator;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.TimeInterpolator;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.LinearInterpolator;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import java.util.Random;
/**
* ZhangRuirui:2018/08/31
* 在點選時觸發將心形的圖片 add 到整個 view 中,然後在執行動畫。主要的處理邏輯都在 onTouchEvent() 事件中
*/
public class LoveAnimator extends RelativeLayout {
private Context mContext;
final float[] num = {-30, -20, 0, 20, 30}; // 隨機心形圖片的角度
public LoveAnimator(Context context) {
this(context, null);
}
public LoveAnimator(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public LoveAnimator(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
@SuppressLint("NewApi")
public LoveAnimator(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
initView(context);
}
private void initView(Context context) {
mContext = context;
}
@Override
protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
}
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouchEvent(MotionEvent event) {
// 首先,我們需要在觸控事件中做監聽,當有觸控時,建立一個展示心形圖片的 ImageView
final ImageView imageView = new ImageView(mContext);
// 設定圖片展示的位置,需要在手指觸控的位置上方,即觸控點是心形的下方角的位置。所以我們需要將 ImageView 設定到手指的位置
LayoutParams params = new LayoutParams(300, 300);
params.leftMargin = (int) event.getX() - 150;
params.topMargin = (int) event.getY() - 300;
imageView.setImageDrawable(getResources().getDrawable(R.drawable.details_icon_like_pressed));
imageView.setLayoutParams(params);
addView(imageView);
// 設定 imageView 動畫
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.play(scale(imageView, "scaleX", 2f, 0.9f, 100, 0)) // 縮放動畫,X軸2倍縮小至0.9倍
.with(scale(imageView, "scaleY", 2f, 0.9f, 100, 0)) // 縮放動畫,Y軸2倍縮小至0.9倍
.with(rotation(imageView, 0, 0, num[new Random().nextInt(4)])) // 旋轉動畫,隨機旋轉角度num={-30.-20,0,20,30}
.with(alpha(imageView, 0, 1, 100, 0)) // 漸變透明度動畫,透明度從0-1.
.with(scale(imageView, "scaleX", 0.9f, 1, 50, 150)) // 縮放動畫,X軸0.9倍縮小至1倍
.with(scale(imageView, "scaleY", 0.9f, 1, 50, 150)) // 縮放動畫,Y軸0.9倍縮小至1倍
.with(translationY(imageView, 0, -600, 800, 400)) // 平移動畫,Y軸從0向上移動600單位
.with(alpha(imageView, 1, 0, 300, 400)) // 透明度動畫,從1-0
.with(scale(imageView, "scaleX", 1, 3f, 700, 400)) // 縮放動畫,X軸1倍放大至3倍
.with(scale(imageView, "scaleY", 1, 3f, 700, 400)); // 縮放動畫,Y軸1倍放大至3倍
animatorSet.start();
// 我們不可能無限制的增加 view,在 view 消失之後,需要手動的移除改 imageView
animatorSet.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
removeViewInLayout(imageView);
}
});
return super.onTouchEvent(event);
}
public static ObjectAnimator scale(View view, String propertyName, float from, float to, long time, long delayTime) {
ObjectAnimator translation = ObjectAnimator.ofFloat(view
, propertyName
, from, to);
translation.setInterpolator(new LinearInterpolator());
translation.setStartDelay(delayTime);
translation.setDuration(time);
return translation;
}
public static ObjectAnimator translationX(View view, float from, float to, long time, long delayTime) {
ObjectAnimator translation = ObjectAnimator.ofFloat(view
, "translationX"
, from, to);
translation.setInterpolator(new LinearInterpolator());
translation.setStartDelay(delayTime);
translation.setDuration(time);
return translation;
}
public static ObjectAnimator translationY(View view, float from, float to, long time, long delayTime) {
ObjectAnimator translation = ObjectAnimator.ofFloat(view
, "translationY"
, from, to);
translation.setInterpolator(new LinearInterpolator());
translation.setStartDelay(delayTime);
translation.setDuration(time);
return translation;
}
public static ObjectAnimator alpha(View view, float from, float to, long time, long delayTime) {
ObjectAnimator translation = ObjectAnimator.ofFloat(view
, "alpha"
, from, to);
translation.setInterpolator(new LinearInterpolator());
translation.setStartDelay(delayTime);
translation.setDuration(time);
return translation;
}
public static ObjectAnimator rotation(View view, long time, long delayTime, float... values) {
ObjectAnimator rotation = ObjectAnimator.ofFloat(view, "rotation", values);
rotation.setDuration(time);
rotation.setStartDelay(delayTime);
rotation.setInterpolator(new TimeInterpolator() {
@Override
public float getInterpolation(float input) {
return input;
}
});
return rotation;
}
}