android开发中引导页解析
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2022-06-01 20:31:52
引导页是几乎所有app都会使用的,这不是什么很难实现的功能,在这里做记录是方便以后使用,不用在去写而是直接可以拿来使用
public class carouselactivity extends...
引导页是几乎所有app都会使用的,这不是什么很难实现的功能,在这里做记录是方便以后使用,不用在去写而是直接可以拿来使用
public class carouselactivity extends baseactivity implements onclicklistener, onpagechangelistener { private viewpager vp; private viewpageradapter vpadapter; private list views; private button button; private static final int[] pics = {r.mipmap.carousel1, r.mipmap.carousel2, r.mipmap.carousel3, r.mipmap.carousel4}; private imageview[] dots; private int currentindex; /** * called when the activity is first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_carousel); statusbarutil.settransparentforwindow(this); //解决华为虚拟键问题 if (build.version.sdk_int >= build.version_codes.kitkat) { getwindow().addflags(windowmanager.layoutparams.flag_translucent_navigation); } checkdevicehasnavigationbar(getapplicationcontext()); //判断是否有虚拟键 if (checkdevicehasnavigationbar(getapplicationcontext())) { solvenavigationbar(getwindow()); } button = (button) findviewbyid(r.id.button); views = new arraylist(); linearlayout.layoutparams mparams = new linearlayout.layoutparams(linearlayout.layoutparams.wrap_content, linearlayout.layoutparams.wrap_content); for (int i = 0; i < pics.length; i++) { imageview iv = new imageview(this); iv.setlayoutparams(mparams); iv.setimageresource(pics[i]); views.add(iv); } vp = (viewpager) findviewbyid(r.id.viewpager); vpadapter = new viewpageradapter(views); vp.setadapter(vpadapter); vp.setonpagechangelistener(this); // button = (button) findviewbyid(r.id.button); initdots(); button.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { carouselactivity.this.finish(); intent intent = new intent(); intent.setclass(carouselactivity.this, mainactivity.class); // intent.setflags(intent.flag_activity_clear_top);//它可以关掉所要到的界面中间的activity startactivity(intent); } }); } /** *shang
*判断是否有虚拟按键
* * @param context * @return */ public boolean checkdevicehasnavigationbar(context context) { boolean hasnavigationbar = false; resources rs = context.getresources(); int id = rs.getidentifier("config_shownavigationbar", "bool", "android"); if (id > 0) { hasnavigationbar = rs.getboolean(id); } try { class systempropertiesclass = class.forname("android.os.systemproperties"); method m = systempropertiesclass.getmethod("get", string.class); string navbaroverride = (string) m.invoke(systempropertiesclass, "qemu.hw.mainkeys"); if ("1".equals(navbaroverride)) { hasnavigationbar = false; } else if ("0".equals(navbaroverride)) { hasnavigationbar = true; } } catch (exception e) { } return hasnavigationbar; } /** *shang
*解决虚拟按键问题
* * @param window */ public void solvenavigationbar(window window) { //保持布局状态 int uioptions = view.system_ui_flag_layout_stable | //布局位于状态栏下方 view.system_ui_flag_layout_hide_navigation | //全屏 view.system_ui_flag_fullscreen | //隐藏导航栏 view.system_ui_flag_hide_navigation | view.system_ui_flag_layout_fullscreen; if (build.version.sdk_int >= 19) { uioptions |= 0x00001000; } else { uioptions |= view.system_ui_flag_low_profile; } window.getdecorview().setsystemuivisibility(uioptions); } private void initdots() { linearlayout ll = (linearlayout) findviewbyid(r.id.ll); dots = new imageview[pics.length]; for (int i = 0; i < pics.length; i++) { dots[i] = (imageview) ll.getchildat(i); dots[i].setenabled(true); dots[i].setonclicklistener(this); dots[i].settag(i); } currentindex = 0; dots[currentindex].setenabled(false); } private void setcurview(int position) { if (position < 0 || position >= pics.length) { return; } vp.setcurrentitem(position); } private void setcurdot(int positon) { if (positon < 0 || positon > pics.length - 1 || currentindex == positon) { return; } dots[positon].setenabled(false); dots[currentindex].setenabled(true); currentindex = positon; } @override public void onpagescrollstatechanged(int arg0) { // todo auto-generated method stub } @override public void onpagescrolled(int arg0, float arg1, int arg2) { // todo auto-generated method stub } @override public void onpageselected(int arg0) { setcurdot(arg0); if (arg0 == 3) { button.setvisibility(view.visible); } else { button.setvisibility(view.gone); } } @override public void onclick(view v) { int position = (integer) v.gettag(); setcurview(position); setcurdot(position); } class viewpageradapter extends pageradapter { private list views; public viewpageradapter(list views) { this.views = views; } @override public void destroyitem(view arg0, int arg1, object arg2) { ((viewpager) arg0).removeview(views.get(arg1)); } @override public void finishupdate(view arg0) { // todo auto-generated method stub } @override public int getcount() { if (views != null) { return views.size(); } return 0; } @override public object instantiateitem(view arg0, int arg1) { ((viewpager) arg0).addview(views.get(arg1), 0); return views.get(arg1); } @override public boolean isviewfromobject(view arg0, object arg1) { return (arg0 == arg1); } @override public void restorestate(parcelable arg0, classloader arg1) { // todo auto-generated method stub } @override public parcelable savestate() { // todo auto-generated method stub return null; } @override public void startupdate(view arg0) { // todo auto-generated method stub } } }
<relativelayout xmlns:android="https://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <android.support.v4.view.viewpager android:scaletype="center" android:id="@+id/viewpager" android:layout_gravity="center" android:layout_width="match_parent" android:layout_height="match_parent" /> <linearlayout android:visibility="gone" android:id="@+id/ll" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginbottom="24.0dip" android:layout_alignparentbottom="true" android:layout_centerhorizontal="true"> <imageview android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> <imageview android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> <imageview android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> <imageview android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> linearlayout> <button android:background="@null" android:id="@+id/button" android:layout_width="100dp" android:layout_height="50dp" android:layout_above="@id/ll" android:layout_centerhorizontal="true" android:layout_alignparentbottom="true" android:layout_marginbottom="20dp" /> relativelayout>
欢迎页做判断
if (preferences.getboolean("firststart", true)) { new handler().postdelayed(new runnable() { @override public void run() { editor = preferences.edit(); //将登录标志位设置为false,下次登录时不在显示首次登录界面 editor.putboolean("firststart", false); editor.commit(); intent intent=new intent(); intent.setclass(welcomeactivity.this,carouselactivity.class); startactivity(intent); finish(); } },2000); }代码基本就是这些,有些地方需要自己补充。
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