郑州网站开发汉狮,营销策划案例,找人做网站需要注意问题,搜索引擎不友好的网站特征最近在做一个屏保功能#xff0c;需要支持如图的上滑关闭功能。
因为屏保是可以左右滑动切换的#xff0c;内部是一个viewpager
做这个效果的时候#xff0c;关键就是要注意外层拦截触摸事件时#xff0c;需要有条件的拦截#xff0c;不能影响到内部viewpager的滑动处理… 最近在做一个屏保功能需要支持如图的上滑关闭功能。
因为屏保是可以左右滑动切换的内部是一个viewpager
做这个效果的时候关键就是要注意外层拦截触摸事件时需要有条件的拦截不能影响到内部viewpager的滑动处理。
以下是封装好的自定义view继承自FrameLayout
import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.FrameLayout;import androidx.annotation.NonNull;public class SlideCloseFrameLayout extends FrameLayout {/*** 滑动监听器*/public interface OnSlideCloseListener {/*** 滑动开始时调用*/void onStartSlide();/*** 滑动结束动画结束时调用isClose为true表示滑动关闭为false表示滑动恢复原位* param isClose*/void onStopSlide(boolean isClose);}private OnSlideCloseListener onSlideCloseListener;private static final String TAG SlideCloseFrameLayout;private float downY 0; // 记录手指按下时的Y坐标private boolean isSlideAction false; // 标记是否为滑动关闭动作private VelocityTracker velocityTracker null; // 速度跟踪器private float lastTranslationY 0; // 记录上一次的TranslationY值用于滑动时的位置更新public SlideCloseFrameLayout(Context context) {super(context);}public SlideCloseFrameLayout(Context context, AttributeSet attrs) {super(context, attrs);}public SlideCloseFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}Overridepublic boolean onInterceptTouchEvent(MotionEvent event) {try {int action event.getAction();switch (action) {case MotionEvent.ACTION_DOWN:downY event.getRawY();if (downY getHeight() - getHeight() / 5f) {initVelocityTracker();velocityTracker.addMovement(event);return false; // 拦截事件}break;case MotionEvent.ACTION_MOVE:velocityTracker.addMovement(event);velocityTracker.computeCurrentVelocity(1000);float xVelocity velocityTracker.getXVelocity();float yVelocity velocityTracker.getYVelocity();if (Math.abs(yVelocity) ViewConfiguration.get(getContext()).getScaledMinimumFlingVelocity() Math.abs(yVelocity) Math.abs(xVelocity)) {// 如果超过最小判定距离并且Y轴速度大于X轴速度才视为纵向滑动if (yVelocity 0) {// 向下滑动if (onSlideCloseListener ! null) {onSlideCloseListener.onStartSlide();}isSlideAction true;return true;}}break;case MotionEvent.ACTION_UP:case MotionEvent.ACTION_CANCEL:isSlideAction false;break;}} catch (Exception e) {e.printStackTrace();}return super.onInterceptTouchEvent(event);}Overridepublic boolean onTouchEvent(MotionEvent event) {try {if (isSlideAction) {velocityTracker.addMovement(event);int action event.getAction();switch (action) {case MotionEvent.ACTION_MOVE:float moveDistance event.getRawY() - downY;if (moveDistance 0) { // 仅当向上滑动时处理lastTranslationY moveDistance;this.setTranslationY(moveDistance);}break;case MotionEvent.ACTION_UP:case MotionEvent.ACTION_CANCEL:velocityTracker.computeCurrentVelocity(1000);float velocityY velocityTracker.getYVelocity();if (Math.abs(velocityY) 1000 || Math.abs(lastTranslationY) getHeight() / 5f) {slideUpAndExit();} else {slideBack();}releaseVelocityTracker();isSlideAction false;break;}return true;}} catch (Exception e) {e.printStackTrace();}return super.onTouchEvent(event);}public boolean isSlideAction() {return isSlideAction;}public OnSlideCloseListener getOnSlideCloseListener() {return onSlideCloseListener;}public void setOnSlideCloseListener(OnSlideCloseListener onSlideCloseListener) {this.onSlideCloseListener onSlideCloseListener;}private void initVelocityTracker() {if (velocityTracker null) {velocityTracker VelocityTracker.obtain();} else {velocityTracker.clear();}}private void releaseVelocityTracker() {if (velocityTracker ! null) {velocityTracker.recycle();velocityTracker null;}}private void slideUpAndExit() {// 执行上移退出动画TranslateAnimation exitAnimation new TranslateAnimation(0, 0, getTranslationY(), -getHeight());exitAnimation.setDuration(300);exitAnimation.setFillAfter(false);exitAnimation.setAnimationListener(new Animation.AnimationListener() {Overridepublic void onAnimationStart(Animation animation) {}Overridepublic void onAnimationEnd(Animation animation) {// 动画结束后的操作setVisibility(View.GONE); // 隐藏或其他逻辑if (onSlideCloseListener ! null) {onSlideCloseListener.onStopSlide(true);}}Overridepublic void onAnimationRepeat(Animation animation) {}});startAnimation(exitAnimation);this.setTranslationY(0); // 重置TranslationY值}private void slideBack() {// 使用属性动画使视图回到原位ObjectAnimator animator ObjectAnimator.ofFloat(this, translationY, getTranslationY(), 0);animator.setDuration(300);animator.start();animator.addListener(new Animator.AnimatorListener(){Overridepublic void onAnimationStart(NonNull Animator animation) {}Overridepublic void onAnimationEnd(NonNull Animator animation) {if (onSlideCloseListener ! null) {onSlideCloseListener.onStopSlide(false);}}Overridepublic void onAnimationCancel(NonNull Animator animation) {if (onSlideCloseListener ! null) {onSlideCloseListener.onStopSlide(false);}}Overridepublic void onAnimationRepeat(NonNull Animator animation) {}});}
}Activity使用时只需要把根View设置为这个自定义view然后透明主题透明背景同时关闭Activity的进入退出动画便可以实现如图效果了。
嵌套使用时不会影响到内部的Viewpager或其他可滑动view
