Android实现悬浮图片
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2022-07-03 16:05:24
本文实例为大家分享了android实现悬浮图片的具体代码,供大家参考,具体内容如下@suppresslint("appcompatcustomview")public class moveimagev...
本文实例为大家分享了android实现悬浮图片的具体代码,供大家参考,具体内容如下
@suppresslint("appcompatcustomview") public class moveimageview extends imageview { //按下那一刻的坐标和 控件上下左右距离 private float lastx; private float lasty; private int left; private int top; private int right; private int bottom; //如果是拖动事件就不用响应点击事件 boolean ismove = false; boolean isanimatoring = false; //屏幕宽高 private int screenwidthpx; private int screenheightpx; public moveimageview(context context) { this(context, null); } public moveimageview(context context, @nullable attributeset attrs) { this(context, attrs, 0); } public moveimageview(context context, @nullable attributeset attrs, int defstyleattr) { super(context, attrs, defstyleattr); screenwidthpx = getscreenwidthpx(getcontext()); screenheightpx = getscreenheightpx(getcontext()); } @override public boolean ontouchevent(motionevent event) { switch (event.getaction()) { case motionevent.action_down: //动画执行过程中,不响应一切操作, // 这里相当于不让其走后面的motionevent.action_move:与motionevent.action_up: if (isanimatoring) { return false; } lastx = event.getrawx(); lasty = event.getrawy(); left = getleft(); top = gettop(); right = getright(); bottom = getbottom(); break; case motionevent.action_move: ismove = true; float x = event.getrawx(); float y = event.getrawy(); int l = (int) (left + (x - lastx)); int t = (int) (top + (y - lasty)); int r = (int) (right + (x - lastx)); int b = (int) (bottom + (y - lasty)); layout(l, t, r, b); break; case motionevent.action_up: if (ismove) { //如果顶部拖出屏幕外面,回正 if (gettop() < 0) { layout(getleft(), 0, getright(), getheight()); } //getbottom() 获取到的是 控件底部到父容器顶部的距离,所以需要减去状态栏的高度 int bottomheight = screenheightpx - getstatusbarheight(getcontext()); //如果底部拖出屏幕外面,回正 if (getbottom() > bottomheight) { layout(getleft(), bottomheight-getheight(), getright(), bottomheight); } ismove = false; startanimation(); return true; } return super.ontouchevent(event); } return super.ontouchevent(event); } private void startanimation() { isanimatoring = true; //右边距 int marinright = displayutils.dptopx(20); int endvalue = screenwidthpx - marinright; valueanimator animator = valueanimator.ofint(getright(), endvalue); animator.setduration(math.abs(endvalue - getright()) > 1000 ? 1000 : math.abs(endvalue - getright())); animator.addupdatelistener(new valueanimator.animatorupdatelistener() { @override public void onanimationupdate(valueanimator animation) { int curvalue = (int) animation.getanimatedvalue(); layout(curvalue - getwidth(), gettop(), curvalue, getheight() + gettop()); } }); animator.addlistener(new animatorlisteneradapter() { @override public void onanimationstart(animator animation) { } @override public void onanimationend(animator animation) { isanimatoring = false; animator.removeallupdatelisteners(); animator.removealllisteners(); } }); animator.start(); } /** * 获取状态栏高度 */ public static int getstatusbarheight(context context) { int result = 24; int resid = context.getresources().getidentifier("status_bar_height", "dimen", "android"); if (resid > 0) { result = context.getresources().getdimensionpixelsize(resid); } else { result = (int) typedvalue.applydimension(typedvalue.complex_unit_dip, result, resources.getsystem().getdisplaymetrics()); } return result; } public static int getscreenwidthpx(context context) { windowmanager windowmanager = (windowmanager) context.getsystemservice(context.window_service); displaymetrics dm = new displaymetrics(); if (windowmanager != null) { // windowmanager.getdefaultdisplay().getmetrics(dm); windowmanager.getdefaultdisplay().getrealmetrics(dm); return dm.widthpixels; } return 0; } public static int getscreenheightpx(context context) { windowmanager windowmanager = (windowmanager) context.getsystemservice(context.window_service); displaymetrics dm = new displaymetrics(); if (windowmanager != null) { // windowmanager.getdefaultdisplay().getmetrics(dm); windowmanager.getdefaultdisplay().getrealmetrics(dm); return dm.heightpixels; } return 0; } }
应用:
布局文件:
<?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" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".testactivity"> <com.lingtao.ltvideo.widgets.moveimageview android:layout_width="50dp" android:id="@+id/moveimageview" android:layout_height="50dp" android:layout_alignparentright="true" android:layout_alignparentbottom="true" android:layout_marginbottom="100dp" android:layout_marginright="20dp" android:src="#ff0000" /> </relativelayout>
activity:
public class testactivity extends appcompatactivity { private moveimageview moveimageview; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_test2); moveimageview = ((moveimageview) findviewbyid(r.id.moveimageview)); moveimageview.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { toast.maketext(testactivity.this, "点击事件", toast.length_short).show(); } }); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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