【Android 开发】使用不同的 interpolator、色彩渐变
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2023-09-06 21:19:28
singlefragmentactivity.java
package com.example.aster.draganddraw;
import android.os.bundle;...
singlefragmentactivity.java
package com.example.aster.draganddraw; import android.os.bundle; import android.support.annotation.layoutres; import android.support.v4.app.fragment; import android.support.v4.app.fragmentmanager; import android.support.v7.app.appcompatactivity; public abstract class singlefragmentactivity extends appcompatactivity { protected abstract fragment createfragment(); @layoutres protected int getlayoutresid() { return r.layout.activity_fragment; } @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(getlayoutresid()); fragmentmanager fm = getsupportfragmentmanager(); fragment fragment = fm.findfragmentbyid(r.id.fragment_container); if (fragment == null) { fragment = createfragment(); fm.begintransaction().add(r.id.fragment_container, fragment).commit(); } } }
sunsetactivity.java
package com.example.aster.sunset; import android.support.v4.app.fragment; import android.support.v7.app.appcompatactivity; import android.os.bundle; public class sunsetactivity extends singlefragmentactivity { @override protected fragment createfragment() { return sunsetfragment.newinstance(); } }
sunsetfragment.java
package com.example.aster.sunset; import android.animation.argbevaluator; import android.animation.objectanimator; import android.content.res.resources; import android.os.bundle; import android.support.v4.app.fragment; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.view.animation.accelerateinterpolator; public class sunsetfragment extends fragment { private view msceneview; private view msunview; private view mskyview; private int mblueskycolor; private int msunsetskycolor; private int mnightskycolor; public static sunsetfragment newinstance() { return new sunsetfragment(); } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { view view = inflater.inflate(r.layout.fragment_sunset, container, false); msceneview = view; msunview = view.findviewbyid(r.id.sun); mskyview = view.findviewbyid(r.id.sky); resources resources = getresources(); mblueskycolor = resources.getcolor(r.color.blue_sky); msunsetskycolor = resources.getcolor(r.color.sunset_sky); mnightskycolor = resources.getcolor(r.color.night_sky); msceneview.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { startanimation(); } }); return view; } private void startanimation() { float sunystart = msunview.gettop(); float sunyend = mskyview.getheight(); objectanimator heightanimator = objectanimator .offloat(msunview, "y", sunystart, sunyend) .setduration(3000); heightanimator.setinterpolator(new accelerateinterpolator()); objectanimator sunsetskyanimator = objectanimator .ofint(mskyview, "backgroundcolor", mblueskycolor, msunsetskycolor) .setduration(3000); sunsetskyanimator.setevaluator(new argbevaluator()); heightanimator.start(); sunsetskyanimator.start(); } }
res/drawable/sun.xml
activity_fragment.xml
<framelayout android:id="@+id/fragment_container" android:layout_height="match_parent" android:layout_width="match_parent" xmlns:android="https://schemas.android.com/apk/res/android"></framelayout>
fragment_sunset.xml
<framelayout android:background="@color/blue_sky" android:id="@+id/sky" android:layout_height="0dp" android:layout_weight="0.61" android:layout_width="match_parent"> </framelayout>
res/values/colors.xml
#3f51b5 #303f9f #ff4081 #fcfcb7 #1e7ac7 #ec8100 #05192e #224869
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