前言
學(xué)習(xí)自定義view，想找點(diǎn)東西耍一下，剛好看到抖音的點(diǎn)贊效果不錯(cuò)，嘗試一下。
抖音效果：
話(huà)不多說(shuō)，先上代碼：
public class Love extends RelativeLayout { private Context mContext; float[] num = {-30, -20, 0, 20, 30};//隨機(jī)心形圖片角度 public Love(Context context) { super(context); initView(context); } public Love(Context context, @Nullable AttributeSet attrs) { super(context, attrs); initView(context); } public Love(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(context); } private void initView(Context context) { mContext = context; } @Override protected void dispatchDraw(Canvas canvas) { super.dispatchDraw(canvas); ImageView imageView = new ImageView(mContext); LayoutParams params = new LayoutParams(100, 100); params.leftMargin = getWidth() - 200; params.topMargin = getHeight() / 2 - 300; imageView.setImageDrawable(getResources().getDrawable(R.drawable.heart_red)); imageView.setLayoutParams(params); addView(imageView); imageView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(mContext, "這里是點(diǎn)擊愛(ài)心的動(dòng)畫(huà)，待展示", Toast.LENGTH_SHORT).show(); } }); } @Override public boolean onTouchEvent(MotionEvent event) { final ImageView imageView = new ImageView(mContext); LayoutParams params = new LayoutParams(300, 300); params.leftMargin = (int) event.getX() - 150; params.topMargin = (int) event.getY() - 300; imageView.setImageDrawable(getResources().getDrawable(R.drawable.heart_red)); imageView.setLayoutParams(params); addView(imageView); AnimatorSet animatorSet = new AnimatorSet(); animatorSet.play(scale(imageView, "scaleX", 2f, 0.9f, 100, 0)) .with(scale(imageView, "scaleY", 2f, 0.9f, 100, 0)) .with(rotation(imageView, 0, 0, num[new Random().nextInt(4)])) .with(alpha(imageView, 0, 1, 100, 0)) .with(scale(imageView, "scaleX", 0.9f, 1, 50, 150)) .with(scale(imageView, "scaleY", 0.9f, 1, 50, 150)) .with(translationY(imageView, 0, -600, 800, 400)) .with(alpha(imageView, 1, 0, 300, 400)) .with(scale(imageView, "scaleX", 1, 3f, 700, 400)) .with(scale(imageView, "scaleY", 1, 3f, 700, 400)); animatorSet.start(); 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; } }實(shí)現(xiàn)思路
在點(diǎn)擊時(shí)觸發(fā)將心形的圖片add到整個(gè)view中，然后在執(zhí)行動(dòng)畫(huà)。主要的處理邏輯都在onTouchEvent()事件中，下面我們來(lái)詳細(xì)講解一下思路和代碼：
@Override public boolean onTouchEvent(MotionEvent event) { final ImageView imageView = new ImageView(mContext); LayoutParams params = new LayoutParams(300, 300); params.leftMargin = (int) event.getX() - 150; params.topMargin = (int) event.getY() - 300; imageView.setImageDrawable(getResources().getDrawable(R.drawable.heart_red)); imageView.setLayoutParams(params); addView(imageView); AnimatorSet animatorSet = new AnimatorSet(); animatorSet.play(scale(imageView, "scaleX", 2f, 0.9f, 100, 0)) .with(scale(imageView, "scaleY", 2f, 0.9f, 100, 0)) .with(rotation(imageView, 0, 0, num[new Random().nextInt(4)])) .with(alpha(imageView, 0, 1, 100, 0)) .with(scale(imageView, "scaleX", 0.9f, 1, 50, 150)) .with(scale(imageView, "scaleY", 0.9f, 1, 50, 150)) .with(translationY(imageView, 0, -600, 800, 400)) .with(alpha(imageView, 1, 0, 300, 400)) .with(scale(imageView, "scaleX", 1, 3f, 700, 400)) .with(scale(imageView, "scaleY", 1, 3f, 700, 400)); animatorSet.start(); animatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); removeViewInLayout(imageView); } }); return super.onTouchEvent(event); }•首先，我們需要在觸摸事件中做監(jiān)聽(tīng)，當(dāng)有觸摸時(shí)，創(chuàng)建一個(gè)展示心形圖片的ImageView。
final ImageView imageView = new ImageView(mContext); imageView.setImageDrawable(getResources().getDrawable(R.drawable.heart_red));//設(shè)置紅色心形圖片
•設(shè)置圖片展示的位置，是需要在手指觸摸的位置上方，即觸摸點(diǎn)是心形的下方角的位置。所以我們需要將ImageView設(shè)置到手指的位置
LayoutParams params = new LayoutParams(300, 300); params.leftMargin = (int) event.getX() - 150; params.topMargin = (int) event.getY() - 300; imageView.setLayoutParams(params);
•給imageView add到父view中。
addView(imageView);
•設(shè)置imageView動(dòng)畫(huà)
AnimatorSet animatorSet = new AnimatorSet(); animatorSet.play(scale(imageView, "scaleX", 2f, 0.9f, 100, 0))//縮放動(dòng)畫(huà)，X軸2倍縮小至0.9倍 .with(scale(imageView, "scaleY", 2f, 0.9f, 100, 0))//縮放動(dòng)畫(huà)，Y軸2倍縮小至0.9倍 .with(rotation(imageView, 0, 0, num[new Random().nextInt(4)]))//旋轉(zhuǎn)動(dòng)畫(huà)，隨機(jī)旋轉(zhuǎn)角度num={-30.-20，0，20，30} .with(alpha(imageView, 0, 1, 100, 0))//漸變透明度動(dòng)畫(huà)，透明度從0-1. .with(scale(imageView, "scaleX", 0.9f, 1, 50, 150))//縮放動(dòng)畫(huà)，X軸0.9倍縮小至1倍 .with(scale(imageView, "scaleY", 0.9f, 1, 50, 150))//縮放動(dòng)畫(huà)，Y軸0.9倍縮小至1倍 .with(translationY(imageView, 0, -600, 800, 400))//平移動(dòng)畫(huà)，Y軸從0向上移動(dòng)600單位 .with(alpha(imageView, 1, 0, 300, 400))//透明度動(dòng)畫(huà)，從1-0 .with(scale(imageView, "scaleX", 1, 3f, 700, 400))//縮放動(dòng)畫(huà)，X軸1倍放大至3倍 .with(scale(imageView, "scaleY", 1, 3f, 700, 400));//縮放動(dòng)畫(huà)，Y軸1倍放大至3倍animatorSet.start();•當(dāng)然，我們不可能無(wú)限制的增加view，在view消失之后，需要手動(dòng)的移除改ImageView。
animatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); removeViewInLayout(imageView); } });效果如下：
總結(jié)
以上所述是小編給大家介紹的Android自定義view實(shí)現(xiàn)仿抖音點(diǎn)贊效果，希望對(duì)大家有所幫助，如果大家有任何疑問(wèn)請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)武林網(wǎng)網(wǎng)站的支持！
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